./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/pthread-wmm/mix014.opt.i --full-output --witness-type correctness_witness --witnessparser.only.consider.loop.invariants false --cacsl2boogietranslator.check.unreachability.of.reach_error.function false --validate ./goblint.2024-05-21_14-57-05.files/protection/mix014.opt.yml/witness.yml --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version bcb38a6f 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/mix014.opt.i ./goblint.2024-05-21_14-57-05.files/protection/mix014.opt.yml/witness.yml -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --traceabstraction.compute.hoare.annotation.of.negated.interpolant.automaton,.abstraction.and.cfg false --witnessparser.only.consider.loop.invariants false --cacsl2boogietranslator.check.unreachability.of.reach_error.function false --- Real Ultimate output --- This is Ultimate 0.2.4-tmp.fs.goblint-validation-bcb38a6-m [2024-06-03 19:18:50,748 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-06-03 19:18:50,811 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-06-03 19:18:50,816 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-06-03 19:18:50,816 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-06-03 19:18:50,840 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-06-03 19:18:50,841 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-06-03 19:18:50,841 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-06-03 19:18:50,842 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-06-03 19:18:50,845 INFO L153 SettingsManager]: * Use memory slicer=true [2024-06-03 19:18:50,845 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-06-03 19:18:50,845 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-06-03 19:18:50,846 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-06-03 19:18:50,847 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-06-03 19:18:50,847 INFO L153 SettingsManager]: * Use SBE=true [2024-06-03 19:18:50,848 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-06-03 19:18:50,848 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-06-03 19:18:50,848 INFO L153 SettingsManager]: * sizeof long=4 [2024-06-03 19:18:50,848 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-06-03 19:18:50,849 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-06-03 19:18:50,849 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-06-03 19:18:50,849 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-06-03 19:18:50,850 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-06-03 19:18:50,850 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-06-03 19:18:50,850 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-06-03 19:18:50,850 INFO L153 SettingsManager]: * sizeof long double=12 [2024-06-03 19:18:50,851 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-06-03 19:18:50,851 INFO L153 SettingsManager]: * Use constant arrays=true [2024-06-03 19:18:50,851 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-06-03 19:18:50,852 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-06-03 19:18:50,852 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-06-03 19:18:50,853 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-06-03 19:18:50,853 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-03 19:18:50,853 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-06-03 19:18:50,853 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-06-03 19:18:50,854 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-06-03 19:18:50,854 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-06-03 19:18:50,854 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-06-03 19:18:50,854 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-06-03 19:18:50,854 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-06-03 19:18:50,855 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-06-03 19:18:50,855 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-06-03 19:18:50,855 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-06-03 19:18:50,855 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check unreachability of reach_error function -> false [2024-06-03 19:18:51,066 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-06-03 19:18:51,092 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-06-03 19:18:51,094 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-06-03 19:18:51,095 INFO L270 PluginConnector]: Initializing CDTParser... [2024-06-03 19:18:51,096 INFO L274 PluginConnector]: CDTParser initialized [2024-06-03 19:18:51,097 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-wmm/mix014.opt.i [2024-06-03 19:18:52,197 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-06-03 19:18:52,410 INFO L384 CDTParser]: Found 1 translation units. [2024-06-03 19:18:52,410 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/mix014.opt.i [2024-06-03 19:18:52,435 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7ed92cc38/f8dcc271035942628a690d0ade688e71/FLAGb5b165e03 [2024-06-03 19:18:52,446 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7ed92cc38/f8dcc271035942628a690d0ade688e71 [2024-06-03 19:18:52,448 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-06-03 19:18:52,450 INFO L274 PluginConnector]: Witness Parser initialized [2024-06-03 19:18:52,451 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/./goblint.2024-05-21_14-57-05.files/protection/mix014.opt.yml/witness.yml [2024-06-03 19:18:52,596 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-06-03 19:18:52,597 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-06-03 19:18:52,598 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-06-03 19:18:52,599 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-06-03 19:18:52,602 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-06-03 19:18:52,603 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.06 07:18:52" (1/2) ... [2024-06-03 19:18:52,604 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4acba27d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.06 07:18:52, skipping insertion in model container [2024-06-03 19:18:52,604 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.06 07:18:52" (1/2) ... [2024-06-03 19:18:52,605 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@2f60ba51 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.06 07:18:52, skipping insertion in model container [2024-06-03 19:18:52,606 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 03.06 07:18:52" (2/2) ... [2024-06-03 19:18:52,606 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4acba27d and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 03.06 07:18:52, skipping insertion in model container [2024-06-03 19:18:52,606 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 03.06 07:18:52" (2/2) ... [2024-06-03 19:18:52,606 INFO L83 nessWitnessExtractor]: Extracting all invariants from correctness witness [2024-06-03 19:18:52,714 INFO L95 edCorrectnessWitness]: Found the following entries in the witness: [2024-06-03 19:18:52,715 INFO L97 edCorrectnessWitness]: Location invariant before [L874-L874] (((((((((((((((((((((((! multithreaded || ((0 <= z$w_buff1 && z$w_buff1 <= 1) && (z$w_buff1 == 0 || z$w_buff1 == 1))) && (! multithreaded || z$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || z$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || ((0 <= a && a <= 1) && (a == 0 || a == 1)))) && (! multithreaded || z$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || z$read_delayed_var == 0)) && (! multithreaded || ((0 <= __unbuffered_p3_EBX && __unbuffered_p3_EBX <= 1) && (__unbuffered_p3_EBX == 0 || __unbuffered_p3_EBX == 1)))) && (! multithreaded || z$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || z$read_delayed == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p3_EAX && __unbuffered_p3_EAX <= 1) && (__unbuffered_p3_EAX == 0 || __unbuffered_p3_EAX == 1)))) && (! multithreaded || z$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || ((0 <= z && z <= 1) && (z == 0 || z == 1)))) && (! multithreaded || z$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || z$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || ((0 <= z$w_buff0 && z$w_buff0 <= 1) && (z$w_buff0 == 0 || z$w_buff0 == 1)))) && (! multithreaded || ((0 <= z$mem_tmp && z$mem_tmp <= 1) && (z$mem_tmp == 0 || z$mem_tmp == 1)))) && (! multithreaded || ((0 <= __unbuffered_p1_EBX && __unbuffered_p1_EBX <= 1) && (__unbuffered_p1_EBX == 0 || __unbuffered_p1_EBX == 1)))) && (! multithreaded || ((0 <= y && y <= 1) && (y == 0 || y == 1)))) && (! multithreaded || (((0 <= __unbuffered_p1_EAX && __unbuffered_p1_EAX <= 2) && __unbuffered_p1_EAX <= 127) && ((__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1) || __unbuffered_p1_EAX == 2)))) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || (((0 <= x && x <= 2) && x <= 127) && ((x == 0 || x == 1) || x == 2)))) && (! multithreaded || z$flush_delayed == (_Bool)0)) && (! multithreaded || z$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p2_EAX && __unbuffered_p2_EAX <= 1) && (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1))) [2024-06-03 19:18:52,715 INFO L97 edCorrectnessWitness]: Location invariant before [L872-L872] (((((((((((((((((((((((! multithreaded || ((0 <= z$w_buff1 && z$w_buff1 <= 1) && (z$w_buff1 == 0 || z$w_buff1 == 1))) && (! multithreaded || z$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || z$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || ((0 <= a && a <= 1) && (a == 0 || a == 1)))) && (! multithreaded || z$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || z$read_delayed_var == 0)) && (! multithreaded || ((0 <= __unbuffered_p3_EBX && __unbuffered_p3_EBX <= 1) && (__unbuffered_p3_EBX == 0 || __unbuffered_p3_EBX == 1)))) && (! multithreaded || z$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || z$read_delayed == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p3_EAX && __unbuffered_p3_EAX <= 1) && (__unbuffered_p3_EAX == 0 || __unbuffered_p3_EAX == 1)))) && (! multithreaded || z$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || ((0 <= z && z <= 1) && (z == 0 || z == 1)))) && (! multithreaded || z$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || z$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || ((0 <= z$w_buff0 && z$w_buff0 <= 1) && (z$w_buff0 == 0 || z$w_buff0 == 1)))) && (! multithreaded || ((0 <= z$mem_tmp && z$mem_tmp <= 1) && (z$mem_tmp == 0 || z$mem_tmp == 1)))) && (! multithreaded || ((0 <= __unbuffered_p1_EBX && __unbuffered_p1_EBX <= 1) && (__unbuffered_p1_EBX == 0 || __unbuffered_p1_EBX == 1)))) && (! multithreaded || ((0 <= y && y <= 1) && (y == 0 || y == 1)))) && (! multithreaded || (((0 <= __unbuffered_p1_EAX && __unbuffered_p1_EAX <= 2) && __unbuffered_p1_EAX <= 127) && ((__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1) || __unbuffered_p1_EAX == 2)))) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || (((0 <= x && x <= 2) && x <= 127) && ((x == 0 || x == 1) || x == 2)))) && (! multithreaded || z$flush_delayed == (_Bool)0)) && (! multithreaded || z$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p2_EAX && __unbuffered_p2_EAX <= 1) && (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1))) [2024-06-03 19:18:52,716 INFO L97 edCorrectnessWitness]: Location invariant before [L877-L877] (((((((((((((((((((((((! multithreaded || ((0 <= z$w_buff1 && z$w_buff1 <= 1) && (z$w_buff1 == 0 || z$w_buff1 == 1))) && (! multithreaded || z$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || z$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || ((0 <= a && a <= 1) && (a == 0 || a == 1)))) && (! multithreaded || z$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || z$read_delayed_var == 0)) && (! multithreaded || ((0 <= __unbuffered_p3_EBX && __unbuffered_p3_EBX <= 1) && (__unbuffered_p3_EBX == 0 || __unbuffered_p3_EBX == 1)))) && (! multithreaded || z$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || z$read_delayed == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p3_EAX && __unbuffered_p3_EAX <= 1) && (__unbuffered_p3_EAX == 0 || __unbuffered_p3_EAX == 1)))) && (! multithreaded || z$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || ((0 <= z && z <= 1) && (z == 0 || z == 1)))) && (! multithreaded || z$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || z$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || ((0 <= z$w_buff0 && z$w_buff0 <= 1) && (z$w_buff0 == 0 || z$w_buff0 == 1)))) && (! multithreaded || ((0 <= z$mem_tmp && z$mem_tmp <= 1) && (z$mem_tmp == 0 || z$mem_tmp == 1)))) && (! multithreaded || ((0 <= __unbuffered_p1_EBX && __unbuffered_p1_EBX <= 1) && (__unbuffered_p1_EBX == 0 || __unbuffered_p1_EBX == 1)))) && (! multithreaded || ((0 <= y && y <= 1) && (y == 0 || y == 1)))) && (! multithreaded || (((0 <= __unbuffered_p1_EAX && __unbuffered_p1_EAX <= 2) && __unbuffered_p1_EAX <= 127) && ((__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1) || __unbuffered_p1_EAX == 2)))) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || (((0 <= x && x <= 2) && x <= 127) && ((x == 0 || x == 1) || x == 2)))) && (! multithreaded || z$flush_delayed == (_Bool)0)) && (! multithreaded || z$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p2_EAX && __unbuffered_p2_EAX <= 1) && (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1))) [2024-06-03 19:18:52,716 INFO L97 edCorrectnessWitness]: Location invariant before [L876-L876] (((((((((((((((((((((((! multithreaded || ((0 <= z$w_buff1 && z$w_buff1 <= 1) && (z$w_buff1 == 0 || z$w_buff1 == 1))) && (! multithreaded || z$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || z$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || ((0 <= a && a <= 1) && (a == 0 || a == 1)))) && (! multithreaded || z$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || z$read_delayed_var == 0)) && (! multithreaded || ((0 <= __unbuffered_p3_EBX && __unbuffered_p3_EBX <= 1) && (__unbuffered_p3_EBX == 0 || __unbuffered_p3_EBX == 1)))) && (! multithreaded || z$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || z$read_delayed == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p3_EAX && __unbuffered_p3_EAX <= 1) && (__unbuffered_p3_EAX == 0 || __unbuffered_p3_EAX == 1)))) && (! multithreaded || z$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || ((0 <= z && z <= 1) && (z == 0 || z == 1)))) && (! multithreaded || z$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || z$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || ((0 <= z$w_buff0 && z$w_buff0 <= 1) && (z$w_buff0 == 0 || z$w_buff0 == 1)))) && (! multithreaded || ((0 <= z$mem_tmp && z$mem_tmp <= 1) && (z$mem_tmp == 0 || z$mem_tmp == 1)))) && (! multithreaded || ((0 <= __unbuffered_p1_EBX && __unbuffered_p1_EBX <= 1) && (__unbuffered_p1_EBX == 0 || __unbuffered_p1_EBX == 1)))) && (! multithreaded || ((0 <= y && y <= 1) && (y == 0 || y == 1)))) && (! multithreaded || (((0 <= __unbuffered_p1_EAX && __unbuffered_p1_EAX <= 2) && __unbuffered_p1_EAX <= 127) && ((__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1) || __unbuffered_p1_EAX == 2)))) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || (((0 <= x && x <= 2) && x <= 127) && ((x == 0 || x == 1) || x == 2)))) && (! multithreaded || z$flush_delayed == (_Bool)0)) && (! multithreaded || z$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p2_EAX && __unbuffered_p2_EAX <= 1) && (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1))) [2024-06-03 19:18:52,716 INFO L103 edCorrectnessWitness]: ghost_variable multithreaded = 0 [2024-06-03 19:18:52,717 INFO L106 edCorrectnessWitness]: ghost_update [L870-L870] multithreaded = 1; [2024-06-03 19:18:52,776 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-06-03 19:18:53,099 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-03 19:18:53,110 INFO L202 MainTranslator]: Completed pre-run Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local [2024-06-03 19:18:53,242 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-03 19:18:53,290 INFO L206 MainTranslator]: Completed translation [2024-06-03 19:18:53,291 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 03.06 07:18:53 WrapperNode [2024-06-03 19:18:53,291 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-06-03 19:18:53,292 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-06-03 19:18:53,292 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-06-03 19:18:53,292 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-06-03 19:18:53,298 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 03.06 07:18:53" (1/1) ... [2024-06-03 19:18:53,321 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 03.06 07:18:53" (1/1) ... [2024-06-03 19:18:53,347 INFO L138 Inliner]: procedures = 176, calls = 56, calls flagged for inlining = 6, calls inlined = 7, statements flattened = 162 [2024-06-03 19:18:53,347 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-06-03 19:18:53,348 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-06-03 19:18:53,348 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-06-03 19:18:53,348 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-06-03 19:18:53,367 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 03.06 07:18:53" (1/1) ... [2024-06-03 19:18:53,368 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 03.06 07:18:53" (1/1) ... [2024-06-03 19:18:53,371 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 03.06 07:18:53" (1/1) ... [2024-06-03 19:18:53,384 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]. [2024-06-03 19:18:53,391 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 03.06 07:18:53" (1/1) ... [2024-06-03 19:18:53,391 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 03.06 07:18:53" (1/1) ... [2024-06-03 19:18:53,402 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 03.06 07:18:53" (1/1) ... [2024-06-03 19:18:53,414 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 03.06 07:18:53" (1/1) ... [2024-06-03 19:18:53,415 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 03.06 07:18:53" (1/1) ... [2024-06-03 19:18:53,422 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 03.06 07:18:53" (1/1) ... [2024-06-03 19:18:53,425 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-06-03 19:18:53,426 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-06-03 19:18:53,428 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-06-03 19:18:53,428 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-06-03 19:18:53,428 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 03.06 07:18:53" (1/1) ... [2024-06-03 19:18:53,433 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-03 19:18:53,439 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-03 19:18:53,453 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) [2024-06-03 19:18:53,468 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 [2024-06-03 19:18:53,484 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-06-03 19:18:53,484 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-06-03 19:18:53,484 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2024-06-03 19:18:53,484 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2024-06-03 19:18:53,485 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2024-06-03 19:18:53,485 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2024-06-03 19:18:53,485 INFO L130 BoogieDeclarations]: Found specification of procedure P2 [2024-06-03 19:18:53,485 INFO L138 BoogieDeclarations]: Found implementation of procedure P2 [2024-06-03 19:18:53,485 INFO L130 BoogieDeclarations]: Found specification of procedure P3 [2024-06-03 19:18:53,485 INFO L138 BoogieDeclarations]: Found implementation of procedure P3 [2024-06-03 19:18:53,485 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-06-03 19:18:53,486 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-06-03 19:18:53,486 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-06-03 19:18:53,487 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-06-03 19:18:53,488 WARN L214 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2024-06-03 19:18:53,617 INFO L244 CfgBuilder]: Building ICFG [2024-06-03 19:18:53,619 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-06-03 19:18:53,952 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-06-03 19:18:53,957 INFO L293 CfgBuilder]: Performing block encoding [2024-06-03 19:18:54,078 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-06-03 19:18:54,078 INFO L320 CfgBuilder]: Removed 0 assume(true) statements. [2024-06-03 19:18:54,079 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.06 07:18:54 BoogieIcfgContainer [2024-06-03 19:18:54,079 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-06-03 19:18:54,080 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-06-03 19:18:54,080 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-06-03 19:18:54,083 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-06-03 19:18:54,083 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.06 07:18:52" (1/4) ... [2024-06-03 19:18:54,083 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@63db5ec and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.06 07:18:54, skipping insertion in model container [2024-06-03 19:18:54,083 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 03.06 07:18:52" (2/4) ... [2024-06-03 19:18:54,084 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@63db5ec and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 03.06 07:18:54, skipping insertion in model container [2024-06-03 19:18:54,084 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 03.06 07:18:53" (3/4) ... [2024-06-03 19:18:54,084 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@63db5ec and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 03.06 07:18:54, skipping insertion in model container [2024-06-03 19:18:54,084 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.06 07:18:54" (4/4) ... [2024-06-03 19:18:54,085 INFO L112 eAbstractionObserver]: Analyzing ICFG mix014.opt.i [2024-06-03 19:18:54,098 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-06-03 19:18:54,098 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 4 error locations. [2024-06-03 19:18:54,098 INFO L522 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-06-03 19:18:54,138 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-06-03 19:18:54,159 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 67 places, 54 transitions, 124 flow [2024-06-03 19:18:54,192 INFO L124 PetriNetUnfolderBase]: 0/50 cut-off events. [2024-06-03 19:18:54,193 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-03 19:18:54,195 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 5. Compared 91 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. [2024-06-03 19:18:54,195 INFO L82 GeneralOperation]: Start removeDead. Operand has 67 places, 54 transitions, 124 flow [2024-06-03 19:18:54,198 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 57 places, 44 transitions, 100 flow [2024-06-03 19:18:54,208 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-06-03 19:18:54,212 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;@279f702c, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-06-03 19:18:54,213 INFO L358 AbstractCegarLoop]: Starting to check reachability of 8 error locations. [2024-06-03 19:18:54,216 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-06-03 19:18:54,216 INFO L124 PetriNetUnfolderBase]: 0/6 cut-off events. [2024-06-03 19:18:54,216 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-03 19:18:54,217 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:18:54,217 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2024-06-03 19:18:54,217 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)] === [2024-06-03 19:18:54,222 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:18:54,222 INFO L85 PathProgramCache]: Analyzing trace with hash 255920879, now seen corresponding path program 1 times [2024-06-03 19:18:54,232 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:18:54,232 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1897751575] [2024-06-03 19:18:54,232 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:18:54,233 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:18:54,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:18:55,391 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:18:55,391 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:18:55,392 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1897751575] [2024-06-03 19:18:55,392 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1897751575] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:18:55,392 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:18:55,393 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-06-03 19:18:55,394 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [958193272] [2024-06-03 19:18:55,394 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:18:55,400 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-06-03 19:18:55,403 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:18:55,424 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-06-03 19:18:55,425 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-06-03 19:18:55,480 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 54 [2024-06-03 19:18:55,484 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 57 places, 44 transitions, 100 flow. Second operand has 3 states, 3 states have (on average 19.0) internal successors, (57), 3 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:18:55,484 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:18:55,484 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 54 [2024-06-03 19:18:55,485 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:18:56,598 INFO L124 PetriNetUnfolderBase]: 6201/8886 cut-off events. [2024-06-03 19:18:56,598 INFO L125 PetriNetUnfolderBase]: For 122/122 co-relation queries the response was YES. [2024-06-03 19:18:56,612 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17644 conditions, 8886 events. 6201/8886 cut-off events. For 122/122 co-relation queries the response was YES. Maximal size of possible extension queue 411. Compared 51694 event pairs, 4673 based on Foata normal form. 1/8595 useless extension candidates. Maximal degree in co-relation 17628. Up to 8487 conditions per place. [2024-06-03 19:18:56,647 INFO L140 encePairwiseOnDemand]: 45/54 looper letters, 43 selfloop transitions, 5 changer transitions 0/58 dead transitions. [2024-06-03 19:18:56,647 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 59 places, 58 transitions, 233 flow [2024-06-03 19:18:56,648 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-06-03 19:18:56,650 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-06-03 19:18:56,655 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 103 transitions. [2024-06-03 19:18:56,657 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6358024691358025 [2024-06-03 19:18:56,658 INFO L175 Difference]: Start difference. First operand has 57 places, 44 transitions, 100 flow. Second operand 3 states and 103 transitions. [2024-06-03 19:18:56,659 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 59 places, 58 transitions, 233 flow [2024-06-03 19:18:56,661 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 55 places, 58 transitions, 226 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-06-03 19:18:56,665 INFO L231 Difference]: Finished difference. Result has 56 places, 48 transitions, 135 flow [2024-06-03 19:18:56,667 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} [2024-06-03 19:18:56,670 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, -1 predicate places. [2024-06-03 19:18:56,670 INFO L495 AbstractCegarLoop]: Abstraction has has 56 places, 48 transitions, 135 flow [2024-06-03 19:18:56,670 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 19.0) internal successors, (57), 3 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:18:56,671 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:18:56,671 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:18:56,671 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-06-03 19:18:56,671 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)] === [2024-06-03 19:18:56,671 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:18:56,672 INFO L85 PathProgramCache]: Analyzing trace with hash 1126884046, now seen corresponding path program 1 times [2024-06-03 19:18:56,672 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:18:56,672 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1601579548] [2024-06-03 19:18:56,672 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:18:56,673 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:18:56,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:18:57,503 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:18:57,504 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:18:57,504 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1601579548] [2024-06-03 19:18:57,504 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1601579548] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:18:57,504 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:18:57,505 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-06-03 19:18:57,505 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [233337915] [2024-06-03 19:18:57,505 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:18:57,507 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-03 19:18:57,507 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:18:57,507 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-03 19:18:57,508 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-06-03 19:18:57,585 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 54 [2024-06-03 19:18:57,586 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 48 transitions, 135 flow. Second operand has 4 states, 4 states have (on average 17.75) internal successors, (71), 4 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:18:57,586 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:18:57,586 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 54 [2024-06-03 19:18:57,586 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:18:58,633 INFO L124 PetriNetUnfolderBase]: 7096/9901 cut-off events. [2024-06-03 19:18:58,633 INFO L125 PetriNetUnfolderBase]: For 2066/2066 co-relation queries the response was YES. [2024-06-03 19:18:58,644 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22641 conditions, 9901 events. 7096/9901 cut-off events. For 2066/2066 co-relation queries the response was YES. Maximal size of possible extension queue 458. Compared 55659 event pairs, 4749 based on Foata normal form. 4/9837 useless extension candidates. Maximal degree in co-relation 22626. Up to 9657 conditions per place. [2024-06-03 19:18:58,679 INFO L140 encePairwiseOnDemand]: 44/54 looper letters, 54 selfloop transitions, 9 changer transitions 0/72 dead transitions. [2024-06-03 19:18:58,679 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 59 places, 72 transitions, 327 flow [2024-06-03 19:18:58,680 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-03 19:18:58,680 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-03 19:18:58,681 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 131 transitions. [2024-06-03 19:18:58,681 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6064814814814815 [2024-06-03 19:18:58,681 INFO L175 Difference]: Start difference. First operand has 56 places, 48 transitions, 135 flow. Second operand 4 states and 131 transitions. [2024-06-03 19:18:58,681 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 59 places, 72 transitions, 327 flow [2024-06-03 19:18:58,682 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 58 places, 72 transitions, 322 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-06-03 19:18:58,683 INFO L231 Difference]: Finished difference. Result has 59 places, 52 transitions, 183 flow [2024-06-03 19:18:58,683 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} [2024-06-03 19:18:58,684 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 2 predicate places. [2024-06-03 19:18:58,684 INFO L495 AbstractCegarLoop]: Abstraction has has 59 places, 52 transitions, 183 flow [2024-06-03 19:18:58,684 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 17.75) internal successors, (71), 4 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:18:58,685 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:18:58,685 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:18:58,685 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-06-03 19:18:58,685 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)] === [2024-06-03 19:18:58,685 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:18:58,686 INFO L85 PathProgramCache]: Analyzing trace with hash 573668844, now seen corresponding path program 1 times [2024-06-03 19:18:58,686 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:18:58,686 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1552456700] [2024-06-03 19:18:58,686 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:18:58,686 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:18:58,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:18:59,533 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:18:59,533 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:18:59,533 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1552456700] [2024-06-03 19:18:59,534 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1552456700] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:18:59,534 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:18:59,534 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-03 19:18:59,534 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1789581823] [2024-06-03 19:18:59,534 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:18:59,535 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-03 19:18:59,535 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:18:59,535 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-03 19:18:59,535 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-03 19:18:59,590 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 54 [2024-06-03 19:18:59,591 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 59 places, 52 transitions, 183 flow. Second operand has 5 states, 5 states have (on average 16.6) internal successors, (83), 5 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:18:59,591 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:18:59,591 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 54 [2024-06-03 19:18:59,591 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:19:00,932 INFO L124 PetriNetUnfolderBase]: 9050/12584 cut-off events. [2024-06-03 19:19:00,932 INFO L125 PetriNetUnfolderBase]: For 7208/7208 co-relation queries the response was YES. [2024-06-03 19:19:00,961 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31841 conditions, 12584 events. 9050/12584 cut-off events. For 7208/7208 co-relation queries the response was YES. Maximal size of possible extension queue 496. Compared 69987 event pairs, 4826 based on Foata normal form. 7/12531 useless extension candidates. Maximal degree in co-relation 31824. Up to 12159 conditions per place. [2024-06-03 19:19:01,012 INFO L140 encePairwiseOnDemand]: 42/54 looper letters, 73 selfloop transitions, 21 changer transitions 0/102 dead transitions. [2024-06-03 19:19:01,012 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 63 places, 102 transitions, 545 flow [2024-06-03 19:19:01,013 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-03 19:19:01,013 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-03 19:19:01,017 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 167 transitions. [2024-06-03 19:19:01,018 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6185185185185185 [2024-06-03 19:19:01,018 INFO L175 Difference]: Start difference. First operand has 59 places, 52 transitions, 183 flow. Second operand 5 states and 167 transitions. [2024-06-03 19:19:01,018 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 63 places, 102 transitions, 545 flow [2024-06-03 19:19:01,023 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 61 places, 102 transitions, 526 flow, removed 3 selfloop flow, removed 2 redundant places. [2024-06-03 19:19:01,025 INFO L231 Difference]: Finished difference. Result has 64 places, 66 transitions, 314 flow [2024-06-03 19:19:01,025 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} [2024-06-03 19:19:01,026 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 7 predicate places. [2024-06-03 19:19:01,026 INFO L495 AbstractCegarLoop]: Abstraction has has 64 places, 66 transitions, 314 flow [2024-06-03 19:19:01,026 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 16.6) internal successors, (83), 5 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:19:01,026 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:19:01,026 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:19:01,027 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-06-03 19:19:01,027 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)] === [2024-06-03 19:19:01,027 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:19:01,027 INFO L85 PathProgramCache]: Analyzing trace with hash 1540003371, now seen corresponding path program 1 times [2024-06-03 19:19:01,027 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:19:01,028 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [38585241] [2024-06-03 19:19:01,028 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:19:01,028 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:19:01,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:19:02,019 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:19:02,019 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:19:02,019 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [38585241] [2024-06-03 19:19:02,020 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [38585241] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:19:02,020 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:19:02,020 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-03 19:19:02,020 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1983592051] [2024-06-03 19:19:02,020 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:19:02,021 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-03 19:19:02,021 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:19:02,021 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-03 19:19:02,021 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-03 19:19:02,090 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 54 [2024-06-03 19:19:02,091 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 64 places, 66 transitions, 314 flow. Second operand has 6 states, 6 states have (on average 16.5) internal successors, (99), 6 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:19:02,091 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:19:02,091 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 54 [2024-06-03 19:19:02,091 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:19:03,403 INFO L124 PetriNetUnfolderBase]: 9079/12628 cut-off events. [2024-06-03 19:19:03,403 INFO L125 PetriNetUnfolderBase]: For 17058/17063 co-relation queries the response was YES. [2024-06-03 19:19:03,420 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37336 conditions, 12628 events. 9079/12628 cut-off events. For 17058/17063 co-relation queries the response was YES. Maximal size of possible extension queue 496. Compared 70411 event pairs, 3910 based on Foata normal form. 18/12586 useless extension candidates. Maximal degree in co-relation 37316. Up to 12124 conditions per place. [2024-06-03 19:19:03,464 INFO L140 encePairwiseOnDemand]: 42/54 looper letters, 80 selfloop transitions, 25 changer transitions 0/113 dead transitions. [2024-06-03 19:19:03,464 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 68 places, 113 transitions, 690 flow [2024-06-03 19:19:03,465 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-03 19:19:03,465 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-03 19:19:03,466 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 193 transitions. [2024-06-03 19:19:03,466 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.595679012345679 [2024-06-03 19:19:03,466 INFO L175 Difference]: Start difference. First operand has 64 places, 66 transitions, 314 flow. Second operand 6 states and 193 transitions. [2024-06-03 19:19:03,466 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 68 places, 113 transitions, 690 flow [2024-06-03 19:19:03,475 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 68 places, 113 transitions, 678 flow, removed 6 selfloop flow, removed 0 redundant places. [2024-06-03 19:19:03,476 INFO L231 Difference]: Finished difference. Result has 69 places, 69 transitions, 391 flow [2024-06-03 19:19:03,476 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} [2024-06-03 19:19:03,477 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 12 predicate places. [2024-06-03 19:19:03,478 INFO L495 AbstractCegarLoop]: Abstraction has has 69 places, 69 transitions, 391 flow [2024-06-03 19:19:03,478 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 16.5) internal successors, (99), 6 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:19:03,478 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:19:03,478 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:19:03,478 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-06-03 19:19:03,478 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)] === [2024-06-03 19:19:03,479 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:19:03,479 INFO L85 PathProgramCache]: Analyzing trace with hash 361712804, now seen corresponding path program 1 times [2024-06-03 19:19:03,479 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:19:03,479 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [725810524] [2024-06-03 19:19:03,479 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:19:03,480 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:19:03,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:19:04,280 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:19:04,281 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:19:04,281 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [725810524] [2024-06-03 19:19:04,282 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [725810524] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:19:04,283 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:19:04,283 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-03 19:19:04,283 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1684781129] [2024-06-03 19:19:04,283 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:19:04,284 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-03 19:19:04,284 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:19:04,285 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-03 19:19:04,285 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-06-03 19:19:04,357 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 54 [2024-06-03 19:19:04,358 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 69 places, 69 transitions, 391 flow. Second operand has 6 states, 6 states have (on average 16.666666666666668) internal successors, (100), 6 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:19:04,358 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:19:04,358 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 54 [2024-06-03 19:19:04,358 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:19:05,655 INFO L124 PetriNetUnfolderBase]: 7920/11341 cut-off events. [2024-06-03 19:19:05,656 INFO L125 PetriNetUnfolderBase]: For 21902/21902 co-relation queries the response was YES. [2024-06-03 19:19:05,680 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36258 conditions, 11341 events. 7920/11341 cut-off events. For 21902/21902 co-relation queries the response was YES. Maximal size of possible extension queue 450. Compared 65689 event pairs, 4036 based on Foata normal form. 3/11168 useless extension candidates. Maximal degree in co-relation 36235. Up to 10775 conditions per place. [2024-06-03 19:19:05,720 INFO L140 encePairwiseOnDemand]: 44/54 looper letters, 67 selfloop transitions, 10 changer transitions 0/86 dead transitions. [2024-06-03 19:19:05,721 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 73 places, 86 transitions, 589 flow [2024-06-03 19:19:05,721 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-03 19:19:05,721 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-03 19:19:05,722 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 137 transitions. [2024-06-03 19:19:05,722 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5074074074074074 [2024-06-03 19:19:05,722 INFO L175 Difference]: Start difference. First operand has 69 places, 69 transitions, 391 flow. Second operand 5 states and 137 transitions. [2024-06-03 19:19:05,722 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 73 places, 86 transitions, 589 flow [2024-06-03 19:19:05,728 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 69 places, 86 transitions, 520 flow, removed 12 selfloop flow, removed 4 redundant places. [2024-06-03 19:19:05,730 INFO L231 Difference]: Finished difference. Result has 70 places, 69 transitions, 353 flow [2024-06-03 19:19:05,730 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} [2024-06-03 19:19:05,736 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 13 predicate places. [2024-06-03 19:19:05,736 INFO L495 AbstractCegarLoop]: Abstraction has has 70 places, 69 transitions, 353 flow [2024-06-03 19:19:05,737 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 16.666666666666668) internal successors, (100), 6 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:19:05,737 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:19:05,737 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:19:05,737 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-06-03 19:19:05,737 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)] === [2024-06-03 19:19:05,738 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:19:05,738 INFO L85 PathProgramCache]: Analyzing trace with hash -1696740822, now seen corresponding path program 1 times [2024-06-03 19:19:05,738 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:19:05,738 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1363878869] [2024-06-03 19:19:05,738 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:19:05,738 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:19:05,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:19:06,632 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:19:06,633 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:19:06,633 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1363878869] [2024-06-03 19:19:06,633 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1363878869] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:19:06,633 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:19:06,633 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-03 19:19:06,634 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [447814943] [2024-06-03 19:19:06,634 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:19:06,634 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-03 19:19:06,634 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:19:06,635 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-03 19:19:06,635 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-03 19:19:06,721 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 54 [2024-06-03 19:19:06,721 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 70 places, 69 transitions, 353 flow. Second operand has 7 states, 7 states have (on average 16.571428571428573) internal successors, (116), 7 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:19:06,721 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:19:06,721 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 54 [2024-06-03 19:19:06,721 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:19:08,059 INFO L124 PetriNetUnfolderBase]: 7911/11300 cut-off events. [2024-06-03 19:19:08,060 INFO L125 PetriNetUnfolderBase]: For 25135/25135 co-relation queries the response was YES. [2024-06-03 19:19:08,084 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36718 conditions, 11300 events. 7911/11300 cut-off events. For 25135/25135 co-relation queries the response was YES. Maximal size of possible extension queue 453. Compared 65075 event pairs, 3900 based on Foata normal form. 3/11140 useless extension candidates. Maximal degree in co-relation 36693. Up to 10748 conditions per place. [2024-06-03 19:19:08,124 INFO L140 encePairwiseOnDemand]: 43/54 looper letters, 74 selfloop transitions, 14 changer transitions 0/97 dead transitions. [2024-06-03 19:19:08,125 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 75 places, 97 transitions, 619 flow [2024-06-03 19:19:08,125 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-03 19:19:08,125 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-03 19:19:08,126 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 163 transitions. [2024-06-03 19:19:08,126 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5030864197530864 [2024-06-03 19:19:08,126 INFO L175 Difference]: Start difference. First operand has 70 places, 69 transitions, 353 flow. Second operand 6 states and 163 transitions. [2024-06-03 19:19:08,126 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 75 places, 97 transitions, 619 flow [2024-06-03 19:19:08,133 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 71 places, 97 transitions, 590 flow, removed 3 selfloop flow, removed 4 redundant places. [2024-06-03 19:19:08,134 INFO L231 Difference]: Finished difference. Result has 72 places, 73 transitions, 399 flow [2024-06-03 19:19:08,135 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} [2024-06-03 19:19:08,135 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 15 predicate places. [2024-06-03 19:19:08,135 INFO L495 AbstractCegarLoop]: Abstraction has has 72 places, 73 transitions, 399 flow [2024-06-03 19:19:08,136 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.571428571428573) internal successors, (116), 7 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:19:08,136 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:19:08,136 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:19:08,136 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-06-03 19:19:08,136 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)] === [2024-06-03 19:19:08,136 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:19:08,137 INFO L85 PathProgramCache]: Analyzing trace with hash -1065077663, now seen corresponding path program 1 times [2024-06-03 19:19:08,137 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:19:08,137 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [685898477] [2024-06-03 19:19:08,137 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:19:08,137 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:19:08,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:19:08,967 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:19:08,967 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:19:08,968 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [685898477] [2024-06-03 19:19:08,968 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [685898477] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:19:08,968 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:19:08,968 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-03 19:19:08,968 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [227407975] [2024-06-03 19:19:08,968 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:19:08,968 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-03 19:19:08,968 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:19:08,969 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-03 19:19:08,969 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-03 19:19:09,058 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 54 [2024-06-03 19:19:09,058 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 72 places, 73 transitions, 399 flow. Second operand has 7 states, 7 states have (on average 15.571428571428571) internal successors, (109), 7 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) [2024-06-03 19:19:09,058 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:19:09,058 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 54 [2024-06-03 19:19:09,059 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:19:10,469 INFO L124 PetriNetUnfolderBase]: 9074/12591 cut-off events. [2024-06-03 19:19:10,470 INFO L125 PetriNetUnfolderBase]: For 39963/40055 co-relation queries the response was YES. [2024-06-03 19:19:10,498 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44531 conditions, 12591 events. 9074/12591 cut-off events. For 39963/40055 co-relation queries the response was YES. Maximal size of possible extension queue 501. Compared 69872 event pairs, 4533 based on Foata normal form. 14/12562 useless extension candidates. Maximal degree in co-relation 44506. Up to 12190 conditions per place. [2024-06-03 19:19:10,546 INFO L140 encePairwiseOnDemand]: 42/54 looper letters, 74 selfloop transitions, 25 changer transitions 0/107 dead transitions. [2024-06-03 19:19:10,546 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 77 places, 107 transitions, 740 flow [2024-06-03 19:19:10,546 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-03 19:19:10,546 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-03 19:19:10,547 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 168 transitions. [2024-06-03 19:19:10,547 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5185185185185185 [2024-06-03 19:19:10,547 INFO L175 Difference]: Start difference. First operand has 72 places, 73 transitions, 399 flow. Second operand 6 states and 168 transitions. [2024-06-03 19:19:10,547 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 77 places, 107 transitions, 740 flow [2024-06-03 19:19:10,556 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 73 places, 107 transitions, 697 flow, removed 10 selfloop flow, removed 4 redundant places. [2024-06-03 19:19:10,558 INFO L231 Difference]: Finished difference. Result has 74 places, 77 transitions, 452 flow [2024-06-03 19:19:10,558 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} [2024-06-03 19:19:10,559 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 17 predicate places. [2024-06-03 19:19:10,559 INFO L495 AbstractCegarLoop]: Abstraction has has 74 places, 77 transitions, 452 flow [2024-06-03 19:19:10,559 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.571428571428571) internal successors, (109), 7 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) [2024-06-03 19:19:10,559 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:19:10,559 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:19:10,559 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-06-03 19:19:10,560 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)] === [2024-06-03 19:19:10,560 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:19:10,560 INFO L85 PathProgramCache]: Analyzing trace with hash -286287293, now seen corresponding path program 2 times [2024-06-03 19:19:10,560 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:19:10,560 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1428003624] [2024-06-03 19:19:10,560 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:19:10,561 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:19:10,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:19:11,365 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:19:11,366 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:19:11,366 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1428003624] [2024-06-03 19:19:11,366 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1428003624] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:19:11,366 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:19:11,366 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-03 19:19:11,366 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1825768468] [2024-06-03 19:19:11,366 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:19:11,366 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-03 19:19:11,366 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:19:11,367 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-03 19:19:11,367 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-03 19:19:11,425 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 54 [2024-06-03 19:19:11,426 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 74 places, 77 transitions, 452 flow. Second operand has 7 states, 7 states have (on average 15.571428571428571) internal successors, (109), 7 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) [2024-06-03 19:19:11,426 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:19:11,426 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 54 [2024-06-03 19:19:11,426 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:19:13,115 INFO L124 PetriNetUnfolderBase]: 9050/12543 cut-off events. [2024-06-03 19:19:13,115 INFO L125 PetriNetUnfolderBase]: For 46488/46576 co-relation queries the response was YES. [2024-06-03 19:19:13,163 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45480 conditions, 12543 events. 9050/12543 cut-off events. For 46488/46576 co-relation queries the response was YES. Maximal size of possible extension queue 501. Compared 69527 event pairs, 4553 based on Foata normal form. 4/12499 useless extension candidates. Maximal degree in co-relation 45454. Up to 12160 conditions per place. [2024-06-03 19:19:13,220 INFO L140 encePairwiseOnDemand]: 42/54 looper letters, 67 selfloop transitions, 26 changer transitions 0/101 dead transitions. [2024-06-03 19:19:13,221 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 79 places, 101 transitions, 700 flow [2024-06-03 19:19:13,221 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-03 19:19:13,221 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-03 19:19:13,222 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 163 transitions. [2024-06-03 19:19:13,222 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5030864197530864 [2024-06-03 19:19:13,222 INFO L175 Difference]: Start difference. First operand has 74 places, 77 transitions, 452 flow. Second operand 6 states and 163 transitions. [2024-06-03 19:19:13,222 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 79 places, 101 transitions, 700 flow [2024-06-03 19:19:13,237 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 76 places, 101 transitions, 657 flow, removed 7 selfloop flow, removed 3 redundant places. [2024-06-03 19:19:13,238 INFO L231 Difference]: Finished difference. Result has 77 places, 77 transitions, 472 flow [2024-06-03 19:19:13,238 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} [2024-06-03 19:19:13,239 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 20 predicate places. [2024-06-03 19:19:13,239 INFO L495 AbstractCegarLoop]: Abstraction has has 77 places, 77 transitions, 472 flow [2024-06-03 19:19:13,239 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.571428571428571) internal successors, (109), 7 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) [2024-06-03 19:19:13,240 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:19:13,240 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:19:13,240 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-06-03 19:19:13,240 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)] === [2024-06-03 19:19:13,240 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:19:13,240 INFO L85 PathProgramCache]: Analyzing trace with hash -264936853, now seen corresponding path program 1 times [2024-06-03 19:19:13,241 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:19:13,241 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1057315874] [2024-06-03 19:19:13,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:19:13,241 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:19:13,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:19:14,199 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:19:14,200 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:19:14,200 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1057315874] [2024-06-03 19:19:14,200 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1057315874] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:19:14,200 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:19:14,200 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 19:19:14,200 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [43773581] [2024-06-03 19:19:14,200 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:19:14,200 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 19:19:14,200 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:19:14,201 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 19:19:14,201 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2024-06-03 19:19:14,307 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 54 [2024-06-03 19:19:14,307 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 77 places, 77 transitions, 472 flow. Second operand has 8 states, 8 states have (on average 15.5) internal successors, (124), 8 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:19:14,307 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:19:14,307 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 54 [2024-06-03 19:19:14,307 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:19:15,826 INFO L124 PetriNetUnfolderBase]: 9316/13008 cut-off events. [2024-06-03 19:19:15,826 INFO L125 PetriNetUnfolderBase]: For 56145/56237 co-relation queries the response was YES. [2024-06-03 19:19:15,854 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48371 conditions, 13008 events. 9316/13008 cut-off events. For 56145/56237 co-relation queries the response was YES. Maximal size of possible extension queue 508. Compared 73318 event pairs, 4256 based on Foata normal form. 9/12974 useless extension candidates. Maximal degree in co-relation 48344. Up to 12249 conditions per place. [2024-06-03 19:19:15,902 INFO L140 encePairwiseOnDemand]: 38/54 looper letters, 100 selfloop transitions, 55 changer transitions 0/163 dead transitions. [2024-06-03 19:19:15,902 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 84 places, 163 transitions, 1334 flow [2024-06-03 19:19:15,904 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 19:19:15,904 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 19:19:15,905 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 228 transitions. [2024-06-03 19:19:15,905 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5277777777777778 [2024-06-03 19:19:15,906 INFO L175 Difference]: Start difference. First operand has 77 places, 77 transitions, 472 flow. Second operand 8 states and 228 transitions. [2024-06-03 19:19:15,906 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 84 places, 163 transitions, 1334 flow [2024-06-03 19:19:15,926 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 78 places, 163 transitions, 1171 flow, removed 8 selfloop flow, removed 6 redundant places. [2024-06-03 19:19:15,928 INFO L231 Difference]: Finished difference. Result has 82 places, 110 transitions, 793 flow [2024-06-03 19:19:15,929 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} [2024-06-03 19:19:15,929 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 25 predicate places. [2024-06-03 19:19:15,929 INFO L495 AbstractCegarLoop]: Abstraction has has 82 places, 110 transitions, 793 flow [2024-06-03 19:19:15,929 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.5) internal successors, (124), 8 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:19:15,930 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:19:15,930 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:19:15,930 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-06-03 19:19:15,930 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)] === [2024-06-03 19:19:15,930 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:19:15,930 INFO L85 PathProgramCache]: Analyzing trace with hash -1067156129, now seen corresponding path program 2 times [2024-06-03 19:19:15,930 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:19:15,931 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1734616866] [2024-06-03 19:19:15,931 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:19:15,931 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:19:15,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:19:16,889 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:19:16,889 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:19:16,889 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1734616866] [2024-06-03 19:19:16,889 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1734616866] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:19:16,889 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:19:16,889 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 19:19:16,889 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1330143544] [2024-06-03 19:19:16,890 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:19:16,890 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 19:19:16,890 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:19:16,890 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 19:19:16,890 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-03 19:19:16,982 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 54 [2024-06-03 19:19:16,983 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 82 places, 110 transitions, 793 flow. Second operand has 8 states, 8 states have (on average 15.5) internal successors, (124), 8 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:19:16,983 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:19:16,983 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 54 [2024-06-03 19:19:16,983 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:19:18,753 INFO L124 PetriNetUnfolderBase]: 9396/13180 cut-off events. [2024-06-03 19:19:18,753 INFO L125 PetriNetUnfolderBase]: For 72842/72995 co-relation queries the response was YES. [2024-06-03 19:19:18,782 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53352 conditions, 13180 events. 9396/13180 cut-off events. For 72842/72995 co-relation queries the response was YES. Maximal size of possible extension queue 508. Compared 74724 event pairs, 4279 based on Foata normal form. 38/13175 useless extension candidates. Maximal degree in co-relation 53321. Up to 12319 conditions per place. [2024-06-03 19:19:18,829 INFO L140 encePairwiseOnDemand]: 41/54 looper letters, 87 selfloop transitions, 65 changer transitions 0/160 dead transitions. [2024-06-03 19:19:18,830 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 88 places, 160 transitions, 1389 flow [2024-06-03 19:19:18,830 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 19:19:18,830 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 19:19:18,831 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 196 transitions. [2024-06-03 19:19:18,831 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5185185185185185 [2024-06-03 19:19:18,831 INFO L175 Difference]: Start difference. First operand has 82 places, 110 transitions, 793 flow. Second operand 7 states and 196 transitions. [2024-06-03 19:19:18,831 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 88 places, 160 transitions, 1389 flow [2024-06-03 19:19:18,867 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 86 places, 160 transitions, 1348 flow, removed 14 selfloop flow, removed 2 redundant places. [2024-06-03 19:19:18,869 INFO L231 Difference]: Finished difference. Result has 87 places, 119 transitions, 1002 flow [2024-06-03 19:19:18,870 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} [2024-06-03 19:19:18,871 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 30 predicate places. [2024-06-03 19:19:18,873 INFO L495 AbstractCegarLoop]: Abstraction has has 87 places, 119 transitions, 1002 flow [2024-06-03 19:19:18,873 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.5) internal successors, (124), 8 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:19:18,873 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:19:18,873 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:19:18,873 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-06-03 19:19:18,874 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)] === [2024-06-03 19:19:18,874 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:19:18,874 INFO L85 PathProgramCache]: Analyzing trace with hash -284969399, now seen corresponding path program 3 times [2024-06-03 19:19:18,874 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:19:18,874 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [785771136] [2024-06-03 19:19:18,874 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:19:18,875 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:19:18,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:19:19,779 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:19:19,779 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:19:19,780 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [785771136] [2024-06-03 19:19:19,780 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [785771136] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:19:19,780 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:19:19,780 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 19:19:19,785 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1340178021] [2024-06-03 19:19:19,786 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:19:19,786 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 19:19:19,787 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:19:19,788 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 19:19:19,788 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-03 19:19:19,916 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 54 [2024-06-03 19:19:19,917 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 87 places, 119 transitions, 1002 flow. Second operand has 8 states, 8 states have (on average 15.5) internal successors, (124), 8 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:19:19,917 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:19:19,917 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 54 [2024-06-03 19:19:19,917 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:19:21,788 INFO L124 PetriNetUnfolderBase]: 9436/13209 cut-off events. [2024-06-03 19:19:21,789 INFO L125 PetriNetUnfolderBase]: For 85853/86076 co-relation queries the response was YES. [2024-06-03 19:19:21,814 INFO L83 FinitePrefix]: Finished finitePrefix Result has 55871 conditions, 13209 events. 9436/13209 cut-off events. For 85853/86076 co-relation queries the response was YES. Maximal size of possible extension queue 508. Compared 74396 event pairs, 4289 based on Foata normal form. 82/13242 useless extension candidates. Maximal degree in co-relation 55838. Up to 12347 conditions per place. [2024-06-03 19:19:21,861 INFO L140 encePairwiseOnDemand]: 41/54 looper letters, 87 selfloop transitions, 79 changer transitions 0/174 dead transitions. [2024-06-03 19:19:21,861 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 93 places, 174 transitions, 1784 flow [2024-06-03 19:19:21,862 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 19:19:21,862 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 19:19:21,863 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 197 transitions. [2024-06-03 19:19:21,863 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5211640211640212 [2024-06-03 19:19:21,863 INFO L175 Difference]: Start difference. First operand has 87 places, 119 transitions, 1002 flow. Second operand 7 states and 197 transitions. [2024-06-03 19:19:21,863 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 93 places, 174 transitions, 1784 flow [2024-06-03 19:19:21,906 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 89 places, 174 transitions, 1615 flow, removed 38 selfloop flow, removed 4 redundant places. [2024-06-03 19:19:21,909 INFO L231 Difference]: Finished difference. Result has 90 places, 133 transitions, 1211 flow [2024-06-03 19:19:21,909 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} [2024-06-03 19:19:21,909 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 33 predicate places. [2024-06-03 19:19:21,909 INFO L495 AbstractCegarLoop]: Abstraction has has 90 places, 133 transitions, 1211 flow [2024-06-03 19:19:21,910 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.5) internal successors, (124), 8 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:19:21,910 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:19:21,910 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:19:21,910 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-06-03 19:19:21,910 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)] === [2024-06-03 19:19:21,910 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:19:21,910 INFO L85 PathProgramCache]: Analyzing trace with hash 1519701577, now seen corresponding path program 4 times [2024-06-03 19:19:21,911 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:19:21,911 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1175544738] [2024-06-03 19:19:21,911 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:19:21,911 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:19:21,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:19:22,848 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:19:22,848 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:19:22,848 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1175544738] [2024-06-03 19:19:22,848 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1175544738] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:19:22,848 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:19:22,848 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 19:19:22,849 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [392412717] [2024-06-03 19:19:22,849 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:19:22,849 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 19:19:22,849 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:19:22,849 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 19:19:22,849 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-03 19:19:22,952 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 54 [2024-06-03 19:19:22,953 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 90 places, 133 transitions, 1211 flow. Second operand has 8 states, 8 states have (on average 15.5) internal successors, (124), 8 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:19:22,953 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:19:22,953 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 54 [2024-06-03 19:19:22,953 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:19:24,586 INFO L124 PetriNetUnfolderBase]: 9420/13211 cut-off events. [2024-06-03 19:19:24,586 INFO L125 PetriNetUnfolderBase]: For 86557/86728 co-relation queries the response was YES. [2024-06-03 19:19:24,631 INFO L83 FinitePrefix]: Finished finitePrefix Result has 55643 conditions, 13211 events. 9420/13211 cut-off events. For 86557/86728 co-relation queries the response was YES. Maximal size of possible extension queue 508. Compared 74701 event pairs, 4277 based on Foata normal form. 82/13245 useless extension candidates. Maximal degree in co-relation 55609. Up to 12336 conditions per place. [2024-06-03 19:19:24,687 INFO L140 encePairwiseOnDemand]: 41/54 looper letters, 83 selfloop transitions, 81 changer transitions 0/172 dead transitions. [2024-06-03 19:19:24,687 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 96 places, 172 transitions, 1735 flow [2024-06-03 19:19:24,688 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 19:19:24,688 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 19:19:24,689 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 194 transitions. [2024-06-03 19:19:24,689 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5132275132275133 [2024-06-03 19:19:24,689 INFO L175 Difference]: Start difference. First operand has 90 places, 133 transitions, 1211 flow. Second operand 7 states and 194 transitions. [2024-06-03 19:19:24,689 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 96 places, 172 transitions, 1735 flow [2024-06-03 19:19:24,764 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 94 places, 172 transitions, 1604 flow, removed 46 selfloop flow, removed 2 redundant places. [2024-06-03 19:19:24,766 INFO L231 Difference]: Finished difference. Result has 95 places, 133 transitions, 1256 flow [2024-06-03 19:19:24,766 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} [2024-06-03 19:19:24,767 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 38 predicate places. [2024-06-03 19:19:24,767 INFO L495 AbstractCegarLoop]: Abstraction has has 95 places, 133 transitions, 1256 flow [2024-06-03 19:19:24,767 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.5) internal successors, (124), 8 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:19:24,767 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:19:24,767 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:19:24,767 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-06-03 19:19:24,767 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-03 19:19:24,768 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:19:24,768 INFO L85 PathProgramCache]: Analyzing trace with hash 54265413, now seen corresponding path program 1 times [2024-06-03 19:19:24,768 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:19:24,768 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2005491169] [2024-06-03 19:19:24,768 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:19:24,768 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:19:24,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:19:25,521 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:19:25,521 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:19:25,521 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2005491169] [2024-06-03 19:19:25,521 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2005491169] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:19:25,521 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:19:25,521 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-03 19:19:25,521 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [889864765] [2024-06-03 19:19:25,521 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:19:25,521 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-03 19:19:25,522 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:19:25,522 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-03 19:19:25,522 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-06-03 19:19:25,586 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 54 [2024-06-03 19:19:25,586 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 95 places, 133 transitions, 1256 flow. Second operand has 6 states, 6 states have (on average 17.166666666666668) internal successors, (103), 6 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:19:25,587 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:19:25,587 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 54 [2024-06-03 19:19:25,587 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:19:27,145 INFO L124 PetriNetUnfolderBase]: 9673/14031 cut-off events. [2024-06-03 19:19:27,145 INFO L125 PetriNetUnfolderBase]: For 96484/96515 co-relation queries the response was YES. [2024-06-03 19:19:27,206 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58301 conditions, 14031 events. 9673/14031 cut-off events. For 96484/96515 co-relation queries the response was YES. Maximal size of possible extension queue 503. Compared 82589 event pairs, 4590 based on Foata normal form. 20/14017 useless extension candidates. Maximal degree in co-relation 58264. Up to 13037 conditions per place. [2024-06-03 19:19:27,269 INFO L140 encePairwiseOnDemand]: 45/54 looper letters, 127 selfloop transitions, 10 changer transitions 0/152 dead transitions. [2024-06-03 19:19:27,269 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 99 places, 152 transitions, 1610 flow [2024-06-03 19:19:27,269 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-03 19:19:27,270 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-03 19:19:27,270 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 134 transitions. [2024-06-03 19:19:27,270 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4962962962962963 [2024-06-03 19:19:27,270 INFO L175 Difference]: Start difference. First operand has 95 places, 133 transitions, 1256 flow. Second operand 5 states and 134 transitions. [2024-06-03 19:19:27,270 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 99 places, 152 transitions, 1610 flow [2024-06-03 19:19:27,354 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 92 places, 152 transitions, 1403 flow, removed 5 selfloop flow, removed 7 redundant places. [2024-06-03 19:19:27,356 INFO L231 Difference]: Finished difference. Result has 93 places, 137 transitions, 1120 flow [2024-06-03 19:19:27,356 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=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=123, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1120, PETRI_PLACES=93, PETRI_TRANSITIONS=137} [2024-06-03 19:19:27,357 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 36 predicate places. [2024-06-03 19:19:27,357 INFO L495 AbstractCegarLoop]: Abstraction has has 93 places, 137 transitions, 1120 flow [2024-06-03 19:19:27,357 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 17.166666666666668) internal successors, (103), 6 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:19:27,357 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:19:27,357 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:19:27,357 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-06-03 19:19:27,358 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-03 19:19:27,358 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:19:27,358 INFO L85 PathProgramCache]: Analyzing trace with hash -1337350937, now seen corresponding path program 1 times [2024-06-03 19:19:27,358 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:19:27,358 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2013655664] [2024-06-03 19:19:27,358 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:19:27,358 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:19:27,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:19:28,443 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:19:28,443 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:19:28,443 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2013655664] [2024-06-03 19:19:28,443 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2013655664] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:19:28,444 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:19:28,444 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 19:19:28,444 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1392854639] [2024-06-03 19:19:28,444 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:19:28,444 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 19:19:28,444 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:19:28,445 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 19:19:28,445 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=43, Unknown=0, NotChecked=0, Total=72 [2024-06-03 19:19:28,546 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 54 [2024-06-03 19:19:28,546 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 93 places, 137 transitions, 1120 flow. Second operand has 9 states, 9 states have (on average 15.444444444444445) internal successors, (139), 9 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:19:28,546 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:19:28,546 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 54 [2024-06-03 19:19:28,546 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:19:30,308 INFO L124 PetriNetUnfolderBase]: 9450/13216 cut-off events. [2024-06-03 19:19:30,309 INFO L125 PetriNetUnfolderBase]: For 107786/107963 co-relation queries the response was YES. [2024-06-03 19:19:30,354 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58975 conditions, 13216 events. 9450/13216 cut-off events. For 107786/107963 co-relation queries the response was YES. Maximal size of possible extension queue 501. Compared 73600 event pairs, 4255 based on Foata normal form. 88/13275 useless extension candidates. Maximal degree in co-relation 58938. Up to 12364 conditions per place. [2024-06-03 19:19:30,411 INFO L140 encePairwiseOnDemand]: 41/54 looper letters, 101 selfloop transitions, 85 changer transitions 0/194 dead transitions. [2024-06-03 19:19:30,411 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 100 places, 194 transitions, 1842 flow [2024-06-03 19:19:30,412 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 19:19:30,412 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 19:19:30,412 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 221 transitions. [2024-06-03 19:19:30,413 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5115740740740741 [2024-06-03 19:19:30,413 INFO L175 Difference]: Start difference. First operand has 93 places, 137 transitions, 1120 flow. Second operand 8 states and 221 transitions. [2024-06-03 19:19:30,413 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 100 places, 194 transitions, 1842 flow [2024-06-03 19:19:30,473 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 97 places, 194 transitions, 1801 flow, removed 13 selfloop flow, removed 3 redundant places. [2024-06-03 19:19:30,475 INFO L231 Difference]: Finished difference. Result has 98 places, 145 transitions, 1377 flow [2024-06-03 19:19:30,476 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=1079, PETRI_DIFFERENCE_MINUEND_PLACES=90, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=137, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=77, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=60, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1377, PETRI_PLACES=98, PETRI_TRANSITIONS=145} [2024-06-03 19:19:30,476 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 41 predicate places. [2024-06-03 19:19:30,476 INFO L495 AbstractCegarLoop]: Abstraction has has 98 places, 145 transitions, 1377 flow [2024-06-03 19:19:30,477 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.444444444444445) internal successors, (139), 9 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:19:30,477 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:19:30,477 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:19:30,477 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-06-03 19:19:30,477 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)] === [2024-06-03 19:19:30,477 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:19:30,477 INFO L85 PathProgramCache]: Analyzing trace with hash -1337356517, now seen corresponding path program 2 times [2024-06-03 19:19:30,477 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:19:30,478 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2117588478] [2024-06-03 19:19:30,478 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:19:30,478 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:19:30,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:19:31,407 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:19:31,407 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:19:31,407 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2117588478] [2024-06-03 19:19:31,408 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2117588478] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:19:31,408 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:19:31,408 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 19:19:31,408 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [475316654] [2024-06-03 19:19:31,408 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:19:31,408 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 19:19:31,408 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:19:31,408 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 19:19:31,409 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-03 19:19:31,523 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 54 [2024-06-03 19:19:31,524 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 98 places, 145 transitions, 1377 flow. Second operand has 8 states, 8 states have (on average 15.625) internal successors, (125), 8 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:19:31,524 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:19:31,524 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 54 [2024-06-03 19:19:31,524 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:19:33,244 INFO L124 PetriNetUnfolderBase]: 9488/13277 cut-off events. [2024-06-03 19:19:33,245 INFO L125 PetriNetUnfolderBase]: For 122598/122774 co-relation queries the response was YES. [2024-06-03 19:19:33,287 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60847 conditions, 13277 events. 9488/13277 cut-off events. For 122598/122774 co-relation queries the response was YES. Maximal size of possible extension queue 501. Compared 74075 event pairs, 4270 based on Foata normal form. 96/13343 useless extension candidates. Maximal degree in co-relation 60809. Up to 12404 conditions per place. [2024-06-03 19:19:33,346 INFO L140 encePairwiseOnDemand]: 41/54 looper letters, 94 selfloop transitions, 94 changer transitions 0/196 dead transitions. [2024-06-03 19:19:33,347 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 104 places, 196 transitions, 2103 flow [2024-06-03 19:19:33,348 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 19:19:33,348 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 19:19:33,348 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 199 transitions. [2024-06-03 19:19:33,348 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5264550264550265 [2024-06-03 19:19:33,349 INFO L175 Difference]: Start difference. First operand has 98 places, 145 transitions, 1377 flow. Second operand 7 states and 199 transitions. [2024-06-03 19:19:33,349 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 104 places, 196 transitions, 2103 flow [2024-06-03 19:19:33,464 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 98 places, 196 transitions, 1869 flow, removed 24 selfloop flow, removed 6 redundant places. [2024-06-03 19:19:33,466 INFO L231 Difference]: Finished difference. Result has 99 places, 153 transitions, 1474 flow [2024-06-03 19:19:33,467 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=1159, PETRI_DIFFERENCE_MINUEND_PLACES=92, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=145, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=86, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=59, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1474, PETRI_PLACES=99, PETRI_TRANSITIONS=153} [2024-06-03 19:19:33,467 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 42 predicate places. [2024-06-03 19:19:33,467 INFO L495 AbstractCegarLoop]: Abstraction has has 99 places, 153 transitions, 1474 flow [2024-06-03 19:19:33,467 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.625) internal successors, (125), 8 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:19:33,467 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:19:33,467 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:19:33,468 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-06-03 19:19:33,468 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)] === [2024-06-03 19:19:33,468 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:19:33,468 INFO L85 PathProgramCache]: Analyzing trace with hash -236763221, now seen corresponding path program 3 times [2024-06-03 19:19:33,468 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:19:33,468 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1099642465] [2024-06-03 19:19:33,468 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:19:33,469 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:19:33,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:19:34,456 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:19:34,456 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:19:34,456 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1099642465] [2024-06-03 19:19:34,459 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1099642465] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:19:34,459 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:19:34,459 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 19:19:34,459 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [670587553] [2024-06-03 19:19:34,459 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:19:34,460 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 19:19:34,460 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:19:34,461 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 19:19:34,461 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2024-06-03 19:19:34,592 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 54 [2024-06-03 19:19:34,592 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 99 places, 153 transitions, 1474 flow. Second operand has 9 states, 9 states have (on average 15.444444444444445) internal successors, (139), 9 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:19:34,593 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:19:34,593 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 54 [2024-06-03 19:19:34,593 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:19:36,536 INFO L124 PetriNetUnfolderBase]: 9528/13355 cut-off events. [2024-06-03 19:19:36,537 INFO L125 PetriNetUnfolderBase]: For 136068/136301 co-relation queries the response was YES. [2024-06-03 19:19:36,586 INFO L83 FinitePrefix]: Finished finitePrefix Result has 62214 conditions, 13355 events. 9528/13355 cut-off events. For 136068/136301 co-relation queries the response was YES. Maximal size of possible extension queue 501. Compared 74718 event pairs, 4259 based on Foata normal form. 150/13471 useless extension candidates. Maximal degree in co-relation 62175. Up to 12446 conditions per place. [2024-06-03 19:19:36,644 INFO L140 encePairwiseOnDemand]: 41/54 looper letters, 104 selfloop transitions, 105 changer transitions 0/217 dead transitions. [2024-06-03 19:19:36,644 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 107 places, 217 transitions, 2302 flow [2024-06-03 19:19:36,645 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 19:19:36,645 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 19:19:36,646 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 244 transitions. [2024-06-03 19:19:36,646 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5020576131687243 [2024-06-03 19:19:36,646 INFO L175 Difference]: Start difference. First operand has 99 places, 153 transitions, 1474 flow. Second operand 9 states and 244 transitions. [2024-06-03 19:19:36,646 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 107 places, 217 transitions, 2302 flow [2024-06-03 19:19:36,744 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 102 places, 217 transitions, 2043 flow, removed 24 selfloop flow, removed 5 redundant places. [2024-06-03 19:19:36,747 INFO L231 Difference]: Finished difference. Result has 103 places, 161 transitions, 1568 flow [2024-06-03 19:19:36,747 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=1231, PETRI_DIFFERENCE_MINUEND_PLACES=94, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=153, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=97, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=56, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1568, PETRI_PLACES=103, PETRI_TRANSITIONS=161} [2024-06-03 19:19:36,747 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 46 predicate places. [2024-06-03 19:19:36,748 INFO L495 AbstractCegarLoop]: Abstraction has has 103 places, 161 transitions, 1568 flow [2024-06-03 19:19:36,748 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.444444444444445) internal successors, (139), 9 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:19:36,748 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:19:36,749 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:19:36,749 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-06-03 19:19:36,749 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)] === [2024-06-03 19:19:36,750 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:19:36,750 INFO L85 PathProgramCache]: Analyzing trace with hash -141241113, now seen corresponding path program 4 times [2024-06-03 19:19:36,750 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:19:36,750 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1170211130] [2024-06-03 19:19:36,750 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:19:36,750 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:19:36,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:19:37,760 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:19:37,761 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:19:37,761 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1170211130] [2024-06-03 19:19:37,761 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1170211130] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:19:37,761 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:19:37,761 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 19:19:37,761 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [300028685] [2024-06-03 19:19:37,762 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:19:37,762 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 19:19:37,762 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:19:37,763 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 19:19:37,763 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2024-06-03 19:19:37,864 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 54 [2024-06-03 19:19:37,864 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 103 places, 161 transitions, 1568 flow. Second operand has 9 states, 9 states have (on average 15.444444444444445) internal successors, (139), 9 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:19:37,865 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:19:37,865 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 54 [2024-06-03 19:19:37,865 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:19:39,682 INFO L124 PetriNetUnfolderBase]: 9512/13299 cut-off events. [2024-06-03 19:19:39,682 INFO L125 PetriNetUnfolderBase]: For 149020/149228 co-relation queries the response was YES. [2024-06-03 19:19:39,735 INFO L83 FinitePrefix]: Finished finitePrefix Result has 62963 conditions, 13299 events. 9512/13299 cut-off events. For 149020/149228 co-relation queries the response was YES. Maximal size of possible extension queue 501. Compared 73863 event pairs, 4282 based on Foata normal form. 110/13365 useless extension candidates. Maximal degree in co-relation 62924. Up to 12430 conditions per place. [2024-06-03 19:19:39,798 INFO L140 encePairwiseOnDemand]: 41/54 looper letters, 93 selfloop transitions, 103 changer transitions 0/204 dead transitions. [2024-06-03 19:19:39,798 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 110 places, 204 transitions, 2116 flow [2024-06-03 19:19:39,799 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 19:19:39,799 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 19:19:39,799 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 216 transitions. [2024-06-03 19:19:39,799 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5 [2024-06-03 19:19:39,800 INFO L175 Difference]: Start difference. First operand has 103 places, 161 transitions, 1568 flow. Second operand 8 states and 216 transitions. [2024-06-03 19:19:39,800 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 110 places, 204 transitions, 2116 flow [2024-06-03 19:19:39,915 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 103 places, 204 transitions, 1797 flow, removed 48 selfloop flow, removed 7 redundant places. [2024-06-03 19:19:39,917 INFO L231 Difference]: Finished difference. Result has 104 places, 161 transitions, 1470 flow [2024-06-03 19:19:39,917 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=1249, PETRI_DIFFERENCE_MINUEND_PLACES=96, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=161, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=103, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1470, PETRI_PLACES=104, PETRI_TRANSITIONS=161} [2024-06-03 19:19:39,918 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 47 predicate places. [2024-06-03 19:19:39,918 INFO L495 AbstractCegarLoop]: Abstraction has has 104 places, 161 transitions, 1470 flow [2024-06-03 19:19:39,918 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.444444444444445) internal successors, (139), 9 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:19:39,918 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:19:39,918 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:19:39,918 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-06-03 19:19:39,919 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)] === [2024-06-03 19:19:39,919 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:19:39,919 INFO L85 PathProgramCache]: Analyzing trace with hash -133612416, now seen corresponding path program 1 times [2024-06-03 19:19:39,919 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:19:39,919 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [180754634] [2024-06-03 19:19:39,919 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:19:39,919 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:19:39,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:19:40,941 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:19:40,942 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:19:40,942 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [180754634] [2024-06-03 19:19:40,942 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [180754634] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:19:40,942 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:19:40,942 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 19:19:40,942 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2092238402] [2024-06-03 19:19:40,942 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:19:40,942 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 19:19:40,942 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:19:40,943 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 19:19:40,943 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-03 19:19:41,067 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 54 [2024-06-03 19:19:41,067 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 104 places, 161 transitions, 1470 flow. Second operand has 9 states, 9 states have (on average 15.444444444444445) internal successors, (139), 9 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:19:41,067 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:19:41,067 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 54 [2024-06-03 19:19:41,068 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:19:43,044 INFO L124 PetriNetUnfolderBase]: 10339/14850 cut-off events. [2024-06-03 19:19:43,045 INFO L125 PetriNetUnfolderBase]: For 166991/166993 co-relation queries the response was YES. [2024-06-03 19:19:43,104 INFO L83 FinitePrefix]: Finished finitePrefix Result has 68614 conditions, 14850 events. 10339/14850 cut-off events. For 166991/166993 co-relation queries the response was YES. Maximal size of possible extension queue 505. Compared 85551 event pairs, 4590 based on Foata normal form. 6/14835 useless extension candidates. Maximal degree in co-relation 68574. Up to 13961 conditions per place. [2024-06-03 19:19:43,169 INFO L140 encePairwiseOnDemand]: 42/54 looper letters, 178 selfloop transitions, 21 changer transitions 0/207 dead transitions. [2024-06-03 19:19:43,169 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 111 places, 207 transitions, 2059 flow [2024-06-03 19:19:43,170 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 19:19:43,170 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 19:19:43,171 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 208 transitions. [2024-06-03 19:19:43,171 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48148148148148145 [2024-06-03 19:19:43,171 INFO L175 Difference]: Start difference. First operand has 104 places, 161 transitions, 1470 flow. Second operand 8 states and 208 transitions. [2024-06-03 19:19:43,171 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 111 places, 207 transitions, 2059 flow [2024-06-03 19:19:43,309 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 103 places, 207 transitions, 1777 flow, removed 0 selfloop flow, removed 8 redundant places. [2024-06-03 19:19:43,311 INFO L231 Difference]: Finished difference. Result has 105 places, 168 transitions, 1322 flow [2024-06-03 19:19:43,311 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=1195, PETRI_DIFFERENCE_MINUEND_PLACES=96, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=161, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=143, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1322, PETRI_PLACES=105, PETRI_TRANSITIONS=168} [2024-06-03 19:19:43,311 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 48 predicate places. [2024-06-03 19:19:43,312 INFO L495 AbstractCegarLoop]: Abstraction has has 105 places, 168 transitions, 1322 flow [2024-06-03 19:19:43,312 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.444444444444445) internal successors, (139), 9 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:19:43,312 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:19:43,312 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:19:43,312 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2024-06-03 19:19:43,312 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)] === [2024-06-03 19:19:43,313 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:19:43,313 INFO L85 PathProgramCache]: Analyzing trace with hash 1373469966, now seen corresponding path program 1 times [2024-06-03 19:19:43,313 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:19:43,313 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1405844473] [2024-06-03 19:19:43,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:19:43,313 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:19:43,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:19:44,202 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:19:44,202 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:19:44,202 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1405844473] [2024-06-03 19:19:44,202 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1405844473] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:19:44,202 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:19:44,203 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 19:19:44,203 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1231947107] [2024-06-03 19:19:44,203 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:19:44,204 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 19:19:44,205 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:19:44,205 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 19:19:44,205 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-03 19:19:44,295 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 54 [2024-06-03 19:19:44,296 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 105 places, 168 transitions, 1322 flow. Second operand has 8 states, 8 states have (on average 15.625) internal successors, (125), 8 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:19:44,296 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:19:44,296 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 54 [2024-06-03 19:19:44,296 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:19:46,293 INFO L124 PetriNetUnfolderBase]: 11229/15715 cut-off events. [2024-06-03 19:19:46,294 INFO L125 PetriNetUnfolderBase]: For 214947/215154 co-relation queries the response was YES. [2024-06-03 19:19:46,360 INFO L83 FinitePrefix]: Finished finitePrefix Result has 77063 conditions, 15715 events. 11229/15715 cut-off events. For 214947/215154 co-relation queries the response was YES. Maximal size of possible extension queue 582. Compared 89238 event pairs, 4210 based on Foata normal form. 26/15721 useless extension candidates. Maximal degree in co-relation 77021. Up to 14821 conditions per place. [2024-06-03 19:19:46,433 INFO L140 encePairwiseOnDemand]: 43/54 looper letters, 159 selfloop transitions, 46 changer transitions 0/214 dead transitions. [2024-06-03 19:19:46,434 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 111 places, 214 transitions, 2038 flow [2024-06-03 19:19:46,434 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 19:19:46,435 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 19:19:46,435 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 193 transitions. [2024-06-03 19:19:46,435 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5105820105820106 [2024-06-03 19:19:46,435 INFO L175 Difference]: Start difference. First operand has 105 places, 168 transitions, 1322 flow. Second operand 7 states and 193 transitions. [2024-06-03 19:19:46,436 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 111 places, 214 transitions, 2038 flow [2024-06-03 19:19:46,591 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 106 places, 214 transitions, 1968 flow, removed 17 selfloop flow, removed 5 redundant places. [2024-06-03 19:19:46,593 INFO L231 Difference]: Finished difference. Result has 107 places, 174 transitions, 1440 flow [2024-06-03 19:19:46,593 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=1252, PETRI_DIFFERENCE_MINUEND_PLACES=100, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=168, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=125, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1440, PETRI_PLACES=107, PETRI_TRANSITIONS=174} [2024-06-03 19:19:46,594 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 50 predicate places. [2024-06-03 19:19:46,594 INFO L495 AbstractCegarLoop]: Abstraction has has 107 places, 174 transitions, 1440 flow [2024-06-03 19:19:46,594 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.625) internal successors, (125), 8 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:19:46,594 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:19:46,594 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:19:46,594 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2024-06-03 19:19:46,594 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)] === [2024-06-03 19:19:46,595 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:19:46,595 INFO L85 PathProgramCache]: Analyzing trace with hash 962618584, now seen corresponding path program 2 times [2024-06-03 19:19:46,595 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:19:46,595 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [717664854] [2024-06-03 19:19:46,595 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:19:46,595 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:19:46,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:19:47,541 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:19:47,541 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:19:47,541 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [717664854] [2024-06-03 19:19:47,541 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [717664854] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:19:47,541 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:19:47,541 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 19:19:47,541 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [867724658] [2024-06-03 19:19:47,541 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:19:47,542 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 19:19:47,542 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:19:47,542 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 19:19:47,542 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-03 19:19:47,670 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 54 [2024-06-03 19:19:47,671 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 107 places, 174 transitions, 1440 flow. Second operand has 8 states, 8 states have (on average 15.625) internal successors, (125), 8 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:19:47,671 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:19:47,671 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 54 [2024-06-03 19:19:47,671 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:19:49,672 INFO L124 PetriNetUnfolderBase]: 11214/15675 cut-off events. [2024-06-03 19:19:49,672 INFO L125 PetriNetUnfolderBase]: For 242465/242658 co-relation queries the response was YES. [2024-06-03 19:19:49,735 INFO L83 FinitePrefix]: Finished finitePrefix Result has 79749 conditions, 15675 events. 11214/15675 cut-off events. For 242465/242658 co-relation queries the response was YES. Maximal size of possible extension queue 582. Compared 88937 event pairs, 4826 based on Foata normal form. 18/15669 useless extension candidates. Maximal degree in co-relation 79706. Up to 14936 conditions per place. [2024-06-03 19:19:49,808 INFO L140 encePairwiseOnDemand]: 42/54 looper letters, 158 selfloop transitions, 45 changer transitions 0/212 dead transitions. [2024-06-03 19:19:49,809 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 113 places, 212 transitions, 1976 flow [2024-06-03 19:19:49,809 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 19:19:49,809 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 19:19:49,810 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 190 transitions. [2024-06-03 19:19:49,810 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5026455026455027 [2024-06-03 19:19:49,810 INFO L175 Difference]: Start difference. First operand has 107 places, 174 transitions, 1440 flow. Second operand 7 states and 190 transitions. [2024-06-03 19:19:49,810 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 113 places, 212 transitions, 1976 flow [2024-06-03 19:19:49,974 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 110 places, 212 transitions, 1875 flow, removed 31 selfloop flow, removed 3 redundant places. [2024-06-03 19:19:49,977 INFO L231 Difference]: Finished difference. Result has 111 places, 174 transitions, 1441 flow [2024-06-03 19:19:49,977 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=1339, PETRI_DIFFERENCE_MINUEND_PLACES=104, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=174, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=45, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=129, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1441, PETRI_PLACES=111, PETRI_TRANSITIONS=174} [2024-06-03 19:19:49,977 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 54 predicate places. [2024-06-03 19:19:49,977 INFO L495 AbstractCegarLoop]: Abstraction has has 111 places, 174 transitions, 1441 flow [2024-06-03 19:19:49,977 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.625) internal successors, (125), 8 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:19:49,978 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:19:49,978 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:19:49,978 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2024-06-03 19:19:49,978 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)] === [2024-06-03 19:19:49,978 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:19:49,978 INFO L85 PathProgramCache]: Analyzing trace with hash 597113060, now seen corresponding path program 1 times [2024-06-03 19:19:49,978 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:19:49,979 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [338711286] [2024-06-03 19:19:49,979 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:19:49,979 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:19:49,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:19:50,822 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:19:50,822 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:19:50,822 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [338711286] [2024-06-03 19:19:50,822 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [338711286] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:19:50,822 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:19:50,822 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-03 19:19:50,822 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1371843497] [2024-06-03 19:19:50,823 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:19:50,823 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-03 19:19:50,823 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:19:50,823 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-03 19:19:50,823 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-03 19:19:50,911 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 54 [2024-06-03 19:19:50,912 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 111 places, 174 transitions, 1441 flow. Second operand has 7 states, 7 states have (on average 16.0) internal successors, (112), 7 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:19:50,912 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:19:50,912 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 54 [2024-06-03 19:19:50,912 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:19:52,846 INFO L124 PetriNetUnfolderBase]: 11228/15773 cut-off events. [2024-06-03 19:19:52,846 INFO L125 PetriNetUnfolderBase]: For 264113/264142 co-relation queries the response was YES. [2024-06-03 19:19:52,914 INFO L83 FinitePrefix]: Finished finitePrefix Result has 80680 conditions, 15773 events. 11228/15773 cut-off events. For 264113/264142 co-relation queries the response was YES. Maximal size of possible extension queue 544. Compared 88759 event pairs, 5060 based on Foata normal form. 20/15779 useless extension candidates. Maximal degree in co-relation 80635. Up to 15042 conditions per place. [2024-06-03 19:19:52,989 INFO L140 encePairwiseOnDemand]: 44/54 looper letters, 173 selfloop transitions, 24 changer transitions 0/213 dead transitions. [2024-06-03 19:19:52,989 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 116 places, 213 transitions, 2099 flow [2024-06-03 19:19:52,989 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-03 19:19:52,990 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-03 19:19:52,990 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 164 transitions. [2024-06-03 19:19:52,990 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5061728395061729 [2024-06-03 19:19:52,990 INFO L175 Difference]: Start difference. First operand has 111 places, 174 transitions, 1441 flow. Second operand 6 states and 164 transitions. [2024-06-03 19:19:52,990 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 116 places, 213 transitions, 2099 flow [2024-06-03 19:19:53,213 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 110 places, 213 transitions, 1997 flow, removed 3 selfloop flow, removed 6 redundant places. [2024-06-03 19:19:53,215 INFO L231 Difference]: Finished difference. Result has 111 places, 182 transitions, 1493 flow [2024-06-03 19:19:53,215 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=1339, PETRI_DIFFERENCE_MINUEND_PLACES=105, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=174, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=154, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1493, PETRI_PLACES=111, PETRI_TRANSITIONS=182} [2024-06-03 19:19:53,216 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 54 predicate places. [2024-06-03 19:19:53,216 INFO L495 AbstractCegarLoop]: Abstraction has has 111 places, 182 transitions, 1493 flow [2024-06-03 19:19:53,216 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.0) internal successors, (112), 7 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:19:53,216 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:19:53,216 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:19:53,216 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2024-06-03 19:19:53,217 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-03 19:19:53,217 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:19:53,217 INFO L85 PathProgramCache]: Analyzing trace with hash 1468367750, now seen corresponding path program 2 times [2024-06-03 19:19:53,217 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:19:53,217 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1192193444] [2024-06-03 19:19:53,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:19:53,217 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:19:53,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:19:53,995 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:19:53,995 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:19:53,996 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1192193444] [2024-06-03 19:19:53,996 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1192193444] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:19:53,996 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:19:53,996 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-03 19:19:53,996 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [174419644] [2024-06-03 19:19:53,996 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:19:53,997 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-03 19:19:53,998 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:19:53,998 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-03 19:19:53,998 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-03 19:19:54,079 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 54 [2024-06-03 19:19:54,080 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 111 places, 182 transitions, 1493 flow. Second operand has 7 states, 7 states have (on average 16.0) internal successors, (112), 7 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:19:54,080 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:19:54,080 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 54 [2024-06-03 19:19:54,080 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:19:55,984 INFO L124 PetriNetUnfolderBase]: 11214/15765 cut-off events. [2024-06-03 19:19:55,984 INFO L125 PetriNetUnfolderBase]: For 293709/293757 co-relation queries the response was YES. [2024-06-03 19:19:56,051 INFO L83 FinitePrefix]: Finished finitePrefix Result has 83894 conditions, 15765 events. 11214/15765 cut-off events. For 293709/293757 co-relation queries the response was YES. Maximal size of possible extension queue 544. Compared 88853 event pairs, 5047 based on Foata normal form. 31/15784 useless extension candidates. Maximal degree in co-relation 83848. Up to 15030 conditions per place. [2024-06-03 19:19:56,125 INFO L140 encePairwiseOnDemand]: 44/54 looper letters, 165 selfloop transitions, 24 changer transitions 0/205 dead transitions. [2024-06-03 19:19:56,125 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 116 places, 205 transitions, 1949 flow [2024-06-03 19:19:56,125 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-03 19:19:56,126 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-03 19:19:56,126 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 155 transitions. [2024-06-03 19:19:56,126 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4783950617283951 [2024-06-03 19:19:56,126 INFO L175 Difference]: Start difference. First operand has 111 places, 182 transitions, 1493 flow. Second operand 6 states and 155 transitions. [2024-06-03 19:19:56,126 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 116 places, 205 transitions, 1949 flow [2024-06-03 19:19:56,412 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 114 places, 205 transitions, 1881 flow, removed 29 selfloop flow, removed 2 redundant places. [2024-06-03 19:19:56,414 INFO L231 Difference]: Finished difference. Result has 115 places, 182 transitions, 1482 flow [2024-06-03 19:19:56,414 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=1425, PETRI_DIFFERENCE_MINUEND_PLACES=109, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=182, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=158, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1482, PETRI_PLACES=115, PETRI_TRANSITIONS=182} [2024-06-03 19:19:56,415 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 58 predicate places. [2024-06-03 19:19:56,415 INFO L495 AbstractCegarLoop]: Abstraction has has 115 places, 182 transitions, 1482 flow [2024-06-03 19:19:56,415 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.0) internal successors, (112), 7 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:19:56,415 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:19:56,415 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:19:56,415 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2024-06-03 19:19:56,416 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-03 19:19:56,416 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:19:56,416 INFO L85 PathProgramCache]: Analyzing trace with hash -316309394, now seen corresponding path program 1 times [2024-06-03 19:19:56,416 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:19:56,416 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1912163426] [2024-06-03 19:19:56,416 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:19:56,416 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:19:56,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:19:57,269 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:19:57,269 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:19:57,269 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1912163426] [2024-06-03 19:19:57,269 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1912163426] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:19:57,269 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:19:57,269 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-03 19:19:57,270 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [122246021] [2024-06-03 19:19:57,270 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:19:57,270 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-03 19:19:57,270 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:19:57,270 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-03 19:19:57,270 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-03 19:19:57,372 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 54 [2024-06-03 19:19:57,372 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 115 places, 182 transitions, 1482 flow. Second operand has 7 states, 7 states have (on average 16.0) internal successors, (112), 7 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:19:57,372 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:19:57,372 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 54 [2024-06-03 19:19:57,373 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:19:59,263 INFO L124 PetriNetUnfolderBase]: 10410/14925 cut-off events. [2024-06-03 19:19:59,263 INFO L125 PetriNetUnfolderBase]: For 274368/274370 co-relation queries the response was YES. [2024-06-03 19:19:59,330 INFO L83 FinitePrefix]: Finished finitePrefix Result has 78964 conditions, 14925 events. 10410/14925 cut-off events. For 274368/274370 co-relation queries the response was YES. Maximal size of possible extension queue 500. Compared 85660 event pairs, 4426 based on Foata normal form. 4/14897 useless extension candidates. Maximal degree in co-relation 78916. Up to 14053 conditions per place. [2024-06-03 19:19:59,400 INFO L140 encePairwiseOnDemand]: 44/54 looper letters, 187 selfloop transitions, 21 changer transitions 0/216 dead transitions. [2024-06-03 19:19:59,400 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 120 places, 216 transitions, 2154 flow [2024-06-03 19:19:59,400 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-03 19:19:59,400 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-03 19:19:59,401 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 161 transitions. [2024-06-03 19:19:59,401 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49691358024691357 [2024-06-03 19:19:59,401 INFO L175 Difference]: Start difference. First operand has 115 places, 182 transitions, 1482 flow. Second operand 6 states and 161 transitions. [2024-06-03 19:19:59,401 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 120 places, 216 transitions, 2154 flow [2024-06-03 19:19:59,712 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 115 places, 216 transitions, 2084 flow, removed 7 selfloop flow, removed 5 redundant places. [2024-06-03 19:19:59,714 INFO L231 Difference]: Finished difference. Result has 116 places, 190 transitions, 1567 flow [2024-06-03 19:19:59,715 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=1412, PETRI_DIFFERENCE_MINUEND_PLACES=110, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=182, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=165, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1567, PETRI_PLACES=116, PETRI_TRANSITIONS=190} [2024-06-03 19:19:59,715 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 59 predicate places. [2024-06-03 19:19:59,715 INFO L495 AbstractCegarLoop]: Abstraction has has 116 places, 190 transitions, 1567 flow [2024-06-03 19:19:59,715 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.0) internal successors, (112), 7 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:19:59,715 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:19:59,716 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:19:59,716 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2024-06-03 19:19:59,716 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-03 19:19:59,716 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:19:59,716 INFO L85 PathProgramCache]: Analyzing trace with hash 1468373702, now seen corresponding path program 2 times [2024-06-03 19:19:59,716 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:19:59,717 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [841154398] [2024-06-03 19:19:59,717 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:19:59,717 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:19:59,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:20:00,535 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:20:00,535 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:20:00,535 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [841154398] [2024-06-03 19:20:00,535 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [841154398] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:20:00,535 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:20:00,535 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-03 19:20:00,535 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1276869873] [2024-06-03 19:20:00,535 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:20:00,536 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-03 19:20:00,536 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:20:00,536 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-03 19:20:00,536 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-03 19:20:00,638 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 54 [2024-06-03 19:20:00,639 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 116 places, 190 transitions, 1567 flow. Second operand has 7 states, 7 states have (on average 16.0) internal successors, (112), 7 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:20:00,639 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:20:00,639 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 54 [2024-06-03 19:20:00,639 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:20:02,484 INFO L124 PetriNetUnfolderBase]: 10396/14909 cut-off events. [2024-06-03 19:20:02,484 INFO L125 PetriNetUnfolderBase]: For 302274/302281 co-relation queries the response was YES. [2024-06-03 19:20:02,550 INFO L83 FinitePrefix]: Finished finitePrefix Result has 81852 conditions, 14909 events. 10396/14909 cut-off events. For 302274/302281 co-relation queries the response was YES. Maximal size of possible extension queue 501. Compared 85614 event pairs, 4403 based on Foata normal form. 8/14889 useless extension candidates. Maximal degree in co-relation 81803. Up to 14041 conditions per place. [2024-06-03 19:20:02,620 INFO L140 encePairwiseOnDemand]: 44/54 looper letters, 181 selfloop transitions, 21 changer transitions 0/210 dead transitions. [2024-06-03 19:20:02,621 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 121 places, 210 transitions, 2031 flow [2024-06-03 19:20:02,621 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-03 19:20:02,621 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-03 19:20:02,622 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 155 transitions. [2024-06-03 19:20:02,622 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4783950617283951 [2024-06-03 19:20:02,622 INFO L175 Difference]: Start difference. First operand has 116 places, 190 transitions, 1567 flow. Second operand 6 states and 155 transitions. [2024-06-03 19:20:02,622 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 121 places, 210 transitions, 2031 flow [2024-06-03 19:20:02,931 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 119 places, 210 transitions, 1951 flow, removed 35 selfloop flow, removed 2 redundant places. [2024-06-03 19:20:02,933 INFO L231 Difference]: Finished difference. Result has 120 places, 190 transitions, 1538 flow [2024-06-03 19:20:02,933 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=1487, PETRI_DIFFERENCE_MINUEND_PLACES=114, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=190, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=169, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1538, PETRI_PLACES=120, PETRI_TRANSITIONS=190} [2024-06-03 19:20:02,934 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 63 predicate places. [2024-06-03 19:20:02,934 INFO L495 AbstractCegarLoop]: Abstraction has has 120 places, 190 transitions, 1538 flow [2024-06-03 19:20:02,934 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.0) internal successors, (112), 7 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:20:02,934 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:20:02,934 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:20:02,935 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2024-06-03 19:20:02,935 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-03 19:20:02,935 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:20:02,935 INFO L85 PathProgramCache]: Analyzing trace with hash -372101922, now seen corresponding path program 1 times [2024-06-03 19:20:02,935 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:20:02,935 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [629503253] [2024-06-03 19:20:02,935 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:20:02,936 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:20:02,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:20:03,978 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:20:03,978 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:20:03,979 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [629503253] [2024-06-03 19:20:03,979 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [629503253] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:20:03,979 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:20:03,979 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 19:20:03,979 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1440926932] [2024-06-03 19:20:03,979 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:20:03,979 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 19:20:03,979 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:20:03,980 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 19:20:03,980 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-03 19:20:04,074 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 54 [2024-06-03 19:20:04,075 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 120 places, 190 transitions, 1538 flow. Second operand has 9 states, 9 states have (on average 15.555555555555555) internal successors, (140), 9 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:20:04,075 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:20:04,075 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 54 [2024-06-03 19:20:04,075 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:20:06,212 INFO L124 PetriNetUnfolderBase]: 11524/16133 cut-off events. [2024-06-03 19:20:06,213 INFO L125 PetriNetUnfolderBase]: For 390272/390490 co-relation queries the response was YES. [2024-06-03 19:20:06,336 INFO L83 FinitePrefix]: Finished finitePrefix Result has 92095 conditions, 16133 events. 11524/16133 cut-off events. For 390272/390490 co-relation queries the response was YES. Maximal size of possible extension queue 586. Compared 92067 event pairs, 4119 based on Foata normal form. 63/16178 useless extension candidates. Maximal degree in co-relation 92044. Up to 14395 conditions per place. [2024-06-03 19:20:06,443 INFO L140 encePairwiseOnDemand]: 42/54 looper letters, 131 selfloop transitions, 106 changer transitions 0/246 dead transitions. [2024-06-03 19:20:06,443 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 127 places, 246 transitions, 2394 flow [2024-06-03 19:20:06,444 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 19:20:06,444 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 19:20:06,444 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 225 transitions. [2024-06-03 19:20:06,445 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5208333333333334 [2024-06-03 19:20:06,445 INFO L175 Difference]: Start difference. First operand has 120 places, 190 transitions, 1538 flow. Second operand 8 states and 225 transitions. [2024-06-03 19:20:06,445 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 127 places, 246 transitions, 2394 flow [2024-06-03 19:20:06,879 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 121 places, 246 transitions, 2327 flow, removed 6 selfloop flow, removed 6 redundant places. [2024-06-03 19:20:06,882 INFO L231 Difference]: Finished difference. Result has 122 places, 194 transitions, 1780 flow [2024-06-03 19:20:06,882 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=1471, PETRI_DIFFERENCE_MINUEND_PLACES=114, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=190, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=104, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=86, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1780, PETRI_PLACES=122, PETRI_TRANSITIONS=194} [2024-06-03 19:20:06,883 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 65 predicate places. [2024-06-03 19:20:06,883 INFO L495 AbstractCegarLoop]: Abstraction has has 122 places, 194 transitions, 1780 flow [2024-06-03 19:20:06,883 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.555555555555555) internal successors, (140), 9 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:20:06,883 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:20:06,883 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:20:06,883 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2024-06-03 19:20:06,884 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-03 19:20:06,884 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:20:06,884 INFO L85 PathProgramCache]: Analyzing trace with hash -283388292, now seen corresponding path program 2 times [2024-06-03 19:20:06,884 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:20:06,884 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [676650745] [2024-06-03 19:20:06,885 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:20:06,885 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:20:06,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:20:07,990 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:20:07,991 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:20:07,991 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [676650745] [2024-06-03 19:20:07,991 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [676650745] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:20:07,991 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:20:07,991 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 19:20:07,991 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1884023159] [2024-06-03 19:20:07,991 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:20:07,991 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 19:20:07,991 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:20:07,992 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 19:20:07,992 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-03 19:20:08,118 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 54 [2024-06-03 19:20:08,118 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 122 places, 194 transitions, 1780 flow. Second operand has 9 states, 9 states have (on average 15.555555555555555) internal successors, (140), 9 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:20:08,118 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:20:08,118 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 54 [2024-06-03 19:20:08,118 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:20:10,318 INFO L124 PetriNetUnfolderBase]: 11688/16445 cut-off events. [2024-06-03 19:20:10,319 INFO L125 PetriNetUnfolderBase]: For 431029/431247 co-relation queries the response was YES. [2024-06-03 19:20:10,405 INFO L83 FinitePrefix]: Finished finitePrefix Result has 96323 conditions, 16445 events. 11688/16445 cut-off events. For 431029/431247 co-relation queries the response was YES. Maximal size of possible extension queue 588. Compared 94782 event pairs, 4749 based on Foata normal form. 100/16516 useless extension candidates. Maximal degree in co-relation 96272. Up to 15189 conditions per place. [2024-06-03 19:20:10,490 INFO L140 encePairwiseOnDemand]: 41/54 looper letters, 129 selfloop transitions, 107 changer transitions 0/245 dead transitions. [2024-06-03 19:20:10,490 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 129 places, 245 transitions, 2474 flow [2024-06-03 19:20:10,491 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 19:20:10,491 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 19:20:10,491 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 221 transitions. [2024-06-03 19:20:10,492 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5115740740740741 [2024-06-03 19:20:10,492 INFO L175 Difference]: Start difference. First operand has 122 places, 194 transitions, 1780 flow. Second operand 8 states and 221 transitions. [2024-06-03 19:20:10,492 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 129 places, 245 transitions, 2474 flow [2024-06-03 19:20:10,812 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 125 places, 245 transitions, 2337 flow, removed 17 selfloop flow, removed 4 redundant places. [2024-06-03 19:20:10,815 INFO L231 Difference]: Finished difference. Result has 126 places, 197 transitions, 1934 flow [2024-06-03 19:20:10,815 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=1645, PETRI_DIFFERENCE_MINUEND_PLACES=118, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=194, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=104, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=87, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1934, PETRI_PLACES=126, PETRI_TRANSITIONS=197} [2024-06-03 19:20:10,816 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 69 predicate places. [2024-06-03 19:20:10,816 INFO L495 AbstractCegarLoop]: Abstraction has has 126 places, 197 transitions, 1934 flow [2024-06-03 19:20:10,816 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.555555555555555) internal successors, (140), 9 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:20:10,816 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:20:10,816 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:20:10,816 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2024-06-03 19:20:10,817 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-03 19:20:10,817 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:20:10,817 INFO L85 PathProgramCache]: Analyzing trace with hash -370227972, now seen corresponding path program 3 times [2024-06-03 19:20:10,817 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:20:10,817 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1187224817] [2024-06-03 19:20:10,817 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:20:10,817 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:20:10,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:20:11,774 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:20:11,774 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:20:11,774 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1187224817] [2024-06-03 19:20:11,775 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1187224817] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:20:11,775 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:20:11,775 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 19:20:11,775 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1394663054] [2024-06-03 19:20:11,775 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:20:11,775 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 19:20:11,776 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:20:11,776 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 19:20:11,776 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-03 19:20:11,868 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 54 [2024-06-03 19:20:11,868 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 126 places, 197 transitions, 1934 flow. Second operand has 9 states, 9 states have (on average 15.555555555555555) internal successors, (140), 9 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:20:11,868 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:20:11,868 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 54 [2024-06-03 19:20:11,868 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:20:14,149 INFO L124 PetriNetUnfolderBase]: 11840/16688 cut-off events. [2024-06-03 19:20:14,150 INFO L125 PetriNetUnfolderBase]: For 465491/465689 co-relation queries the response was YES. [2024-06-03 19:20:14,234 INFO L83 FinitePrefix]: Finished finitePrefix Result has 100100 conditions, 16688 events. 11840/16688 cut-off events. For 465491/465689 co-relation queries the response was YES. Maximal size of possible extension queue 592. Compared 96578 event pairs, 4563 based on Foata normal form. 90/16750 useless extension candidates. Maximal degree in co-relation 100047. Up to 15213 conditions per place. [2024-06-03 19:20:14,317 INFO L140 encePairwiseOnDemand]: 41/54 looper letters, 129 selfloop transitions, 110 changer transitions 0/248 dead transitions. [2024-06-03 19:20:14,317 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 133 places, 248 transitions, 2624 flow [2024-06-03 19:20:14,318 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 19:20:14,318 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 19:20:14,318 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 223 transitions. [2024-06-03 19:20:14,319 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5162037037037037 [2024-06-03 19:20:14,319 INFO L175 Difference]: Start difference. First operand has 126 places, 197 transitions, 1934 flow. Second operand 8 states and 223 transitions. [2024-06-03 19:20:14,319 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 133 places, 248 transitions, 2624 flow [2024-06-03 19:20:14,752 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 127 places, 248 transitions, 2387 flow, removed 16 selfloop flow, removed 6 redundant places. [2024-06-03 19:20:14,755 INFO L231 Difference]: Finished difference. Result has 128 places, 199 transitions, 1978 flow [2024-06-03 19:20:14,755 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=1697, PETRI_DIFFERENCE_MINUEND_PLACES=120, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=197, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=108, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=87, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1978, PETRI_PLACES=128, PETRI_TRANSITIONS=199} [2024-06-03 19:20:14,756 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 71 predicate places. [2024-06-03 19:20:14,756 INFO L495 AbstractCegarLoop]: Abstraction has has 128 places, 199 transitions, 1978 flow [2024-06-03 19:20:14,757 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.555555555555555) internal successors, (140), 9 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:20:14,757 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:20:14,757 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:20:14,757 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2024-06-03 19:20:14,757 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)] === [2024-06-03 19:20:14,757 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:20:14,757 INFO L85 PathProgramCache]: Analyzing trace with hash 634169614, now seen corresponding path program 1 times [2024-06-03 19:20:14,758 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:20:14,758 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1282101880] [2024-06-03 19:20:14,758 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:20:14,758 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:20:14,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:20:16,031 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:20:16,031 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:20:16,031 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1282101880] [2024-06-03 19:20:16,031 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1282101880] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:20:16,031 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:20:16,031 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 19:20:16,032 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [565941626] [2024-06-03 19:20:16,032 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:20:16,032 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 19:20:16,032 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:20:16,032 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 19:20:16,032 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2024-06-03 19:20:16,110 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 54 [2024-06-03 19:20:16,110 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 128 places, 199 transitions, 1978 flow. Second operand has 9 states, 9 states have (on average 14.666666666666666) internal successors, (132), 9 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:20:16,110 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:20:16,110 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 54 [2024-06-03 19:20:16,110 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:20:19,107 INFO L124 PetriNetUnfolderBase]: 12799/17967 cut-off events. [2024-06-03 19:20:19,107 INFO L125 PetriNetUnfolderBase]: For 504785/504810 co-relation queries the response was YES. [2024-06-03 19:20:19,173 INFO L83 FinitePrefix]: Finished finitePrefix Result has 107562 conditions, 17967 events. 12799/17967 cut-off events. For 504785/504810 co-relation queries the response was YES. Maximal size of possible extension queue 544. Compared 101541 event pairs, 4929 based on Foata normal form. 32/17967 useless extension candidates. Maximal degree in co-relation 107508. Up to 16617 conditions per place. [2024-06-03 19:20:19,251 INFO L140 encePairwiseOnDemand]: 41/54 looper letters, 195 selfloop transitions, 81 changer transitions 0/283 dead transitions. [2024-06-03 19:20:19,251 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 135 places, 283 transitions, 3465 flow [2024-06-03 19:20:19,252 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 19:20:19,252 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 19:20:19,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 211 transitions. [2024-06-03 19:20:19,252 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48842592592592593 [2024-06-03 19:20:19,252 INFO L175 Difference]: Start difference. First operand has 128 places, 199 transitions, 1978 flow. Second operand 8 states and 211 transitions. [2024-06-03 19:20:19,252 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 135 places, 283 transitions, 3465 flow [2024-06-03 19:20:19,692 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 129 places, 283 transitions, 3190 flow, removed 16 selfloop flow, removed 6 redundant places. [2024-06-03 19:20:19,697 INFO L231 Difference]: Finished difference. Result has 134 places, 235 transitions, 2419 flow [2024-06-03 19:20:19,698 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=1729, PETRI_DIFFERENCE_MINUEND_PLACES=122, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=199, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=49, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=141, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2419, PETRI_PLACES=134, PETRI_TRANSITIONS=235} [2024-06-03 19:20:19,702 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 77 predicate places. [2024-06-03 19:20:19,702 INFO L495 AbstractCegarLoop]: Abstraction has has 134 places, 235 transitions, 2419 flow [2024-06-03 19:20:19,703 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 14.666666666666666) internal successors, (132), 9 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:20:19,703 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:20:19,703 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:20:19,703 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2024-06-03 19:20:19,703 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)] === [2024-06-03 19:20:19,703 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:20:19,704 INFO L85 PathProgramCache]: Analyzing trace with hash -1004477188, now seen corresponding path program 4 times [2024-06-03 19:20:19,704 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:20:19,704 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [165815988] [2024-06-03 19:20:19,704 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:20:19,704 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:20:19,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:20:20,783 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:20:20,783 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:20:20,783 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [165815988] [2024-06-03 19:20:20,783 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [165815988] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:20:20,784 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:20:20,784 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 19:20:20,784 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1563709280] [2024-06-03 19:20:20,784 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:20:20,784 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 19:20:20,784 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:20:20,784 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 19:20:20,784 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-03 19:20:20,924 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 54 [2024-06-03 19:20:20,924 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 134 places, 235 transitions, 2419 flow. Second operand has 9 states, 9 states have (on average 15.555555555555555) internal successors, (140), 9 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:20:20,924 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:20:20,924 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 54 [2024-06-03 19:20:20,924 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:20:24,055 INFO L124 PetriNetUnfolderBase]: 12373/17517 cut-off events. [2024-06-03 19:20:24,056 INFO L125 PetriNetUnfolderBase]: For 562957/563191 co-relation queries the response was YES. [2024-06-03 19:20:24,134 INFO L83 FinitePrefix]: Finished finitePrefix Result has 112146 conditions, 17517 events. 12373/17517 cut-off events. For 562957/563191 co-relation queries the response was YES. Maximal size of possible extension queue 585. Compared 102334 event pairs, 4204 based on Foata normal form. 172/17655 useless extension candidates. Maximal degree in co-relation 112087. Up to 15784 conditions per place. [2024-06-03 19:20:24,215 INFO L140 encePairwiseOnDemand]: 41/54 looper letters, 161 selfloop transitions, 123 changer transitions 0/293 dead transitions. [2024-06-03 19:20:24,216 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 141 places, 293 transitions, 3425 flow [2024-06-03 19:20:24,216 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 19:20:24,217 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 19:20:24,217 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 229 transitions. [2024-06-03 19:20:24,217 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5300925925925926 [2024-06-03 19:20:24,217 INFO L175 Difference]: Start difference. First operand has 134 places, 235 transitions, 2419 flow. Second operand 8 states and 229 transitions. [2024-06-03 19:20:24,217 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 141 places, 293 transitions, 3425 flow [2024-06-03 19:20:24,671 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 140 places, 293 transitions, 3351 flow, removed 36 selfloop flow, removed 1 redundant places. [2024-06-03 19:20:24,674 INFO L231 Difference]: Finished difference. Result has 141 places, 239 transitions, 2708 flow [2024-06-03 19:20:24,674 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=2345, PETRI_DIFFERENCE_MINUEND_PLACES=133, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=235, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=121, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=114, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2708, PETRI_PLACES=141, PETRI_TRANSITIONS=239} [2024-06-03 19:20:24,676 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 84 predicate places. [2024-06-03 19:20:24,676 INFO L495 AbstractCegarLoop]: Abstraction has has 141 places, 239 transitions, 2708 flow [2024-06-03 19:20:24,676 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.555555555555555) internal successors, (140), 9 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:20:24,676 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:20:24,676 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:20:24,676 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2024-06-03 19:20:24,676 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)] === [2024-06-03 19:20:24,677 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:20:24,677 INFO L85 PathProgramCache]: Analyzing trace with hash -1004329318, now seen corresponding path program 5 times [2024-06-03 19:20:24,677 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:20:24,677 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [668406945] [2024-06-03 19:20:24,677 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:20:24,677 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:20:24,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:20:25,719 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:20:25,720 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:20:25,720 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [668406945] [2024-06-03 19:20:25,720 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [668406945] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:20:25,720 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:20:25,720 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 19:20:25,720 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1119992299] [2024-06-03 19:20:25,720 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:20:25,720 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 19:20:25,720 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:20:25,721 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 19:20:25,721 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-03 19:20:25,847 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 54 [2024-06-03 19:20:25,847 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 141 places, 239 transitions, 2708 flow. Second operand has 9 states, 9 states have (on average 15.555555555555555) internal successors, (140), 9 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:20:25,847 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:20:25,847 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 54 [2024-06-03 19:20:25,847 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:20:29,217 INFO L124 PetriNetUnfolderBase]: 12612/17909 cut-off events. [2024-06-03 19:20:29,218 INFO L125 PetriNetUnfolderBase]: For 609850/610023 co-relation queries the response was YES. [2024-06-03 19:20:29,305 INFO L83 FinitePrefix]: Finished finitePrefix Result has 116390 conditions, 17909 events. 12612/17909 cut-off events. For 609850/610023 co-relation queries the response was YES. Maximal size of possible extension queue 589. Compared 105360 event pairs, 4567 based on Foata normal form. 159/18048 useless extension candidates. Maximal degree in co-relation 116328. Up to 16448 conditions per place. [2024-06-03 19:20:29,392 INFO L140 encePairwiseOnDemand]: 41/54 looper letters, 163 selfloop transitions, 119 changer transitions 0/291 dead transitions. [2024-06-03 19:20:29,392 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 148 places, 291 transitions, 3508 flow [2024-06-03 19:20:29,393 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 19:20:29,393 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 19:20:29,393 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 223 transitions. [2024-06-03 19:20:29,393 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5162037037037037 [2024-06-03 19:20:29,393 INFO L175 Difference]: Start difference. First operand has 141 places, 239 transitions, 2708 flow. Second operand 8 states and 223 transitions. [2024-06-03 19:20:29,394 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 148 places, 291 transitions, 3508 flow [2024-06-03 19:20:29,870 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 144 places, 291 transitions, 3334 flow, removed 20 selfloop flow, removed 4 redundant places. [2024-06-03 19:20:29,873 INFO L231 Difference]: Finished difference. Result has 145 places, 241 transitions, 2844 flow [2024-06-03 19:20:29,873 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=2536, PETRI_DIFFERENCE_MINUEND_PLACES=137, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=239, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=117, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=120, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2844, PETRI_PLACES=145, PETRI_TRANSITIONS=241} [2024-06-03 19:20:29,873 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 88 predicate places. [2024-06-03 19:20:29,874 INFO L495 AbstractCegarLoop]: Abstraction has has 145 places, 241 transitions, 2844 flow [2024-06-03 19:20:29,874 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.555555555555555) internal successors, (140), 9 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:20:29,874 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:20:29,874 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:20:29,874 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2024-06-03 19:20:29,874 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-03 19:20:29,875 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:20:29,875 INFO L85 PathProgramCache]: Analyzing trace with hash -852331842, now seen corresponding path program 6 times [2024-06-03 19:20:29,875 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:20:29,875 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1129969229] [2024-06-03 19:20:29,875 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:20:29,875 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:20:29,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:20:31,346 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:20:31,346 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:20:31,346 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1129969229] [2024-06-03 19:20:31,347 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1129969229] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:20:31,347 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:20:31,347 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 19:20:31,347 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [15092515] [2024-06-03 19:20:31,347 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:20:31,347 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 19:20:31,348 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:20:31,348 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 19:20:31,348 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=59, Unknown=0, NotChecked=0, Total=90 [2024-06-03 19:20:31,474 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 54 [2024-06-03 19:20:31,474 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 145 places, 241 transitions, 2844 flow. Second operand has 10 states, 10 states have (on average 15.4) internal successors, (154), 10 states have internal predecessors, (154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:20:31,474 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:20:31,475 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 54 [2024-06-03 19:20:31,475 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:20:34,780 INFO L124 PetriNetUnfolderBase]: 12718/18061 cut-off events. [2024-06-03 19:20:34,780 INFO L125 PetriNetUnfolderBase]: For 647684/647832 co-relation queries the response was YES. [2024-06-03 19:20:34,879 INFO L83 FinitePrefix]: Finished finitePrefix Result has 119228 conditions, 18061 events. 12718/18061 cut-off events. For 647684/647832 co-relation queries the response was YES. Maximal size of possible extension queue 592. Compared 106474 event pairs, 4586 based on Foata normal form. 118/18163 useless extension candidates. Maximal degree in co-relation 119164. Up to 16618 conditions per place. [2024-06-03 19:20:34,987 INFO L140 encePairwiseOnDemand]: 41/54 looper letters, 173 selfloop transitions, 117 changer transitions 0/299 dead transitions. [2024-06-03 19:20:34,988 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 153 places, 299 transitions, 3680 flow [2024-06-03 19:20:34,988 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 19:20:34,989 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 19:20:34,989 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 245 transitions. [2024-06-03 19:20:34,989 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5041152263374485 [2024-06-03 19:20:34,989 INFO L175 Difference]: Start difference. First operand has 145 places, 241 transitions, 2844 flow. Second operand 9 states and 245 transitions. [2024-06-03 19:20:34,989 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 153 places, 299 transitions, 3680 flow [2024-06-03 19:20:35,579 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 147 places, 299 transitions, 3418 flow, removed 15 selfloop flow, removed 6 redundant places. [2024-06-03 19:20:35,582 INFO L231 Difference]: Finished difference. Result has 148 places, 243 transitions, 2890 flow [2024-06-03 19:20:35,583 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=2582, PETRI_DIFFERENCE_MINUEND_PLACES=139, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=241, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=115, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=124, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2890, PETRI_PLACES=148, PETRI_TRANSITIONS=243} [2024-06-03 19:20:35,583 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 91 predicate places. [2024-06-03 19:20:35,583 INFO L495 AbstractCegarLoop]: Abstraction has has 148 places, 243 transitions, 2890 flow [2024-06-03 19:20:35,584 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 15.4) internal successors, (154), 10 states have internal predecessors, (154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:20:35,584 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:20:35,584 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:20:35,584 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2024-06-03 19:20:35,584 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-03 19:20:35,584 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:20:35,585 INFO L85 PathProgramCache]: Analyzing trace with hash 634497904, now seen corresponding path program 2 times [2024-06-03 19:20:35,585 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:20:35,585 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [800426386] [2024-06-03 19:20:35,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:20:35,585 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:20:35,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:20:36,887 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:20:36,887 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:20:36,887 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [800426386] [2024-06-03 19:20:36,887 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [800426386] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:20:36,887 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:20:36,887 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 19:20:36,887 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1446070959] [2024-06-03 19:20:36,888 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:20:36,888 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 19:20:36,888 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:20:36,888 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 19:20:36,888 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2024-06-03 19:20:36,994 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 54 [2024-06-03 19:20:36,994 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 148 places, 243 transitions, 2890 flow. Second operand has 9 states, 9 states have (on average 14.666666666666666) internal successors, (132), 9 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:20:36,994 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:20:36,994 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 54 [2024-06-03 19:20:36,994 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:20:40,331 INFO L124 PetriNetUnfolderBase]: 13552/19118 cut-off events. [2024-06-03 19:20:40,331 INFO L125 PetriNetUnfolderBase]: For 684800/684819 co-relation queries the response was YES. [2024-06-03 19:20:40,419 INFO L83 FinitePrefix]: Finished finitePrefix Result has 125351 conditions, 19118 events. 13552/19118 cut-off events. For 684800/684819 co-relation queries the response was YES. Maximal size of possible extension queue 554. Compared 109857 event pairs, 5110 based on Foata normal form. 26/19112 useless extension candidates. Maximal degree in co-relation 125286. Up to 17622 conditions per place. [2024-06-03 19:20:40,506 INFO L140 encePairwiseOnDemand]: 41/54 looper letters, 201 selfloop transitions, 88 changer transitions 0/296 dead transitions. [2024-06-03 19:20:40,506 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 155 places, 296 transitions, 4163 flow [2024-06-03 19:20:40,507 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 19:20:40,507 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 19:20:40,507 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 207 transitions. [2024-06-03 19:20:40,507 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4791666666666667 [2024-06-03 19:20:40,508 INFO L175 Difference]: Start difference. First operand has 148 places, 243 transitions, 2890 flow. Second operand 8 states and 207 transitions. [2024-06-03 19:20:40,508 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 155 places, 296 transitions, 4163 flow [2024-06-03 19:20:41,103 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 148 places, 296 transitions, 3895 flow, removed 17 selfloop flow, removed 7 redundant places. [2024-06-03 19:20:41,107 INFO L231 Difference]: Finished difference. Result has 151 places, 255 transitions, 3053 flow [2024-06-03 19:20:41,107 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=2628, PETRI_DIFFERENCE_MINUEND_PLACES=141, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=243, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=76, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=163, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3053, PETRI_PLACES=151, PETRI_TRANSITIONS=255} [2024-06-03 19:20:41,107 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 94 predicate places. [2024-06-03 19:20:41,107 INFO L495 AbstractCegarLoop]: Abstraction has has 151 places, 255 transitions, 3053 flow [2024-06-03 19:20:41,108 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 14.666666666666666) internal successors, (132), 9 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:20:41,108 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:20:41,108 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:20:41,108 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2024-06-03 19:20:41,108 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)] === [2024-06-03 19:20:41,108 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:20:41,108 INFO L85 PathProgramCache]: Analyzing trace with hash 1628872264, now seen corresponding path program 7 times [2024-06-03 19:20:41,109 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:20:41,109 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [825105221] [2024-06-03 19:20:41,109 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:20:41,109 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:20:41,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:20:42,258 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:20:42,259 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:20:42,259 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [825105221] [2024-06-03 19:20:42,259 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [825105221] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:20:42,259 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:20:42,259 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 19:20:42,259 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1262802162] [2024-06-03 19:20:42,259 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:20:42,260 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 19:20:42,260 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:20:42,260 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 19:20:42,260 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-03 19:20:42,404 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 54 [2024-06-03 19:20:42,405 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 151 places, 255 transitions, 3053 flow. Second operand has 10 states, 10 states have (on average 15.4) internal successors, (154), 10 states have internal predecessors, (154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:20:42,405 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:20:42,405 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 54 [2024-06-03 19:20:42,405 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:20:45,977 INFO L124 PetriNetUnfolderBase]: 12923/18317 cut-off events. [2024-06-03 19:20:45,978 INFO L125 PetriNetUnfolderBase]: For 721736/721894 co-relation queries the response was YES. [2024-06-03 19:20:46,067 INFO L83 FinitePrefix]: Finished finitePrefix Result has 123434 conditions, 18317 events. 12923/18317 cut-off events. For 721736/721894 co-relation queries the response was YES. Maximal size of possible extension queue 592. Compared 107976 event pairs, 4940 based on Foata normal form. 118/18400 useless extension candidates. Maximal degree in co-relation 123366. Up to 16939 conditions per place. [2024-06-03 19:20:46,155 INFO L140 encePairwiseOnDemand]: 41/54 looper letters, 182 selfloop transitions, 119 changer transitions 0/310 dead transitions. [2024-06-03 19:20:46,156 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 159 places, 310 transitions, 3909 flow [2024-06-03 19:20:46,157 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 19:20:46,157 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 19:20:46,158 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 243 transitions. [2024-06-03 19:20:46,159 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5 [2024-06-03 19:20:46,159 INFO L175 Difference]: Start difference. First operand has 151 places, 255 transitions, 3053 flow. Second operand 9 states and 243 transitions. [2024-06-03 19:20:46,160 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 159 places, 310 transitions, 3909 flow [2024-06-03 19:20:46,900 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 156 places, 310 transitions, 3775 flow, removed 30 selfloop flow, removed 3 redundant places. [2024-06-03 19:20:46,903 INFO L231 Difference]: Finished difference. Result has 157 places, 257 transitions, 3235 flow [2024-06-03 19:20:46,904 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=2919, PETRI_DIFFERENCE_MINUEND_PLACES=148, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=255, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=117, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=136, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3235, PETRI_PLACES=157, PETRI_TRANSITIONS=257} [2024-06-03 19:20:46,904 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 100 predicate places. [2024-06-03 19:20:46,904 INFO L495 AbstractCegarLoop]: Abstraction has has 157 places, 257 transitions, 3235 flow [2024-06-03 19:20:46,904 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 15.4) internal successors, (154), 10 states have internal predecessors, (154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:20:46,904 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:20:46,905 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:20:46,905 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2024-06-03 19:20:46,905 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)] === [2024-06-03 19:20:46,905 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:20:46,905 INFO L85 PathProgramCache]: Analyzing trace with hash 624538108, now seen corresponding path program 8 times [2024-06-03 19:20:46,905 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:20:46,905 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [491824684] [2024-06-03 19:20:46,906 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:20:46,906 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:20:46,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:20:48,173 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:20:48,174 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:20:48,174 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [491824684] [2024-06-03 19:20:48,174 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [491824684] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:20:48,174 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:20:48,174 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 19:20:48,174 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1781034265] [2024-06-03 19:20:48,174 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:20:48,176 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 19:20:48,177 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:20:48,177 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 19:20:48,178 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2024-06-03 19:20:48,300 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 54 [2024-06-03 19:20:48,300 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 157 places, 257 transitions, 3235 flow. Second operand has 10 states, 10 states have (on average 15.4) internal successors, (154), 10 states have internal predecessors, (154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:20:48,300 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:20:48,301 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 54 [2024-06-03 19:20:48,301 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand