./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/pthread-wmm/safe000_rmo.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/safe000_rmo.yml/witness.yml --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 76401ed0 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/safe000_rmo.i ./goblint.2024-05-21_14-57-05.files/protection/safe000_rmo.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-76401ed-m [2024-06-20 16:42:36,022 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-06-20 16:42:36,091 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-06-20 16:42:36,095 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-06-20 16:42:36,095 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-06-20 16:42:36,117 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-06-20 16:42:36,118 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-06-20 16:42:36,118 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-06-20 16:42:36,119 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-06-20 16:42:36,122 INFO L153 SettingsManager]: * Use memory slicer=true [2024-06-20 16:42:36,122 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-06-20 16:42:36,122 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-06-20 16:42:36,123 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-06-20 16:42:36,124 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-06-20 16:42:36,124 INFO L153 SettingsManager]: * Use SBE=true [2024-06-20 16:42:36,124 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-06-20 16:42:36,125 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-06-20 16:42:36,125 INFO L153 SettingsManager]: * sizeof long=4 [2024-06-20 16:42:36,125 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-06-20 16:42:36,125 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-06-20 16:42:36,125 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-06-20 16:42:36,126 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-06-20 16:42:36,126 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-06-20 16:42:36,126 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-06-20 16:42:36,126 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-06-20 16:42:36,127 INFO L153 SettingsManager]: * sizeof long double=12 [2024-06-20 16:42:36,127 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-06-20 16:42:36,127 INFO L153 SettingsManager]: * Use constant arrays=true [2024-06-20 16:42:36,128 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-06-20 16:42:36,128 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-06-20 16:42:36,128 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-06-20 16:42:36,129 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-06-20 16:42:36,129 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-20 16:42:36,129 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-06-20 16:42:36,129 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-06-20 16:42:36,129 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-06-20 16:42:36,129 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-06-20 16:42:36,130 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-06-20 16:42:36,130 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-06-20 16:42:36,130 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-06-20 16:42:36,130 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-06-20 16:42:36,130 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-06-20 16:42:36,130 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-06-20 16:42:36,131 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check unreachability of reach_error function -> false [2024-06-20 16:42:36,322 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-06-20 16:42:36,354 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-06-20 16:42:36,356 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-06-20 16:42:36,357 INFO L270 PluginConnector]: Initializing CDTParser... [2024-06-20 16:42:36,357 INFO L274 PluginConnector]: CDTParser initialized [2024-06-20 16:42:36,358 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-wmm/safe000_rmo.i [2024-06-20 16:42:37,440 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-06-20 16:42:37,655 INFO L384 CDTParser]: Found 1 translation units. [2024-06-20 16:42:37,658 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/safe000_rmo.i [2024-06-20 16:42:37,673 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1c38d79a6/0b17b8e2a6914be99aa62534b6de3bed/FLAGee826802e [2024-06-20 16:42:37,686 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1c38d79a6/0b17b8e2a6914be99aa62534b6de3bed [2024-06-20 16:42:37,688 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-06-20 16:42:37,688 INFO L274 PluginConnector]: Witness Parser initialized [2024-06-20 16:42:37,690 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/./goblint.2024-05-21_14-57-05.files/protection/safe000_rmo.yml/witness.yml [2024-06-20 16:42:37,902 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-06-20 16:42:37,903 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-06-20 16:42:37,905 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-06-20 16:42:37,905 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-06-20 16:42:37,908 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-06-20 16:42:37,909 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.06 04:42:37" (1/2) ... [2024-06-20 16:42:37,909 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@744490f4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.06 04:42:37, skipping insertion in model container [2024-06-20 16:42:37,910 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.06 04:42:37" (1/2) ... [2024-06-20 16:42:37,911 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@1d64b6c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.06 04:42:37, skipping insertion in model container [2024-06-20 16:42:37,911 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 20.06 04:42:37" (2/2) ... [2024-06-20 16:42:37,911 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@744490f4 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 20.06 04:42:37, skipping insertion in model container [2024-06-20 16:42:37,911 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 20.06 04:42:37" (2/2) ... [2024-06-20 16:42:37,911 INFO L83 nessWitnessExtractor]: Extracting all invariants from correctness witness [2024-06-20 16:42:38,034 INFO L95 edCorrectnessWitness]: Found the following entries in the witness: [2024-06-20 16:42:38,035 INFO L97 edCorrectnessWitness]: Location invariant before [L855-L855] ((((((((((((((((((((((((((((((((((((! multithreaded || (((0 <= y && y <= 2) && y <= 127) && ((y == 0 || y == 1) || y == 2))) && (! multithreaded || __unbuffered_p0_EAX$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || y$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || y$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || (((0 <= y$mem_tmp && y$mem_tmp <= 2) && y$mem_tmp <= 127) && ((y$mem_tmp == 0 || y$mem_tmp == 1) || y$mem_tmp == 2)))) && (! multithreaded || __unbuffered_p0_EAX$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || y$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || y$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || ((0 <= x && x <= 1) && (x == 0 || x == 1)))) && (! multithreaded || __unbuffered_p0_EAX$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || y$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p1_EAX && __unbuffered_p1_EAX <= 1) && (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1)))) && (! multithreaded || (((0 <= __unbuffered_p2_EAX && __unbuffered_p2_EAX <= 2) && __unbuffered_p2_EAX <= 127) && ((__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1) || __unbuffered_p2_EAX == 2)))) && (! multithreaded || y$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || y$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$mem_tmp == 0)) && (! multithreaded || __unbuffered_p0_EAX$w_buff1_used == (_Bool)0)) && (! multithreaded || y$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || y$flush_delayed == (_Bool)0)) && (! multithreaded || y$w_buff1 == 0)) && (! multithreaded || __unbuffered_p0_EAX$flush_delayed == (_Bool)0)) && (! multithreaded || y$read_delayed_var == 0)) && (! multithreaded || __unbuffered_p0_EAX$w_buff1 == 0)) && (! multithreaded || y$w_buff0_used == (_Bool)0)) && (! multithreaded || (((0 <= __unbuffered_p0_EAX && __unbuffered_p0_EAX <= 2) && __unbuffered_p0_EAX <= 127) && ((__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1) || __unbuffered_p0_EAX == 2)))) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || __unbuffered_p0_EAX$w_buff0 == 0)) && (! multithreaded || y$w_buff1_used == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$w_buff0_used == (_Bool)0)) && (! multithreaded || y$w_buff0 == 0)) && (! multithreaded || (__unbuffered_p0_EAX$read_delayed_var == 0 || ((((0 <= *__unbuffered_p0_EAX$read_delayed_var && *__unbuffered_p0_EAX$read_delayed_var <= 2) && *__unbuffered_p0_EAX$read_delayed_var <= 127) && __unbuffered_p0_EAX$read_delayed_var == & y) && ((*__unbuffered_p0_EAX$read_delayed_var == 0 || *__unbuffered_p0_EAX$read_delayed_var == 1) || *__unbuffered_p0_EAX$read_delayed_var == 2))))) && (! multithreaded || y$read_delayed == (_Bool)0) [2024-06-20 16:42:38,035 INFO L97 edCorrectnessWitness]: Location invariant before [L858-L858] ((((((((((((((((((((((((((((((((((((! multithreaded || (((0 <= y && y <= 2) && y <= 127) && ((y == 0 || y == 1) || y == 2))) && (! multithreaded || __unbuffered_p0_EAX$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || y$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || y$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || (((0 <= y$mem_tmp && y$mem_tmp <= 2) && y$mem_tmp <= 127) && ((y$mem_tmp == 0 || y$mem_tmp == 1) || y$mem_tmp == 2)))) && (! multithreaded || __unbuffered_p0_EAX$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || y$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || y$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || ((0 <= x && x <= 1) && (x == 0 || x == 1)))) && (! multithreaded || __unbuffered_p0_EAX$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || y$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p1_EAX && __unbuffered_p1_EAX <= 1) && (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1)))) && (! multithreaded || (((0 <= __unbuffered_p2_EAX && __unbuffered_p2_EAX <= 2) && __unbuffered_p2_EAX <= 127) && ((__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1) || __unbuffered_p2_EAX == 2)))) && (! multithreaded || y$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || y$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$mem_tmp == 0)) && (! multithreaded || __unbuffered_p0_EAX$w_buff1_used == (_Bool)0)) && (! multithreaded || y$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || y$flush_delayed == (_Bool)0)) && (! multithreaded || y$w_buff1 == 0)) && (! multithreaded || __unbuffered_p0_EAX$flush_delayed == (_Bool)0)) && (! multithreaded || y$read_delayed_var == 0)) && (! multithreaded || __unbuffered_p0_EAX$w_buff1 == 0)) && (! multithreaded || y$w_buff0_used == (_Bool)0)) && (! multithreaded || (((0 <= __unbuffered_p0_EAX && __unbuffered_p0_EAX <= 2) && __unbuffered_p0_EAX <= 127) && ((__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1) || __unbuffered_p0_EAX == 2)))) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || __unbuffered_p0_EAX$w_buff0 == 0)) && (! multithreaded || y$w_buff1_used == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$w_buff0_used == (_Bool)0)) && (! multithreaded || y$w_buff0 == 0)) && (! multithreaded || (__unbuffered_p0_EAX$read_delayed_var == 0 || ((((0 <= *__unbuffered_p0_EAX$read_delayed_var && *__unbuffered_p0_EAX$read_delayed_var <= 2) && *__unbuffered_p0_EAX$read_delayed_var <= 127) && __unbuffered_p0_EAX$read_delayed_var == & y) && ((*__unbuffered_p0_EAX$read_delayed_var == 0 || *__unbuffered_p0_EAX$read_delayed_var == 1) || *__unbuffered_p0_EAX$read_delayed_var == 2))))) && (! multithreaded || y$read_delayed == (_Bool)0) [2024-06-20 16:42:38,036 INFO L97 edCorrectnessWitness]: Location invariant before [L857-L857] ((((((((((((((((((((((((((((((((((((! multithreaded || (((0 <= y && y <= 2) && y <= 127) && ((y == 0 || y == 1) || y == 2))) && (! multithreaded || __unbuffered_p0_EAX$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || y$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || y$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || (((0 <= y$mem_tmp && y$mem_tmp <= 2) && y$mem_tmp <= 127) && ((y$mem_tmp == 0 || y$mem_tmp == 1) || y$mem_tmp == 2)))) && (! multithreaded || __unbuffered_p0_EAX$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || y$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || y$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || ((0 <= x && x <= 1) && (x == 0 || x == 1)))) && (! multithreaded || __unbuffered_p0_EAX$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || y$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p1_EAX && __unbuffered_p1_EAX <= 1) && (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1)))) && (! multithreaded || (((0 <= __unbuffered_p2_EAX && __unbuffered_p2_EAX <= 2) && __unbuffered_p2_EAX <= 127) && ((__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1) || __unbuffered_p2_EAX == 2)))) && (! multithreaded || y$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || y$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$mem_tmp == 0)) && (! multithreaded || __unbuffered_p0_EAX$w_buff1_used == (_Bool)0)) && (! multithreaded || y$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || y$flush_delayed == (_Bool)0)) && (! multithreaded || y$w_buff1 == 0)) && (! multithreaded || __unbuffered_p0_EAX$flush_delayed == (_Bool)0)) && (! multithreaded || y$read_delayed_var == 0)) && (! multithreaded || __unbuffered_p0_EAX$w_buff1 == 0)) && (! multithreaded || y$w_buff0_used == (_Bool)0)) && (! multithreaded || (((0 <= __unbuffered_p0_EAX && __unbuffered_p0_EAX <= 2) && __unbuffered_p0_EAX <= 127) && ((__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1) || __unbuffered_p0_EAX == 2)))) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || __unbuffered_p0_EAX$w_buff0 == 0)) && (! multithreaded || y$w_buff1_used == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$w_buff0_used == (_Bool)0)) && (! multithreaded || y$w_buff0 == 0)) && (! multithreaded || (__unbuffered_p0_EAX$read_delayed_var == 0 || ((((0 <= *__unbuffered_p0_EAX$read_delayed_var && *__unbuffered_p0_EAX$read_delayed_var <= 2) && *__unbuffered_p0_EAX$read_delayed_var <= 127) && __unbuffered_p0_EAX$read_delayed_var == & y) && ((*__unbuffered_p0_EAX$read_delayed_var == 0 || *__unbuffered_p0_EAX$read_delayed_var == 1) || *__unbuffered_p0_EAX$read_delayed_var == 2))))) && (! multithreaded || y$read_delayed == (_Bool)0) [2024-06-20 16:42:38,036 INFO L103 edCorrectnessWitness]: ghost_variable multithreaded = 0 [2024-06-20 16:42:38,036 INFO L106 edCorrectnessWitness]: ghost_update [L853-L853] multithreaded = 1; [2024-06-20 16:42:38,077 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-06-20 16:42:38,360 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-20 16:42:38,374 INFO L202 MainTranslator]: Completed pre-run Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local [2024-06-20 16:42:38,520 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-20 16:42:38,561 INFO L206 MainTranslator]: Completed translation [2024-06-20 16:42:38,561 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 20.06 04:42:38 WrapperNode [2024-06-20 16:42:38,561 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-06-20 16:42:38,562 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-06-20 16:42:38,562 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-06-20 16:42:38,562 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-06-20 16:42:38,567 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 20.06 04:42:38" (1/1) ... [2024-06-20 16:42:38,593 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 20.06 04:42:38" (1/1) ... [2024-06-20 16:42:38,629 INFO L138 Inliner]: procedures = 175, calls = 107, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 279 [2024-06-20 16:42:38,629 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-06-20 16:42:38,630 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-06-20 16:42:38,630 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-06-20 16:42:38,630 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-06-20 16:42:38,638 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 20.06 04:42:38" (1/1) ... [2024-06-20 16:42:38,638 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 20.06 04:42:38" (1/1) ... [2024-06-20 16:42:38,642 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 20.06 04:42:38" (1/1) ... [2024-06-20 16:42:38,699 INFO L175 MemorySlicer]: Split 66 memory accesses to 2 slices as follows [2, 64]. 97 percent of accesses are in the largest equivalence class. The 3 initializations are split as follows [2, 1]. The 11 writes are split as follows [0, 11]. [2024-06-20 16:42:38,700 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 20.06 04:42:38" (1/1) ... [2024-06-20 16:42:38,700 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 20.06 04:42:38" (1/1) ... [2024-06-20 16:42:38,725 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 20.06 04:42:38" (1/1) ... [2024-06-20 16:42:38,727 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 20.06 04:42:38" (1/1) ... [2024-06-20 16:42:38,730 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 20.06 04:42:38" (1/1) ... [2024-06-20 16:42:38,741 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 20.06 04:42:38" (1/1) ... [2024-06-20 16:42:38,745 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-06-20 16:42:38,746 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-06-20 16:42:38,746 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-06-20 16:42:38,746 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-06-20 16:42:38,747 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 20.06 04:42:38" (1/1) ... [2024-06-20 16:42:38,753 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-20 16:42:38,758 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-20 16:42:38,802 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) [2024-06-20 16:42:38,839 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 [2024-06-20 16:42:38,865 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-06-20 16:42:38,866 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-06-20 16:42:38,866 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-06-20 16:42:38,866 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-06-20 16:42:38,866 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-06-20 16:42:38,866 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-06-20 16:42:38,867 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2024-06-20 16:42:38,867 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2024-06-20 16:42:38,867 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2024-06-20 16:42:38,867 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2024-06-20 16:42:38,867 INFO L130 BoogieDeclarations]: Found specification of procedure P2 [2024-06-20 16:42:38,867 INFO L138 BoogieDeclarations]: Found implementation of procedure P2 [2024-06-20 16:42:38,867 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-06-20 16:42:38,868 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-06-20 16:42:38,868 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-06-20 16:42:38,868 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-06-20 16:42:38,869 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-06-20 16:42:38,870 WARN L214 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2024-06-20 16:42:38,991 INFO L244 CfgBuilder]: Building ICFG [2024-06-20 16:42:38,995 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-06-20 16:42:39,536 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-06-20 16:42:39,536 INFO L293 CfgBuilder]: Performing block encoding [2024-06-20 16:42:40,049 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-06-20 16:42:40,049 INFO L320 CfgBuilder]: Removed 0 assume(true) statements. [2024-06-20 16:42:40,049 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.06 04:42:40 BoogieIcfgContainer [2024-06-20 16:42:40,050 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-06-20 16:42:40,051 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-06-20 16:42:40,051 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-06-20 16:42:40,053 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-06-20 16:42:40,054 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.06 04:42:37" (1/4) ... [2024-06-20 16:42:40,054 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5e0b220f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.06 04:42:40, skipping insertion in model container [2024-06-20 16:42:40,054 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 20.06 04:42:37" (2/4) ... [2024-06-20 16:42:40,054 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5e0b220f and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 20.06 04:42:40, skipping insertion in model container [2024-06-20 16:42:40,054 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 20.06 04:42:38" (3/4) ... [2024-06-20 16:42:40,055 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5e0b220f and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 20.06 04:42:40, skipping insertion in model container [2024-06-20 16:42:40,055 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.06 04:42:40" (4/4) ... [2024-06-20 16:42:40,056 INFO L112 eAbstractionObserver]: Analyzing ICFG safe000_rmo.i [2024-06-20 16:42:40,069 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-06-20 16:42:40,069 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 3 error locations. [2024-06-20 16:42:40,069 INFO L522 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-06-20 16:42:40,117 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-06-20 16:42:40,138 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 52 places, 42 transitions, 96 flow [2024-06-20 16:42:40,189 INFO L124 PetriNetUnfolderBase]: 0/39 cut-off events. [2024-06-20 16:42:40,190 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-20 16:42:40,192 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49 conditions, 39 events. 0/39 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 57 event pairs, 0 based on Foata normal form. 0/36 useless extension candidates. Maximal degree in co-relation 0. Up to 1 conditions per place. [2024-06-20 16:42:40,192 INFO L82 GeneralOperation]: Start removeDead. Operand has 52 places, 42 transitions, 96 flow [2024-06-20 16:42:40,210 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 43 places, 33 transitions, 75 flow [2024-06-20 16:42:40,216 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-06-20 16:42:40,221 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;@fe0ca5e, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-06-20 16:42:40,221 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2024-06-20 16:42:40,225 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-06-20 16:42:40,225 INFO L124 PetriNetUnfolderBase]: 0/5 cut-off events. [2024-06-20 16:42:40,225 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-20 16:42:40,225 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:42:40,226 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2024-06-20 16:42:40,226 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:42:40,230 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:42:40,230 INFO L85 PathProgramCache]: Analyzing trace with hash 906645505, now seen corresponding path program 1 times [2024-06-20 16:42:40,236 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:42:40,237 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [706279111] [2024-06-20 16:42:40,237 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:42:40,237 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:42:40,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:42:42,131 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:42:42,132 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:42:42,132 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [706279111] [2024-06-20 16:42:42,133 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [706279111] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:42:42,133 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:42:42,133 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-06-20 16:42:42,134 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2099475547] [2024-06-20 16:42:42,135 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:42:42,141 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-06-20 16:42:42,149 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:42:42,172 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-06-20 16:42:42,173 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-06-20 16:42:42,185 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-20 16:42:42,187 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 33 transitions, 75 flow. Second operand has 3 states, 3 states have (on average 10.333333333333334) internal successors, (31), 3 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:42:42,187 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:42:42,187 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-20 16:42:42,188 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:42:42,777 INFO L124 PetriNetUnfolderBase]: 1157/1772 cut-off events. [2024-06-20 16:42:42,778 INFO L125 PetriNetUnfolderBase]: For 29/29 co-relation queries the response was YES. [2024-06-20 16:42:42,784 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3593 conditions, 1772 events. 1157/1772 cut-off events. For 29/29 co-relation queries the response was YES. Maximal size of possible extension queue 90. Compared 8383 event pairs, 709 based on Foata normal form. 2/1743 useless extension candidates. Maximal degree in co-relation 3581. Up to 1741 conditions per place. [2024-06-20 16:42:42,793 INFO L140 encePairwiseOnDemand]: 35/42 looper letters, 36 selfloop transitions, 4 changer transitions 0/46 dead transitions. [2024-06-20 16:42:42,794 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 45 places, 46 transitions, 187 flow [2024-06-20 16:42:42,795 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-06-20 16:42:42,797 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-06-20 16:42:42,802 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 70 transitions. [2024-06-20 16:42:42,804 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5555555555555556 [2024-06-20 16:42:42,805 INFO L175 Difference]: Start difference. First operand has 43 places, 33 transitions, 75 flow. Second operand 3 states and 70 transitions. [2024-06-20 16:42:42,806 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 45 places, 46 transitions, 187 flow [2024-06-20 16:42:42,808 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 42 places, 46 transitions, 182 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-06-20 16:42:42,812 INFO L231 Difference]: Finished difference. Result has 43 places, 36 transitions, 102 flow [2024-06-20 16:42:42,813 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=72, PETRI_DIFFERENCE_MINUEND_PLACES=40, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=33, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=102, PETRI_PLACES=43, PETRI_TRANSITIONS=36} [2024-06-20 16:42:42,815 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 0 predicate places. [2024-06-20 16:42:42,816 INFO L495 AbstractCegarLoop]: Abstraction has has 43 places, 36 transitions, 102 flow [2024-06-20 16:42:42,816 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 10.333333333333334) internal successors, (31), 3 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:42:42,816 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:42:42,816 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:42:42,816 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-06-20 16:42:42,817 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:42:42,818 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:42:42,818 INFO L85 PathProgramCache]: Analyzing trace with hash -591977984, now seen corresponding path program 1 times [2024-06-20 16:42:42,818 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:42:42,819 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1353703125] [2024-06-20 16:42:42,819 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:42:42,819 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:42:42,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:42:44,999 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:42:45,000 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:42:45,000 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1353703125] [2024-06-20 16:42:45,000 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1353703125] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:42:45,000 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:42:45,000 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-06-20 16:42:45,001 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1064230592] [2024-06-20 16:42:45,001 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:42:45,002 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-20 16:42:45,002 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:42:45,002 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-20 16:42:45,002 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-06-20 16:42:45,023 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-20 16:42:45,023 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 36 transitions, 102 flow. Second operand has 4 states, 4 states have (on average 10.25) internal successors, (41), 4 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:42:45,023 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:42:45,023 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-20 16:42:45,024 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:42:45,646 INFO L124 PetriNetUnfolderBase]: 1148/1758 cut-off events. [2024-06-20 16:42:45,647 INFO L125 PetriNetUnfolderBase]: For 327/330 co-relation queries the response was YES. [2024-06-20 16:42:45,649 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4058 conditions, 1758 events. 1148/1758 cut-off events. For 327/330 co-relation queries the response was YES. Maximal size of possible extension queue 90. Compared 8346 event pairs, 585 based on Foata normal form. 6/1762 useless extension candidates. Maximal degree in co-relation 4046. Up to 1704 conditions per place. [2024-06-20 16:42:45,655 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 46 selfloop transitions, 7 changer transitions 0/59 dead transitions. [2024-06-20 16:42:45,655 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 59 transitions, 266 flow [2024-06-20 16:42:45,655 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-20 16:42:45,655 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-20 16:42:45,656 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 92 transitions. [2024-06-20 16:42:45,656 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5476190476190477 [2024-06-20 16:42:45,656 INFO L175 Difference]: Start difference. First operand has 43 places, 36 transitions, 102 flow. Second operand 4 states and 92 transitions. [2024-06-20 16:42:45,657 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 59 transitions, 266 flow [2024-06-20 16:42:45,657 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 59 transitions, 262 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-06-20 16:42:45,658 INFO L231 Difference]: Finished difference. Result has 46 places, 39 transitions, 138 flow [2024-06-20 16:42:45,658 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=98, PETRI_DIFFERENCE_MINUEND_PLACES=42, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=36, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=138, PETRI_PLACES=46, PETRI_TRANSITIONS=39} [2024-06-20 16:42:45,659 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 3 predicate places. [2024-06-20 16:42:45,659 INFO L495 AbstractCegarLoop]: Abstraction has has 46 places, 39 transitions, 138 flow [2024-06-20 16:42:45,659 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 10.25) internal successors, (41), 4 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:42:45,659 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:42:45,660 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:42:45,660 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-06-20 16:42:45,660 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:42:45,660 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:42:45,660 INFO L85 PathProgramCache]: Analyzing trace with hash -1171446609, now seen corresponding path program 1 times [2024-06-20 16:42:45,661 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:42:45,661 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1021327882] [2024-06-20 16:42:45,661 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:42:45,661 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:42:45,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:42:48,048 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:42:48,049 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:42:48,049 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1021327882] [2024-06-20 16:42:48,049 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1021327882] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:42:48,049 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:42:48,049 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-20 16:42:48,049 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [545709815] [2024-06-20 16:42:48,050 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:42:48,050 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-20 16:42:48,050 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:42:48,050 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-20 16:42:48,051 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-06-20 16:42:48,058 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-20 16:42:48,058 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 46 places, 39 transitions, 138 flow. Second operand has 5 states, 5 states have (on average 9.2) internal successors, (46), 5 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:42:48,058 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:42:48,058 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-20 16:42:48,058 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:42:48,883 INFO L124 PetriNetUnfolderBase]: 1375/2089 cut-off events. [2024-06-20 16:42:48,884 INFO L125 PetriNetUnfolderBase]: For 1062/1062 co-relation queries the response was YES. [2024-06-20 16:42:48,887 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5347 conditions, 2089 events. 1375/2089 cut-off events. For 1062/1062 co-relation queries the response was YES. Maximal size of possible extension queue 97. Compared 9835 event pairs, 547 based on Foata normal form. 4/2092 useless extension candidates. Maximal degree in co-relation 5333. Up to 2012 conditions per place. [2024-06-20 16:42:48,893 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 63 selfloop transitions, 10 changer transitions 0/78 dead transitions. [2024-06-20 16:42:48,894 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 50 places, 78 transitions, 395 flow [2024-06-20 16:42:48,895 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-20 16:42:48,895 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-20 16:42:48,895 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 110 transitions. [2024-06-20 16:42:48,896 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5238095238095238 [2024-06-20 16:42:48,896 INFO L175 Difference]: Start difference. First operand has 46 places, 39 transitions, 138 flow. Second operand 5 states and 110 transitions. [2024-06-20 16:42:48,896 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 50 places, 78 transitions, 395 flow [2024-06-20 16:42:48,897 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 48 places, 78 transitions, 374 flow, removed 3 selfloop flow, removed 2 redundant places. [2024-06-20 16:42:48,898 INFO L231 Difference]: Finished difference. Result has 51 places, 48 transitions, 208 flow [2024-06-20 16:42:48,899 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=124, PETRI_DIFFERENCE_MINUEND_PLACES=44, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=39, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=208, PETRI_PLACES=51, PETRI_TRANSITIONS=48} [2024-06-20 16:42:48,899 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 8 predicate places. [2024-06-20 16:42:48,899 INFO L495 AbstractCegarLoop]: Abstraction has has 51 places, 48 transitions, 208 flow [2024-06-20 16:42:48,900 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 9.2) internal successors, (46), 5 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:42:48,900 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:42:48,900 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:42:48,900 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-06-20 16:42:48,900 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:42:48,901 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:42:48,901 INFO L85 PathProgramCache]: Analyzing trace with hash -1342335620, now seen corresponding path program 1 times [2024-06-20 16:42:48,901 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:42:48,901 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [530124442] [2024-06-20 16:42:48,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:42:48,901 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:42:48,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:42:51,551 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:42:51,555 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:42:51,558 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [530124442] [2024-06-20 16:42:51,558 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [530124442] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:42:51,559 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:42:51,559 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-20 16:42:51,559 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1452517452] [2024-06-20 16:42:51,559 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:42:51,564 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-20 16:42:51,564 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:42:51,566 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-20 16:42:51,571 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-06-20 16:42:51,593 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-20 16:42:51,595 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 48 transitions, 208 flow. Second operand has 6 states, 6 states have (on average 9.166666666666666) internal successors, (55), 6 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:42:51,595 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:42:51,595 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-20 16:42:51,596 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:42:52,443 INFO L124 PetriNetUnfolderBase]: 1361/2067 cut-off events. [2024-06-20 16:42:52,444 INFO L125 PetriNetUnfolderBase]: For 1822/1822 co-relation queries the response was YES. [2024-06-20 16:42:52,447 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5847 conditions, 2067 events. 1361/2067 cut-off events. For 1822/1822 co-relation queries the response was YES. Maximal size of possible extension queue 97. Compared 9727 event pairs, 384 based on Foata normal form. 8/2074 useless extension candidates. Maximal degree in co-relation 5830. Up to 1942 conditions per place. [2024-06-20 16:42:52,454 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 69 selfloop transitions, 12 changer transitions 0/86 dead transitions. [2024-06-20 16:42:52,454 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 55 places, 86 transitions, 462 flow [2024-06-20 16:42:52,455 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-20 16:42:52,455 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-20 16:42:52,457 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 126 transitions. [2024-06-20 16:42:52,458 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5 [2024-06-20 16:42:52,458 INFO L175 Difference]: Start difference. First operand has 51 places, 48 transitions, 208 flow. Second operand 6 states and 126 transitions. [2024-06-20 16:42:52,458 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 55 places, 86 transitions, 462 flow [2024-06-20 16:42:52,463 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 55 places, 86 transitions, 458 flow, removed 2 selfloop flow, removed 0 redundant places. [2024-06-20 16:42:52,464 INFO L231 Difference]: Finished difference. Result has 56 places, 49 transitions, 243 flow [2024-06-20 16:42:52,464 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=196, PETRI_DIFFERENCE_MINUEND_PLACES=50, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=47, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=243, PETRI_PLACES=56, PETRI_TRANSITIONS=49} [2024-06-20 16:42:52,465 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 13 predicate places. [2024-06-20 16:42:52,466 INFO L495 AbstractCegarLoop]: Abstraction has has 56 places, 49 transitions, 243 flow [2024-06-20 16:42:52,466 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 9.166666666666666) internal successors, (55), 6 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:42:52,466 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:42:52,466 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:42:52,466 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-06-20 16:42:52,467 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:42:52,467 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:42:52,467 INFO L85 PathProgramCache]: Analyzing trace with hash -664706290, now seen corresponding path program 1 times [2024-06-20 16:42:52,467 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:42:52,468 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1973453969] [2024-06-20 16:42:52,468 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:42:52,468 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:42:52,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:42:54,184 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:42:54,185 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:42:54,185 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1973453969] [2024-06-20 16:42:54,186 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1973453969] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:42:54,186 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:42:54,187 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 16:42:54,187 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [93077370] [2024-06-20 16:42:54,187 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:42:54,188 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 16:42:54,188 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:42:54,188 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 16:42:54,188 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-20 16:42:54,200 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-20 16:42:54,200 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 49 transitions, 243 flow. Second operand has 7 states, 7 states have (on average 8.571428571428571) internal successors, (60), 7 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:42:54,200 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:42:54,200 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-20 16:42:54,201 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:42:55,014 INFO L124 PetriNetUnfolderBase]: 1351/2052 cut-off events. [2024-06-20 16:42:55,014 INFO L125 PetriNetUnfolderBase]: For 2816/2816 co-relation queries the response was YES. [2024-06-20 16:42:55,019 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6222 conditions, 2052 events. 1351/2052 cut-off events. For 2816/2816 co-relation queries the response was YES. Maximal size of possible extension queue 97. Compared 9481 event pairs, 554 based on Foata normal form. 4/2055 useless extension candidates. Maximal degree in co-relation 6201. Up to 1994 conditions per place. [2024-06-20 16:42:55,027 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 59 selfloop transitions, 9 changer transitions 0/72 dead transitions. [2024-06-20 16:42:55,028 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 60 places, 72 transitions, 456 flow [2024-06-20 16:42:55,028 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-20 16:42:55,028 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-20 16:42:55,031 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 87 transitions. [2024-06-20 16:42:55,031 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4142857142857143 [2024-06-20 16:42:55,031 INFO L175 Difference]: Start difference. First operand has 56 places, 49 transitions, 243 flow. Second operand 5 states and 87 transitions. [2024-06-20 16:42:55,031 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 60 places, 72 transitions, 456 flow [2024-06-20 16:42:55,034 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 56 places, 72 transitions, 423 flow, removed 4 selfloop flow, removed 4 redundant places. [2024-06-20 16:42:55,039 INFO L231 Difference]: Finished difference. Result has 58 places, 56 transitions, 289 flow [2024-06-20 16:42:55,040 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=214, PETRI_DIFFERENCE_MINUEND_PLACES=52, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=289, PETRI_PLACES=58, PETRI_TRANSITIONS=56} [2024-06-20 16:42:55,042 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 15 predicate places. [2024-06-20 16:42:55,042 INFO L495 AbstractCegarLoop]: Abstraction has has 58 places, 56 transitions, 289 flow [2024-06-20 16:42:55,042 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 8.571428571428571) internal successors, (60), 7 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:42:55,042 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:42:55,042 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:42:55,042 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-06-20 16:42:55,042 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:42:55,043 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:42:55,043 INFO L85 PathProgramCache]: Analyzing trace with hash -726036975, now seen corresponding path program 1 times [2024-06-20 16:42:55,043 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:42:55,043 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1008131064] [2024-06-20 16:42:55,043 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:42:55,043 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:42:55,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:42:58,118 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:42:58,119 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:42:58,119 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1008131064] [2024-06-20 16:42:58,119 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1008131064] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:42:58,120 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:42:58,120 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 16:42:58,120 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1556268623] [2024-06-20 16:42:58,120 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:42:58,121 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 16:42:58,122 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:42:58,122 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 16:42:58,122 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-20 16:42:58,142 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-20 16:42:58,143 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 58 places, 56 transitions, 289 flow. Second operand has 8 states, 8 states have (on average 8.5) internal successors, (68), 8 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:42:58,143 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:42:58,143 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-20 16:42:58,143 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:42:59,301 INFO L124 PetriNetUnfolderBase]: 1369/2088 cut-off events. [2024-06-20 16:42:59,301 INFO L125 PetriNetUnfolderBase]: For 3831/3833 co-relation queries the response was YES. [2024-06-20 16:42:59,308 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6788 conditions, 2088 events. 1369/2088 cut-off events. For 3831/3833 co-relation queries the response was YES. Maximal size of possible extension queue 97. Compared 9813 event pairs, 494 based on Foata normal form. 5/2092 useless extension candidates. Maximal degree in co-relation 6764. Up to 1926 conditions per place. [2024-06-20 16:42:59,316 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 71 selfloop transitions, 24 changer transitions 0/99 dead transitions. [2024-06-20 16:42:59,316 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 64 places, 99 transitions, 633 flow [2024-06-20 16:42:59,317 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 16:42:59,317 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 16:42:59,318 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 132 transitions. [2024-06-20 16:42:59,318 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4489795918367347 [2024-06-20 16:42:59,318 INFO L175 Difference]: Start difference. First operand has 58 places, 56 transitions, 289 flow. Second operand 7 states and 132 transitions. [2024-06-20 16:42:59,319 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 64 places, 99 transitions, 633 flow [2024-06-20 16:42:59,321 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 63 places, 99 transitions, 629 flow, removed 1 selfloop flow, removed 1 redundant places. [2024-06-20 16:42:59,323 INFO L231 Difference]: Finished difference. Result has 64 places, 62 transitions, 387 flow [2024-06-20 16:42:59,323 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=285, PETRI_DIFFERENCE_MINUEND_PLACES=57, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=56, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=387, PETRI_PLACES=64, PETRI_TRANSITIONS=62} [2024-06-20 16:42:59,326 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 21 predicate places. [2024-06-20 16:42:59,326 INFO L495 AbstractCegarLoop]: Abstraction has has 64 places, 62 transitions, 387 flow [2024-06-20 16:42:59,326 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.5) internal successors, (68), 8 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:42:59,326 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:42:59,326 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:42:59,326 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-06-20 16:42:59,327 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:42:59,327 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:42:59,327 INFO L85 PathProgramCache]: Analyzing trace with hash -725917005, now seen corresponding path program 2 times [2024-06-20 16:42:59,327 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:42:59,330 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [927775121] [2024-06-20 16:42:59,330 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:42:59,330 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:42:59,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:43:02,302 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:43:02,302 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:43:02,302 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [927775121] [2024-06-20 16:43:02,302 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [927775121] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:43:02,302 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:43:02,302 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 16:43:02,303 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1898605933] [2024-06-20 16:43:02,303 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:43:02,303 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 16:43:02,303 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:43:02,304 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 16:43:02,304 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-20 16:43:02,345 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-20 16:43:02,345 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 64 places, 62 transitions, 387 flow. Second operand has 8 states, 8 states have (on average 8.5) internal successors, (68), 8 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:43:02,345 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:43:02,345 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-20 16:43:02,345 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:43:03,524 INFO L124 PetriNetUnfolderBase]: 1405/2148 cut-off events. [2024-06-20 16:43:03,525 INFO L125 PetriNetUnfolderBase]: For 5615/5617 co-relation queries the response was YES. [2024-06-20 16:43:03,528 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7591 conditions, 2148 events. 1405/2148 cut-off events. For 5615/5617 co-relation queries the response was YES. Maximal size of possible extension queue 98. Compared 10195 event pairs, 492 based on Foata normal form. 5/2152 useless extension candidates. Maximal degree in co-relation 7564. Up to 2014 conditions per place. [2024-06-20 16:43:03,535 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 73 selfloop transitions, 22 changer transitions 0/99 dead transitions. [2024-06-20 16:43:03,535 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 70 places, 99 transitions, 705 flow [2024-06-20 16:43:03,536 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 16:43:03,536 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 16:43:03,536 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 125 transitions. [2024-06-20 16:43:03,537 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42517006802721086 [2024-06-20 16:43:03,537 INFO L175 Difference]: Start difference. First operand has 64 places, 62 transitions, 387 flow. Second operand 7 states and 125 transitions. [2024-06-20 16:43:03,537 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 70 places, 99 transitions, 705 flow [2024-06-20 16:43:03,541 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 67 places, 99 transitions, 668 flow, removed 7 selfloop flow, removed 3 redundant places. [2024-06-20 16:43:03,542 INFO L231 Difference]: Finished difference. Result has 68 places, 68 transitions, 456 flow [2024-06-20 16:43:03,543 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=353, PETRI_DIFFERENCE_MINUEND_PLACES=61, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=62, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=456, PETRI_PLACES=68, PETRI_TRANSITIONS=68} [2024-06-20 16:43:03,543 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 25 predicate places. [2024-06-20 16:43:03,543 INFO L495 AbstractCegarLoop]: Abstraction has has 68 places, 68 transitions, 456 flow [2024-06-20 16:43:03,543 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.5) internal successors, (68), 8 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:43:03,544 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:43:03,544 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:43:03,544 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-06-20 16:43:03,544 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:43:03,544 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:43:03,544 INFO L85 PathProgramCache]: Analyzing trace with hash -555214389, now seen corresponding path program 1 times [2024-06-20 16:43:03,544 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:43:03,545 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [820539453] [2024-06-20 16:43:03,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:43:03,545 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:43:03,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:43:06,224 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:43:06,224 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:43:06,224 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [820539453] [2024-06-20 16:43:06,224 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [820539453] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:43:06,224 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:43:06,224 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 16:43:06,224 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1293848602] [2024-06-20 16:43:06,224 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:43:06,225 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 16:43:06,225 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:43:06,225 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 16:43:06,225 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-20 16:43:06,257 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-20 16:43:06,257 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 68 places, 68 transitions, 456 flow. Second operand has 8 states, 8 states have (on average 8.5) internal successors, (68), 8 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:43:06,257 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:43:06,257 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-20 16:43:06,257 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:43:07,425 INFO L124 PetriNetUnfolderBase]: 1633/2468 cut-off events. [2024-06-20 16:43:07,425 INFO L125 PetriNetUnfolderBase]: For 7646/7648 co-relation queries the response was YES. [2024-06-20 16:43:07,430 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8902 conditions, 2468 events. 1633/2468 cut-off events. For 7646/7648 co-relation queries the response was YES. Maximal size of possible extension queue 115. Compared 11710 event pairs, 510 based on Foata normal form. 12/2479 useless extension candidates. Maximal degree in co-relation 8873. Up to 2174 conditions per place. [2024-06-20 16:43:07,440 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 92 selfloop transitions, 33 changer transitions 0/129 dead transitions. [2024-06-20 16:43:07,441 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 76 places, 129 transitions, 940 flow [2024-06-20 16:43:07,443 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 16:43:07,443 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 16:43:07,443 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 166 transitions. [2024-06-20 16:43:07,444 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43915343915343913 [2024-06-20 16:43:07,444 INFO L175 Difference]: Start difference. First operand has 68 places, 68 transitions, 456 flow. Second operand 9 states and 166 transitions. [2024-06-20 16:43:07,444 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 76 places, 129 transitions, 940 flow [2024-06-20 16:43:07,450 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 72 places, 129 transitions, 884 flow, removed 9 selfloop flow, removed 4 redundant places. [2024-06-20 16:43:07,451 INFO L231 Difference]: Finished difference. Result has 75 places, 82 transitions, 572 flow [2024-06-20 16:43:07,451 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=400, PETRI_DIFFERENCE_MINUEND_PLACES=64, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=68, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=572, PETRI_PLACES=75, PETRI_TRANSITIONS=82} [2024-06-20 16:43:07,452 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 32 predicate places. [2024-06-20 16:43:07,452 INFO L495 AbstractCegarLoop]: Abstraction has has 75 places, 82 transitions, 572 flow [2024-06-20 16:43:07,452 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.5) internal successors, (68), 8 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:43:07,452 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:43:07,452 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:43:07,452 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-06-20 16:43:07,453 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:43:07,453 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:43:07,453 INFO L85 PathProgramCache]: Analyzing trace with hash 1666118313, now seen corresponding path program 2 times [2024-06-20 16:43:07,453 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:43:07,453 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1343139191] [2024-06-20 16:43:07,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:43:07,454 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:43:07,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:43:09,799 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:43:09,799 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:43:09,799 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1343139191] [2024-06-20 16:43:09,799 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1343139191] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:43:09,799 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:43:09,800 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 16:43:09,805 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [531081510] [2024-06-20 16:43:09,806 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:43:09,806 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 16:43:09,806 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:43:09,807 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 16:43:09,807 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-20 16:43:09,821 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-20 16:43:09,821 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 75 places, 82 transitions, 572 flow. Second operand has 8 states, 8 states have (on average 8.5) internal successors, (68), 8 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:43:09,821 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:43:09,822 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-20 16:43:09,822 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:43:10,762 INFO L124 PetriNetUnfolderBase]: 1623/2452 cut-off events. [2024-06-20 16:43:10,762 INFO L125 PetriNetUnfolderBase]: For 10221/10231 co-relation queries the response was YES. [2024-06-20 16:43:10,768 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10041 conditions, 2452 events. 1623/2452 cut-off events. For 10221/10231 co-relation queries the response was YES. Maximal size of possible extension queue 113. Compared 11495 event pairs, 553 based on Foata normal form. 14/2465 useless extension candidates. Maximal degree in co-relation 10009. Up to 2259 conditions per place. [2024-06-20 16:43:10,776 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 94 selfloop transitions, 22 changer transitions 0/120 dead transitions. [2024-06-20 16:43:10,776 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 80 places, 120 transitions, 1005 flow [2024-06-20 16:43:10,777 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-20 16:43:10,777 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-20 16:43:10,777 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 107 transitions. [2024-06-20 16:43:10,777 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4246031746031746 [2024-06-20 16:43:10,778 INFO L175 Difference]: Start difference. First operand has 75 places, 82 transitions, 572 flow. Second operand 6 states and 107 transitions. [2024-06-20 16:43:10,778 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 80 places, 120 transitions, 1005 flow [2024-06-20 16:43:10,787 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 76 places, 120 transitions, 947 flow, removed 13 selfloop flow, removed 4 redundant places. [2024-06-20 16:43:10,788 INFO L231 Difference]: Finished difference. Result has 79 places, 95 transitions, 714 flow [2024-06-20 16:43:10,789 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=525, PETRI_DIFFERENCE_MINUEND_PLACES=71, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=82, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=61, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=714, PETRI_PLACES=79, PETRI_TRANSITIONS=95} [2024-06-20 16:43:10,789 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 36 predicate places. [2024-06-20 16:43:10,789 INFO L495 AbstractCegarLoop]: Abstraction has has 79 places, 95 transitions, 714 flow [2024-06-20 16:43:10,789 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.5) internal successors, (68), 8 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:43:10,789 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:43:10,790 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:43:10,790 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-06-20 16:43:10,790 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:43:10,790 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:43:10,790 INFO L85 PathProgramCache]: Analyzing trace with hash 319867009, now seen corresponding path program 3 times [2024-06-20 16:43:10,790 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:43:10,791 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1942428837] [2024-06-20 16:43:10,791 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:43:10,791 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:43:10,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:43:12,976 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:43:12,977 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:43:12,977 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1942428837] [2024-06-20 16:43:12,977 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1942428837] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:43:12,977 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:43:12,977 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 16:43:12,977 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1613745299] [2024-06-20 16:43:12,977 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:43:12,978 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 16:43:12,978 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:43:12,978 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 16:43:12,978 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-20 16:43:12,993 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-20 16:43:12,993 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 79 places, 95 transitions, 714 flow. Second operand has 8 states, 8 states have (on average 8.5) internal successors, (68), 8 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:43:12,993 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:43:12,993 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-20 16:43:12,994 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:43:14,129 INFO L124 PetriNetUnfolderBase]: 1615/2437 cut-off events. [2024-06-20 16:43:14,129 INFO L125 PetriNetUnfolderBase]: For 12461/12463 co-relation queries the response was YES. [2024-06-20 16:43:14,134 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10681 conditions, 2437 events. 1615/2437 cut-off events. For 12461/12463 co-relation queries the response was YES. Maximal size of possible extension queue 112. Compared 11449 event pairs, 527 based on Foata normal form. 5/2441 useless extension candidates. Maximal degree in co-relation 10645. Up to 2269 conditions per place. [2024-06-20 16:43:14,141 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 87 selfloop transitions, 32 changer transitions 0/123 dead transitions. [2024-06-20 16:43:14,142 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 84 places, 123 transitions, 1028 flow [2024-06-20 16:43:14,143 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-20 16:43:14,143 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-20 16:43:14,143 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 114 transitions. [2024-06-20 16:43:14,144 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4523809523809524 [2024-06-20 16:43:14,144 INFO L175 Difference]: Start difference. First operand has 79 places, 95 transitions, 714 flow. Second operand 6 states and 114 transitions. [2024-06-20 16:43:14,144 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 84 places, 123 transitions, 1028 flow [2024-06-20 16:43:14,154 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 83 places, 123 transitions, 994 flow, removed 16 selfloop flow, removed 1 redundant places. [2024-06-20 16:43:14,156 INFO L231 Difference]: Finished difference. Result has 84 places, 95 transitions, 765 flow [2024-06-20 16:43:14,157 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=682, PETRI_DIFFERENCE_MINUEND_PLACES=78, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=95, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=63, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=765, PETRI_PLACES=84, PETRI_TRANSITIONS=95} [2024-06-20 16:43:14,157 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 41 predicate places. [2024-06-20 16:43:14,158 INFO L495 AbstractCegarLoop]: Abstraction has has 84 places, 95 transitions, 765 flow [2024-06-20 16:43:14,159 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.5) internal successors, (68), 8 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:43:14,159 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:43:14,159 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:43:14,159 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-06-20 16:43:14,159 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:43:14,160 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:43:14,160 INFO L85 PathProgramCache]: Analyzing trace with hash 1665881163, now seen corresponding path program 3 times [2024-06-20 16:43:14,160 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:43:14,160 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [667325063] [2024-06-20 16:43:14,160 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:43:14,160 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:43:14,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:43:16,761 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:43:16,761 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:43:16,761 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [667325063] [2024-06-20 16:43:16,761 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [667325063] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:43:16,761 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:43:16,761 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 16:43:16,761 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1594535282] [2024-06-20 16:43:16,761 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:43:16,762 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 16:43:16,762 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:43:16,762 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 16:43:16,762 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-20 16:43:16,772 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-20 16:43:16,772 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 84 places, 95 transitions, 765 flow. Second operand has 8 states, 8 states have (on average 8.5) internal successors, (68), 8 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:43:16,772 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:43:16,772 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-20 16:43:16,772 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:43:17,794 INFO L124 PetriNetUnfolderBase]: 1627/2455 cut-off events. [2024-06-20 16:43:17,795 INFO L125 PetriNetUnfolderBase]: For 14273/14275 co-relation queries the response was YES. [2024-06-20 16:43:17,801 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10930 conditions, 2455 events. 1627/2455 cut-off events. For 14273/14275 co-relation queries the response was YES. Maximal size of possible extension queue 115. Compared 11491 event pairs, 557 based on Foata normal form. 12/2466 useless extension candidates. Maximal degree in co-relation 10891. Up to 2162 conditions per place. [2024-06-20 16:43:17,809 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 80 selfloop transitions, 45 changer transitions 0/129 dead transitions. [2024-06-20 16:43:17,809 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 90 places, 129 transitions, 1150 flow [2024-06-20 16:43:17,828 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 16:43:17,828 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 16:43:17,829 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 128 transitions. [2024-06-20 16:43:17,829 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43537414965986393 [2024-06-20 16:43:17,829 INFO L175 Difference]: Start difference. First operand has 84 places, 95 transitions, 765 flow. Second operand 7 states and 128 transitions. [2024-06-20 16:43:17,829 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 90 places, 129 transitions, 1150 flow [2024-06-20 16:43:17,842 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 85 places, 129 transitions, 1078 flow, removed 4 selfloop flow, removed 5 redundant places. [2024-06-20 16:43:17,844 INFO L231 Difference]: Finished difference. Result has 87 places, 100 transitions, 873 flow [2024-06-20 16:43:17,844 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=695, PETRI_DIFFERENCE_MINUEND_PLACES=79, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=95, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=873, PETRI_PLACES=87, PETRI_TRANSITIONS=100} [2024-06-20 16:43:17,844 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 44 predicate places. [2024-06-20 16:43:17,844 INFO L495 AbstractCegarLoop]: Abstraction has has 87 places, 100 transitions, 873 flow [2024-06-20 16:43:17,845 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.5) internal successors, (68), 8 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:43:17,845 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:43:17,845 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:43:17,845 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-06-20 16:43:17,845 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:43:17,845 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:43:17,846 INFO L85 PathProgramCache]: Analyzing trace with hash 1666127241, now seen corresponding path program 1 times [2024-06-20 16:43:17,846 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:43:17,846 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1661658010] [2024-06-20 16:43:17,846 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:43:17,846 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:43:17,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:43:20,416 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:43:20,416 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:43:20,416 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1661658010] [2024-06-20 16:43:20,417 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1661658010] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:43:20,417 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:43:20,417 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 16:43:20,417 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1898373479] [2024-06-20 16:43:20,417 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:43:20,417 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 16:43:20,418 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:43:20,418 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 16:43:20,418 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-20 16:43:20,443 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-20 16:43:20,443 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 87 places, 100 transitions, 873 flow. Second operand has 9 states, 9 states have (on average 8.444444444444445) internal successors, (76), 9 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:43:20,443 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:43:20,443 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-20 16:43:20,444 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:43:21,331 INFO L124 PetriNetUnfolderBase]: 1619/2443 cut-off events. [2024-06-20 16:43:21,331 INFO L125 PetriNetUnfolderBase]: For 14529/14531 co-relation queries the response was YES. [2024-06-20 16:43:21,336 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11330 conditions, 2443 events. 1619/2443 cut-off events. For 14529/14531 co-relation queries the response was YES. Maximal size of possible extension queue 115. Compared 11307 event pairs, 532 based on Foata normal form. 6/2448 useless extension candidates. Maximal degree in co-relation 11289. Up to 2351 conditions per place. [2024-06-20 16:43:21,342 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 109 selfloop transitions, 11 changer transitions 0/124 dead transitions. [2024-06-20 16:43:21,342 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 92 places, 124 transitions, 1182 flow [2024-06-20 16:43:21,344 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-20 16:43:21,344 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-20 16:43:21,345 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 102 transitions. [2024-06-20 16:43:21,345 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40476190476190477 [2024-06-20 16:43:21,345 INFO L175 Difference]: Start difference. First operand has 87 places, 100 transitions, 873 flow. Second operand 6 states and 102 transitions. [2024-06-20 16:43:21,345 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 92 places, 124 transitions, 1182 flow [2024-06-20 16:43:21,358 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 88 places, 124 transitions, 1101 flow, removed 12 selfloop flow, removed 4 redundant places. [2024-06-20 16:43:21,359 INFO L231 Difference]: Finished difference. Result has 89 places, 102 transitions, 839 flow [2024-06-20 16:43:21,359 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=792, PETRI_DIFFERENCE_MINUEND_PLACES=83, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=100, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=89, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=839, PETRI_PLACES=89, PETRI_TRANSITIONS=102} [2024-06-20 16:43:21,360 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 46 predicate places. [2024-06-20 16:43:21,360 INFO L495 AbstractCegarLoop]: Abstraction has has 89 places, 102 transitions, 839 flow [2024-06-20 16:43:21,360 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.444444444444445) internal successors, (76), 9 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:43:21,360 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:43:21,360 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:43:21,361 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-06-20 16:43:21,361 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:43:21,361 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:43:21,361 INFO L85 PathProgramCache]: Analyzing trace with hash -1036332048, now seen corresponding path program 1 times [2024-06-20 16:43:21,361 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:43:21,361 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [181703898] [2024-06-20 16:43:21,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:43:21,362 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:43:21,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:43:24,814 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:43:24,815 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:43:24,815 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [181703898] [2024-06-20 16:43:24,815 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [181703898] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:43:24,815 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:43:24,815 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 16:43:24,815 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1327573773] [2024-06-20 16:43:24,815 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:43:24,816 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 16:43:24,816 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:43:24,816 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 16:43:24,817 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-20 16:43:24,845 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-20 16:43:24,846 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 89 places, 102 transitions, 839 flow. Second operand has 9 states, 9 states have (on average 8.444444444444445) internal successors, (76), 9 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:43:24,846 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:43:24,846 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-20 16:43:24,846 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:43:26,432 INFO L124 PetriNetUnfolderBase]: 1847/2783 cut-off events. [2024-06-20 16:43:26,432 INFO L125 PetriNetUnfolderBase]: For 18274/18276 co-relation queries the response was YES. [2024-06-20 16:43:26,440 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12722 conditions, 2783 events. 1847/2783 cut-off events. For 18274/18276 co-relation queries the response was YES. Maximal size of possible extension queue 135. Compared 13286 event pairs, 547 based on Foata normal form. 12/2794 useless extension candidates. Maximal degree in co-relation 12680. Up to 2114 conditions per place. [2024-06-20 16:43:26,453 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 109 selfloop transitions, 67 changer transitions 0/180 dead transitions. [2024-06-20 16:43:26,453 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 99 places, 180 transitions, 1573 flow [2024-06-20 16:43:26,454 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-20 16:43:26,454 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-20 16:43:26,454 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 209 transitions. [2024-06-20 16:43:26,455 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4523809523809524 [2024-06-20 16:43:26,455 INFO L175 Difference]: Start difference. First operand has 89 places, 102 transitions, 839 flow. Second operand 11 states and 209 transitions. [2024-06-20 16:43:26,455 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 99 places, 180 transitions, 1573 flow [2024-06-20 16:43:26,470 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 95 places, 180 transitions, 1544 flow, removed 5 selfloop flow, removed 4 redundant places. [2024-06-20 16:43:26,474 INFO L231 Difference]: Finished difference. Result has 98 places, 116 transitions, 1102 flow [2024-06-20 16:43:26,474 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=810, PETRI_DIFFERENCE_MINUEND_PLACES=85, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=102, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=56, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=1102, PETRI_PLACES=98, PETRI_TRANSITIONS=116} [2024-06-20 16:43:26,475 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 55 predicate places. [2024-06-20 16:43:26,475 INFO L495 AbstractCegarLoop]: Abstraction has has 98 places, 116 transitions, 1102 flow [2024-06-20 16:43:26,475 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.444444444444445) internal successors, (76), 9 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:43:26,476 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:43:26,476 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:43:26,476 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-06-20 16:43:26,476 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:43:26,476 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:43:26,476 INFO L85 PathProgramCache]: Analyzing trace with hash -1028589348, now seen corresponding path program 2 times [2024-06-20 16:43:26,476 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:43:26,477 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [611546083] [2024-06-20 16:43:26,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:43:26,477 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:43:26,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:43:29,561 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:43:29,561 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:43:29,561 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [611546083] [2024-06-20 16:43:29,561 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [611546083] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:43:29,561 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:43:29,562 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 16:43:29,562 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1234786669] [2024-06-20 16:43:29,562 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:43:29,562 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 16:43:29,562 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:43:29,563 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 16:43:29,563 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-20 16:43:29,575 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-20 16:43:29,575 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 98 places, 116 transitions, 1102 flow. Second operand has 9 states, 9 states have (on average 8.444444444444445) internal successors, (76), 9 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:43:29,576 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:43:29,576 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-20 16:43:29,576 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:43:31,038 INFO L124 PetriNetUnfolderBase]: 2016/3048 cut-off events. [2024-06-20 16:43:31,038 INFO L125 PetriNetUnfolderBase]: For 25135/25137 co-relation queries the response was YES. [2024-06-20 16:43:31,045 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15507 conditions, 3048 events. 2016/3048 cut-off events. For 25135/25137 co-relation queries the response was YES. Maximal size of possible extension queue 150. Compared 14793 event pairs, 601 based on Foata normal form. 12/3059 useless extension candidates. Maximal degree in co-relation 15462. Up to 2531 conditions per place. [2024-06-20 16:43:31,053 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 127 selfloop transitions, 56 changer transitions 0/187 dead transitions. [2024-06-20 16:43:31,053 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 107 places, 187 transitions, 1870 flow [2024-06-20 16:43:31,054 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 16:43:31,054 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 16:43:31,054 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 193 transitions. [2024-06-20 16:43:31,055 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4595238095238095 [2024-06-20 16:43:31,055 INFO L175 Difference]: Start difference. First operand has 98 places, 116 transitions, 1102 flow. Second operand 10 states and 193 transitions. [2024-06-20 16:43:31,055 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 107 places, 187 transitions, 1870 flow [2024-06-20 16:43:31,077 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 101 places, 187 transitions, 1723 flow, removed 36 selfloop flow, removed 6 redundant places. [2024-06-20 16:43:31,079 INFO L231 Difference]: Finished difference. Result has 103 places, 129 transitions, 1254 flow [2024-06-20 16:43:31,079 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=974, PETRI_DIFFERENCE_MINUEND_PLACES=92, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=116, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=47, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=64, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1254, PETRI_PLACES=103, PETRI_TRANSITIONS=129} [2024-06-20 16:43:31,080 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 60 predicate places. [2024-06-20 16:43:31,080 INFO L495 AbstractCegarLoop]: Abstraction has has 103 places, 129 transitions, 1254 flow [2024-06-20 16:43:31,080 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.444444444444445) internal successors, (76), 9 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:43:31,080 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:43:31,080 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:43:31,080 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-06-20 16:43:31,080 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:43:31,081 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:43:31,081 INFO L85 PathProgramCache]: Analyzing trace with hash 1623535496, now seen corresponding path program 3 times [2024-06-20 16:43:31,081 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:43:31,081 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1451018845] [2024-06-20 16:43:31,081 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:43:31,081 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:43:31,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:43:33,961 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:43:33,961 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:43:33,961 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1451018845] [2024-06-20 16:43:33,961 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1451018845] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:43:33,962 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:43:33,962 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 16:43:33,962 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [832017921] [2024-06-20 16:43:33,962 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:43:33,962 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 16:43:33,962 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:43:33,963 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 16:43:33,963 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-20 16:43:33,980 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-20 16:43:33,988 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 103 places, 129 transitions, 1254 flow. Second operand has 9 states, 9 states have (on average 8.444444444444445) internal successors, (76), 9 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:43:33,988 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:43:33,988 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-20 16:43:33,988 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:43:35,677 INFO L124 PetriNetUnfolderBase]: 2028/3082 cut-off events. [2024-06-20 16:43:35,677 INFO L125 PetriNetUnfolderBase]: For 28601/28603 co-relation queries the response was YES. [2024-06-20 16:43:35,686 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16250 conditions, 3082 events. 2028/3082 cut-off events. For 28601/28603 co-relation queries the response was YES. Maximal size of possible extension queue 151. Compared 15134 event pairs, 590 based on Foata normal form. 12/3093 useless extension candidates. Maximal degree in co-relation 16202. Up to 2544 conditions per place. [2024-06-20 16:43:35,694 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 133 selfloop transitions, 62 changer transitions 0/199 dead transitions. [2024-06-20 16:43:35,695 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 114 places, 199 transitions, 1938 flow [2024-06-20 16:43:35,716 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-20 16:43:35,716 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-20 16:43:35,718 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 224 transitions. [2024-06-20 16:43:35,718 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4444444444444444 [2024-06-20 16:43:35,718 INFO L175 Difference]: Start difference. First operand has 103 places, 129 transitions, 1254 flow. Second operand 12 states and 224 transitions. [2024-06-20 16:43:35,718 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 114 places, 199 transitions, 1938 flow [2024-06-20 16:43:35,748 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 108 places, 199 transitions, 1845 flow, removed 18 selfloop flow, removed 6 redundant places. [2024-06-20 16:43:35,753 INFO L231 Difference]: Finished difference. Result has 109 places, 133 transitions, 1350 flow [2024-06-20 16:43:35,754 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1161, PETRI_DIFFERENCE_MINUEND_PLACES=97, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=129, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=58, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=70, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=1350, PETRI_PLACES=109, PETRI_TRANSITIONS=133} [2024-06-20 16:43:35,755 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 66 predicate places. [2024-06-20 16:43:35,755 INFO L495 AbstractCegarLoop]: Abstraction has has 109 places, 133 transitions, 1350 flow [2024-06-20 16:43:35,755 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.444444444444445) internal successors, (76), 9 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:43:35,755 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:43:35,755 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:43:35,755 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-06-20 16:43:35,755 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:43:35,756 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:43:35,756 INFO L85 PathProgramCache]: Analyzing trace with hash 1325949594, now seen corresponding path program 4 times [2024-06-20 16:43:35,756 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:43:35,756 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1937666689] [2024-06-20 16:43:35,756 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:43:35,756 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:43:35,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:43:38,801 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:43:38,801 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:43:38,801 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1937666689] [2024-06-20 16:43:38,801 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1937666689] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:43:38,802 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:43:38,802 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 16:43:38,802 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1064734860] [2024-06-20 16:43:38,802 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:43:38,802 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 16:43:38,802 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:43:38,802 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 16:43:38,802 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-20 16:43:38,820 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-20 16:43:38,821 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 109 places, 133 transitions, 1350 flow. Second operand has 9 states, 9 states have (on average 8.444444444444445) internal successors, (76), 9 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:43:38,821 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:43:38,821 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-20 16:43:38,821 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:43:40,209 INFO L124 PetriNetUnfolderBase]: 2240/3422 cut-off events. [2024-06-20 16:43:40,209 INFO L125 PetriNetUnfolderBase]: For 34528/34530 co-relation queries the response was YES. [2024-06-20 16:43:40,221 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18661 conditions, 3422 events. 2240/3422 cut-off events. For 34528/34530 co-relation queries the response was YES. Maximal size of possible extension queue 179. Compared 17287 event pairs, 564 based on Foata normal form. 12/3433 useless extension candidates. Maximal degree in co-relation 18611. Up to 2604 conditions per place. [2024-06-20 16:43:40,241 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 118 selfloop transitions, 84 changer transitions 0/206 dead transitions. [2024-06-20 16:43:40,242 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 117 places, 206 transitions, 2282 flow [2024-06-20 16:43:40,242 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 16:43:40,243 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 16:43:40,243 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 172 transitions. [2024-06-20 16:43:40,243 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.455026455026455 [2024-06-20 16:43:40,243 INFO L175 Difference]: Start difference. First operand has 109 places, 133 transitions, 1350 flow. Second operand 9 states and 172 transitions. [2024-06-20 16:43:40,244 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 117 places, 206 transitions, 2282 flow [2024-06-20 16:43:40,280 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 107 places, 206 transitions, 2092 flow, removed 19 selfloop flow, removed 10 redundant places. [2024-06-20 16:43:40,282 INFO L231 Difference]: Finished difference. Result has 110 places, 157 transitions, 1746 flow [2024-06-20 16:43:40,282 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1198, PETRI_DIFFERENCE_MINUEND_PLACES=99, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=133, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=61, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1746, PETRI_PLACES=110, PETRI_TRANSITIONS=157} [2024-06-20 16:43:40,283 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 67 predicate places. [2024-06-20 16:43:40,283 INFO L495 AbstractCegarLoop]: Abstraction has has 110 places, 157 transitions, 1746 flow [2024-06-20 16:43:40,283 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.444444444444445) internal successors, (76), 9 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:43:40,283 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:43:40,283 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:43:40,284 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-06-20 16:43:40,284 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:43:40,284 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:43:40,284 INFO L85 PathProgramCache]: Analyzing trace with hash 110061292, now seen corresponding path program 5 times [2024-06-20 16:43:40,284 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:43:40,284 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1328344387] [2024-06-20 16:43:40,284 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:43:40,285 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:43:40,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:43:43,121 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:43:43,121 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:43:43,121 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1328344387] [2024-06-20 16:43:43,121 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1328344387] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:43:43,121 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:43:43,121 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 16:43:43,122 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [201272264] [2024-06-20 16:43:43,122 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:43:43,122 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 16:43:43,122 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:43:43,122 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 16:43:43,122 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-20 16:43:43,137 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-20 16:43:43,137 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 110 places, 157 transitions, 1746 flow. Second operand has 9 states, 9 states have (on average 8.444444444444445) internal successors, (76), 9 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:43:43,137 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:43:43,137 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-20 16:43:43,137 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:43:44,634 INFO L124 PetriNetUnfolderBase]: 2230/3424 cut-off events. [2024-06-20 16:43:44,635 INFO L125 PetriNetUnfolderBase]: For 38135/38156 co-relation queries the response was YES. [2024-06-20 16:43:44,646 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19440 conditions, 3424 events. 2230/3424 cut-off events. For 38135/38156 co-relation queries the response was YES. Maximal size of possible extension queue 180. Compared 17407 event pairs, 661 based on Foata normal form. 25/3448 useless extension candidates. Maximal degree in co-relation 19387. Up to 2948 conditions per place. [2024-06-20 16:43:44,660 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 172 selfloop transitions, 45 changer transitions 0/221 dead transitions. [2024-06-20 16:43:44,660 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 118 places, 221 transitions, 2585 flow [2024-06-20 16:43:44,661 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 16:43:44,661 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 16:43:44,662 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 159 transitions. [2024-06-20 16:43:44,663 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42063492063492064 [2024-06-20 16:43:44,663 INFO L175 Difference]: Start difference. First operand has 110 places, 157 transitions, 1746 flow. Second operand 9 states and 159 transitions. [2024-06-20 16:43:44,663 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 118 places, 221 transitions, 2585 flow [2024-06-20 16:43:44,720 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 114 places, 221 transitions, 2480 flow, removed 27 selfloop flow, removed 4 redundant places. [2024-06-20 16:43:44,723 INFO L231 Difference]: Finished difference. Result has 117 places, 175 transitions, 2029 flow [2024-06-20 16:43:44,723 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1657, PETRI_DIFFERENCE_MINUEND_PLACES=106, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=157, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=113, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2029, PETRI_PLACES=117, PETRI_TRANSITIONS=175} [2024-06-20 16:43:44,723 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 74 predicate places. [2024-06-20 16:43:44,724 INFO L495 AbstractCegarLoop]: Abstraction has has 117 places, 175 transitions, 2029 flow [2024-06-20 16:43:44,724 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.444444444444445) internal successors, (76), 9 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:43:44,724 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:43:44,724 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:43:44,724 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-06-20 16:43:44,724 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:43:44,725 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:43:44,725 INFO L85 PathProgramCache]: Analyzing trace with hash 407465992, now seen corresponding path program 6 times [2024-06-20 16:43:44,725 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:43:44,725 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1794193560] [2024-06-20 16:43:44,725 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:43:44,725 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:43:44,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:43:47,473 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:43:47,473 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:43:47,473 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1794193560] [2024-06-20 16:43:47,473 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1794193560] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:43:47,473 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:43:47,473 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 16:43:47,473 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [728054275] [2024-06-20 16:43:47,473 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:43:47,474 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 16:43:47,474 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:43:47,474 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 16:43:47,474 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-20 16:43:47,492 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-20 16:43:47,493 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 117 places, 175 transitions, 2029 flow. Second operand has 9 states, 9 states have (on average 8.444444444444445) internal successors, (76), 9 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:43:47,493 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:43:47,493 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-20 16:43:47,493 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:43:49,016 INFO L124 PetriNetUnfolderBase]: 2210/3388 cut-off events. [2024-06-20 16:43:49,016 INFO L125 PetriNetUnfolderBase]: For 41852/41854 co-relation queries the response was YES. [2024-06-20 16:43:49,030 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19868 conditions, 3388 events. 2210/3388 cut-off events. For 41852/41854 co-relation queries the response was YES. Maximal size of possible extension queue 177. Compared 17190 event pairs, 618 based on Foata normal form. 12/3399 useless extension candidates. Maximal degree in co-relation 19811. Up to 2579 conditions per place. [2024-06-20 16:43:49,042 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 128 selfloop transitions, 94 changer transitions 0/226 dead transitions. [2024-06-20 16:43:49,042 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 125 places, 226 transitions, 2668 flow [2024-06-20 16:43:49,043 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 16:43:49,043 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 16:43:49,044 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 177 transitions. [2024-06-20 16:43:49,045 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46825396825396826 [2024-06-20 16:43:49,045 INFO L175 Difference]: Start difference. First operand has 117 places, 175 transitions, 2029 flow. Second operand 9 states and 177 transitions. [2024-06-20 16:43:49,045 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 125 places, 226 transitions, 2668 flow [2024-06-20 16:43:49,144 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 120 places, 226 transitions, 2546 flow, removed 39 selfloop flow, removed 5 redundant places. [2024-06-20 16:43:49,147 INFO L231 Difference]: Finished difference. Result has 122 places, 176 transitions, 2161 flow [2024-06-20 16:43:49,147 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1907, PETRI_DIFFERENCE_MINUEND_PLACES=112, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=175, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=93, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=81, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2161, PETRI_PLACES=122, PETRI_TRANSITIONS=176} [2024-06-20 16:43:49,148 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 79 predicate places. [2024-06-20 16:43:49,148 INFO L495 AbstractCegarLoop]: Abstraction has has 122 places, 176 transitions, 2161 flow [2024-06-20 16:43:49,148 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.444444444444445) internal successors, (76), 9 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:43:49,148 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:43:49,148 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:43:49,148 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2024-06-20 16:43:49,149 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:43:49,149 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:43:49,149 INFO L85 PathProgramCache]: Analyzing trace with hash -1939650448, now seen corresponding path program 1 times [2024-06-20 16:43:49,149 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:43:49,149 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1420025056] [2024-06-20 16:43:49,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:43:49,149 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:43:49,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:43:52,107 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:43:52,107 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:43:52,107 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1420025056] [2024-06-20 16:43:52,107 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1420025056] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:43:52,107 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:43:52,107 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 16:43:52,108 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [72756761] [2024-06-20 16:43:52,108 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:43:52,109 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 16:43:52,109 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:43:52,110 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 16:43:52,110 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-20 16:43:52,141 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-20 16:43:52,141 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 122 places, 176 transitions, 2161 flow. Second operand has 9 states, 9 states have (on average 8.444444444444445) internal successors, (76), 9 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:43:52,141 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:43:52,141 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-20 16:43:52,141 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:43:53,491 INFO L124 PetriNetUnfolderBase]: 2238/3432 cut-off events. [2024-06-20 16:43:53,491 INFO L125 PetriNetUnfolderBase]: For 46439/46441 co-relation queries the response was YES. [2024-06-20 16:43:53,505 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20903 conditions, 3432 events. 2238/3432 cut-off events. For 46439/46441 co-relation queries the response was YES. Maximal size of possible extension queue 178. Compared 17541 event pairs, 501 based on Foata normal form. 8/3439 useless extension candidates. Maximal degree in co-relation 20844. Up to 2990 conditions per place. [2024-06-20 16:43:53,518 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 173 selfloop transitions, 47 changer transitions 0/224 dead transitions. [2024-06-20 16:43:53,519 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 129 places, 224 transitions, 2895 flow [2024-06-20 16:43:53,519 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 16:43:53,519 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 16:43:53,520 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 149 transitions. [2024-06-20 16:43:53,520 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44345238095238093 [2024-06-20 16:43:53,520 INFO L175 Difference]: Start difference. First operand has 122 places, 176 transitions, 2161 flow. Second operand 8 states and 149 transitions. [2024-06-20 16:43:53,520 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 129 places, 224 transitions, 2895 flow [2024-06-20 16:43:53,655 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 124 places, 224 transitions, 2780 flow, removed 3 selfloop flow, removed 5 redundant places. [2024-06-20 16:43:53,658 INFO L231 Difference]: Finished difference. Result has 125 places, 180 transitions, 2231 flow [2024-06-20 16:43:53,658 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2046, PETRI_DIFFERENCE_MINUEND_PLACES=117, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=176, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=45, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=131, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2231, PETRI_PLACES=125, PETRI_TRANSITIONS=180} [2024-06-20 16:43:53,658 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 82 predicate places. [2024-06-20 16:43:53,658 INFO L495 AbstractCegarLoop]: Abstraction has has 125 places, 180 transitions, 2231 flow [2024-06-20 16:43:53,659 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.444444444444445) internal successors, (76), 9 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:43:53,659 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:43:53,659 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:43:53,659 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2024-06-20 16:43:53,659 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:43:53,660 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:43:53,660 INFO L85 PathProgramCache]: Analyzing trace with hash -1939589998, now seen corresponding path program 2 times [2024-06-20 16:43:53,660 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:43:53,660 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1533303032] [2024-06-20 16:43:53,660 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:43:53,660 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:43:53,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:43:56,795 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:43:56,796 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:43:56,796 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1533303032] [2024-06-20 16:43:56,796 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1533303032] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:43:56,796 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:43:56,796 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 16:43:56,796 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [165143596] [2024-06-20 16:43:56,796 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:43:56,797 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 16:43:56,797 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:43:56,797 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 16:43:56,797 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-20 16:43:56,822 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-20 16:43:56,823 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 125 places, 180 transitions, 2231 flow. Second operand has 9 states, 9 states have (on average 8.444444444444445) internal successors, (76), 9 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:43:56,823 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:43:56,823 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-20 16:43:56,823 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:43:58,160 INFO L124 PetriNetUnfolderBase]: 2266/3482 cut-off events. [2024-06-20 16:43:58,160 INFO L125 PetriNetUnfolderBase]: For 51232/51234 co-relation queries the response was YES. [2024-06-20 16:43:58,172 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21290 conditions, 3482 events. 2266/3482 cut-off events. For 51232/51234 co-relation queries the response was YES. Maximal size of possible extension queue 183. Compared 17820 event pairs, 661 based on Foata normal form. 8/3489 useless extension candidates. Maximal degree in co-relation 21230. Up to 3151 conditions per place. [2024-06-20 16:43:58,183 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 173 selfloop transitions, 45 changer transitions 0/222 dead transitions. [2024-06-20 16:43:58,183 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 132 places, 222 transitions, 2835 flow [2024-06-20 16:43:58,186 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 16:43:58,186 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 16:43:58,186 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 146 transitions. [2024-06-20 16:43:58,186 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43452380952380953 [2024-06-20 16:43:58,186 INFO L175 Difference]: Start difference. First operand has 125 places, 180 transitions, 2231 flow. Second operand 8 states and 146 transitions. [2024-06-20 16:43:58,186 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 132 places, 222 transitions, 2835 flow [2024-06-20 16:43:58,249 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 128 places, 222 transitions, 2729 flow, removed 27 selfloop flow, removed 4 redundant places. [2024-06-20 16:43:58,251 INFO L231 Difference]: Finished difference. Result has 129 places, 182 transitions, 2270 flow [2024-06-20 16:43:58,252 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2137, PETRI_DIFFERENCE_MINUEND_PLACES=121, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=180, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=135, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2270, PETRI_PLACES=129, PETRI_TRANSITIONS=182} [2024-06-20 16:43:58,252 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 86 predicate places. [2024-06-20 16:43:58,252 INFO L495 AbstractCegarLoop]: Abstraction has has 129 places, 182 transitions, 2270 flow [2024-06-20 16:43:58,252 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.444444444444445) internal successors, (76), 9 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:43:58,252 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:43:58,252 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:43:58,253 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2024-06-20 16:43:58,253 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:43:58,253 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:43:58,253 INFO L85 PathProgramCache]: Analyzing trace with hash -1821502318, now seen corresponding path program 3 times [2024-06-20 16:43:58,253 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:43:58,253 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1736071152] [2024-06-20 16:43:58,254 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:43:58,254 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:43:58,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:44:01,325 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:44:01,325 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:44:01,325 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1736071152] [2024-06-20 16:44:01,325 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1736071152] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:44:01,326 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:44:01,326 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 16:44:01,326 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [201612062] [2024-06-20 16:44:01,326 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:44:01,326 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 16:44:01,326 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:44:01,326 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 16:44:01,326 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-20 16:44:01,344 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-20 16:44:01,344 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 129 places, 182 transitions, 2270 flow. Second operand has 9 states, 9 states have (on average 8.444444444444445) internal successors, (76), 9 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:44:01,345 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:44:01,345 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-20 16:44:01,345 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:44:02,687 INFO L124 PetriNetUnfolderBase]: 2294/3508 cut-off events. [2024-06-20 16:44:02,688 INFO L125 PetriNetUnfolderBase]: For 54345/54347 co-relation queries the response was YES. [2024-06-20 16:44:02,702 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21606 conditions, 3508 events. 2294/3508 cut-off events. For 54345/54347 co-relation queries the response was YES. Maximal size of possible extension queue 183. Compared 17865 event pairs, 655 based on Foata normal form. 8/3515 useless extension candidates. Maximal degree in co-relation 21544. Up to 3249 conditions per place. [2024-06-20 16:44:02,713 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 183 selfloop transitions, 33 changer transitions 0/220 dead transitions. [2024-06-20 16:44:02,713 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 136 places, 220 transitions, 2843 flow [2024-06-20 16:44:02,714 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 16:44:02,714 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 16:44:02,714 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 141 transitions. [2024-06-20 16:44:02,715 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41964285714285715 [2024-06-20 16:44:02,715 INFO L175 Difference]: Start difference. First operand has 129 places, 182 transitions, 2270 flow. Second operand 8 states and 141 transitions. [2024-06-20 16:44:02,715 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 136 places, 220 transitions, 2843 flow [2024-06-20 16:44:02,780 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 130 places, 220 transitions, 2738 flow, removed 9 selfloop flow, removed 6 redundant places. [2024-06-20 16:44:02,784 INFO L231 Difference]: Finished difference. Result has 131 places, 184 transitions, 2280 flow [2024-06-20 16:44:02,784 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2165, PETRI_DIFFERENCE_MINUEND_PLACES=123, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=182, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=149, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2280, PETRI_PLACES=131, PETRI_TRANSITIONS=184} [2024-06-20 16:44:02,784 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 88 predicate places. [2024-06-20 16:44:02,784 INFO L495 AbstractCegarLoop]: Abstraction has has 131 places, 184 transitions, 2280 flow [2024-06-20 16:44:02,785 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.444444444444445) internal successors, (76), 9 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:44:02,785 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:44:02,785 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:44:02,785 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2024-06-20 16:44:02,785 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:44:02,785 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:44:02,785 INFO L85 PathProgramCache]: Analyzing trace with hash -1946050150, now seen corresponding path program 1 times [2024-06-20 16:44:02,785 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:44:02,786 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1334656350] [2024-06-20 16:44:02,786 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:44:02,786 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:44:02,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:44:06,267 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:44:06,268 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:44:06,268 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1334656350] [2024-06-20 16:44:06,268 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1334656350] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:44:06,268 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:44:06,268 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 16:44:06,268 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [624456948] [2024-06-20 16:44:06,268 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:44:06,269 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 16:44:06,269 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:44:06,269 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 16:44:06,269 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-20 16:44:06,309 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-20 16:44:06,309 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 131 places, 184 transitions, 2280 flow. Second operand has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:44:06,309 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:44:06,309 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-20 16:44:06,310 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:44:07,828 INFO L124 PetriNetUnfolderBase]: 2382/3601 cut-off events. [2024-06-20 16:44:07,829 INFO L125 PetriNetUnfolderBase]: For 62059/62061 co-relation queries the response was YES. [2024-06-20 16:44:07,841 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22272 conditions, 3601 events. 2382/3601 cut-off events. For 62059/62061 co-relation queries the response was YES. Maximal size of possible extension queue 184. Compared 18068 event pairs, 596 based on Foata normal form. 20/3620 useless extension candidates. Maximal degree in co-relation 22209. Up to 3118 conditions per place. [2024-06-20 16:44:07,852 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 183 selfloop transitions, 54 changer transitions 0/241 dead transitions. [2024-06-20 16:44:07,853 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 140 places, 241 transitions, 3027 flow [2024-06-20 16:44:07,854 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 16:44:07,854 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 16:44:07,854 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 186 transitions. [2024-06-20 16:44:07,854 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44285714285714284 [2024-06-20 16:44:07,854 INFO L175 Difference]: Start difference. First operand has 131 places, 184 transitions, 2280 flow. Second operand 10 states and 186 transitions. [2024-06-20 16:44:07,855 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 140 places, 241 transitions, 3027 flow [2024-06-20 16:44:07,920 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 134 places, 241 transitions, 2944 flow, removed 11 selfloop flow, removed 6 redundant places. [2024-06-20 16:44:07,923 INFO L231 Difference]: Finished difference. Result has 135 places, 187 transitions, 2373 flow [2024-06-20 16:44:07,923 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2197, PETRI_DIFFERENCE_MINUEND_PLACES=125, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=184, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=51, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=130, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2373, PETRI_PLACES=135, PETRI_TRANSITIONS=187} [2024-06-20 16:44:07,923 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 92 predicate places. [2024-06-20 16:44:07,923 INFO L495 AbstractCegarLoop]: Abstraction has has 135 places, 187 transitions, 2373 flow [2024-06-20 16:44:07,924 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:44:07,924 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:44:07,924 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:44:07,924 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2024-06-20 16:44:07,924 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:44:07,924 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:44:07,924 INFO L85 PathProgramCache]: Analyzing trace with hash -1845412128, now seen corresponding path program 4 times [2024-06-20 16:44:07,925 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:44:07,925 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1346640623] [2024-06-20 16:44:07,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:44:07,925 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:44:07,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:44:10,724 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:44:10,724 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:44:10,725 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1346640623] [2024-06-20 16:44:10,725 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1346640623] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:44:10,725 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:44:10,725 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 16:44:10,725 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1958902442] [2024-06-20 16:44:10,725 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:44:10,725 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 16:44:10,726 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:44:10,726 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 16:44:10,726 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-20 16:44:10,771 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-20 16:44:10,772 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 135 places, 187 transitions, 2373 flow. Second operand has 9 states, 9 states have (on average 8.444444444444445) internal successors, (76), 9 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:44:10,772 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:44:10,772 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-20 16:44:10,772 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:44:12,167 INFO L124 PetriNetUnfolderBase]: 2369/3629 cut-off events. [2024-06-20 16:44:12,167 INFO L125 PetriNetUnfolderBase]: For 63780/63782 co-relation queries the response was YES. [2024-06-20 16:44:12,181 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22748 conditions, 3629 events. 2369/3629 cut-off events. For 63780/63782 co-relation queries the response was YES. Maximal size of possible extension queue 185. Compared 18708 event pairs, 516 based on Foata normal form. 8/3636 useless extension candidates. Maximal degree in co-relation 22684. Up to 3250 conditions per place. [2024-06-20 16:44:12,194 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 171 selfloop transitions, 46 changer transitions 0/221 dead transitions. [2024-06-20 16:44:12,194 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 141 places, 221 transitions, 2905 flow [2024-06-20 16:44:12,195 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 16:44:12,195 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 16:44:12,195 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 131 transitions. [2024-06-20 16:44:12,195 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.445578231292517 [2024-06-20 16:44:12,196 INFO L175 Difference]: Start difference. First operand has 135 places, 187 transitions, 2373 flow. Second operand 7 states and 131 transitions. [2024-06-20 16:44:12,196 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 141 places, 221 transitions, 2905 flow [2024-06-20 16:44:12,289 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 133 places, 221 transitions, 2749 flow, removed 28 selfloop flow, removed 8 redundant places. [2024-06-20 16:44:12,292 INFO L231 Difference]: Finished difference. Result has 134 places, 187 transitions, 2326 flow [2024-06-20 16:44:12,292 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2217, PETRI_DIFFERENCE_MINUEND_PLACES=127, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=187, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=141, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2326, PETRI_PLACES=134, PETRI_TRANSITIONS=187} [2024-06-20 16:44:12,293 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 91 predicate places. [2024-06-20 16:44:12,293 INFO L495 AbstractCegarLoop]: Abstraction has has 134 places, 187 transitions, 2326 flow [2024-06-20 16:44:12,293 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.444444444444445) internal successors, (76), 9 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:44:12,293 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:44:12,293 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:44:12,293 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2024-06-20 16:44:12,294 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:44:12,294 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:44:12,294 INFO L85 PathProgramCache]: Analyzing trace with hash -1845227430, now seen corresponding path program 2 times [2024-06-20 16:44:12,294 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:44:12,294 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1158656336] [2024-06-20 16:44:12,294 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:44:12,294 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:44:12,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:44:15,519 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:44:15,519 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:44:15,519 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1158656336] [2024-06-20 16:44:15,519 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1158656336] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:44:15,519 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:44:15,519 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 16:44:15,519 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1454710430] [2024-06-20 16:44:15,519 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:44:15,519 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 16:44:15,520 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:44:15,520 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 16:44:15,520 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-20 16:44:15,560 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-20 16:44:15,560 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 134 places, 187 transitions, 2326 flow. Second operand has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:44:15,560 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:44:15,560 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-20 16:44:15,560 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:44:16,702 INFO L124 PetriNetUnfolderBase]: 2457/3724 cut-off events. [2024-06-20 16:44:16,702 INFO L125 PetriNetUnfolderBase]: For 70902/70904 co-relation queries the response was YES. [2024-06-20 16:44:16,716 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23254 conditions, 3724 events. 2457/3724 cut-off events. For 70902/70904 co-relation queries the response was YES. Maximal size of possible extension queue 187. Compared 18929 event pairs, 590 based on Foata normal form. 20/3743 useless extension candidates. Maximal degree in co-relation 23189. Up to 3139 conditions per place. [2024-06-20 16:44:16,728 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 169 selfloop transitions, 57 changer transitions 0/230 dead transitions. [2024-06-20 16:44:16,728 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 141 places, 230 transitions, 2984 flow [2024-06-20 16:44:16,729 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 16:44:16,729 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 16:44:16,730 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 149 transitions. [2024-06-20 16:44:16,730 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44345238095238093 [2024-06-20 16:44:16,730 INFO L175 Difference]: Start difference. First operand has 134 places, 187 transitions, 2326 flow. Second operand 8 states and 149 transitions. [2024-06-20 16:44:16,730 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 141 places, 230 transitions, 2984 flow [2024-06-20 16:44:16,809 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 135 places, 230 transitions, 2879 flow, removed 5 selfloop flow, removed 6 redundant places. [2024-06-20 16:44:16,811 INFO L231 Difference]: Finished difference. Result has 136 places, 190 transitions, 2417 flow [2024-06-20 16:44:16,811 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2223, PETRI_DIFFERENCE_MINUEND_PLACES=128, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=187, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=54, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=130, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2417, PETRI_PLACES=136, PETRI_TRANSITIONS=190} [2024-06-20 16:44:16,812 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 93 predicate places. [2024-06-20 16:44:16,812 INFO L495 AbstractCegarLoop]: Abstraction has has 136 places, 190 transitions, 2417 flow [2024-06-20 16:44:16,812 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:44:16,812 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:44:16,812 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:44:16,813 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2024-06-20 16:44:16,813 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:44:16,813 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:44:16,813 INFO L85 PathProgramCache]: Analyzing trace with hash -882828488, now seen corresponding path program 3 times [2024-06-20 16:44:16,813 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:44:16,813 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1830868611] [2024-06-20 16:44:16,813 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:44:16,814 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:44:16,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:44:19,982 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:44:19,983 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:44:19,983 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1830868611] [2024-06-20 16:44:19,983 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1830868611] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:44:19,983 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:44:19,983 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 16:44:19,983 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1426392269] [2024-06-20 16:44:19,983 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:44:19,984 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 16:44:19,984 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:44:19,984 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 16:44:19,984 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-20 16:44:19,993 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-20 16:44:19,994 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 136 places, 190 transitions, 2417 flow. Second operand has 9 states, 9 states have (on average 8.555555555555555) internal successors, (77), 9 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:44:19,994 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:44:19,994 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-20 16:44:19,994 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:44:21,123 INFO L124 PetriNetUnfolderBase]: 2477/3817 cut-off events. [2024-06-20 16:44:21,123 INFO L125 PetriNetUnfolderBase]: For 68670/68693 co-relation queries the response was YES. [2024-06-20 16:44:21,139 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24024 conditions, 3817 events. 2477/3817 cut-off events. For 68670/68693 co-relation queries the response was YES. Maximal size of possible extension queue 190. Compared 19842 event pairs, 659 based on Foata normal form. 27/3843 useless extension candidates. Maximal degree in co-relation 23958. Up to 3500 conditions per place. [2024-06-20 16:44:21,153 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 193 selfloop transitions, 24 changer transitions 0/221 dead transitions. [2024-06-20 16:44:21,153 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 142 places, 221 transitions, 2959 flow [2024-06-20 16:44:21,154 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 16:44:21,154 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 16:44:21,155 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 120 transitions. [2024-06-20 16:44:21,155 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40816326530612246 [2024-06-20 16:44:21,155 INFO L175 Difference]: Start difference. First operand has 136 places, 190 transitions, 2417 flow. Second operand 7 states and 120 transitions. [2024-06-20 16:44:21,155 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 142 places, 221 transitions, 2959 flow [2024-06-20 16:44:21,241 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 136 places, 221 transitions, 2805 flow, removed 27 selfloop flow, removed 6 redundant places. [2024-06-20 16:44:21,244 INFO L231 Difference]: Finished difference. Result has 137 places, 192 transitions, 2354 flow [2024-06-20 16:44:21,244 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2267, PETRI_DIFFERENCE_MINUEND_PLACES=130, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=190, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=166, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2354, PETRI_PLACES=137, PETRI_TRANSITIONS=192} [2024-06-20 16:44:21,244 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 94 predicate places. [2024-06-20 16:44:21,244 INFO L495 AbstractCegarLoop]: Abstraction has has 137 places, 192 transitions, 2354 flow [2024-06-20 16:44:21,245 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.555555555555555) internal successors, (77), 9 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:44:21,245 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:44:21,245 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:44:21,245 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2024-06-20 16:44:21,245 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:44:21,245 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:44:21,245 INFO L85 PathProgramCache]: Analyzing trace with hash -1838732310, now seen corresponding path program 4 times [2024-06-20 16:44:21,246 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:44:21,246 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1569609108] [2024-06-20 16:44:21,246 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:44:21,246 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:44:21,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:44:24,449 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:44:24,450 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:44:24,450 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1569609108] [2024-06-20 16:44:24,450 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1569609108] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:44:24,450 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:44:24,450 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 16:44:24,450 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2005995568] [2024-06-20 16:44:24,450 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:44:24,450 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 16:44:24,450 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:44:24,451 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 16:44:24,451 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-20 16:44:24,483 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-20 16:44:24,483 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 137 places, 192 transitions, 2354 flow. Second operand has 9 states, 9 states have (on average 8.555555555555555) internal successors, (77), 9 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:44:24,483 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:44:24,483 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-20 16:44:24,483 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:44:25,683 INFO L124 PetriNetUnfolderBase]: 2469/3797 cut-off events. [2024-06-20 16:44:25,684 INFO L125 PetriNetUnfolderBase]: For 66247/66270 co-relation queries the response was YES. [2024-06-20 16:44:25,700 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23445 conditions, 3797 events. 2469/3797 cut-off events. For 66247/66270 co-relation queries the response was YES. Maximal size of possible extension queue 189. Compared 19691 event pairs, 619 based on Foata normal form. 27/3823 useless extension candidates. Maximal degree in co-relation 23378. Up to 3394 conditions per place. [2024-06-20 16:44:25,712 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 190 selfloop transitions, 31 changer transitions 0/225 dead transitions. [2024-06-20 16:44:25,712 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 143 places, 225 transitions, 2924 flow [2024-06-20 16:44:25,713 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 16:44:25,713 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 16:44:25,714 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 120 transitions. [2024-06-20 16:44:25,714 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40816326530612246 [2024-06-20 16:44:25,714 INFO L175 Difference]: Start difference. First operand has 137 places, 192 transitions, 2354 flow. Second operand 7 states and 120 transitions. [2024-06-20 16:44:25,714 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 143 places, 225 transitions, 2924 flow [2024-06-20 16:44:25,786 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 138 places, 225 transitions, 2855 flow, removed 12 selfloop flow, removed 5 redundant places. [2024-06-20 16:44:25,789 INFO L231 Difference]: Finished difference. Result has 140 places, 196 transitions, 2426 flow [2024-06-20 16:44:25,789 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2285, PETRI_DIFFERENCE_MINUEND_PLACES=132, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=192, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=161, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2426, PETRI_PLACES=140, PETRI_TRANSITIONS=196} [2024-06-20 16:44:25,789 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 97 predicate places. [2024-06-20 16:44:25,789 INFO L495 AbstractCegarLoop]: Abstraction has has 140 places, 196 transitions, 2426 flow [2024-06-20 16:44:25,790 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.555555555555555) internal successors, (77), 9 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:44:25,790 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:44:25,790 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:44:25,790 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2024-06-20 16:44:25,790 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:44:25,790 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:44:25,791 INFO L85 PathProgramCache]: Analyzing trace with hash -968757920, now seen corresponding path program 1 times [2024-06-20 16:44:25,791 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:44:25,791 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [409837487] [2024-06-20 16:44:25,791 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:44:25,791 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:44:25,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:44:27,729 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:44:27,730 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:44:27,730 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [409837487] [2024-06-20 16:44:27,730 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [409837487] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:44:27,730 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:44:27,730 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 16:44:27,730 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [837115617] [2024-06-20 16:44:27,730 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:44:27,732 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 16:44:27,733 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:44:27,733 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 16:44:27,733 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-20 16:44:27,778 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-20 16:44:27,779 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 140 places, 196 transitions, 2426 flow. Second operand has 7 states, 7 states have (on average 10.142857142857142) internal successors, (71), 7 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) [2024-06-20 16:44:27,779 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:44:27,779 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-20 16:44:27,779 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:44:28,846 INFO L124 PetriNetUnfolderBase]: 2446/3762 cut-off events. [2024-06-20 16:44:28,846 INFO L125 PetriNetUnfolderBase]: For 71652/71674 co-relation queries the response was YES. [2024-06-20 16:44:28,861 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23804 conditions, 3762 events. 2446/3762 cut-off events. For 71652/71674 co-relation queries the response was YES. Maximal size of possible extension queue 186. Compared 19421 event pairs, 622 based on Foata normal form. 28/3776 useless extension candidates. Maximal degree in co-relation 23735. Up to 3495 conditions per place. [2024-06-20 16:44:28,872 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 191 selfloop transitions, 21 changer transitions 0/224 dead transitions. [2024-06-20 16:44:28,872 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 145 places, 224 transitions, 3040 flow [2024-06-20 16:44:28,873 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-20 16:44:28,873 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-20 16:44:28,873 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 109 transitions. [2024-06-20 16:44:28,873 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43253968253968256 [2024-06-20 16:44:28,874 INFO L175 Difference]: Start difference. First operand has 140 places, 196 transitions, 2426 flow. Second operand 6 states and 109 transitions. [2024-06-20 16:44:28,874 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 145 places, 224 transitions, 3040 flow [2024-06-20 16:44:28,954 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 141 places, 224 transitions, 2957 flow, removed 18 selfloop flow, removed 4 redundant places. [2024-06-20 16:44:28,961 INFO L231 Difference]: Finished difference. Result has 143 places, 204 transitions, 2512 flow [2024-06-20 16:44:28,962 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2343, PETRI_DIFFERENCE_MINUEND_PLACES=136, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=196, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=178, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2512, PETRI_PLACES=143, PETRI_TRANSITIONS=204} [2024-06-20 16:44:28,962 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 100 predicate places. [2024-06-20 16:44:28,962 INFO L495 AbstractCegarLoop]: Abstraction has has 143 places, 204 transitions, 2512 flow [2024-06-20 16:44:28,963 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 10.142857142857142) internal successors, (71), 7 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) [2024-06-20 16:44:28,963 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:44:28,963 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:44:28,963 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2024-06-20 16:44:28,963 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:44:28,965 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:44:28,965 INFO L85 PathProgramCache]: Analyzing trace with hash 379583, now seen corresponding path program 1 times [2024-06-20 16:44:28,965 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:44:28,965 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1556832293] [2024-06-20 16:44:28,965 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:44:28,965 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:44:28,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:44:32,965 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:44:32,965 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:44:32,965 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1556832293] [2024-06-20 16:44:32,966 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1556832293] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:44:32,966 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:44:32,966 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 16:44:32,966 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [956637993] [2024-06-20 16:44:32,966 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:44:32,966 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 16:44:32,966 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:44:32,966 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 16:44:32,966 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-20 16:44:33,029 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-20 16:44:33,029 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 143 places, 204 transitions, 2512 flow. Second operand has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:44:33,029 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:44:33,029 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-20 16:44:33,029 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:44:35,188 INFO L124 PetriNetUnfolderBase]: 3587/5595 cut-off events. [2024-06-20 16:44:35,188 INFO L125 PetriNetUnfolderBase]: For 141682/141684 co-relation queries the response was YES. [2024-06-20 16:44:35,213 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34893 conditions, 5595 events. 3587/5595 cut-off events. For 141682/141684 co-relation queries the response was YES. Maximal size of possible extension queue 272. Compared 31803 event pairs, 748 based on Foata normal form. 66/5660 useless extension candidates. Maximal degree in co-relation 34822. Up to 2330 conditions per place. [2024-06-20 16:44:35,231 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 187 selfloop transitions, 117 changer transitions 0/308 dead transitions. [2024-06-20 16:44:35,231 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 153 places, 308 transitions, 3915 flow [2024-06-20 16:44:35,232 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-20 16:44:35,232 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-20 16:44:35,232 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 230 transitions. [2024-06-20 16:44:35,233 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49783549783549785 [2024-06-20 16:44:35,233 INFO L175 Difference]: Start difference. First operand has 143 places, 204 transitions, 2512 flow. Second operand 11 states and 230 transitions. [2024-06-20 16:44:35,233 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 153 places, 308 transitions, 3915 flow [2024-06-20 16:44:35,374 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 151 places, 308 transitions, 3854 flow, removed 25 selfloop flow, removed 2 redundant places. [2024-06-20 16:44:35,378 INFO L231 Difference]: Finished difference. Result has 154 places, 213 transitions, 2927 flow [2024-06-20 16:44:35,378 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2451, PETRI_DIFFERENCE_MINUEND_PLACES=141, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=204, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=110, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=89, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=2927, PETRI_PLACES=154, PETRI_TRANSITIONS=213} [2024-06-20 16:44:35,381 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 111 predicate places. [2024-06-20 16:44:35,381 INFO L495 AbstractCegarLoop]: Abstraction has has 154 places, 213 transitions, 2927 flow [2024-06-20 16:44:35,381 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:44:35,382 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:44:35,382 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:44:35,382 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2024-06-20 16:44:35,382 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:44:35,382 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:44:35,382 INFO L85 PathProgramCache]: Analyzing trace with hash 517352079, now seen corresponding path program 2 times [2024-06-20 16:44:35,382 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:44:35,383 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [136343617] [2024-06-20 16:44:35,383 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:44:35,391 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:44:35,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:44:38,767 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:44:38,767 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:44:38,767 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [136343617] [2024-06-20 16:44:38,767 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [136343617] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:44:38,768 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:44:38,768 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 16:44:38,768 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [504641867] [2024-06-20 16:44:38,768 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:44:38,768 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 16:44:38,768 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:44:38,769 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 16:44:38,769 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-20 16:44:38,782 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-20 16:44:38,783 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 154 places, 213 transitions, 2927 flow. Second operand has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:44:38,783 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:44:38,783 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-20 16:44:38,783 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:44:40,876 INFO L124 PetriNetUnfolderBase]: 3899/6119 cut-off events. [2024-06-20 16:44:40,877 INFO L125 PetriNetUnfolderBase]: For 166339/166341 co-relation queries the response was YES. [2024-06-20 16:44:40,902 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38638 conditions, 6119 events. 3899/6119 cut-off events. For 166339/166341 co-relation queries the response was YES. Maximal size of possible extension queue 296. Compared 35773 event pairs, 1285 based on Foata normal form. 76/6194 useless extension candidates. Maximal degree in co-relation 38563. Up to 4557 conditions per place. [2024-06-20 16:44:40,921 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 167 selfloop transitions, 116 changer transitions 0/287 dead transitions. [2024-06-20 16:44:40,921 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 165 places, 287 transitions, 3892 flow [2024-06-20 16:44:40,922 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-20 16:44:40,922 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-20 16:44:40,922 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 230 transitions. [2024-06-20 16:44:40,935 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45634920634920634 [2024-06-20 16:44:40,935 INFO L175 Difference]: Start difference. First operand has 154 places, 213 transitions, 2927 flow. Second operand 12 states and 230 transitions. [2024-06-20 16:44:40,936 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 165 places, 287 transitions, 3892 flow [2024-06-20 16:44:41,120 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 160 places, 287 transitions, 3675 flow, removed 48 selfloop flow, removed 5 redundant places. [2024-06-20 16:44:41,123 INFO L231 Difference]: Finished difference. Result has 161 places, 215 transitions, 3012 flow [2024-06-20 16:44:41,123 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2716, PETRI_DIFFERENCE_MINUEND_PLACES=149, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=213, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=114, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=97, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=3012, PETRI_PLACES=161, PETRI_TRANSITIONS=215} [2024-06-20 16:44:41,125 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 118 predicate places. [2024-06-20 16:44:41,125 INFO L495 AbstractCegarLoop]: Abstraction has has 161 places, 215 transitions, 3012 flow [2024-06-20 16:44:41,125 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:44:41,126 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:44:41,126 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:44:41,126 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2024-06-20 16:44:41,126 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:44:41,128 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:44:41,128 INFO L85 PathProgramCache]: Analyzing trace with hash 88945343, now seen corresponding path program 3 times [2024-06-20 16:44:41,128 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:44:41,128 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2055309598] [2024-06-20 16:44:41,128 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:44:41,128 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:44:41,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:44:44,541 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:44:44,541 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:44:44,541 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2055309598] [2024-06-20 16:44:44,541 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2055309598] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:44:44,541 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:44:44,541 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 16:44:44,542 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [51818850] [2024-06-20 16:44:44,542 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:44:44,542 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 16:44:44,542 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:44:44,542 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 16:44:44,543 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-20 16:44:44,564 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-20 16:44:44,565 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 161 places, 215 transitions, 3012 flow. Second operand has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:44:44,565 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:44:44,565 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-20 16:44:44,565 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:44:46,848 INFO L124 PetriNetUnfolderBase]: 4452/7018 cut-off events. [2024-06-20 16:44:46,849 INFO L125 PetriNetUnfolderBase]: For 193123/193125 co-relation queries the response was YES. [2024-06-20 16:44:46,878 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43841 conditions, 7018 events. 4452/7018 cut-off events. For 193123/193125 co-relation queries the response was YES. Maximal size of possible extension queue 338. Compared 42629 event pairs, 1425 based on Foata normal form. 66/7083 useless extension candidates. Maximal degree in co-relation 43764. Up to 4472 conditions per place. [2024-06-20 16:44:46,899 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 182 selfloop transitions, 118 changer transitions 0/304 dead transitions. [2024-06-20 16:44:46,900 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 172 places, 304 transitions, 4176 flow [2024-06-20 16:44:46,900 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-20 16:44:46,901 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-20 16:44:46,901 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 241 transitions. [2024-06-20 16:44:46,901 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4781746031746032 [2024-06-20 16:44:46,901 INFO L175 Difference]: Start difference. First operand has 161 places, 215 transitions, 3012 flow. Second operand 12 states and 241 transitions. [2024-06-20 16:44:46,901 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 172 places, 304 transitions, 4176 flow [2024-06-20 16:44:47,145 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 162 places, 304 transitions, 3907 flow, removed 21 selfloop flow, removed 10 redundant places. [2024-06-20 16:44:47,149 INFO L231 Difference]: Finished difference. Result has 164 places, 220 transitions, 3112 flow [2024-06-20 16:44:47,149 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2743, PETRI_DIFFERENCE_MINUEND_PLACES=151, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=215, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=114, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=98, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=3112, PETRI_PLACES=164, PETRI_TRANSITIONS=220} [2024-06-20 16:44:47,149 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 121 predicate places. [2024-06-20 16:44:47,150 INFO L495 AbstractCegarLoop]: Abstraction has has 164 places, 220 transitions, 3112 flow [2024-06-20 16:44:47,150 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:44:47,150 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:44:47,150 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:44:47,150 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2024-06-20 16:44:47,150 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:44:47,151 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:44:47,151 INFO L85 PathProgramCache]: Analyzing trace with hash -626485433, now seen corresponding path program 4 times [2024-06-20 16:44:47,151 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:44:47,151 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1679593777] [2024-06-20 16:44:47,151 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:44:47,151 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:44:47,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:44:50,574 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:44:50,574 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:44:50,574 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1679593777] [2024-06-20 16:44:50,575 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1679593777] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:44:50,575 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:44:50,575 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 16:44:50,575 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [797349110] [2024-06-20 16:44:50,575 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:44:50,575 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 16:44:50,575 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:44:50,576 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 16:44:50,576 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-20 16:44:50,625 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-20 16:44:50,625 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 164 places, 220 transitions, 3112 flow. Second operand has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:44:50,625 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:44:50,626 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-20 16:44:50,626 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:44:53,430 INFO L124 PetriNetUnfolderBase]: 4764/7518 cut-off events. [2024-06-20 16:44:53,430 INFO L125 PetriNetUnfolderBase]: For 215839/215841 co-relation queries the response was YES. [2024-06-20 16:44:53,467 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46429 conditions, 7518 events. 4764/7518 cut-off events. For 215839/215841 co-relation queries the response was YES. Maximal size of possible extension queue 354. Compared 46577 event pairs, 1801 based on Foata normal form. 76/7593 useless extension candidates. Maximal degree in co-relation 46350. Up to 6292 conditions per place. [2024-06-20 16:44:53,490 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 212 selfloop transitions, 85 changer transitions 0/301 dead transitions. [2024-06-20 16:44:53,491 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 176 places, 301 transitions, 4152 flow [2024-06-20 16:44:53,492 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-06-20 16:44:53,492 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-06-20 16:44:53,492 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 246 transitions. [2024-06-20 16:44:53,492 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45054945054945056 [2024-06-20 16:44:53,493 INFO L175 Difference]: Start difference. First operand has 164 places, 220 transitions, 3112 flow. Second operand 13 states and 246 transitions. [2024-06-20 16:44:53,493 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 176 places, 301 transitions, 4152 flow [2024-06-20 16:44:53,783 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 168 places, 301 transitions, 3941 flow, removed 29 selfloop flow, removed 8 redundant places. [2024-06-20 16:44:53,787 INFO L231 Difference]: Finished difference. Result has 169 places, 222 transitions, 3150 flow [2024-06-20 16:44:53,787 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2903, PETRI_DIFFERENCE_MINUEND_PLACES=156, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=220, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=83, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=135, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=3150, PETRI_PLACES=169, PETRI_TRANSITIONS=222} [2024-06-20 16:44:53,788 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 126 predicate places. [2024-06-20 16:44:53,788 INFO L495 AbstractCegarLoop]: Abstraction has has 169 places, 222 transitions, 3150 flow [2024-06-20 16:44:53,788 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:44:53,788 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:44:53,788 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:44:53,788 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2024-06-20 16:44:53,788 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:44:53,789 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:44:53,789 INFO L85 PathProgramCache]: Analyzing trace with hash -203588947, now seen corresponding path program 5 times [2024-06-20 16:44:53,789 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:44:53,789 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1554382417] [2024-06-20 16:44:53,789 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:44:53,789 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:44:53,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:44:57,340 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:44:57,340 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:44:57,340 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1554382417] [2024-06-20 16:44:57,340 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1554382417] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:44:57,341 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:44:57,341 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 16:44:57,341 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1440657114] [2024-06-20 16:44:57,341 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:44:57,341 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 16:44:57,341 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:44:57,342 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 16:44:57,355 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-20 16:44:57,367 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-20 16:44:57,367 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 169 places, 222 transitions, 3150 flow. Second operand has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:44:57,367 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:44:57,367 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-20 16:44:57,367 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:44:59,965 INFO L124 PetriNetUnfolderBase]: 5076/8048 cut-off events. [2024-06-20 16:44:59,965 INFO L125 PetriNetUnfolderBase]: For 229449/229451 co-relation queries the response was YES. [2024-06-20 16:45:00,012 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49079 conditions, 8048 events. 5076/8048 cut-off events. For 229449/229451 co-relation queries the response was YES. Maximal size of possible extension queue 384. Compared 50942 event pairs, 1953 based on Foata normal form. 76/8123 useless extension candidates. Maximal degree in co-relation 48998. Up to 6816 conditions per place. [2024-06-20 16:45:00,038 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 208 selfloop transitions, 81 changer transitions 0/293 dead transitions. [2024-06-20 16:45:00,039 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 179 places, 293 transitions, 4160 flow [2024-06-20 16:45:00,040 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-20 16:45:00,040 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-20 16:45:00,040 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 214 transitions. [2024-06-20 16:45:00,040 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46320346320346323 [2024-06-20 16:45:00,040 INFO L175 Difference]: Start difference. First operand has 169 places, 222 transitions, 3150 flow. Second operand 11 states and 214 transitions. [2024-06-20 16:45:00,041 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 179 places, 293 transitions, 4160 flow [2024-06-20 16:45:00,356 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 168 places, 293 transitions, 3950 flow, removed 25 selfloop flow, removed 11 redundant places. [2024-06-20 16:45:00,359 INFO L231 Difference]: Finished difference. Result has 169 places, 224 transitions, 3183 flow [2024-06-20 16:45:00,359 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2940, PETRI_DIFFERENCE_MINUEND_PLACES=158, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=222, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=79, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=141, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=3183, PETRI_PLACES=169, PETRI_TRANSITIONS=224} [2024-06-20 16:45:00,360 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 126 predicate places. [2024-06-20 16:45:00,360 INFO L495 AbstractCegarLoop]: Abstraction has has 169 places, 224 transitions, 3183 flow [2024-06-20 16:45:00,360 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:45:00,360 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:45:00,360 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:45:00,360 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2024-06-20 16:45:00,361 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:45:00,361 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:45:00,361 INFO L85 PathProgramCache]: Analyzing trace with hash -631995683, now seen corresponding path program 6 times [2024-06-20 16:45:00,361 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:45:00,361 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1442702227] [2024-06-20 16:45:00,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:45:00,361 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:45:00,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:45:04,197 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:45:04,197 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:45:04,197 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1442702227] [2024-06-20 16:45:04,198 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1442702227] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:45:04,198 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:45:04,198 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 16:45:04,198 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1724513844] [2024-06-20 16:45:04,198 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:45:04,198 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 16:45:04,198 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:45:04,199 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 16:45:04,199 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-20 16:45:04,218 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-20 16:45:04,218 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 169 places, 224 transitions, 3183 flow. Second operand has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:45:04,219 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:45:04,219 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-20 16:45:04,219 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:45:06,907 INFO L124 PetriNetUnfolderBase]: 5637/8953 cut-off events. [2024-06-20 16:45:06,907 INFO L125 PetriNetUnfolderBase]: For 264560/264562 co-relation queries the response was YES. [2024-06-20 16:45:06,955 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54386 conditions, 8953 events. 5637/8953 cut-off events. For 264560/264562 co-relation queries the response was YES. Maximal size of possible extension queue 437. Compared 58077 event pairs, 2001 based on Foata normal form. 66/9018 useless extension candidates. Maximal degree in co-relation 54304. Up to 6158 conditions per place. [2024-06-20 16:45:06,982 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 221 selfloop transitions, 81 changer transitions 0/306 dead transitions. [2024-06-20 16:45:06,983 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 179 places, 306 transitions, 4398 flow [2024-06-20 16:45:06,983 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-20 16:45:06,984 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-20 16:45:06,984 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 219 transitions. [2024-06-20 16:45:06,984 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.474025974025974 [2024-06-20 16:45:06,984 INFO L175 Difference]: Start difference. First operand has 169 places, 224 transitions, 3183 flow. Second operand 11 states and 219 transitions. [2024-06-20 16:45:06,984 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 179 places, 306 transitions, 4398 flow [2024-06-20 16:45:07,365 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 170 places, 306 transitions, 4194 flow, removed 26 selfloop flow, removed 9 redundant places. [2024-06-20 16:45:07,368 INFO L231 Difference]: Finished difference. Result has 172 places, 229 transitions, 3313 flow [2024-06-20 16:45:07,369 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2979, PETRI_DIFFERENCE_MINUEND_PLACES=160, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=224, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=77, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=144, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=3313, PETRI_PLACES=172, PETRI_TRANSITIONS=229} [2024-06-20 16:45:07,369 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 129 predicate places. [2024-06-20 16:45:07,369 INFO L495 AbstractCegarLoop]: Abstraction has has 172 places, 229 transitions, 3313 flow [2024-06-20 16:45:07,369 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:45:07,369 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:45:07,370 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:45:07,370 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2024-06-20 16:45:07,370 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:45:07,370 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:45:07,370 INFO L85 PathProgramCache]: Analyzing trace with hash -198011365, now seen corresponding path program 1 times [2024-06-20 16:45:07,370 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:45:07,370 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1558317586] [2024-06-20 16:45:07,371 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:45:07,371 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:45:07,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:45:11,222 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:45:11,222 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:45:11,222 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1558317586] [2024-06-20 16:45:11,222 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1558317586] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:45:11,222 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:45:11,222 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-20 16:45:11,222 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1974529138] [2024-06-20 16:45:11,222 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:45:11,222 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-20 16:45:11,222 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:45:11,223 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-20 16:45:11,223 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-20 16:45:11,234 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-20 16:45:11,234 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 172 places, 229 transitions, 3313 flow. Second operand has 11 states, 11 states have (on average 8.363636363636363) internal successors, (92), 11 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:45:11,235 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:45:11,235 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-20 16:45:11,235 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:45:14,148 INFO L124 PetriNetUnfolderBase]: 5849/9367 cut-off events. [2024-06-20 16:45:14,149 INFO L125 PetriNetUnfolderBase]: For 276860/276862 co-relation queries the response was YES. [2024-06-20 16:45:14,200 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56320 conditions, 9367 events. 5849/9367 cut-off events. For 276860/276862 co-relation queries the response was YES. Maximal size of possible extension queue 463. Compared 62033 event pairs, 2243 based on Foata normal form. 56/9422 useless extension candidates. Maximal degree in co-relation 56236. Up to 7031 conditions per place. [2024-06-20 16:45:14,228 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 219 selfloop transitions, 93 changer transitions 0/316 dead transitions. [2024-06-20 16:45:14,229 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 184 places, 316 transitions, 4444 flow [2024-06-20 16:45:14,231 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-06-20 16:45:14,231 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-06-20 16:45:14,231 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 250 transitions. [2024-06-20 16:45:14,231 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45787545787545786 [2024-06-20 16:45:14,231 INFO L175 Difference]: Start difference. First operand has 172 places, 229 transitions, 3313 flow. Second operand 13 states and 250 transitions. [2024-06-20 16:45:14,232 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 184 places, 316 transitions, 4444 flow [2024-06-20 16:45:14,718 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 177 places, 316 transitions, 4275 flow, removed 37 selfloop flow, removed 7 redundant places. [2024-06-20 16:45:14,721 INFO L231 Difference]: Finished difference. Result has 178 places, 231 transitions, 3408 flow [2024-06-20 16:45:14,722 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3144, PETRI_DIFFERENCE_MINUEND_PLACES=165, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=229, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=91, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=136, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=3408, PETRI_PLACES=178, PETRI_TRANSITIONS=231} [2024-06-20 16:45:14,722 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 135 predicate places. [2024-06-20 16:45:14,722 INFO L495 AbstractCegarLoop]: Abstraction has has 178 places, 231 transitions, 3408 flow [2024-06-20 16:45:14,722 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 8.363636363636363) internal successors, (92), 11 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:45:14,722 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:45:14,722 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:45:14,723 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2024-06-20 16:45:14,723 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:45:14,723 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:45:14,723 INFO L85 PathProgramCache]: Analyzing trace with hash -85606691, now seen corresponding path program 7 times [2024-06-20 16:45:14,723 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:45:14,723 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [489392182] [2024-06-20 16:45:14,723 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:45:14,724 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:45:14,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:45:18,261 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:45:18,261 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:45:18,261 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [489392182] [2024-06-20 16:45:18,262 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [489392182] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:45:18,262 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:45:18,262 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 16:45:18,262 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1546320366] [2024-06-20 16:45:18,262 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:45:18,262 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 16:45:18,262 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:45:18,262 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 16:45:18,262 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-20 16:45:18,276 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-20 16:45:18,277 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 178 places, 231 transitions, 3408 flow. Second operand has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:45:18,277 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:45:18,277 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-20 16:45:18,277 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:45:21,161 INFO L124 PetriNetUnfolderBase]: 6349/10244 cut-off events. [2024-06-20 16:45:21,162 INFO L125 PetriNetUnfolderBase]: For 309865/309867 co-relation queries the response was YES. [2024-06-20 16:45:21,226 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60279 conditions, 10244 events. 6349/10244 cut-off events. For 309865/309867 co-relation queries the response was YES. Maximal size of possible extension queue 534. Compared 69623 event pairs, 2637 based on Foata normal form. 76/10319 useless extension candidates. Maximal degree in co-relation 60193. Up to 8298 conditions per place. [2024-06-20 16:45:21,257 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 194 selfloop transitions, 98 changer transitions 0/296 dead transitions. [2024-06-20 16:45:21,257 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 187 places, 296 transitions, 4361 flow [2024-06-20 16:45:21,258 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 16:45:21,258 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 16:45:21,259 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 199 transitions. [2024-06-20 16:45:21,259 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4738095238095238 [2024-06-20 16:45:21,259 INFO L175 Difference]: Start difference. First operand has 178 places, 231 transitions, 3408 flow. Second operand 10 states and 199 transitions. [2024-06-20 16:45:21,259 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 187 places, 296 transitions, 4361 flow [2024-06-20 16:45:21,689 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 176 places, 296 transitions, 4119 flow, removed 30 selfloop flow, removed 11 redundant places. [2024-06-20 16:45:21,693 INFO L231 Difference]: Finished difference. Result has 177 places, 233 transitions, 3457 flow [2024-06-20 16:45:21,693 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3166, PETRI_DIFFERENCE_MINUEND_PLACES=167, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=231, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=96, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=133, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3457, PETRI_PLACES=177, PETRI_TRANSITIONS=233} [2024-06-20 16:45:21,694 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 134 predicate places. [2024-06-20 16:45:21,694 INFO L495 AbstractCegarLoop]: Abstraction has has 177 places, 233 transitions, 3457 flow [2024-06-20 16:45:21,694 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:45:21,694 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:45:21,694 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:45:21,694 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2024-06-20 16:45:21,694 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:45:21,695 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:45:21,695 INFO L85 PathProgramCache]: Analyzing trace with hash -85754561, now seen corresponding path program 8 times [2024-06-20 16:45:21,695 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:45:21,695 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [91928181] [2024-06-20 16:45:21,695 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:45:21,695 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:45:21,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:45:25,095 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:45:25,095 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:45:25,095 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [91928181] [2024-06-20 16:45:25,095 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [91928181] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:45:25,095 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:45:25,096 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 16:45:25,096 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [309863176] [2024-06-20 16:45:25,096 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:45:25,096 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 16:45:25,097 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:45:25,097 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 16:45:25,098 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-20 16:45:25,139 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-20 16:45:25,139 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 177 places, 233 transitions, 3457 flow. Second operand has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:45:25,139 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:45:25,139 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-20 16:45:25,139 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:45:28,099 INFO L124 PetriNetUnfolderBase]: 7024/11385 cut-off events. [2024-06-20 16:45:28,099 INFO L125 PetriNetUnfolderBase]: For 336027/336029 co-relation queries the response was YES. [2024-06-20 16:45:28,181 INFO L83 FinitePrefix]: Finished finitePrefix Result has 65296 conditions, 11385 events. 7024/11385 cut-off events. For 336027/336029 co-relation queries the response was YES. Maximal size of possible extension queue 632. Compared 79364 event pairs, 2214 based on Foata normal form. 66/11450 useless extension candidates. Maximal degree in co-relation 65209. Up to 6478 conditions per place. [2024-06-20 16:45:28,216 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 204 selfloop transitions, 106 changer transitions 0/314 dead transitions. [2024-06-20 16:45:28,216 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 186 places, 314 transitions, 4759 flow [2024-06-20 16:45:28,219 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 16:45:28,219 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 16:45:28,219 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 206 transitions. [2024-06-20 16:45:28,219 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49047619047619045 [2024-06-20 16:45:28,220 INFO L175 Difference]: Start difference. First operand has 177 places, 233 transitions, 3457 flow. Second operand 10 states and 206 transitions. [2024-06-20 16:45:28,220 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 186 places, 314 transitions, 4759 flow [2024-06-20 16:45:28,882 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 178 places, 314 transitions, 4521 flow, removed 28 selfloop flow, removed 8 redundant places. [2024-06-20 16:45:28,886 INFO L231 Difference]: Finished difference. Result has 180 places, 239 transitions, 3638 flow [2024-06-20 16:45:28,886 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3219, PETRI_DIFFERENCE_MINUEND_PLACES=169, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=233, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=100, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=128, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3638, PETRI_PLACES=180, PETRI_TRANSITIONS=239} [2024-06-20 16:45:28,887 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 137 predicate places. [2024-06-20 16:45:28,887 INFO L495 AbstractCegarLoop]: Abstraction has has 180 places, 239 transitions, 3638 flow [2024-06-20 16:45:28,887 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:45:28,887 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:45:28,887 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:45:28,887 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2024-06-20 16:45:28,887 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:45:28,888 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:45:28,888 INFO L85 PathProgramCache]: Analyzing trace with hash -80244311, now seen corresponding path program 9 times [2024-06-20 16:45:28,888 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:45:28,888 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [715830807] [2024-06-20 16:45:28,888 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:45:28,888 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:45:28,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:45:32,107 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:45:32,107 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:45:32,107 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [715830807] [2024-06-20 16:45:32,107 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [715830807] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:45:32,107 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:45:32,107 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 16:45:32,108 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2121116371] [2024-06-20 16:45:32,108 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:45:32,108 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 16:45:32,108 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:45:32,108 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 16:45:32,109 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-20 16:45:32,127 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-20 16:45:32,127 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 180 places, 239 transitions, 3638 flow. Second operand has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:45:32,127 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:45:32,127 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-20 16:45:32,127 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:45:35,089 INFO L124 PetriNetUnfolderBase]: 7153/11589 cut-off events. [2024-06-20 16:45:35,090 INFO L125 PetriNetUnfolderBase]: For 345289/345291 co-relation queries the response was YES. [2024-06-20 16:45:35,167 INFO L83 FinitePrefix]: Finished finitePrefix Result has 65395 conditions, 11589 events. 7153/11589 cut-off events. For 345289/345291 co-relation queries the response was YES. Maximal size of possible extension queue 660. Compared 81684 event pairs, 3022 based on Foata normal form. 76/11664 useless extension candidates. Maximal degree in co-relation 65306. Up to 9670 conditions per place. [2024-06-20 16:45:35,199 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 193 selfloop transitions, 102 changer transitions 0/299 dead transitions. [2024-06-20 16:45:35,199 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 189 places, 299 transitions, 4536 flow [2024-06-20 16:45:35,200 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 16:45:35,200 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 16:45:35,200 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 192 transitions. [2024-06-20 16:45:35,200 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45714285714285713 [2024-06-20 16:45:35,200 INFO L175 Difference]: Start difference. First operand has 180 places, 239 transitions, 3638 flow. Second operand 10 states and 192 transitions. [2024-06-20 16:45:35,200 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 189 places, 299 transitions, 4536 flow [2024-06-20 16:45:35,768 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 180 places, 299 transitions, 4165 flow, removed 42 selfloop flow, removed 9 redundant places. [2024-06-20 16:45:35,772 INFO L231 Difference]: Finished difference. Result has 181 places, 241 transitions, 3575 flow [2024-06-20 16:45:35,773 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3273, PETRI_DIFFERENCE_MINUEND_PLACES=171, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=239, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=100, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=137, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3575, PETRI_PLACES=181, PETRI_TRANSITIONS=241} [2024-06-20 16:45:35,774 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 138 predicate places. [2024-06-20 16:45:35,774 INFO L495 AbstractCegarLoop]: Abstraction has has 181 places, 241 transitions, 3575 flow [2024-06-20 16:45:35,774 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:45:35,774 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:45:35,774 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:45:35,775 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2024-06-20 16:45:35,775 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:45:35,775 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:45:35,775 INFO L85 PathProgramCache]: Analyzing trace with hash -1605243253, now seen corresponding path program 10 times [2024-06-20 16:45:35,775 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:45:35,775 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1534065243] [2024-06-20 16:45:35,775 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:45:35,776 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:45:35,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:45:38,848 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:45:38,848 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:45:38,848 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1534065243] [2024-06-20 16:45:38,848 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1534065243] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:45:38,848 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:45:38,848 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 16:45:38,849 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1317698877] [2024-06-20 16:45:38,849 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:45:38,850 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 16:45:38,850 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:45:38,850 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 16:45:38,850 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-20 16:45:38,858 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-20 16:45:38,858 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 181 places, 241 transitions, 3575 flow. Second operand has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:45:38,858 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:45:38,858 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-20 16:45:38,858 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:45:41,828 INFO L124 PetriNetUnfolderBase]: 7185/11671 cut-off events. [2024-06-20 16:45:41,829 INFO L125 PetriNetUnfolderBase]: For 317724/317747 co-relation queries the response was YES. [2024-06-20 16:45:41,883 INFO L83 FinitePrefix]: Finished finitePrefix Result has 64473 conditions, 11671 events. 7185/11671 cut-off events. For 317724/317747 co-relation queries the response was YES. Maximal size of possible extension queue 662. Compared 82524 event pairs, 3383 based on Foata normal form. 43/11713 useless extension candidates. Maximal degree in co-relation 64384. Up to 10997 conditions per place. [2024-06-20 16:45:41,910 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 246 selfloop transitions, 46 changer transitions 0/296 dead transitions. [2024-06-20 16:45:41,910 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 190 places, 296 transitions, 4339 flow [2024-06-20 16:45:41,911 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 16:45:41,911 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 16:45:41,911 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 175 transitions. [2024-06-20 16:45:41,912 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4166666666666667 [2024-06-20 16:45:41,912 INFO L175 Difference]: Start difference. First operand has 181 places, 241 transitions, 3575 flow. Second operand 10 states and 175 transitions. [2024-06-20 16:45:41,912 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 190 places, 296 transitions, 4339 flow [2024-06-20 16:45:42,548 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 182 places, 296 transitions, 4089 flow, removed 30 selfloop flow, removed 8 redundant places. [2024-06-20 16:45:42,552 INFO L231 Difference]: Finished difference. Result has 183 places, 242 transitions, 3452 flow [2024-06-20 16:45:42,552 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3325, PETRI_DIFFERENCE_MINUEND_PLACES=173, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=241, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=45, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=195, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3452, PETRI_PLACES=183, PETRI_TRANSITIONS=242} [2024-06-20 16:45:42,553 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 140 predicate places. [2024-06-20 16:45:42,553 INFO L495 AbstractCegarLoop]: Abstraction has has 183 places, 242 transitions, 3452 flow [2024-06-20 16:45:42,553 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:45:42,553 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:45:42,553 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:45:42,553 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2024-06-20 16:45:42,553 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:45:42,554 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:45:42,554 INFO L85 PathProgramCache]: Analyzing trace with hash -80029109, now seen corresponding path program 2 times [2024-06-20 16:45:42,554 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:45:42,554 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1975168140] [2024-06-20 16:45:42,554 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:45:42,554 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:45:42,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:45:45,974 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:45:45,974 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:45:45,975 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1975168140] [2024-06-20 16:45:45,975 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1975168140] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:45:45,975 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:45:45,975 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-20 16:45:45,975 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [802898059] [2024-06-20 16:45:45,975 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:45:45,975 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-20 16:45:45,975 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:45:45,976 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-20 16:45:45,976 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-20 16:45:45,992 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-20 16:45:45,992 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 183 places, 242 transitions, 3452 flow. Second operand has 11 states, 11 states have (on average 8.363636363636363) internal successors, (92), 11 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:45:45,992 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:45:45,992 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-20 16:45:45,992 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:45:49,145 INFO L124 PetriNetUnfolderBase]: 7601/12465 cut-off events. [2024-06-20 16:45:49,146 INFO L125 PetriNetUnfolderBase]: For 351501/351503 co-relation queries the response was YES. [2024-06-20 16:45:49,227 INFO L83 FinitePrefix]: Finished finitePrefix Result has 66960 conditions, 12465 events. 7601/12465 cut-off events. For 351501/351503 co-relation queries the response was YES. Maximal size of possible extension queue 717. Compared 90159 event pairs, 2936 based on Foata normal form. 56/12520 useless extension candidates. Maximal degree in co-relation 66870. Up to 8390 conditions per place. [2024-06-20 16:45:49,259 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 191 selfloop transitions, 114 changer transitions 0/309 dead transitions. [2024-06-20 16:45:49,259 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 192 places, 309 transitions, 4422 flow [2024-06-20 16:45:49,260 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 16:45:49,260 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 16:45:49,260 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 196 transitions. [2024-06-20 16:45:49,260 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4666666666666667 [2024-06-20 16:45:49,260 INFO L175 Difference]: Start difference. First operand has 183 places, 242 transitions, 3452 flow. Second operand 10 states and 196 transitions. [2024-06-20 16:45:49,261 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 192 places, 309 transitions, 4422 flow [2024-06-20 16:45:49,912 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 184 places, 309 transitions, 4309 flow, removed 12 selfloop flow, removed 8 redundant places. [2024-06-20 16:45:49,916 INFO L231 Difference]: Finished difference. Result has 186 places, 245 transitions, 3719 flow [2024-06-20 16:45:49,916 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3339, PETRI_DIFFERENCE_MINUEND_PLACES=175, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=242, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=111, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=128, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3719, PETRI_PLACES=186, PETRI_TRANSITIONS=245} [2024-06-20 16:45:49,917 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 143 predicate places. [2024-06-20 16:45:49,917 INFO L495 AbstractCegarLoop]: Abstraction has has 186 places, 245 transitions, 3719 flow [2024-06-20 16:45:49,917 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 8.363636363636363) internal successors, (92), 11 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:45:49,917 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:45:49,917 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:45:49,917 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2024-06-20 16:45:49,918 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:45:49,918 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:45:49,918 INFO L85 PathProgramCache]: Analyzing trace with hash -1348527541, now seen corresponding path program 3 times [2024-06-20 16:45:49,918 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:45:49,918 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [964099011] [2024-06-20 16:45:49,918 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:45:49,919 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:45:49,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:45:53,117 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:45:53,117 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:45:53,117 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [964099011] [2024-06-20 16:45:53,117 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [964099011] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:45:53,117 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:45:53,117 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 16:45:53,118 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1706334436] [2024-06-20 16:45:53,118 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:45:53,118 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 16:45:53,118 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:45:53,118 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 16:45:53,118 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-20 16:45:53,128 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-20 16:45:53,129 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 186 places, 245 transitions, 3719 flow. Second operand has 10 states, 10 states have (on average 8.5) internal successors, (85), 10 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:45:53,129 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:45:53,129 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-20 16:45:53,129 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:45:56,265 INFO L124 PetriNetUnfolderBase]: 7649/12571 cut-off events. [2024-06-20 16:45:56,266 INFO L125 PetriNetUnfolderBase]: For 346866/346889 co-relation queries the response was YES. [2024-06-20 16:45:56,333 INFO L83 FinitePrefix]: Finished finitePrefix Result has 68600 conditions, 12571 events. 7649/12571 cut-off events. For 346866/346889 co-relation queries the response was YES. Maximal size of possible extension queue 726. Compared 91484 event pairs, 3677 based on Foata normal form. 35/12605 useless extension candidates. Maximal degree in co-relation 68508. Up to 11691 conditions per place. [2024-06-20 16:45:56,364 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 255 selfloop transitions, 49 changer transitions 0/308 dead transitions. [2024-06-20 16:45:56,364 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 196 places, 308 transitions, 4537 flow [2024-06-20 16:45:56,365 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-20 16:45:56,365 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-20 16:45:56,365 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 192 transitions. [2024-06-20 16:45:56,366 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4155844155844156 [2024-06-20 16:45:56,366 INFO L175 Difference]: Start difference. First operand has 186 places, 245 transitions, 3719 flow. Second operand 11 states and 192 transitions. [2024-06-20 16:45:56,366 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 196 places, 308 transitions, 4537 flow [2024-06-20 16:45:57,050 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 189 places, 308 transitions, 4293 flow, removed 33 selfloop flow, removed 7 redundant places. [2024-06-20 16:45:57,054 INFO L231 Difference]: Finished difference. Result has 190 places, 246 transitions, 3611 flow [2024-06-20 16:45:57,054 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3475, PETRI_DIFFERENCE_MINUEND_PLACES=179, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=245, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=48, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=196, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=3611, PETRI_PLACES=190, PETRI_TRANSITIONS=246} [2024-06-20 16:45:57,055 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 147 predicate places. [2024-06-20 16:45:57,055 INFO L495 AbstractCegarLoop]: Abstraction has has 190 places, 246 transitions, 3611 flow [2024-06-20 16:45:57,055 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.5) internal successors, (85), 10 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:45:57,055 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:45:57,055 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:45:57,056 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2024-06-20 16:45:57,056 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:45:57,056 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:45:57,056 INFO L85 PathProgramCache]: Analyzing trace with hash -1339330771, now seen corresponding path program 4 times [2024-06-20 16:45:57,056 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:45:57,056 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [877484788] [2024-06-20 16:45:57,056 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:45:57,057 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:45:57,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:46:00,586 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:46:00,586 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:46:00,586 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [877484788] [2024-06-20 16:46:00,586 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [877484788] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:46:00,586 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:46:00,586 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 16:46:00,586 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [323716751] [2024-06-20 16:46:00,587 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:46:00,587 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 16:46:00,587 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:46:00,587 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 16:46:00,587 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-20 16:46:00,600 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-20 16:46:00,600 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 190 places, 246 transitions, 3611 flow. Second operand has 10 states, 10 states have (on average 8.5) internal successors, (85), 10 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:46:00,600 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:46:00,600 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-20 16:46:00,600 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:46:03,679 INFO L124 PetriNetUnfolderBase]: 7629/12533 cut-off events. [2024-06-20 16:46:03,679 INFO L125 PetriNetUnfolderBase]: For 348359/348382 co-relation queries the response was YES. [2024-06-20 16:46:03,802 INFO L83 FinitePrefix]: Finished finitePrefix Result has 67817 conditions, 12533 events. 7629/12533 cut-off events. For 348359/348382 co-relation queries the response was YES. Maximal size of possible extension queue 725. Compared 90817 event pairs, 3619 based on Foata normal form. 35/12567 useless extension candidates. Maximal degree in co-relation 67724. Up to 10729 conditions per place. [2024-06-20 16:46:03,839 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 237 selfloop transitions, 60 changer transitions 0/301 dead transitions. [2024-06-20 16:46:03,839 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 198 places, 301 transitions, 4297 flow [2024-06-20 16:46:03,840 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 16:46:03,840 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 16:46:03,841 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 175 transitions. [2024-06-20 16:46:03,841 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4166666666666667 [2024-06-20 16:46:03,841 INFO L175 Difference]: Start difference. First operand has 190 places, 246 transitions, 3611 flow. Second operand 10 states and 175 transitions. [2024-06-20 16:46:03,841 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 198 places, 301 transitions, 4297 flow [2024-06-20 16:46:04,649 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 190 places, 301 transitions, 4189 flow, removed 14 selfloop flow, removed 8 redundant places. [2024-06-20 16:46:04,653 INFO L231 Difference]: Finished difference. Result has 191 places, 245 transitions, 3553 flow [2024-06-20 16:46:04,653 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3429, PETRI_DIFFERENCE_MINUEND_PLACES=181, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=245, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=60, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=185, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3553, PETRI_PLACES=191, PETRI_TRANSITIONS=245} [2024-06-20 16:46:04,654 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 148 predicate places. [2024-06-20 16:46:04,654 INFO L495 AbstractCegarLoop]: Abstraction has has 191 places, 245 transitions, 3553 flow [2024-06-20 16:46:04,654 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.5) internal successors, (85), 10 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:46:04,655 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:46:04,655 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:46:04,655 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2024-06-20 16:46:04,655 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:46:04,655 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:46:04,655 INFO L85 PathProgramCache]: Analyzing trace with hash 2078157663, now seen corresponding path program 1 times [2024-06-20 16:46:04,655 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:46:04,656 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [270142189] [2024-06-20 16:46:04,656 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:46:04,656 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:46:04,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:46:07,433 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:46:07,433 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:46:07,433 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [270142189] [2024-06-20 16:46:07,433 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [270142189] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:46:07,433 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:46:07,433 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 16:46:07,434 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [969708055] [2024-06-20 16:46:07,434 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:46:07,434 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 16:46:07,434 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:46:07,434 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 16:46:07,435 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-20 16:46:07,463 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-20 16:46:07,463 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 191 places, 245 transitions, 3553 flow. Second operand has 8 states, 8 states have (on average 10.0) internal successors, (80), 8 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:46:07,463 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:46:07,463 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-20 16:46:07,463 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:46:10,196 INFO L124 PetriNetUnfolderBase]: 7733/12691 cut-off events. [2024-06-20 16:46:10,196 INFO L125 PetriNetUnfolderBase]: For 372144/372199 co-relation queries the response was YES. [2024-06-20 16:46:10,263 INFO L83 FinitePrefix]: Finished finitePrefix Result has 70077 conditions, 12691 events. 7733/12691 cut-off events. For 372144/372199 co-relation queries the response was YES. Maximal size of possible extension queue 727. Compared 92484 event pairs, 3746 based on Foata normal form. 51/12705 useless extension candidates. Maximal degree in co-relation 69983. Up to 12151 conditions per place. [2024-06-20 16:46:10,292 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 237 selfloop transitions, 53 changer transitions 9/313 dead transitions. [2024-06-20 16:46:10,292 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 199 places, 313 transitions, 4840 flow [2024-06-20 16:46:10,293 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 16:46:10,293 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 16:46:10,293 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 153 transitions. [2024-06-20 16:46:10,293 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40476190476190477 [2024-06-20 16:46:10,294 INFO L175 Difference]: Start difference. First operand has 191 places, 245 transitions, 3553 flow. Second operand 9 states and 153 transitions. [2024-06-20 16:46:10,294 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 199 places, 313 transitions, 4840 flow [2024-06-20 16:46:11,097 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 191 places, 313 transitions, 4658 flow, removed 15 selfloop flow, removed 8 redundant places. [2024-06-20 16:46:11,101 INFO L231 Difference]: Finished difference. Result has 195 places, 275 transitions, 4054 flow [2024-06-20 16:46:11,101 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3394, PETRI_DIFFERENCE_MINUEND_PLACES=183, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=245, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=205, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4054, PETRI_PLACES=195, PETRI_TRANSITIONS=275} [2024-06-20 16:46:11,102 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 152 predicate places. [2024-06-20 16:46:11,102 INFO L495 AbstractCegarLoop]: Abstraction has has 195 places, 275 transitions, 4054 flow [2024-06-20 16:46:11,102 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.0) internal successors, (80), 8 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:46:11,102 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:46:11,102 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:46:11,102 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2024-06-20 16:46:11,102 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:46:11,103 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:46:11,103 INFO L85 PathProgramCache]: Analyzing trace with hash 676921921, now seen corresponding path program 2 times [2024-06-20 16:46:11,103 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:46:11,103 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1954254272] [2024-06-20 16:46:11,103 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:46:11,103 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:46:11,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:46:14,455 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:46:14,456 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:46:14,456 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1954254272] [2024-06-20 16:46:14,456 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1954254272] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:46:14,456 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:46:14,456 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 16:46:14,456 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [156521610] [2024-06-20 16:46:14,456 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:46:14,458 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 16:46:14,458 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:46:14,459 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 16:46:14,459 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-20 16:46:14,487 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-20 16:46:14,487 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 195 places, 275 transitions, 4054 flow. Second operand has 8 states, 8 states have (on average 10.0) internal successors, (80), 8 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:46:14,487 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:46:14,487 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-20 16:46:14,488 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:46:17,283 INFO L124 PetriNetUnfolderBase]: 7834/12814 cut-off events. [2024-06-20 16:46:17,283 INFO L125 PetriNetUnfolderBase]: For 389762/389823 co-relation queries the response was YES. [2024-06-20 16:46:17,372 INFO L83 FinitePrefix]: Finished finitePrefix Result has 71555 conditions, 12814 events. 7834/12814 cut-off events. For 389762/389823 co-relation queries the response was YES. Maximal size of possible extension queue 725. Compared 92776 event pairs, 3704 based on Foata normal form. 51/12826 useless extension candidates. Maximal degree in co-relation 71458. Up to 12225 conditions per place. [2024-06-20 16:46:17,406 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 232 selfloop transitions, 74 changer transitions 9/329 dead transitions. [2024-06-20 16:46:17,406 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 202 places, 329 transitions, 5311 flow [2024-06-20 16:46:17,407 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 16:46:17,407 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 16:46:17,408 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 135 transitions. [2024-06-20 16:46:17,408 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4017857142857143 [2024-06-20 16:46:17,408 INFO L175 Difference]: Start difference. First operand has 195 places, 275 transitions, 4054 flow. Second operand 8 states and 135 transitions. [2024-06-20 16:46:17,408 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 202 places, 329 transitions, 5311 flow [2024-06-20 16:46:18,188 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 199 places, 329 transitions, 5212 flow, removed 21 selfloop flow, removed 3 redundant places. [2024-06-20 16:46:18,193 INFO L231 Difference]: Finished difference. Result has 201 places, 297 transitions, 4606 flow [2024-06-20 16:46:18,193 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3969, PETRI_DIFFERENCE_MINUEND_PLACES=192, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=275, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=52, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=209, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4606, PETRI_PLACES=201, PETRI_TRANSITIONS=297} [2024-06-20 16:46:18,193 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 158 predicate places. [2024-06-20 16:46:18,194 INFO L495 AbstractCegarLoop]: Abstraction has has 201 places, 297 transitions, 4606 flow [2024-06-20 16:46:18,194 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.0) internal successors, (80), 8 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:46:18,194 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:46:18,194 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:46:18,194 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2024-06-20 16:46:18,194 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:46:18,195 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:46:18,195 INFO L85 PathProgramCache]: Analyzing trace with hash 1886491615, now seen corresponding path program 3 times [2024-06-20 16:46:18,195 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:46:18,195 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1345393025] [2024-06-20 16:46:18,195 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:46:18,195 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:46:18,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:46:21,433 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:46:21,434 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:46:21,434 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1345393025] [2024-06-20 16:46:21,434 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1345393025] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:46:21,434 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:46:21,434 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 16:46:21,434 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [414489291] [2024-06-20 16:46:21,434 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:46:21,434 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 16:46:21,434 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:46:21,435 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 16:46:21,435 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-20 16:46:21,486 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-20 16:46:21,486 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 201 places, 297 transitions, 4606 flow. Second operand has 8 states, 8 states have (on average 10.0) internal successors, (80), 8 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:46:21,486 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:46:21,486 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-20 16:46:21,486 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:46:24,222 INFO L124 PetriNetUnfolderBase]: 7366/11942 cut-off events. [2024-06-20 16:46:24,222 INFO L125 PetriNetUnfolderBase]: For 390011/390072 co-relation queries the response was YES. [2024-06-20 16:46:24,312 INFO L83 FinitePrefix]: Finished finitePrefix Result has 67457 conditions, 11942 events. 7366/11942 cut-off events. For 390011/390072 co-relation queries the response was YES. Maximal size of possible extension queue 657. Compared 84548 event pairs, 3383 based on Foata normal form. 51/11957 useless extension candidates. Maximal degree in co-relation 67358. Up to 11303 conditions per place. [2024-06-20 16:46:24,346 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 203 selfloop transitions, 92 changer transitions 15/324 dead transitions. [2024-06-20 16:46:24,346 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 207 places, 324 transitions, 5298 flow [2024-06-20 16:46:24,347 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 16:46:24,347 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 16:46:24,348 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 128 transitions. [2024-06-20 16:46:24,348 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43537414965986393 [2024-06-20 16:46:24,348 INFO L175 Difference]: Start difference. First operand has 201 places, 297 transitions, 4606 flow. Second operand 7 states and 128 transitions. [2024-06-20 16:46:24,348 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 207 places, 324 transitions, 5298 flow [2024-06-20 16:46:25,175 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 203 places, 324 transitions, 5127 flow, removed 50 selfloop flow, removed 4 redundant places. [2024-06-20 16:46:25,179 INFO L231 Difference]: Finished difference. Result has 204 places, 283 transitions, 4416 flow [2024-06-20 16:46:25,179 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4435, PETRI_DIFFERENCE_MINUEND_PLACES=197, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=297, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=92, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=205, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4416, PETRI_PLACES=204, PETRI_TRANSITIONS=283} [2024-06-20 16:46:25,180 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 161 predicate places. [2024-06-20 16:46:25,180 INFO L495 AbstractCegarLoop]: Abstraction has has 204 places, 283 transitions, 4416 flow [2024-06-20 16:46:25,180 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.0) internal successors, (80), 8 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:46:25,180 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:46:25,180 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:46:25,180 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2024-06-20 16:46:25,180 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:46:25,181 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:46:25,181 INFO L85 PathProgramCache]: Analyzing trace with hash 1886907325, now seen corresponding path program 4 times [2024-06-20 16:46:25,181 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:46:25,181 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1672673989] [2024-06-20 16:46:25,181 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:46:25,181 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:46:25,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:46:28,078 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:46:28,079 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:46:28,079 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1672673989] [2024-06-20 16:46:28,079 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1672673989] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:46:28,079 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:46:28,079 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 16:46:28,079 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [552960806] [2024-06-20 16:46:28,079 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:46:28,079 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 16:46:28,079 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:46:28,080 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 16:46:28,080 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-20 16:46:28,107 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-20 16:46:28,108 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 204 places, 283 transitions, 4416 flow. Second operand has 8 states, 8 states have (on average 10.0) internal successors, (80), 8 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:46:28,108 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:46:28,108 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-20 16:46:28,108 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:46:30,565 INFO L124 PetriNetUnfolderBase]: 6450/10423 cut-off events. [2024-06-20 16:46:30,566 INFO L125 PetriNetUnfolderBase]: For 379610/379682 co-relation queries the response was YES. [2024-06-20 16:46:30,641 INFO L83 FinitePrefix]: Finished finitePrefix Result has 62076 conditions, 10423 events. 6450/10423 cut-off events. For 379610/379682 co-relation queries the response was YES. Maximal size of possible extension queue 521. Compared 71337 event pairs, 2552 based on Foata normal form. 59/10444 useless extension candidates. Maximal degree in co-relation 61977. Up to 9643 conditions per place. [2024-06-20 16:46:30,673 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 193 selfloop transitions, 111 changer transitions 0/318 dead transitions. [2024-06-20 16:46:30,674 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 210 places, 318 transitions, 5432 flow [2024-06-20 16:46:30,675 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 16:46:30,675 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 16:46:30,675 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 127 transitions. [2024-06-20 16:46:30,675 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43197278911564624 [2024-06-20 16:46:30,675 INFO L175 Difference]: Start difference. First operand has 204 places, 283 transitions, 4416 flow. Second operand 7 states and 127 transitions. [2024-06-20 16:46:30,676 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 210 places, 318 transitions, 5432 flow [2024-06-20 16:46:31,309 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 200 places, 318 transitions, 5063 flow, removed 12 selfloop flow, removed 10 redundant places. [2024-06-20 16:46:31,314 INFO L231 Difference]: Finished difference. Result has 202 places, 294 transitions, 4532 flow [2024-06-20 16:46:31,314 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4057, PETRI_DIFFERENCE_MINUEND_PLACES=194, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=283, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=103, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=178, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4532, PETRI_PLACES=202, PETRI_TRANSITIONS=294} [2024-06-20 16:46:31,314 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 159 predicate places. [2024-06-20 16:46:31,314 INFO L495 AbstractCegarLoop]: Abstraction has has 202 places, 294 transitions, 4532 flow [2024-06-20 16:46:31,315 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.0) internal successors, (80), 8 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:46:31,315 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:46:31,315 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:46:31,315 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2024-06-20 16:46:31,315 INFO L420 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:46:31,315 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:46:31,315 INFO L85 PathProgramCache]: Analyzing trace with hash -1687619645, now seen corresponding path program 1 times [2024-06-20 16:46:31,316 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:46:31,316 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [584431442] [2024-06-20 16:46:31,316 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:46:31,316 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:46:31,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:46:33,492 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:46:33,492 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:46:33,493 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [584431442] [2024-06-20 16:46:33,493 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [584431442] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:46:33,493 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:46:33,493 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 16:46:33,493 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1301318321] [2024-06-20 16:46:33,493 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:46:33,493 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 16:46:33,494 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:46:33,494 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 16:46:33,494 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-20 16:46:33,505 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-20 16:46:33,506 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 202 places, 294 transitions, 4532 flow. Second operand has 8 states, 8 states have (on average 9.0) internal successors, (72), 8 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:46:33,506 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:46:33,506 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-20 16:46:33,506 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:46:36,122 INFO L124 PetriNetUnfolderBase]: 6558/10552 cut-off events. [2024-06-20 16:46:36,122 INFO L125 PetriNetUnfolderBase]: For 359886/359888 co-relation queries the response was YES. [2024-06-20 16:46:36,191 INFO L83 FinitePrefix]: Finished finitePrefix Result has 63169 conditions, 10552 events. 6558/10552 cut-off events. For 359886/359888 co-relation queries the response was YES. Maximal size of possible extension queue 519. Compared 71821 event pairs, 2877 based on Foata normal form. 4/10555 useless extension candidates. Maximal degree in co-relation 63070. Up to 10241 conditions per place. [2024-06-20 16:46:36,222 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 294 selfloop transitions, 25 changer transitions 0/323 dead transitions. [2024-06-20 16:46:36,223 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 207 places, 323 transitions, 5508 flow [2024-06-20 16:46:36,223 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-20 16:46:36,223 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-20 16:46:36,224 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 107 transitions. [2024-06-20 16:46:36,224 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4246031746031746 [2024-06-20 16:46:36,224 INFO L175 Difference]: Start difference. First operand has 202 places, 294 transitions, 4532 flow. Second operand 6 states and 107 transitions. [2024-06-20 16:46:36,224 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 207 places, 323 transitions, 5508 flow [2024-06-20 16:46:36,779 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 205 places, 323 transitions, 5391 flow, removed 38 selfloop flow, removed 2 redundant places. [2024-06-20 16:46:36,783 INFO L231 Difference]: Finished difference. Result has 207 places, 300 transitions, 4609 flow [2024-06-20 16:46:36,783 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4423, PETRI_DIFFERENCE_MINUEND_PLACES=200, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=294, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=271, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=4609, PETRI_PLACES=207, PETRI_TRANSITIONS=300} [2024-06-20 16:46:36,784 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 164 predicate places. [2024-06-20 16:46:36,784 INFO L495 AbstractCegarLoop]: Abstraction has has 207 places, 300 transitions, 4609 flow [2024-06-20 16:46:36,784 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.0) internal successors, (72), 8 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:46:36,784 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:46:36,784 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:46:36,784 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2024-06-20 16:46:36,784 INFO L420 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:46:36,785 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:46:36,785 INFO L85 PathProgramCache]: Analyzing trace with hash -1659794045, now seen corresponding path program 2 times [2024-06-20 16:46:36,785 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:46:36,785 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [325130945] [2024-06-20 16:46:36,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:46:36,785 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:46:36,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:46:39,278 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:46:39,278 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:46:39,278 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [325130945] [2024-06-20 16:46:39,278 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [325130945] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:46:39,278 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:46:39,278 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 16:46:39,279 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [91772498] [2024-06-20 16:46:39,279 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:46:39,279 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 16:46:39,279 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:46:39,279 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 16:46:39,279 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-20 16:46:39,300 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-20 16:46:39,300 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 207 places, 300 transitions, 4609 flow. Second operand has 8 states, 8 states have (on average 9.0) internal successors, (72), 8 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:46:39,300 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:46:39,300 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-20 16:46:39,300 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:46:41,819 INFO L124 PetriNetUnfolderBase]: 6524/10504 cut-off events. [2024-06-20 16:46:41,819 INFO L125 PetriNetUnfolderBase]: For 371079/371081 co-relation queries the response was YES. [2024-06-20 16:46:41,883 INFO L83 FinitePrefix]: Finished finitePrefix Result has 63051 conditions, 10504 events. 6524/10504 cut-off events. For 371079/371081 co-relation queries the response was YES. Maximal size of possible extension queue 519. Compared 71574 event pairs, 2868 based on Foata normal form. 8/10511 useless extension candidates. Maximal degree in co-relation 62949. Up to 10242 conditions per place. [2024-06-20 16:46:41,913 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 295 selfloop transitions, 21 changer transitions 0/320 dead transitions. [2024-06-20 16:46:41,913 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 212 places, 320 transitions, 5303 flow [2024-06-20 16:46:41,914 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-20 16:46:41,914 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-20 16:46:41,915 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 104 transitions. [2024-06-20 16:46:41,915 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4126984126984127 [2024-06-20 16:46:41,915 INFO L175 Difference]: Start difference. First operand has 207 places, 300 transitions, 4609 flow. Second operand 6 states and 104 transitions. [2024-06-20 16:46:41,915 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 212 places, 320 transitions, 5303 flow [2024-06-20 16:46:42,491 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 210 places, 320 transitions, 5195 flow, removed 48 selfloop flow, removed 2 redundant places. [2024-06-20 16:46:42,496 INFO L231 Difference]: Finished difference. Result has 211 places, 300 transitions, 4555 flow [2024-06-20 16:46:42,496 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4501, PETRI_DIFFERENCE_MINUEND_PLACES=205, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=300, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=279, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=4555, PETRI_PLACES=211, PETRI_TRANSITIONS=300} [2024-06-20 16:46:42,496 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 168 predicate places. [2024-06-20 16:46:42,496 INFO L495 AbstractCegarLoop]: Abstraction has has 211 places, 300 transitions, 4555 flow [2024-06-20 16:46:42,497 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.0) internal successors, (72), 8 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:46:42,497 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:46:42,498 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:46:42,498 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2024-06-20 16:46:42,502 INFO L420 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:46:42,502 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:46:42,502 INFO L85 PathProgramCache]: Analyzing trace with hash 1886922205, now seen corresponding path program 1 times [2024-06-20 16:46:42,502 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:46:42,502 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2039344953] [2024-06-20 16:46:42,502 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:46:42,503 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:46:42,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:46:45,678 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:46:45,678 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:46:45,678 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2039344953] [2024-06-20 16:46:45,678 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2039344953] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:46:45,678 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:46:45,678 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 16:46:45,678 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1921850635] [2024-06-20 16:46:45,678 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:46:45,679 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 16:46:45,679 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:46:45,679 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 16:46:45,679 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-20 16:46:45,715 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-20 16:46:45,716 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 211 places, 300 transitions, 4555 flow. Second operand has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:46:45,716 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:46:45,716 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-20 16:46:45,716 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:46:48,340 INFO L124 PetriNetUnfolderBase]: 6445/10403 cut-off events. [2024-06-20 16:46:48,341 INFO L125 PetriNetUnfolderBase]: For 395920/395981 co-relation queries the response was YES. [2024-06-20 16:46:48,399 INFO L83 FinitePrefix]: Finished finitePrefix Result has 62864 conditions, 10403 events. 6445/10403 cut-off events. For 395920/395981 co-relation queries the response was YES. Maximal size of possible extension queue 522. Compared 70933 event pairs, 2834 based on Foata normal form. 52/10421 useless extension candidates. Maximal degree in co-relation 62759. Up to 10041 conditions per place. [2024-06-20 16:46:48,426 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 291 selfloop transitions, 23 changer transitions 0/328 dead transitions. [2024-06-20 16:46:48,427 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 217 places, 328 transitions, 5311 flow [2024-06-20 16:46:48,427 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 16:46:48,428 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 16:46:48,436 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 124 transitions. [2024-06-20 16:46:48,436 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4217687074829932 [2024-06-20 16:46:48,436 INFO L175 Difference]: Start difference. First operand has 211 places, 300 transitions, 4555 flow. Second operand 7 states and 124 transitions. [2024-06-20 16:46:48,436 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 217 places, 328 transitions, 5311 flow [2024-06-20 16:46:49,179 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 212 places, 328 transitions, 5269 flow, removed 0 selfloop flow, removed 5 redundant places. [2024-06-20 16:46:49,184 INFO L231 Difference]: Finished difference. Result has 213 places, 302 transitions, 4611 flow [2024-06-20 16:46:49,184 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4513, PETRI_DIFFERENCE_MINUEND_PLACES=206, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=300, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=277, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4611, PETRI_PLACES=213, PETRI_TRANSITIONS=302} [2024-06-20 16:46:49,184 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 170 predicate places. [2024-06-20 16:46:49,185 INFO L495 AbstractCegarLoop]: Abstraction has has 213 places, 302 transitions, 4611 flow [2024-06-20 16:46:49,185 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:46:49,185 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:46:49,185 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:46:49,185 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2024-06-20 16:46:49,185 INFO L420 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:46:49,185 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:46:49,186 INFO L85 PathProgramCache]: Analyzing trace with hash -499520628, now seen corresponding path program 1 times [2024-06-20 16:46:49,186 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:46:49,186 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [185849458] [2024-06-20 16:46:49,186 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:46:49,186 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:46:49,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:46:52,866 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:46:52,867 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:46:52,867 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [185849458] [2024-06-20 16:46:52,867 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [185849458] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:46:52,867 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:46:52,867 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 16:46:52,867 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [64679943] [2024-06-20 16:46:52,867 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:46:52,867 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 16:46:52,867 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:46:52,867 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 16:46:52,868 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-20 16:46:52,897 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-20 16:46:52,898 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 213 places, 302 transitions, 4611 flow. Second operand has 9 states, 9 states have (on average 8.88888888888889) internal successors, (80), 9 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:46:52,898 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:46:52,898 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-20 16:46:52,898 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:46:55,768 INFO L124 PetriNetUnfolderBase]: 6573/10579 cut-off events. [2024-06-20 16:46:55,768 INFO L125 PetriNetUnfolderBase]: For 396428/396428 co-relation queries the response was YES. [2024-06-20 16:46:55,847 INFO L83 FinitePrefix]: Finished finitePrefix Result has 64127 conditions, 10579 events. 6573/10579 cut-off events. For 396428/396428 co-relation queries the response was YES. Maximal size of possible extension queue 519. Compared 72201 event pairs, 2920 based on Foata normal form. 2/10580 useless extension candidates. Maximal degree in co-relation 64021. Up to 10331 conditions per place. [2024-06-20 16:46:55,877 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 311 selfloop transitions, 27 changer transitions 0/342 dead transitions. [2024-06-20 16:46:55,878 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 220 places, 342 transitions, 5495 flow [2024-06-20 16:46:55,878 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 16:46:55,879 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 16:46:55,879 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 132 transitions. [2024-06-20 16:46:55,879 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39285714285714285 [2024-06-20 16:46:55,879 INFO L175 Difference]: Start difference. First operand has 213 places, 302 transitions, 4611 flow. Second operand 8 states and 132 transitions. [2024-06-20 16:46:55,879 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 220 places, 342 transitions, 5495 flow [2024-06-20 16:46:56,650 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 215 places, 342 transitions, 5421 flow, removed 16 selfloop flow, removed 5 redundant places. [2024-06-20 16:46:56,655 INFO L231 Difference]: Finished difference. Result has 217 places, 309 transitions, 4712 flow [2024-06-20 16:46:56,655 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4537, PETRI_DIFFERENCE_MINUEND_PLACES=208, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=302, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=278, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4712, PETRI_PLACES=217, PETRI_TRANSITIONS=309} [2024-06-20 16:46:56,655 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 174 predicate places. [2024-06-20 16:46:56,656 INFO L495 AbstractCegarLoop]: Abstraction has has 217 places, 309 transitions, 4712 flow [2024-06-20 16:46:56,656 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.88888888888889) internal successors, (80), 9 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:46:56,656 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:46:56,656 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:46:56,656 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2024-06-20 16:46:56,656 INFO L420 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:46:56,657 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:46:56,657 INFO L85 PathProgramCache]: Analyzing trace with hash -490255038, now seen corresponding path program 2 times [2024-06-20 16:46:56,657 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:46:56,657 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1011069197] [2024-06-20 16:46:56,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:46:56,657 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:46:56,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:47:00,469 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:47:00,470 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:47:00,470 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1011069197] [2024-06-20 16:47:00,470 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1011069197] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:47:00,470 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:47:00,470 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 16:47:00,470 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1705120098] [2024-06-20 16:47:00,470 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:47:00,471 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 16:47:00,471 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:47:00,471 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 16:47:00,471 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-20 16:47:00,500 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-20 16:47:00,500 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 217 places, 309 transitions, 4712 flow. Second operand has 9 states, 9 states have (on average 8.88888888888889) internal successors, (80), 9 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:47:00,500 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:47:00,500 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-20 16:47:00,500 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:47:03,128 INFO L124 PetriNetUnfolderBase]: 6604/10624 cut-off events. [2024-06-20 16:47:03,128 INFO L125 PetriNetUnfolderBase]: For 413689/413689 co-relation queries the response was YES. [2024-06-20 16:47:03,209 INFO L83 FinitePrefix]: Finished finitePrefix Result has 64852 conditions, 10624 events. 6604/10624 cut-off events. For 413689/413689 co-relation queries the response was YES. Maximal size of possible extension queue 519. Compared 72467 event pairs, 2916 based on Foata normal form. 2/10625 useless extension candidates. Maximal degree in co-relation 64744. Up to 10340 conditions per place. [2024-06-20 16:47:03,241 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 309 selfloop transitions, 39 changer transitions 0/352 dead transitions. [2024-06-20 16:47:03,241 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 224 places, 352 transitions, 5847 flow [2024-06-20 16:47:03,242 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 16:47:03,242 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 16:47:03,242 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 128 transitions. [2024-06-20 16:47:03,243 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38095238095238093 [2024-06-20 16:47:03,243 INFO L175 Difference]: Start difference. First operand has 217 places, 309 transitions, 4712 flow. Second operand 8 states and 128 transitions. [2024-06-20 16:47:03,243 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 224 places, 352 transitions, 5847 flow [2024-06-20 16:47:04,271 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 219 places, 352 transitions, 5777 flow, removed 7 selfloop flow, removed 5 redundant places. [2024-06-20 16:47:04,276 INFO L231 Difference]: Finished difference. Result has 222 places, 326 transitions, 5050 flow [2024-06-20 16:47:04,276 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4650, PETRI_DIFFERENCE_MINUEND_PLACES=212, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=309, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=277, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5050, PETRI_PLACES=222, PETRI_TRANSITIONS=326} [2024-06-20 16:47:04,276 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 179 predicate places. [2024-06-20 16:47:04,277 INFO L495 AbstractCegarLoop]: Abstraction has has 222 places, 326 transitions, 5050 flow [2024-06-20 16:47:04,277 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.88888888888889) internal successors, (80), 9 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:47:04,277 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:47:04,277 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:47:04,277 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2024-06-20 16:47:04,277 INFO L420 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:47:04,277 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:47:04,278 INFO L85 PathProgramCache]: Analyzing trace with hash -490266198, now seen corresponding path program 3 times [2024-06-20 16:47:04,278 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:47:04,278 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1078408773] [2024-06-20 16:47:04,278 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:47:04,278 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:47:04,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:47:07,923 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:47:07,923 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:47:07,923 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1078408773] [2024-06-20 16:47:07,923 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1078408773] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:47:07,924 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:47:07,924 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 16:47:07,924 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1907117143] [2024-06-20 16:47:07,924 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:47:07,924 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 16:47:07,924 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:47:07,925 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 16:47:07,925 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-20 16:47:07,937 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-20 16:47:07,937 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 222 places, 326 transitions, 5050 flow. Second operand has 9 states, 9 states have (on average 8.88888888888889) internal successors, (80), 9 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:47:07,937 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:47:07,937 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-20 16:47:07,937 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:47:10,784 INFO L124 PetriNetUnfolderBase]: 6598/10620 cut-off events. [2024-06-20 16:47:10,785 INFO L125 PetriNetUnfolderBase]: For 428571/428571 co-relation queries the response was YES. [2024-06-20 16:47:10,868 INFO L83 FinitePrefix]: Finished finitePrefix Result has 65292 conditions, 10620 events. 6598/10620 cut-off events. For 428571/428571 co-relation queries the response was YES. Maximal size of possible extension queue 519. Compared 72488 event pairs, 2911 based on Foata normal form. 2/10621 useless extension candidates. Maximal degree in co-relation 65181. Up to 10335 conditions per place. [2024-06-20 16:47:10,898 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 309 selfloop transitions, 41 changer transitions 0/354 dead transitions. [2024-06-20 16:47:10,898 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 231 places, 354 transitions, 5831 flow [2024-06-20 16:47:10,900 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 16:47:10,900 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 16:47:10,901 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 150 transitions. [2024-06-20 16:47:10,901 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.35714285714285715 [2024-06-20 16:47:10,901 INFO L175 Difference]: Start difference. First operand has 222 places, 326 transitions, 5050 flow. Second operand 10 states and 150 transitions. [2024-06-20 16:47:10,901 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 231 places, 354 transitions, 5831 flow [2024-06-20 16:47:11,969 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 229 places, 354 transitions, 5802 flow, removed 11 selfloop flow, removed 2 redundant places. [2024-06-20 16:47:11,974 INFO L231 Difference]: Finished difference. Result has 230 places, 326 transitions, 5109 flow [2024-06-20 16:47:11,974 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5021, PETRI_DIFFERENCE_MINUEND_PLACES=220, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=326, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=285, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=5109, PETRI_PLACES=230, PETRI_TRANSITIONS=326} [2024-06-20 16:47:11,974 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 187 predicate places. [2024-06-20 16:47:11,974 INFO L495 AbstractCegarLoop]: Abstraction has has 230 places, 326 transitions, 5109 flow [2024-06-20 16:47:11,975 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.88888888888889) internal successors, (80), 9 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:47:11,975 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:47:11,975 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:47:11,975 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2024-06-20 16:47:11,975 INFO L420 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:47:11,975 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:47:11,975 INFO L85 PathProgramCache]: Analyzing trace with hash 794939002, now seen corresponding path program 4 times [2024-06-20 16:47:11,975 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:47:11,976 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [147138941] [2024-06-20 16:47:11,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:47:11,976 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:47:11,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:47:15,848 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:47:15,849 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:47:15,849 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [147138941] [2024-06-20 16:47:15,849 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [147138941] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:47:15,849 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:47:15,849 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 16:47:15,849 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1854967308] [2024-06-20 16:47:15,849 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:47:15,850 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 16:47:15,850 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:47:15,852 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 16:47:15,852 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-20 16:47:15,861 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-20 16:47:15,862 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 230 places, 326 transitions, 5109 flow. Second operand has 9 states, 9 states have (on average 8.88888888888889) internal successors, (80), 9 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:47:15,862 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:47:15,862 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-20 16:47:15,862 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:47:18,413 INFO L124 PetriNetUnfolderBase]: 6608/10634 cut-off events. [2024-06-20 16:47:18,414 INFO L125 PetriNetUnfolderBase]: For 445802/445802 co-relation queries the response was YES. [2024-06-20 16:47:18,503 INFO L83 FinitePrefix]: Finished finitePrefix Result has 65898 conditions, 10634 events. 6608/10634 cut-off events. For 445802/445802 co-relation queries the response was YES. Maximal size of possible extension queue 519. Compared 72589 event pairs, 2908 based on Foata normal form. 2/10635 useless extension candidates. Maximal degree in co-relation 65785. Up to 10326 conditions per place. [2024-06-20 16:47:18,537 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 309 selfloop transitions, 45 changer transitions 0/358 dead transitions. [2024-06-20 16:47:18,537 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 236 places, 358 transitions, 6113 flow [2024-06-20 16:47:18,538 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 16:47:18,538 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 16:47:18,538 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 116 transitions. [2024-06-20 16:47:18,539 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3945578231292517 [2024-06-20 16:47:18,539 INFO L175 Difference]: Start difference. First operand has 230 places, 326 transitions, 5109 flow. Second operand 7 states and 116 transitions. [2024-06-20 16:47:18,539 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 236 places, 358 transitions, 6113 flow [2024-06-20 16:47:19,590 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 229 places, 358 transitions, 6025 flow, removed 5 selfloop flow, removed 7 redundant places. [2024-06-20 16:47:19,595 INFO L231 Difference]: Finished difference. Result has 231 places, 333 transitions, 5284 flow [2024-06-20 16:47:19,596 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5021, PETRI_DIFFERENCE_MINUEND_PLACES=223, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=326, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=284, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=5284, PETRI_PLACES=231, PETRI_TRANSITIONS=333} [2024-06-20 16:47:19,596 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 188 predicate places. [2024-06-20 16:47:19,596 INFO L495 AbstractCegarLoop]: Abstraction has has 231 places, 333 transitions, 5284 flow [2024-06-20 16:47:19,596 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.88888888888889) internal successors, (80), 9 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:47:19,597 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:47:19,597 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:47:19,597 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2024-06-20 16:47:19,597 INFO L420 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:47:19,597 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:47:19,597 INFO L85 PathProgramCache]: Analyzing trace with hash -1635413178, now seen corresponding path program 5 times [2024-06-20 16:47:19,597 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:47:19,598 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [869751667] [2024-06-20 16:47:19,598 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:47:19,598 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:47:19,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:47:23,247 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:47:23,248 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:47:23,248 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [869751667] [2024-06-20 16:47:23,248 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [869751667] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:47:23,248 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:47:23,248 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 16:47:23,248 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [159845629] [2024-06-20 16:47:23,248 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:47:23,248 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 16:47:23,248 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:47:23,248 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 16:47:23,249 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-20 16:47:23,261 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-20 16:47:23,261 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 231 places, 333 transitions, 5284 flow. Second operand has 9 states, 9 states have (on average 8.88888888888889) internal successors, (80), 9 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:47:23,261 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:47:23,261 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-20 16:47:23,262 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:47:26,025 INFO L124 PetriNetUnfolderBase]: 6602/10622 cut-off events. [2024-06-20 16:47:26,025 INFO L125 PetriNetUnfolderBase]: For 461417/461417 co-relation queries the response was YES. [2024-06-20 16:47:26,116 INFO L83 FinitePrefix]: Finished finitePrefix Result has 66291 conditions, 10622 events. 6602/10622 cut-off events. For 461417/461417 co-relation queries the response was YES. Maximal size of possible extension queue 519. Compared 72406 event pairs, 2863 based on Foata normal form. 2/10622 useless extension candidates. Maximal degree in co-relation 66176. Up to 10296 conditions per place. [2024-06-20 16:47:26,152 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 307 selfloop transitions, 49 changer transitions 0/360 dead transitions. [2024-06-20 16:47:26,152 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 237 places, 360 transitions, 6230 flow [2024-06-20 16:47:26,153 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 16:47:26,153 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 16:47:26,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 110 transitions. [2024-06-20 16:47:26,153 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3741496598639456 [2024-06-20 16:47:26,154 INFO L175 Difference]: Start difference. First operand has 231 places, 333 transitions, 5284 flow. Second operand 7 states and 110 transitions. [2024-06-20 16:47:26,154 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 237 places, 360 transitions, 6230 flow [2024-06-20 16:47:27,092 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 233 places, 360 transitions, 6178 flow, removed 11 selfloop flow, removed 4 redundant places. [2024-06-20 16:47:27,097 INFO L231 Difference]: Finished difference. Result has 236 places, 342 transitions, 5475 flow [2024-06-20 16:47:27,097 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5234, PETRI_DIFFERENCE_MINUEND_PLACES=227, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=333, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=286, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=5475, PETRI_PLACES=236, PETRI_TRANSITIONS=342} [2024-06-20 16:47:27,097 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 193 predicate places. [2024-06-20 16:47:27,098 INFO L495 AbstractCegarLoop]: Abstraction has has 236 places, 342 transitions, 5475 flow [2024-06-20 16:47:27,098 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.88888888888889) internal successors, (80), 9 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:47:27,098 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:47:27,098 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:47:27,098 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2024-06-20 16:47:27,098 INFO L420 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:47:27,099 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:47:27,099 INFO L85 PathProgramCache]: Analyzing trace with hash -1648311348, now seen corresponding path program 6 times [2024-06-20 16:47:27,099 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:47:27,099 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [220287124] [2024-06-20 16:47:27,099 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:47:27,099 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:47:27,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:47:31,161 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:47:31,161 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:47:31,161 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [220287124] [2024-06-20 16:47:31,161 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [220287124] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:47:31,161 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:47:31,162 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 16:47:31,162 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1496192924] [2024-06-20 16:47:31,162 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:47:31,162 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 16:47:31,162 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:47:31,162 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 16:47:31,163 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-20 16:47:31,175 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-20 16:47:31,175 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 236 places, 342 transitions, 5475 flow. Second operand has 9 states, 9 states have (on average 8.88888888888889) internal successors, (80), 9 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:47:31,175 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:47:31,175 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-20 16:47:31,175 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:47:33,991 INFO L124 PetriNetUnfolderBase]: 6596/10618 cut-off events. [2024-06-20 16:47:33,991 INFO L125 PetriNetUnfolderBase]: For 460449/460449 co-relation queries the response was YES. [2024-06-20 16:47:34,072 INFO L83 FinitePrefix]: Finished finitePrefix Result has 67504 conditions, 10618 events. 6596/10618 cut-off events. For 460449/460449 co-relation queries the response was YES. Maximal size of possible extension queue 519. Compared 72519 event pairs, 2910 based on Foata normal form. 2/10619 useless extension candidates. Maximal degree in co-relation 67386. Up to 10313 conditions per place. [2024-06-20 16:47:34,105 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 322 selfloop transitions, 50 changer transitions 0/376 dead transitions. [2024-06-20 16:47:34,105 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 244 places, 376 transitions, 6318 flow [2024-06-20 16:47:34,106 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 16:47:34,106 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 16:47:34,106 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 145 transitions. [2024-06-20 16:47:34,106 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3835978835978836 [2024-06-20 16:47:34,107 INFO L175 Difference]: Start difference. First operand has 236 places, 342 transitions, 5475 flow. Second operand 9 states and 145 transitions. [2024-06-20 16:47:34,107 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 244 places, 376 transitions, 6318 flow [2024-06-20 16:47:34,919 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 241 places, 376 transitions, 6230 flow, removed 24 selfloop flow, removed 3 redundant places. [2024-06-20 16:47:34,923 INFO L231 Difference]: Finished difference. Result has 242 places, 342 transitions, 5501 flow [2024-06-20 16:47:34,924 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5387, PETRI_DIFFERENCE_MINUEND_PLACES=233, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=342, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=50, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=292, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5501, PETRI_PLACES=242, PETRI_TRANSITIONS=342} [2024-06-20 16:47:34,924 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 199 predicate places. [2024-06-20 16:47:34,924 INFO L495 AbstractCegarLoop]: Abstraction has has 242 places, 342 transitions, 5501 flow [2024-06-20 16:47:34,925 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.88888888888889) internal successors, (80), 9 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:47:34,925 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:47:34,925 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:47:34,925 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2024-06-20 16:47:34,925 INFO L420 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:47:34,925 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:47:34,925 INFO L85 PathProgramCache]: Analyzing trace with hash 707850194, now seen corresponding path program 1 times [2024-06-20 16:47:34,925 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:47:34,926 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1477703784] [2024-06-20 16:47:34,926 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:47:34,926 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:47:34,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:47:37,523 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:47:37,523 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:47:37,524 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1477703784] [2024-06-20 16:47:37,524 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1477703784] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:47:37,524 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:47:37,524 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 16:47:37,524 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [880849954] [2024-06-20 16:47:37,524 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:47:37,524 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 16:47:37,525 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:47:37,525 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 16:47:37,525 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-20 16:47:37,542 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-20 16:47:37,543 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 242 places, 342 transitions, 5501 flow. Second operand has 9 states, 9 states have (on average 8.88888888888889) internal successors, (80), 9 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:47:37,543 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:47:37,543 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-20 16:47:37,543 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:47:40,317 INFO L124 PetriNetUnfolderBase]: 6584/10604 cut-off events. [2024-06-20 16:47:40,317 INFO L125 PetriNetUnfolderBase]: For 475379/475381 co-relation queries the response was YES. [2024-06-20 16:47:40,425 INFO L83 FinitePrefix]: Finished finitePrefix Result has 67637 conditions, 10604 events. 6584/10604 cut-off events. For 475379/475381 co-relation queries the response was YES. Maximal size of possible extension queue 519. Compared 72215 event pairs, 2864 based on Foata normal form. 6/10609 useless extension candidates. Maximal degree in co-relation 67518. Up to 10310 conditions per place. [2024-06-20 16:47:40,463 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 334 selfloop transitions, 27 changer transitions 0/365 dead transitions. [2024-06-20 16:47:40,463 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 248 places, 365 transitions, 6281 flow [2024-06-20 16:47:40,464 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 16:47:40,464 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 16:47:40,464 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 118 transitions. [2024-06-20 16:47:40,465 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4013605442176871 [2024-06-20 16:47:40,465 INFO L175 Difference]: Start difference. First operand has 242 places, 342 transitions, 5501 flow. Second operand 7 states and 118 transitions. [2024-06-20 16:47:40,465 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 248 places, 365 transitions, 6281 flow [2024-06-20 16:47:41,736 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 240 places, 365 transitions, 6161 flow, removed 8 selfloop flow, removed 8 redundant places. [2024-06-20 16:47:41,741 INFO L231 Difference]: Finished difference. Result has 241 places, 342 transitions, 5441 flow [2024-06-20 16:47:41,741 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5381, PETRI_DIFFERENCE_MINUEND_PLACES=234, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=342, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=315, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=5441, PETRI_PLACES=241, PETRI_TRANSITIONS=342} [2024-06-20 16:47:41,744 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 198 predicate places. [2024-06-20 16:47:41,744 INFO L495 AbstractCegarLoop]: Abstraction has has 241 places, 342 transitions, 5441 flow [2024-06-20 16:47:41,745 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.88888888888889) internal successors, (80), 9 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:47:41,745 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:47:41,745 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:47:41,745 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2024-06-20 16:47:41,745 INFO L420 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:47:41,746 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:47:41,746 INFO L85 PathProgramCache]: Analyzing trace with hash 1055934350, now seen corresponding path program 1 times [2024-06-20 16:47:41,746 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:47:41,746 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [975984577] [2024-06-20 16:47:41,746 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:47:41,747 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:47:41,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:47:44,658 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:47:44,658 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:47:44,658 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [975984577] [2024-06-20 16:47:44,658 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [975984577] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:47:44,658 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:47:44,659 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 16:47:44,659 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1580562917] [2024-06-20 16:47:44,659 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:47:44,659 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 16:47:44,659 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:47:44,659 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 16:47:44,660 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-20 16:47:44,674 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-20 16:47:44,675 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 241 places, 342 transitions, 5441 flow. Second operand has 9 states, 9 states have (on average 8.88888888888889) internal successors, (80), 9 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:47:44,675 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:47:44,675 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-20 16:47:44,675 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:47:47,551 INFO L124 PetriNetUnfolderBase]: 6674/10705 cut-off events. [2024-06-20 16:47:47,551 INFO L125 PetriNetUnfolderBase]: For 484217/484219 co-relation queries the response was YES. [2024-06-20 16:47:47,646 INFO L83 FinitePrefix]: Finished finitePrefix Result has 68887 conditions, 10705 events. 6674/10705 cut-off events. For 484217/484219 co-relation queries the response was YES. Maximal size of possible extension queue 519. Compared 72806 event pairs, 2887 based on Foata normal form. 4/10708 useless extension candidates. Maximal degree in co-relation 68768. Up to 10108 conditions per place. [2024-06-20 16:47:47,683 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 286 selfloop transitions, 107 changer transitions 0/397 dead transitions. [2024-06-20 16:47:47,683 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 250 places, 397 transitions, 6772 flow [2024-06-20 16:47:47,684 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 16:47:47,684 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 16:47:47,685 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 171 transitions. [2024-06-20 16:47:47,685 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40714285714285714 [2024-06-20 16:47:47,685 INFO L175 Difference]: Start difference. First operand has 241 places, 342 transitions, 5441 flow. Second operand 10 states and 171 transitions. [2024-06-20 16:47:47,685 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 250 places, 397 transitions, 6772 flow [2024-06-20 16:47:48,738 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 244 places, 397 transitions, 6688 flow, removed 8 selfloop flow, removed 6 redundant places. [2024-06-20 16:47:48,743 INFO L231 Difference]: Finished difference. Result has 245 places, 351 transitions, 5751 flow [2024-06-20 16:47:48,743 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5357, PETRI_DIFFERENCE_MINUEND_PLACES=235, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=342, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=101, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=240, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=5751, PETRI_PLACES=245, PETRI_TRANSITIONS=351} [2024-06-20 16:47:48,743 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 202 predicate places. [2024-06-20 16:47:48,743 INFO L495 AbstractCegarLoop]: Abstraction has has 245 places, 351 transitions, 5751 flow [2024-06-20 16:47:48,744 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.88888888888889) internal successors, (80), 9 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:47:48,744 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:47:48,744 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:47:48,744 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2024-06-20 16:47:48,744 INFO L420 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:47:48,744 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:47:48,745 INFO L85 PathProgramCache]: Analyzing trace with hash 1981977824, now seen corresponding path program 1 times [2024-06-20 16:47:48,745 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:47:48,745 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1830531060] [2024-06-20 16:47:48,745 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:47:48,745 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:47:48,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:47:53,303 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:47:53,303 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:47:53,304 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1830531060] [2024-06-20 16:47:53,304 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1830531060] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:47:53,304 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:47:53,304 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 16:47:53,304 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [366137439] [2024-06-20 16:47:53,304 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:47:53,304 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 16:47:53,305 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:47:53,305 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 16:47:53,305 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-20 16:47:53,381 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-20 16:47:53,381 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 245 places, 351 transitions, 5751 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:47:53,381 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:47:53,381 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-20 16:47:53,382 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:47:56,479 INFO L124 PetriNetUnfolderBase]: 6633/10679 cut-off events. [2024-06-20 16:47:56,479 INFO L125 PetriNetUnfolderBase]: For 532846/532889 co-relation queries the response was YES. [2024-06-20 16:47:56,560 INFO L83 FinitePrefix]: Finished finitePrefix Result has 70737 conditions, 10679 events. 6633/10679 cut-off events. For 532846/532889 co-relation queries the response was YES. Maximal size of possible extension queue 523. Compared 73066 event pairs, 2888 based on Foata normal form. 34/10681 useless extension candidates. Maximal degree in co-relation 70618. Up to 10125 conditions per place. [2024-06-20 16:47:56,595 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 276 selfloop transitions, 82 changer transitions 0/383 dead transitions. [2024-06-20 16:47:56,595 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 253 places, 383 transitions, 6617 flow [2024-06-20 16:47:56,596 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 16:47:56,596 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 16:47:56,596 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 149 transitions. [2024-06-20 16:47:56,596 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3941798941798942 [2024-06-20 16:47:56,596 INFO L175 Difference]: Start difference. First operand has 245 places, 351 transitions, 5751 flow. Second operand 9 states and 149 transitions. [2024-06-20 16:47:56,596 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 253 places, 383 transitions, 6617 flow [2024-06-20 16:47:57,612 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 248 places, 383 transitions, 6455 flow, removed 46 selfloop flow, removed 5 redundant places. [2024-06-20 16:47:57,617 INFO L231 Difference]: Finished difference. Result has 249 places, 353 transitions, 5821 flow [2024-06-20 16:47:57,618 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5589, PETRI_DIFFERENCE_MINUEND_PLACES=240, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=351, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=80, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=269, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5821, PETRI_PLACES=249, PETRI_TRANSITIONS=353} [2024-06-20 16:47:57,618 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 206 predicate places. [2024-06-20 16:47:57,618 INFO L495 AbstractCegarLoop]: Abstraction has has 249 places, 353 transitions, 5821 flow [2024-06-20 16:47:57,618 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:47:57,618 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:47:57,619 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:47:57,619 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2024-06-20 16:47:57,619 INFO L420 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:47:57,619 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:47:57,619 INFO L85 PathProgramCache]: Analyzing trace with hash 1455888612, now seen corresponding path program 2 times [2024-06-20 16:47:57,619 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:47:57,619 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [826568727] [2024-06-20 16:47:57,619 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:47:57,620 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:47:57,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:48:00,767 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:48:00,767 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:48:00,767 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [826568727] [2024-06-20 16:48:00,768 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [826568727] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:48:00,768 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:48:00,768 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 16:48:00,768 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1187185071] [2024-06-20 16:48:00,768 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:48:00,768 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 16:48:00,768 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:48:00,769 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 16:48:00,769 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-20 16:48:00,798 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-20 16:48:00,799 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 249 places, 353 transitions, 5821 flow. Second operand has 9 states, 9 states have (on average 8.88888888888889) internal successors, (80), 9 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:48:00,799 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:48:00,799 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-20 16:48:00,799 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:48:03,616 INFO L124 PetriNetUnfolderBase]: 6728/10794 cut-off events. [2024-06-20 16:48:03,616 INFO L125 PetriNetUnfolderBase]: For 530660/530662 co-relation queries the response was YES. [2024-06-20 16:48:03,686 INFO L83 FinitePrefix]: Finished finitePrefix Result has 71796 conditions, 10794 events. 6728/10794 cut-off events. For 530660/530662 co-relation queries the response was YES. Maximal size of possible extension queue 522. Compared 73583 event pairs, 2878 based on Foata normal form. 4/10797 useless extension candidates. Maximal degree in co-relation 71675. Up to 10197 conditions per place. [2024-06-20 16:48:03,717 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 271 selfloop transitions, 110 changer transitions 0/385 dead transitions. [2024-06-20 16:48:03,717 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 256 places, 385 transitions, 6841 flow [2024-06-20 16:48:03,718 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 16:48:03,718 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 16:48:03,718 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 135 transitions. [2024-06-20 16:48:03,718 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4017857142857143 [2024-06-20 16:48:03,718 INFO L175 Difference]: Start difference. First operand has 249 places, 353 transitions, 5821 flow. Second operand 8 states and 135 transitions. [2024-06-20 16:48:03,719 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 256 places, 385 transitions, 6841 flow [2024-06-20 16:48:04,670 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 249 places, 385 transitions, 6653 flow, removed 19 selfloop flow, removed 7 redundant places. [2024-06-20 16:48:04,676 INFO L231 Difference]: Finished difference. Result has 250 places, 356 transitions, 5949 flow [2024-06-20 16:48:04,676 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5633, PETRI_DIFFERENCE_MINUEND_PLACES=242, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=353, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=107, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=245, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5949, PETRI_PLACES=250, PETRI_TRANSITIONS=356} [2024-06-20 16:48:04,676 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 207 predicate places. [2024-06-20 16:48:04,676 INFO L495 AbstractCegarLoop]: Abstraction has has 250 places, 356 transitions, 5949 flow [2024-06-20 16:48:04,677 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.88888888888889) internal successors, (80), 9 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:48:04,677 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:48:04,677 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:48:04,677 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57 [2024-06-20 16:48:04,677 INFO L420 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:48:04,679 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:48:04,679 INFO L85 PathProgramCache]: Analyzing trace with hash 1694831652, now seen corresponding path program 3 times [2024-06-20 16:48:04,680 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:48:04,680 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [793379204] [2024-06-20 16:48:04,680 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:48:04,680 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:48:04,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:48:08,266 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:48:08,266 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:48:08,266 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [793379204] [2024-06-20 16:48:08,267 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [793379204] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:48:08,267 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:48:08,267 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 16:48:08,267 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1698666848] [2024-06-20 16:48:08,267 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:48:08,267 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 16:48:08,269 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:48:08,269 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 16:48:08,269 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-20 16:48:08,288 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-20 16:48:08,288 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 250 places, 356 transitions, 5949 flow. Second operand has 9 states, 9 states have (on average 8.88888888888889) internal successors, (80), 9 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:48:08,288 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:48:08,288 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-20 16:48:08,288 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:48:11,407 INFO L124 PetriNetUnfolderBase]: 6770/10886 cut-off events. [2024-06-20 16:48:11,407 INFO L125 PetriNetUnfolderBase]: For 560001/560026 co-relation queries the response was YES. [2024-06-20 16:48:11,482 INFO L83 FinitePrefix]: Finished finitePrefix Result has 72933 conditions, 10886 events. 6770/10886 cut-off events. For 560001/560026 co-relation queries the response was YES. Maximal size of possible extension queue 522. Compared 74272 event pairs, 2658 based on Foata normal form. 27/10912 useless extension candidates. Maximal degree in co-relation 72811. Up to 9941 conditions per place. [2024-06-20 16:48:11,515 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 258 selfloop transitions, 136 changer transitions 0/398 dead transitions. [2024-06-20 16:48:11,515 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 256 places, 398 transitions, 7392 flow [2024-06-20 16:48:11,516 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 16:48:11,516 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 16:48:11,516 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 129 transitions. [2024-06-20 16:48:11,516 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4387755102040816 [2024-06-20 16:48:11,516 INFO L175 Difference]: Start difference. First operand has 250 places, 356 transitions, 5949 flow. Second operand 7 states and 129 transitions. [2024-06-20 16:48:11,516 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 256 places, 398 transitions, 7392 flow [2024-06-20 16:48:12,458 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 251 places, 398 transitions, 7147 flow, removed 43 selfloop flow, removed 5 redundant places. [2024-06-20 16:48:12,464 INFO L231 Difference]: Finished difference. Result has 253 places, 368 transitions, 6370 flow [2024-06-20 16:48:12,464 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5714, PETRI_DIFFERENCE_MINUEND_PLACES=245, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=356, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=127, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=228, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=6370, PETRI_PLACES=253, PETRI_TRANSITIONS=368} [2024-06-20 16:48:12,464 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 210 predicate places. [2024-06-20 16:48:12,464 INFO L495 AbstractCegarLoop]: Abstraction has has 253 places, 368 transitions, 6370 flow [2024-06-20 16:48:12,465 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.88888888888889) internal successors, (80), 9 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:48:12,465 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:48:12,465 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:48:12,465 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58 [2024-06-20 16:48:12,465 INFO L420 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:48:12,465 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:48:12,465 INFO L85 PathProgramCache]: Analyzing trace with hash 1695217602, now seen corresponding path program 4 times [2024-06-20 16:48:12,465 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:48:12,466 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [383785404] [2024-06-20 16:48:12,466 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:48:12,466 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:48:12,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:48:16,170 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:48:16,171 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:48:16,171 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [383785404] [2024-06-20 16:48:16,171 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [383785404] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:48:16,171 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:48:16,171 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 16:48:16,171 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1796633199] [2024-06-20 16:48:16,171 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:48:16,171 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 16:48:16,171 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:48:16,172 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 16:48:16,172 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-20 16:48:16,201 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-20 16:48:16,201 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 253 places, 368 transitions, 6370 flow. Second operand has 9 states, 9 states have (on average 8.88888888888889) internal successors, (80), 9 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:48:16,201 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:48:16,201 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-20 16:48:16,201 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:48:19,392 INFO L124 PetriNetUnfolderBase]: 6764/10874 cut-off events. [2024-06-20 16:48:19,392 INFO L125 PetriNetUnfolderBase]: For 566875/566900 co-relation queries the response was YES. [2024-06-20 16:48:19,477 INFO L83 FinitePrefix]: Finished finitePrefix Result has 74416 conditions, 10874 events. 6764/10874 cut-off events. For 566875/566900 co-relation queries the response was YES. Maximal size of possible extension queue 522. Compared 74140 event pairs, 2667 based on Foata normal form. 27/10900 useless extension candidates. Maximal degree in co-relation 74292. Up to 9938 conditions per place. [2024-06-20 16:48:19,510 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 251 selfloop transitions, 137 changer transitions 0/392 dead transitions. [2024-06-20 16:48:19,510 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 259 places, 392 transitions, 7406 flow [2024-06-20 16:48:19,511 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 16:48:19,511 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 16:48:19,512 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 122 transitions. [2024-06-20 16:48:19,512 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41496598639455784 [2024-06-20 16:48:19,512 INFO L175 Difference]: Start difference. First operand has 253 places, 368 transitions, 6370 flow. Second operand 7 states and 122 transitions. [2024-06-20 16:48:19,512 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 259 places, 392 transitions, 7406 flow [2024-06-20 16:48:20,645 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 257 places, 392 transitions, 7272 flow, removed 61 selfloop flow, removed 2 redundant places. [2024-06-20 16:48:20,651 INFO L231 Difference]: Finished difference. Result has 258 places, 368 transitions, 6516 flow [2024-06-20 16:48:20,651 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6236, PETRI_DIFFERENCE_MINUEND_PLACES=251, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=368, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=137, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=231, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=6516, PETRI_PLACES=258, PETRI_TRANSITIONS=368} [2024-06-20 16:48:20,651 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 215 predicate places. [2024-06-20 16:48:20,651 INFO L495 AbstractCegarLoop]: Abstraction has has 258 places, 368 transitions, 6516 flow [2024-06-20 16:48:20,651 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.88888888888889) internal successors, (80), 9 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:48:20,651 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:48:20,652 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:48:20,652 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59 [2024-06-20 16:48:20,652 INFO L420 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:48:20,652 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:48:20,652 INFO L85 PathProgramCache]: Analyzing trace with hash -1629151870, now seen corresponding path program 5 times [2024-06-20 16:48:20,652 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:48:20,652 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1760242828] [2024-06-20 16:48:20,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:48:20,653 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:48:20,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:48:23,957 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:48:23,957 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:48:23,957 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1760242828] [2024-06-20 16:48:23,957 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1760242828] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:48:23,958 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:48:23,958 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 16:48:23,958 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [146722539] [2024-06-20 16:48:23,958 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:48:23,958 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 16:48:23,958 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:48:23,959 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 16:48:23,959 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-20 16:48:23,993 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-20 16:48:23,993 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 258 places, 368 transitions, 6516 flow. Second operand has 9 states, 9 states have (on average 8.88888888888889) internal successors, (80), 9 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:48:23,993 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:48:23,993 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-20 16:48:23,993 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:48:26,888 INFO L124 PetriNetUnfolderBase]: 6746/10852 cut-off events. [2024-06-20 16:48:26,888 INFO L125 PetriNetUnfolderBase]: For 581365/581390 co-relation queries the response was YES. [2024-06-20 16:48:26,985 INFO L83 FinitePrefix]: Finished finitePrefix Result has 74204 conditions, 10852 events. 6746/10852 cut-off events. For 581365/581390 co-relation queries the response was YES. Maximal size of possible extension queue 522. Compared 74057 event pairs, 2572 based on Foata normal form. 31/10882 useless extension candidates. Maximal degree in co-relation 74078. Up to 10067 conditions per place. [2024-06-20 16:48:27,023 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 268 selfloop transitions, 124 changer transitions 0/396 dead transitions. [2024-06-20 16:48:27,023 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 264 places, 396 transitions, 7576 flow [2024-06-20 16:48:27,024 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 16:48:27,024 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 16:48:27,024 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 128 transitions. [2024-06-20 16:48:27,024 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43537414965986393 [2024-06-20 16:48:27,024 INFO L175 Difference]: Start difference. First operand has 258 places, 368 transitions, 6516 flow. Second operand 7 states and 128 transitions. [2024-06-20 16:48:27,025 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 264 places, 396 transitions, 7576 flow [2024-06-20 16:48:28,265 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 259 places, 396 transitions, 7186 flow, removed 60 selfloop flow, removed 5 redundant places. [2024-06-20 16:48:28,270 INFO L231 Difference]: Finished difference. Result has 260 places, 368 transitions, 6385 flow [2024-06-20 16:48:28,271 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6126, PETRI_DIFFERENCE_MINUEND_PLACES=253, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=368, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=124, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=244, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=6385, PETRI_PLACES=260, PETRI_TRANSITIONS=368} [2024-06-20 16:48:28,271 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 217 predicate places. [2024-06-20 16:48:28,271 INFO L495 AbstractCegarLoop]: Abstraction has has 260 places, 368 transitions, 6385 flow [2024-06-20 16:48:28,271 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.88888888888889) internal successors, (80), 9 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:48:28,271 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:48:28,272 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:48:28,272 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60 [2024-06-20 16:48:28,272 INFO L420 AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:48:28,272 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:48:28,273 INFO L85 PathProgramCache]: Analyzing trace with hash -1114657786, now seen corresponding path program 2 times [2024-06-20 16:48:28,273 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:48:28,273 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1414520425] [2024-06-20 16:48:28,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:48:28,273 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:48:28,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:48:33,123 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:48:33,123 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:48:33,123 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1414520425] [2024-06-20 16:48:33,123 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1414520425] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:48:33,123 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:48:33,124 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 16:48:33,124 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [450495063] [2024-06-20 16:48:33,124 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:48:33,124 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 16:48:33,124 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:48:33,124 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 16:48:33,125 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-20 16:48:33,180 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-20 16:48:33,181 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 260 places, 368 transitions, 6385 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:48:33,181 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:48:33,181 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-20 16:48:33,181 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:48:36,076 INFO L124 PetriNetUnfolderBase]: 6701/10800 cut-off events. [2024-06-20 16:48:36,076 INFO L125 PetriNetUnfolderBase]: For 621488/621545 co-relation queries the response was YES. [2024-06-20 16:48:36,164 INFO L83 FinitePrefix]: Finished finitePrefix Result has 74095 conditions, 10800 events. 6701/10800 cut-off events. For 621488/621545 co-relation queries the response was YES. Maximal size of possible extension queue 528. Compared 73896 event pairs, 2549 based on Foata normal form. 52/10816 useless extension candidates. Maximal degree in co-relation 73969. Up to 9939 conditions per place. [2024-06-20 16:48:36,197 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 250 selfloop transitions, 126 changer transitions 0/401 dead transitions. [2024-06-20 16:48:36,198 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 267 places, 401 transitions, 7503 flow [2024-06-20 16:48:36,199 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 16:48:36,199 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 16:48:36,199 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 144 transitions. [2024-06-20 16:48:36,201 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42857142857142855 [2024-06-20 16:48:36,201 INFO L175 Difference]: Start difference. First operand has 260 places, 368 transitions, 6385 flow. Second operand 8 states and 144 transitions. [2024-06-20 16:48:36,201 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 267 places, 401 transitions, 7503 flow [2024-06-20 16:48:37,339 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 259 places, 401 transitions, 7139 flow, removed 0 selfloop flow, removed 8 redundant places. [2024-06-20 16:48:37,345 INFO L231 Difference]: Finished difference. Result has 260 places, 370 transitions, 6338 flow [2024-06-20 16:48:37,345 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6021, PETRI_DIFFERENCE_MINUEND_PLACES=252, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=368, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=124, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=242, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6338, PETRI_PLACES=260, PETRI_TRANSITIONS=370} [2024-06-20 16:48:37,345 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 217 predicate places. [2024-06-20 16:48:37,345 INFO L495 AbstractCegarLoop]: Abstraction has has 260 places, 370 transitions, 6338 flow [2024-06-20 16:48:37,346 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:48:37,346 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:48:37,346 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:48:37,346 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61 [2024-06-20 16:48:37,346 INFO L420 AbstractCegarLoop]: === Iteration 63 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:48:37,346 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:48:37,346 INFO L85 PathProgramCache]: Analyzing trace with hash -1126679896, now seen corresponding path program 3 times [2024-06-20 16:48:37,347 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:48:37,347 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [97097110] [2024-06-20 16:48:37,347 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:48:37,347 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:48:37,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:48:41,980 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:48:41,980 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:48:41,980 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [97097110] [2024-06-20 16:48:41,980 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [97097110] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:48:41,980 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:48:41,980 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 16:48:41,981 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [469163837] [2024-06-20 16:48:41,981 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:48:41,981 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 16:48:41,981 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:48:41,981 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 16:48:41,982 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-20 16:48:42,023 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-20 16:48:42,024 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 260 places, 370 transitions, 6338 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:48:42,024 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:48:42,024 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-20 16:48:42,024 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:48:44,897 INFO L124 PetriNetUnfolderBase]: 6756/10856 cut-off events. [2024-06-20 16:48:44,898 INFO L125 PetriNetUnfolderBase]: For 645084/645127 co-relation queries the response was YES. [2024-06-20 16:48:44,993 INFO L83 FinitePrefix]: Finished finitePrefix Result has 75127 conditions, 10856 events. 6756/10856 cut-off events. For 645084/645127 co-relation queries the response was YES. Maximal size of possible extension queue 533. Compared 74362 event pairs, 2884 based on Foata normal form. 34/10858 useless extension candidates. Maximal degree in co-relation 75000. Up to 10127 conditions per place. [2024-06-20 16:48:45,030 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 278 selfloop transitions, 102 changer transitions 0/405 dead transitions. [2024-06-20 16:48:45,030 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 267 places, 405 transitions, 7270 flow [2024-06-20 16:48:45,031 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 16:48:45,031 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 16:48:45,031 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 142 transitions. [2024-06-20 16:48:45,032 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4226190476190476 [2024-06-20 16:48:45,032 INFO L175 Difference]: Start difference. First operand has 260 places, 370 transitions, 6338 flow. Second operand 8 states and 142 transitions. [2024-06-20 16:48:45,032 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 267 places, 405 transitions, 7270 flow [2024-06-20 16:48:46,219 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 261 places, 405 transitions, 6981 flow, removed 21 selfloop flow, removed 6 redundant places. [2024-06-20 16:48:46,224 INFO L231 Difference]: Finished difference. Result has 262 places, 372 transitions, 6339 flow [2024-06-20 16:48:46,225 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6049, PETRI_DIFFERENCE_MINUEND_PLACES=254, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=370, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=100, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=268, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6339, PETRI_PLACES=262, PETRI_TRANSITIONS=372} [2024-06-20 16:48:46,225 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 219 predicate places. [2024-06-20 16:48:46,225 INFO L495 AbstractCegarLoop]: Abstraction has has 262 places, 372 transitions, 6339 flow [2024-06-20 16:48:46,225 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:48:46,226 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:48:46,226 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:48:46,226 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62 [2024-06-20 16:48:46,226 INFO L420 AbstractCegarLoop]: === Iteration 64 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:48:46,226 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:48:46,226 INFO L85 PathProgramCache]: Analyzing trace with hash 454352602, now seen corresponding path program 4 times [2024-06-20 16:48:46,226 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:48:46,227 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1327127961] [2024-06-20 16:48:46,227 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:48:46,227 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:48:46,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:48:50,044 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:48:50,044 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:48:50,044 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1327127961] [2024-06-20 16:48:50,044 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1327127961] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:48:50,045 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:48:50,045 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 16:48:50,045 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [385986239] [2024-06-20 16:48:50,045 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:48:50,045 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 16:48:50,045 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:48:50,046 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 16:48:50,046 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-20 16:48:50,112 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-20 16:48:50,112 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 262 places, 372 transitions, 6339 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:48:50,112 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:48:50,112 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-20 16:48:50,112 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:48:53,345 INFO L124 PetriNetUnfolderBase]: 6864/11057 cut-off events. [2024-06-20 16:48:53,345 INFO L125 PetriNetUnfolderBase]: For 677852/677909 co-relation queries the response was YES. [2024-06-20 16:48:53,434 INFO L83 FinitePrefix]: Finished finitePrefix Result has 76860 conditions, 11057 events. 6864/11057 cut-off events. For 677852/677909 co-relation queries the response was YES. Maximal size of possible extension queue 550. Compared 75834 event pairs, 2560 based on Foata normal form. 52/11073 useless extension candidates. Maximal degree in co-relation 76732. Up to 9784 conditions per place. [2024-06-20 16:48:53,470 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 253 selfloop transitions, 133 changer transitions 0/411 dead transitions. [2024-06-20 16:48:53,471 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 269 places, 411 transitions, 7665 flow [2024-06-20 16:48:53,472 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 16:48:53,472 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 16:48:53,472 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 148 transitions. [2024-06-20 16:48:53,472 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44047619047619047 [2024-06-20 16:48:53,473 INFO L175 Difference]: Start difference. First operand has 262 places, 372 transitions, 6339 flow. Second operand 8 states and 148 transitions. [2024-06-20 16:48:53,473 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 269 places, 411 transitions, 7665 flow [2024-06-20 16:48:54,861 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 263 places, 411 transitions, 7441 flow, removed 21 selfloop flow, removed 6 redundant places. [2024-06-20 16:48:54,867 INFO L231 Difference]: Finished difference. Result has 264 places, 375 transitions, 6476 flow [2024-06-20 16:48:54,867 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6115, PETRI_DIFFERENCE_MINUEND_PLACES=256, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=372, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=131, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=240, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6476, PETRI_PLACES=264, PETRI_TRANSITIONS=375} [2024-06-20 16:48:54,868 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 221 predicate places. [2024-06-20 16:48:54,868 INFO L495 AbstractCegarLoop]: Abstraction has has 264 places, 375 transitions, 6476 flow [2024-06-20 16:48:54,869 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:48:54,869 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:48:54,869 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:48:54,869 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63 [2024-06-20 16:48:54,869 INFO L420 AbstractCegarLoop]: === Iteration 65 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:48:54,869 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:48:54,869 INFO L85 PathProgramCache]: Analyzing trace with hash 465659908, now seen corresponding path program 1 times [2024-06-20 16:48:54,870 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:48:54,870 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2064190384] [2024-06-20 16:48:54,870 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:48:54,870 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:48:54,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:48:58,267 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:48:58,267 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:48:58,267 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2064190384] [2024-06-20 16:48:58,267 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2064190384] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:48:58,267 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:48:58,267 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 16:48:58,268 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [796572300] [2024-06-20 16:48:58,268 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:48:58,268 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 16:48:58,268 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:48:58,268 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 16:48:58,268 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-20 16:48:58,278 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-20 16:48:58,278 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 264 places, 375 transitions, 6476 flow. Second operand has 9 states, 9 states have (on average 9.0) internal successors, (81), 9 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:48:58,278 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:48:58,278 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-20 16:48:58,279 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:49:01,428 INFO L124 PetriNetUnfolderBase]: 7052/11310 cut-off events. [2024-06-20 16:49:01,428 INFO L125 PetriNetUnfolderBase]: For 693314/693316 co-relation queries the response was YES. [2024-06-20 16:49:01,508 INFO L83 FinitePrefix]: Finished finitePrefix Result has 79485 conditions, 11310 events. 7052/11310 cut-off events. For 693314/693316 co-relation queries the response was YES. Maximal size of possible extension queue 552. Compared 77283 event pairs, 2929 based on Foata normal form. 4/11313 useless extension candidates. Maximal degree in co-relation 79356. Up to 10889 conditions per place. [2024-06-20 16:49:01,541 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 375 selfloop transitions, 32 changer transitions 0/411 dead transitions. [2024-06-20 16:49:01,541 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 270 places, 411 transitions, 7646 flow [2024-06-20 16:49:01,542 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 16:49:01,542 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 16:49:01,542 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 126 transitions. [2024-06-20 16:49:01,542 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42857142857142855 [2024-06-20 16:49:01,542 INFO L175 Difference]: Start difference. First operand has 264 places, 375 transitions, 6476 flow. Second operand 7 states and 126 transitions. [2024-06-20 16:49:01,542 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 270 places, 411 transitions, 7646 flow [2024-06-20 16:49:02,735 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 266 places, 411 transitions, 7440 flow, removed 25 selfloop flow, removed 4 redundant places. [2024-06-20 16:49:02,741 INFO L231 Difference]: Finished difference. Result has 267 places, 379 transitions, 6479 flow [2024-06-20 16:49:02,750 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6270, PETRI_DIFFERENCE_MINUEND_PLACES=260, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=375, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=345, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=6479, PETRI_PLACES=267, PETRI_TRANSITIONS=379} [2024-06-20 16:49:02,751 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 224 predicate places. [2024-06-20 16:49:02,751 INFO L495 AbstractCegarLoop]: Abstraction has has 267 places, 379 transitions, 6479 flow [2024-06-20 16:49:02,751 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.0) internal successors, (81), 9 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:49:02,751 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:49:02,751 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:49:02,751 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64 [2024-06-20 16:49:02,751 INFO L420 AbstractCegarLoop]: === Iteration 66 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:49:02,752 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:49:02,752 INFO L85 PathProgramCache]: Analyzing trace with hash 1692430020, now seen corresponding path program 2 times [2024-06-20 16:49:02,752 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:49:02,752 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [326957461] [2024-06-20 16:49:02,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:49:02,752 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:49:02,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:49:06,115 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:49:06,115 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:49:06,115 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [326957461] [2024-06-20 16:49:06,115 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [326957461] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:49:06,115 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:49:06,115 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 16:49:06,115 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1393520555] [2024-06-20 16:49:06,115 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:49:06,115 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 16:49:06,115 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:49:06,116 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 16:49:06,116 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-20 16:49:06,171 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-20 16:49:06,172 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 267 places, 379 transitions, 6479 flow. Second operand has 9 states, 9 states have (on average 9.0) internal successors, (81), 9 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:49:06,172 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:49:06,172 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-20 16:49:06,172 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:49:09,314 INFO L124 PetriNetUnfolderBase]: 7060/11328 cut-off events. [2024-06-20 16:49:09,315 INFO L125 PetriNetUnfolderBase]: For 712162/712164 co-relation queries the response was YES. [2024-06-20 16:49:09,421 INFO L83 FinitePrefix]: Finished finitePrefix Result has 79939 conditions, 11328 events. 7060/11328 cut-off events. For 712162/712164 co-relation queries the response was YES. Maximal size of possible extension queue 552. Compared 77520 event pairs, 2965 based on Foata normal form. 4/11331 useless extension candidates. Maximal degree in co-relation 79808. Up to 11016 conditions per place. [2024-06-20 16:49:09,463 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 370 selfloop transitions, 29 changer transitions 0/403 dead transitions. [2024-06-20 16:49:09,464 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 273 places, 403 transitions, 7405 flow [2024-06-20 16:49:09,464 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 16:49:09,464 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 16:49:09,465 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 116 transitions. [2024-06-20 16:49:09,465 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3945578231292517 [2024-06-20 16:49:09,465 INFO L175 Difference]: Start difference. First operand has 267 places, 379 transitions, 6479 flow. Second operand 7 states and 116 transitions. [2024-06-20 16:49:09,465 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 273 places, 403 transitions, 7405 flow [2024-06-20 16:49:10,988 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 270 places, 403 transitions, 7297 flow, removed 38 selfloop flow, removed 3 redundant places. [2024-06-20 16:49:10,994 INFO L231 Difference]: Finished difference. Result has 271 places, 381 transitions, 6510 flow [2024-06-20 16:49:10,994 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6377, PETRI_DIFFERENCE_MINUEND_PLACES=264, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=379, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=350, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=6510, PETRI_PLACES=271, PETRI_TRANSITIONS=381} [2024-06-20 16:49:10,994 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 228 predicate places. [2024-06-20 16:49:10,994 INFO L495 AbstractCegarLoop]: Abstraction has has 271 places, 381 transitions, 6510 flow [2024-06-20 16:49:10,995 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.0) internal successors, (81), 9 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:49:10,995 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:49:10,995 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:49:10,995 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65 [2024-06-20 16:49:10,995 INFO L420 AbstractCegarLoop]: === Iteration 67 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:49:10,995 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:49:10,995 INFO L85 PathProgramCache]: Analyzing trace with hash -1629142942, now seen corresponding path program 3 times [2024-06-20 16:49:10,996 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:49:10,996 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [322351198] [2024-06-20 16:49:10,996 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:49:10,996 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:49:11,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:49:14,387 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:49:14,387 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:49:14,387 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [322351198] [2024-06-20 16:49:14,388 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [322351198] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:49:14,388 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:49:14,388 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 16:49:14,388 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [302987360] [2024-06-20 16:49:14,388 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:49:14,388 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 16:49:14,388 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:49:14,389 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 16:49:14,389 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-20 16:49:14,402 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-20 16:49:14,402 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 271 places, 381 transitions, 6510 flow. Second operand has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:49:14,402 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:49:14,402 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-20 16:49:14,402 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:49:17,432 INFO L124 PetriNetUnfolderBase]: 7027/11281 cut-off events. [2024-06-20 16:49:17,432 INFO L125 PetriNetUnfolderBase]: For 731325/731327 co-relation queries the response was YES. [2024-06-20 16:49:17,540 INFO L83 FinitePrefix]: Finished finitePrefix Result has 79275 conditions, 11281 events. 7027/11281 cut-off events. For 731325/731327 co-relation queries the response was YES. Maximal size of possible extension queue 550. Compared 77135 event pairs, 2904 based on Foata normal form. 16/11296 useless extension candidates. Maximal degree in co-relation 79142. Up to 10919 conditions per place. [2024-06-20 16:49:17,578 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 380 selfloop transitions, 27 changer transitions 0/411 dead transitions. [2024-06-20 16:49:17,578 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 277 places, 411 transitions, 7430 flow [2024-06-20 16:49:17,578 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 16:49:17,579 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 16:49:17,579 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 125 transitions. [2024-06-20 16:49:17,579 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42517006802721086 [2024-06-20 16:49:17,579 INFO L175 Difference]: Start difference. First operand has 271 places, 381 transitions, 6510 flow. Second operand 7 states and 125 transitions. [2024-06-20 16:49:17,579 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 277 places, 411 transitions, 7430 flow [2024-06-20 16:49:18,928 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 272 places, 411 transitions, 7269 flow, removed 53 selfloop flow, removed 5 redundant places. [2024-06-20 16:49:18,933 INFO L231 Difference]: Finished difference. Result has 273 places, 381 transitions, 6412 flow [2024-06-20 16:49:18,933 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6349, PETRI_DIFFERENCE_MINUEND_PLACES=266, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=381, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=354, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=6412, PETRI_PLACES=273, PETRI_TRANSITIONS=381} [2024-06-20 16:49:18,934 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 230 predicate places. [2024-06-20 16:49:18,934 INFO L495 AbstractCegarLoop]: Abstraction has has 273 places, 381 transitions, 6412 flow [2024-06-20 16:49:18,934 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:49:18,934 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:49:18,934 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:49:18,934 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66 [2024-06-20 16:49:18,935 INFO L420 AbstractCegarLoop]: === Iteration 68 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:49:18,935 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:49:18,935 INFO L85 PathProgramCache]: Analyzing trace with hash 731051469, now seen corresponding path program 1 times [2024-06-20 16:49:18,935 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:49:18,935 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1147247465] [2024-06-20 16:49:18,935 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:49:18,935 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:49:18,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:49:23,006 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:49:23,007 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:49:23,007 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1147247465] [2024-06-20 16:49:23,007 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1147247465] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:49:23,007 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:49:23,007 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 16:49:23,007 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1821971192] [2024-06-20 16:49:23,008 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:49:23,008 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 16:49:23,008 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:49:23,008 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 16:49:23,008 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-20 16:49:23,152 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-20 16:49:23,153 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 273 places, 381 transitions, 6412 flow. Second operand has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:49:23,153 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:49:23,153 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-20 16:49:23,153 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:49:26,413 INFO L124 PetriNetUnfolderBase]: 7055/11323 cut-off events. [2024-06-20 16:49:26,413 INFO L125 PetriNetUnfolderBase]: For 740957/740957 co-relation queries the response was YES. [2024-06-20 16:49:26,517 INFO L83 FinitePrefix]: Finished finitePrefix Result has 79658 conditions, 11323 events. 7055/11323 cut-off events. For 740957/740957 co-relation queries the response was YES. Maximal size of possible extension queue 550. Compared 77181 event pairs, 2816 based on Foata normal form. 8/11330 useless extension candidates. Maximal degree in co-relation 79524. Up to 10974 conditions per place. [2024-06-20 16:49:26,556 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 388 selfloop transitions, 33 changer transitions 0/425 dead transitions. [2024-06-20 16:49:26,557 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 281 places, 425 transitions, 7431 flow [2024-06-20 16:49:26,557 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 16:49:26,557 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 16:49:26,558 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 149 transitions. [2024-06-20 16:49:26,558 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3941798941798942 [2024-06-20 16:49:26,558 INFO L175 Difference]: Start difference. First operand has 273 places, 381 transitions, 6412 flow. Second operand 9 states and 149 transitions. [2024-06-20 16:49:26,558 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 281 places, 425 transitions, 7431 flow [2024-06-20 16:49:27,767 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 275 places, 425 transitions, 7370 flow, removed 2 selfloop flow, removed 6 redundant places. [2024-06-20 16:49:27,773 INFO L231 Difference]: Finished difference. Result has 277 places, 384 transitions, 6480 flow [2024-06-20 16:49:27,773 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6351, PETRI_DIFFERENCE_MINUEND_PLACES=267, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=381, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=349, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6480, PETRI_PLACES=277, PETRI_TRANSITIONS=384} [2024-06-20 16:49:27,773 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 234 predicate places. [2024-06-20 16:49:27,774 INFO L495 AbstractCegarLoop]: Abstraction has has 277 places, 384 transitions, 6480 flow [2024-06-20 16:49:27,774 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:49:27,774 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:49:27,774 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:49:27,774 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67 [2024-06-20 16:49:27,774 INFO L420 AbstractCegarLoop]: === Iteration 69 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:49:27,774 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:49:27,775 INFO L85 PathProgramCache]: Analyzing trace with hash 997075179, now seen corresponding path program 2 times [2024-06-20 16:49:27,775 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:49:27,775 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1990289154] [2024-06-20 16:49:27,775 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:49:27,775 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:49:27,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:49:31,421 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:49:31,421 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:49:31,422 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1990289154] [2024-06-20 16:49:31,422 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1990289154] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:49:31,422 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:49:31,422 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 16:49:31,422 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1034714596] [2024-06-20 16:49:31,422 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:49:31,423 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 16:49:31,423 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:49:31,423 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 16:49:31,423 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-20 16:49:31,441 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-20 16:49:31,441 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 277 places, 384 transitions, 6480 flow. Second operand has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:49:31,441 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:49:31,441 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-20 16:49:31,441 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:49:34,631 INFO L124 PetriNetUnfolderBase]: 7091/11379 cut-off events. [2024-06-20 16:49:34,631 INFO L125 PetriNetUnfolderBase]: For 766558/766558 co-relation queries the response was YES. [2024-06-20 16:49:34,737 INFO L83 FinitePrefix]: Finished finitePrefix Result has 80332 conditions, 11379 events. 7091/11379 cut-off events. For 766558/766558 co-relation queries the response was YES. Maximal size of possible extension queue 550. Compared 77936 event pairs, 3049 based on Foata normal form. 10/11388 useless extension candidates. Maximal degree in co-relation 80196. Up to 11070 conditions per place. [2024-06-20 16:49:34,776 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 386 selfloop transitions, 32 changer transitions 0/422 dead transitions. [2024-06-20 16:49:34,777 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 285 places, 422 transitions, 7452 flow [2024-06-20 16:49:34,778 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 16:49:34,778 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 16:49:34,778 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 146 transitions. [2024-06-20 16:49:34,778 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3862433862433862 [2024-06-20 16:49:34,778 INFO L175 Difference]: Start difference. First operand has 277 places, 384 transitions, 6480 flow. Second operand 9 states and 146 transitions. [2024-06-20 16:49:34,779 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 285 places, 422 transitions, 7452 flow [2024-06-20 16:49:36,362 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 279 places, 422 transitions, 7354 flow, removed 18 selfloop flow, removed 6 redundant places. [2024-06-20 16:49:36,368 INFO L231 Difference]: Finished difference. Result has 280 places, 385 transitions, 6462 flow [2024-06-20 16:49:36,368 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6382, PETRI_DIFFERENCE_MINUEND_PLACES=271, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=384, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=352, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6462, PETRI_PLACES=280, PETRI_TRANSITIONS=385} [2024-06-20 16:49:36,368 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 237 predicate places. [2024-06-20 16:49:36,368 INFO L495 AbstractCegarLoop]: Abstraction has has 280 places, 385 transitions, 6462 flow [2024-06-20 16:49:36,369 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:49:36,369 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:49:36,369 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:49:36,369 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68 [2024-06-20 16:49:36,369 INFO L420 AbstractCegarLoop]: === Iteration 70 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:49:36,369 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:49:36,369 INFO L85 PathProgramCache]: Analyzing trace with hash 738460779, now seen corresponding path program 3 times [2024-06-20 16:49:36,370 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:49:36,370 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2139738960] [2024-06-20 16:49:36,370 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:49:36,370 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:49:36,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:49:40,428 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:49:40,429 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:49:40,429 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2139738960] [2024-06-20 16:49:40,429 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2139738960] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:49:40,429 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:49:40,429 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 16:49:40,429 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [710232271] [2024-06-20 16:49:40,429 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:49:40,429 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 16:49:40,429 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:49:40,429 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 16:49:40,429 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-20 16:49:40,476 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-20 16:49:40,476 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 280 places, 385 transitions, 6462 flow. Second operand has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:49:40,476 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:49:40,476 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-20 16:49:40,476 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:49:43,708 INFO L124 PetriNetUnfolderBase]: 7127/11435 cut-off events. [2024-06-20 16:49:43,709 INFO L125 PetriNetUnfolderBase]: For 786053/786053 co-relation queries the response was YES. [2024-06-20 16:49:43,812 INFO L83 FinitePrefix]: Finished finitePrefix Result has 80887 conditions, 11435 events. 7127/11435 cut-off events. For 786053/786053 co-relation queries the response was YES. Maximal size of possible extension queue 550. Compared 78325 event pairs, 3045 based on Foata normal form. 8/11442 useless extension candidates. Maximal degree in co-relation 80750. Up to 11088 conditions per place. [2024-06-20 16:49:43,846 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 391 selfloop transitions, 35 changer transitions 0/430 dead transitions. [2024-06-20 16:49:43,847 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 289 places, 430 transitions, 7496 flow [2024-06-20 16:49:43,847 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 16:49:43,847 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 16:49:43,848 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 160 transitions. [2024-06-20 16:49:43,848 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38095238095238093 [2024-06-20 16:49:43,848 INFO L175 Difference]: Start difference. First operand has 280 places, 385 transitions, 6462 flow. Second operand 10 states and 160 transitions. [2024-06-20 16:49:43,848 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 289 places, 430 transitions, 7496 flow [2024-06-20 16:49:45,468 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 282 places, 430 transitions, 7433 flow, removed 1 selfloop flow, removed 7 redundant places. [2024-06-20 16:49:45,474 INFO L231 Difference]: Finished difference. Result has 284 places, 388 transitions, 6518 flow [2024-06-20 16:49:45,474 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6399, PETRI_DIFFERENCE_MINUEND_PLACES=273, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=385, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=350, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=6518, PETRI_PLACES=284, PETRI_TRANSITIONS=388} [2024-06-20 16:49:45,474 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 241 predicate places. [2024-06-20 16:49:45,474 INFO L495 AbstractCegarLoop]: Abstraction has has 284 places, 388 transitions, 6518 flow [2024-06-20 16:49:45,474 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:49:45,475 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:49:45,475 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:49:45,475 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable69 [2024-06-20 16:49:45,475 INFO L420 AbstractCegarLoop]: === Iteration 71 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:49:45,475 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:49:45,475 INFO L85 PathProgramCache]: Analyzing trace with hash 819589329, now seen corresponding path program 1 times [2024-06-20 16:49:45,475 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:49:45,476 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1712898489] [2024-06-20 16:49:45,476 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:49:45,476 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:49:45,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:49:48,859 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:49:48,859 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:49:48,859 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1712898489] [2024-06-20 16:49:48,860 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1712898489] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:49:48,860 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:49:48,860 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 16:49:48,860 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [645947824] [2024-06-20 16:49:48,860 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:49:48,860 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 16:49:48,860 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:49:48,860 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 16:49:48,860 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-20 16:49:48,892 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-20 16:49:48,893 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 284 places, 388 transitions, 6518 flow. Second operand has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:49:48,893 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:49:48,893 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-20 16:49:48,893 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:49:52,706 INFO L124 PetriNetUnfolderBase]: 7217/11561 cut-off events. [2024-06-20 16:49:52,707 INFO L125 PetriNetUnfolderBase]: For 816232/816234 co-relation queries the response was YES. [2024-06-20 16:49:52,805 INFO L83 FinitePrefix]: Finished finitePrefix Result has 82902 conditions, 11561 events. 7217/11561 cut-off events. For 816232/816234 co-relation queries the response was YES. Maximal size of possible extension queue 551. Compared 78947 event pairs, 2863 based on Foata normal form. 4/11564 useless extension candidates. Maximal degree in co-relation 82763. Up to 10192 conditions per place. [2024-06-20 16:49:52,842 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 266 selfloop transitions, 188 changer transitions 0/458 dead transitions. [2024-06-20 16:49:52,842 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 295 places, 458 transitions, 8186 flow [2024-06-20 16:49:52,843 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-20 16:49:52,843 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-20 16:49:52,843 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 217 transitions. [2024-06-20 16:49:52,843 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4305555555555556 [2024-06-20 16:49:52,844 INFO L175 Difference]: Start difference. First operand has 284 places, 388 transitions, 6518 flow. Second operand 12 states and 217 transitions. [2024-06-20 16:49:52,844 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 295 places, 458 transitions, 8186 flow [2024-06-20 16:49:54,280 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 288 places, 458 transitions, 8120 flow, removed 2 selfloop flow, removed 7 redundant places. [2024-06-20 16:49:54,286 INFO L231 Difference]: Finished difference. Result has 289 places, 397 transitions, 7022 flow [2024-06-20 16:49:54,287 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6452, PETRI_DIFFERENCE_MINUEND_PLACES=277, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=388, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=182, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=205, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=7022, PETRI_PLACES=289, PETRI_TRANSITIONS=397} [2024-06-20 16:49:54,287 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 246 predicate places. [2024-06-20 16:49:54,287 INFO L495 AbstractCegarLoop]: Abstraction has has 289 places, 397 transitions, 7022 flow [2024-06-20 16:49:54,287 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:49:54,287 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:49:54,288 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:49:54,288 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70 [2024-06-20 16:49:54,288 INFO L420 AbstractCegarLoop]: === Iteration 72 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:49:54,288 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:49:54,288 INFO L85 PathProgramCache]: Analyzing trace with hash 819709485, now seen corresponding path program 1 times [2024-06-20 16:49:54,288 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:49:54,289 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1652078742] [2024-06-20 16:49:54,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:49:54,289 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:49:54,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:49:57,954 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:49:57,954 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:49:57,954 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1652078742] [2024-06-20 16:49:57,954 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1652078742] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:49:57,954 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:49:57,954 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 16:49:57,954 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1426976160] [2024-06-20 16:49:57,954 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:49:57,954 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 16:49:57,955 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:49:57,955 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 16:49:57,955 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-20 16:49:57,969 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-20 16:49:57,969 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 289 places, 397 transitions, 7022 flow. Second operand has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:49:57,969 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:49:57,969 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-20 16:49:57,969 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:50:01,513 INFO L124 PetriNetUnfolderBase]: 7282/11648 cut-off events. [2024-06-20 16:50:01,513 INFO L125 PetriNetUnfolderBase]: For 863824/863826 co-relation queries the response was YES. [2024-06-20 16:50:01,603 INFO L83 FinitePrefix]: Finished finitePrefix Result has 86386 conditions, 11648 events. 7282/11648 cut-off events. For 863824/863826 co-relation queries the response was YES. Maximal size of possible extension queue 551. Compared 79683 event pairs, 3087 based on Foata normal form. 8/11655 useless extension candidates. Maximal degree in co-relation 86246. Up to 11199 conditions per place. [2024-06-20 16:50:01,638 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 359 selfloop transitions, 80 changer transitions 3/446 dead transitions. [2024-06-20 16:50:01,638 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 298 places, 446 transitions, 8136 flow [2024-06-20 16:50:01,639 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 16:50:01,639 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 16:50:01,639 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 167 transitions. [2024-06-20 16:50:01,639 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3976190476190476 [2024-06-20 16:50:01,639 INFO L175 Difference]: Start difference. First operand has 289 places, 397 transitions, 7022 flow. Second operand 10 states and 167 transitions. [2024-06-20 16:50:01,640 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 298 places, 446 transitions, 8136 flow [2024-06-20 16:50:03,163 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 291 places, 446 transitions, 7833 flow, removed 59 selfloop flow, removed 7 redundant places. [2024-06-20 16:50:03,169 INFO L231 Difference]: Finished difference. Result has 293 places, 406 transitions, 7012 flow [2024-06-20 16:50:03,169 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6728, PETRI_DIFFERENCE_MINUEND_PLACES=282, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=397, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=71, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=320, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=7012, PETRI_PLACES=293, PETRI_TRANSITIONS=406} [2024-06-20 16:50:03,169 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 250 predicate places. [2024-06-20 16:50:03,171 INFO L495 AbstractCegarLoop]: Abstraction has has 293 places, 406 transitions, 7012 flow [2024-06-20 16:50:03,172 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:50:03,172 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:50:03,172 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:50:03,172 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71 [2024-06-20 16:50:03,172 INFO L420 AbstractCegarLoop]: === Iteration 73 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:50:03,172 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:50:03,172 INFO L85 PathProgramCache]: Analyzing trace with hash 119702115, now seen corresponding path program 2 times [2024-06-20 16:50:03,173 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:50:03,173 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [601667454] [2024-06-20 16:50:03,173 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:50:03,173 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:50:03,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:50:06,688 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:50:06,689 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:50:06,689 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [601667454] [2024-06-20 16:50:06,689 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [601667454] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:50:06,689 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:50:06,689 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 16:50:06,689 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [948308294] [2024-06-20 16:50:06,690 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:50:06,692 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 16:50:06,693 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:50:06,693 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 16:50:06,693 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-20 16:50:06,758 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-20 16:50:06,758 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 293 places, 406 transitions, 7012 flow. Second operand has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:50:06,759 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:50:06,759 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-20 16:50:06,759 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:50:10,243 INFO L124 PetriNetUnfolderBase]: 7450/11890 cut-off events. [2024-06-20 16:50:10,243 INFO L125 PetriNetUnfolderBase]: For 906542/906544 co-relation queries the response was YES. [2024-06-20 16:50:10,383 INFO L83 FinitePrefix]: Finished finitePrefix Result has 89116 conditions, 11890 events. 7450/11890 cut-off events. For 906542/906544 co-relation queries the response was YES. Maximal size of possible extension queue 556. Compared 81324 event pairs, 2991 based on Foata normal form. 4/11893 useless extension candidates. Maximal degree in co-relation 88973. Up to 11305 conditions per place. [2024-06-20 16:50:10,430 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 356 selfloop transitions, 107 changer transitions 1/468 dead transitions. [2024-06-20 16:50:10,430 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 302 places, 468 transitions, 8561 flow [2024-06-20 16:50:10,431 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 16:50:10,431 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 16:50:10,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 166 transitions. [2024-06-20 16:50:10,432 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3952380952380952 [2024-06-20 16:50:10,432 INFO L175 Difference]: Start difference. First operand has 293 places, 406 transitions, 7012 flow. Second operand 10 states and 166 transitions. [2024-06-20 16:50:10,432 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 302 places, 468 transitions, 8561 flow [2024-06-20 16:50:12,198 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 294 places, 468 transitions, 8303 flow, removed 6 selfloop flow, removed 8 redundant places. [2024-06-20 16:50:12,205 INFO L231 Difference]: Finished difference. Result has 297 places, 431 transitions, 7434 flow [2024-06-20 16:50:12,205 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6775, PETRI_DIFFERENCE_MINUEND_PLACES=285, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=406, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=84, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=308, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=7434, PETRI_PLACES=297, PETRI_TRANSITIONS=431} [2024-06-20 16:50:12,205 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 254 predicate places. [2024-06-20 16:50:12,205 INFO L495 AbstractCegarLoop]: Abstraction has has 297 places, 431 transitions, 7434 flow [2024-06-20 16:50:12,206 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:50:12,206 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:50:12,206 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:50:12,206 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72 [2024-06-20 16:50:12,206 INFO L420 AbstractCegarLoop]: === Iteration 74 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:50:12,207 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:50:12,207 INFO L85 PathProgramCache]: Analyzing trace with hash 861580969, now seen corresponding path program 3 times [2024-06-20 16:50:12,207 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:50:12,207 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2102915160] [2024-06-20 16:50:12,207 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:50:12,207 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:50:12,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:50:15,821 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:50:15,822 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:50:15,822 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2102915160] [2024-06-20 16:50:15,822 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2102915160] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:50:15,822 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:50:15,822 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 16:50:15,822 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1738921334] [2024-06-20 16:50:15,822 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:50:15,823 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 16:50:15,823 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:50:15,823 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 16:50:15,823 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-20 16:50:15,864 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-20 16:50:15,865 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 297 places, 431 transitions, 7434 flow. Second operand has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:50:15,865 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:50:15,865 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-20 16:50:15,865 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:50:19,575 INFO L124 PetriNetUnfolderBase]: 7420/11850 cut-off events. [2024-06-20 16:50:19,576 INFO L125 PetriNetUnfolderBase]: For 927919/927921 co-relation queries the response was YES. [2024-06-20 16:50:19,696 INFO L83 FinitePrefix]: Finished finitePrefix Result has 89121 conditions, 11850 events. 7420/11850 cut-off events. For 927919/927921 co-relation queries the response was YES. Maximal size of possible extension queue 553. Compared 80931 event pairs, 3074 based on Foata normal form. 8/11857 useless extension candidates. Maximal degree in co-relation 88976. Up to 11286 conditions per place. [2024-06-20 16:50:19,737 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 360 selfloop transitions, 103 changer transitions 2/469 dead transitions. [2024-06-20 16:50:19,738 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 307 places, 469 transitions, 8590 flow [2024-06-20 16:50:19,738 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-20 16:50:19,738 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-20 16:50:19,739 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 180 transitions. [2024-06-20 16:50:19,739 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38961038961038963 [2024-06-20 16:50:19,739 INFO L175 Difference]: Start difference. First operand has 297 places, 431 transitions, 7434 flow. Second operand 11 states and 180 transitions. [2024-06-20 16:50:19,739 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 307 places, 469 transitions, 8590 flow [2024-06-20 16:50:21,486 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 304 places, 469 transitions, 8499 flow, removed 21 selfloop flow, removed 3 redundant places. [2024-06-20 16:50:21,492 INFO L231 Difference]: Finished difference. Result has 305 places, 429 transitions, 7523 flow [2024-06-20 16:50:21,492 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7343, PETRI_DIFFERENCE_MINUEND_PLACES=294, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=431, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=103, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=328, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=7523, PETRI_PLACES=305, PETRI_TRANSITIONS=429} [2024-06-20 16:50:21,493 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 262 predicate places. [2024-06-20 16:50:21,493 INFO L495 AbstractCegarLoop]: Abstraction has has 305 places, 429 transitions, 7523 flow [2024-06-20 16:50:21,493 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:50:21,493 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:50:21,493 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:50:21,493 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73 [2024-06-20 16:50:21,493 INFO L420 AbstractCegarLoop]: === Iteration 75 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:50:21,494 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:50:21,494 INFO L85 PathProgramCache]: Analyzing trace with hash 1300647817, now seen corresponding path program 4 times [2024-06-20 16:50:21,494 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:50:21,494 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1128330345] [2024-06-20 16:50:21,494 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:50:21,494 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:50:21,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:50:25,497 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:50:25,497 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:50:25,498 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1128330345] [2024-06-20 16:50:25,498 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1128330345] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:50:25,498 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:50:25,498 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 16:50:25,498 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1584748086] [2024-06-20 16:50:25,498 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:50:25,498 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 16:50:25,498 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:50:25,499 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 16:50:25,499 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-20 16:50:25,535 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-20 16:50:25,535 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 305 places, 429 transitions, 7523 flow. Second operand has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:50:25,535 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:50:25,535 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-20 16:50:25,536 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:50:29,132 INFO L124 PetriNetUnfolderBase]: 7432/11872 cut-off events. [2024-06-20 16:50:29,133 INFO L125 PetriNetUnfolderBase]: For 962028/962028 co-relation queries the response was YES. [2024-06-20 16:50:29,235 INFO L83 FinitePrefix]: Finished finitePrefix Result has 89811 conditions, 11872 events. 7432/11872 cut-off events. For 962028/962028 co-relation queries the response was YES. Maximal size of possible extension queue 554. Compared 81157 event pairs, 3113 based on Foata normal form. 10/11881 useless extension candidates. Maximal degree in co-relation 89664. Up to 11531 conditions per place. [2024-06-20 16:50:29,270 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 418 selfloop transitions, 42 changer transitions 0/464 dead transitions. [2024-06-20 16:50:29,270 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 315 places, 464 transitions, 8574 flow [2024-06-20 16:50:29,271 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-20 16:50:29,271 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-20 16:50:29,271 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 164 transitions. [2024-06-20 16:50:29,271 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.354978354978355 [2024-06-20 16:50:29,272 INFO L175 Difference]: Start difference. First operand has 305 places, 429 transitions, 7523 flow. Second operand 11 states and 164 transitions. [2024-06-20 16:50:29,272 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 315 places, 464 transitions, 8574 flow [2024-06-20 16:50:30,892 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 308 places, 464 transitions, 8381 flow, removed 9 selfloop flow, removed 7 redundant places. [2024-06-20 16:50:30,898 INFO L231 Difference]: Finished difference. Result has 309 places, 430 transitions, 7434 flow [2024-06-20 16:50:30,899 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7330, PETRI_DIFFERENCE_MINUEND_PLACES=298, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=429, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=387, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=7434, PETRI_PLACES=309, PETRI_TRANSITIONS=430} [2024-06-20 16:50:30,899 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 266 predicate places. [2024-06-20 16:50:30,899 INFO L495 AbstractCegarLoop]: Abstraction has has 309 places, 430 transitions, 7434 flow [2024-06-20 16:50:30,899 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:50:30,899 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:50:30,899 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:50:30,899 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74 [2024-06-20 16:50:30,900 INFO L420 AbstractCegarLoop]: === Iteration 76 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:50:30,900 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:50:30,900 INFO L85 PathProgramCache]: Analyzing trace with hash -429759453, now seen corresponding path program 5 times [2024-06-20 16:50:30,900 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:50:30,900 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [701103583] [2024-06-20 16:50:30,900 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:50:30,900 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:50:30,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:50:34,483 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:50:34,483 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:50:34,483 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [701103583] [2024-06-20 16:50:34,483 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [701103583] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:50:34,483 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:50:34,484 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 16:50:34,484 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1152071419] [2024-06-20 16:50:34,484 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:50:34,484 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 16:50:34,484 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:50:34,484 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 16:50:34,485 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-20 16:50:34,504 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-20 16:50:34,504 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 309 places, 430 transitions, 7434 flow. Second operand has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:50:34,504 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:50:34,504 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-20 16:50:34,504 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:50:37,880 INFO L124 PetriNetUnfolderBase]: 7527/12025 cut-off events. [2024-06-20 16:50:37,880 INFO L125 PetriNetUnfolderBase]: For 1006271/1006271 co-relation queries the response was YES. [2024-06-20 16:50:38,023 INFO L83 FinitePrefix]: Finished finitePrefix Result has 91434 conditions, 12025 events. 7527/12025 cut-off events. For 1006271/1006271 co-relation queries the response was YES. Maximal size of possible extension queue 564. Compared 82370 event pairs, 3136 based on Foata normal form. 8/12032 useless extension candidates. Maximal degree in co-relation 91287. Up to 11573 conditions per place. [2024-06-20 16:50:38,067 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 422 selfloop transitions, 46 changer transitions 0/472 dead transitions. [2024-06-20 16:50:38,067 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 319 places, 472 transitions, 8698 flow [2024-06-20 16:50:38,068 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-20 16:50:38,068 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-20 16:50:38,068 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 167 transitions. [2024-06-20 16:50:38,069 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36147186147186144 [2024-06-20 16:50:38,069 INFO L175 Difference]: Start difference. First operand has 309 places, 430 transitions, 7434 flow. Second operand 11 states and 167 transitions. [2024-06-20 16:50:38,069 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 319 places, 472 transitions, 8698 flow [2024-06-20 16:50:40,293 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 312 places, 472 transitions, 8634 flow, removed 3 selfloop flow, removed 7 redundant places. [2024-06-20 16:50:40,299 INFO L231 Difference]: Finished difference. Result has 314 places, 434 transitions, 7537 flow [2024-06-20 16:50:40,300 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7370, PETRI_DIFFERENCE_MINUEND_PLACES=302, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=430, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=385, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=7537, PETRI_PLACES=314, PETRI_TRANSITIONS=434} [2024-06-20 16:50:40,300 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 271 predicate places. [2024-06-20 16:50:40,300 INFO L495 AbstractCegarLoop]: Abstraction has has 314 places, 434 transitions, 7537 flow [2024-06-20 16:50:40,300 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:50:40,300 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:50:40,301 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:50:40,301 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75 [2024-06-20 16:50:40,302 INFO L420 AbstractCegarLoop]: === Iteration 77 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:50:40,302 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:50:40,303 INFO L85 PathProgramCache]: Analyzing trace with hash 1573466911, now seen corresponding path program 6 times [2024-06-20 16:50:40,303 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:50:40,303 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1371879131] [2024-06-20 16:50:40,303 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:50:40,303 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:50:40,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:50:44,529 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:50:44,529 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:50:44,530 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1371879131] [2024-06-20 16:50:44,530 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1371879131] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:50:44,530 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:50:44,530 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 16:50:44,530 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1768326400] [2024-06-20 16:50:44,530 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:50:44,530 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 16:50:44,531 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:50:44,531 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 16:50:44,531 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-20 16:50:44,551 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-20 16:50:44,551 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 314 places, 434 transitions, 7537 flow. Second operand has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:50:44,551 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:50:44,551 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-20 16:50:44,552 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:50:47,990 INFO L124 PetriNetUnfolderBase]: 7504/11992 cut-off events. [2024-06-20 16:50:47,990 INFO L125 PetriNetUnfolderBase]: For 1016459/1016459 co-relation queries the response was YES. [2024-06-20 16:50:48,097 INFO L83 FinitePrefix]: Finished finitePrefix Result has 91136 conditions, 11992 events. 7504/11992 cut-off events. For 1016459/1016459 co-relation queries the response was YES. Maximal size of possible extension queue 561. Compared 82134 event pairs, 3125 based on Foata normal form. 10/12001 useless extension candidates. Maximal degree in co-relation 90987. Up to 11643 conditions per place. [2024-06-20 16:50:48,135 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 421 selfloop transitions, 40 changer transitions 0/465 dead transitions. [2024-06-20 16:50:48,135 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 322 places, 465 transitions, 8571 flow [2024-06-20 16:50:48,136 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 16:50:48,136 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 16:50:48,136 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 141 transitions. [2024-06-20 16:50:48,136 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.373015873015873 [2024-06-20 16:50:48,136 INFO L175 Difference]: Start difference. First operand has 314 places, 434 transitions, 7537 flow. Second operand 9 states and 141 transitions. [2024-06-20 16:50:48,136 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 322 places, 465 transitions, 8571 flow [2024-06-20 16:50:50,182 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 315 places, 465 transitions, 8500 flow, removed 8 selfloop flow, removed 7 redundant places. [2024-06-20 16:50:50,188 INFO L231 Difference]: Finished difference. Result has 316 places, 434 transitions, 7551 flow [2024-06-20 16:50:50,188 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7466, PETRI_DIFFERENCE_MINUEND_PLACES=307, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=434, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=394, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7551, PETRI_PLACES=316, PETRI_TRANSITIONS=434} [2024-06-20 16:50:50,189 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 273 predicate places. [2024-06-20 16:50:50,189 INFO L495 AbstractCegarLoop]: Abstraction has has 316 places, 434 transitions, 7551 flow [2024-06-20 16:50:50,189 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:50:50,189 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:50:50,189 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:50:50,189 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76 [2024-06-20 16:50:50,189 INFO L420 AbstractCegarLoop]: === Iteration 78 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:50:50,190 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:50:50,190 INFO L85 PathProgramCache]: Analyzing trace with hash 104010683, now seen corresponding path program 2 times [2024-06-20 16:50:50,190 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:50:50,190 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [125181445] [2024-06-20 16:50:50,190 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:50:50,190 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:50:50,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:50:53,923 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:50:53,923 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:50:53,923 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [125181445] [2024-06-20 16:50:53,923 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [125181445] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:50:53,923 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:50:53,923 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 16:50:53,924 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [248224718] [2024-06-20 16:50:53,924 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:50:53,924 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 16:50:53,924 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:50:53,924 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 16:50:53,925 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-20 16:50:53,940 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-20 16:50:53,940 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 316 places, 434 transitions, 7551 flow. Second operand has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:50:53,940 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:50:53,940 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-20 16:50:53,940 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:50:58,123 INFO L124 PetriNetUnfolderBase]: 7664/12201 cut-off events. [2024-06-20 16:50:58,124 INFO L125 PetriNetUnfolderBase]: For 1064849/1064851 co-relation queries the response was YES. [2024-06-20 16:50:58,238 INFO L83 FinitePrefix]: Finished finitePrefix Result has 94373 conditions, 12201 events. 7664/12201 cut-off events. For 1064849/1064851 co-relation queries the response was YES. Maximal size of possible extension queue 567. Compared 83283 event pairs, 2886 based on Foata normal form. 4/12204 useless extension candidates. Maximal degree in co-relation 94222. Up to 11205 conditions per place. [2024-06-20 16:50:58,277 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 362 selfloop transitions, 156 changer transitions 0/522 dead transitions. [2024-06-20 16:50:58,277 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 328 places, 522 transitions, 9912 flow [2024-06-20 16:50:58,278 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-06-20 16:50:58,278 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-06-20 16:50:58,278 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 230 transitions. [2024-06-20 16:50:58,278 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42124542124542125 [2024-06-20 16:50:58,279 INFO L175 Difference]: Start difference. First operand has 316 places, 434 transitions, 7551 flow. Second operand 13 states and 230 transitions. [2024-06-20 16:50:58,279 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 328 places, 522 transitions, 9912 flow [2024-06-20 16:51:00,632 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 321 places, 522 transitions, 9831 flow, removed 2 selfloop flow, removed 7 redundant places. [2024-06-20 16:51:00,639 INFO L231 Difference]: Finished difference. Result has 324 places, 454 transitions, 8322 flow [2024-06-20 16:51:00,639 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7470, PETRI_DIFFERENCE_MINUEND_PLACES=309, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=434, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=139, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=286, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=8322, PETRI_PLACES=324, PETRI_TRANSITIONS=454} [2024-06-20 16:51:00,640 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 281 predicate places. [2024-06-20 16:51:00,640 INFO L495 AbstractCegarLoop]: Abstraction has has 324 places, 454 transitions, 8322 flow [2024-06-20 16:51:00,640 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:51:00,640 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:51:00,640 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:51:00,640 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77 [2024-06-20 16:51:00,640 INFO L420 AbstractCegarLoop]: === Iteration 79 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:51:00,641 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:51:00,641 INFO L85 PathProgramCache]: Analyzing trace with hash -1625771627, now seen corresponding path program 3 times [2024-06-20 16:51:00,641 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:51:00,641 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [993790447] [2024-06-20 16:51:00,641 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:51:00,641 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:51:00,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:51:04,182 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:51:04,183 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:51:04,183 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [993790447] [2024-06-20 16:51:04,183 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [993790447] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:51:04,183 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:51:04,183 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 16:51:04,183 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2115426902] [2024-06-20 16:51:04,183 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:51:04,184 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 16:51:04,184 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:51:04,184 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 16:51:04,184 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-20 16:51:04,201 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-20 16:51:04,201 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 324 places, 454 transitions, 8322 flow. Second operand has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:51:04,202 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:51:04,202 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-20 16:51:04,202 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:51:08,672 INFO L124 PetriNetUnfolderBase]: 7658/12181 cut-off events. [2024-06-20 16:51:08,672 INFO L125 PetriNetUnfolderBase]: For 1094207/1094209 co-relation queries the response was YES. [2024-06-20 16:51:08,800 INFO L83 FinitePrefix]: Finished finitePrefix Result has 95588 conditions, 12181 events. 7658/12181 cut-off events. For 1094207/1094209 co-relation queries the response was YES. Maximal size of possible extension queue 567. Compared 82962 event pairs, 2932 based on Foata normal form. 4/12184 useless extension candidates. Maximal degree in co-relation 95434. Up to 11202 conditions per place. [2024-06-20 16:51:08,844 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 357 selfloop transitions, 158 changer transitions 0/519 dead transitions. [2024-06-20 16:51:08,844 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 337 places, 519 transitions, 10089 flow [2024-06-20 16:51:08,845 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-06-20 16:51:08,845 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2024-06-20 16:51:08,845 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 236 transitions. [2024-06-20 16:51:08,845 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4013605442176871 [2024-06-20 16:51:08,845 INFO L175 Difference]: Start difference. First operand has 324 places, 454 transitions, 8322 flow. Second operand 14 states and 236 transitions. [2024-06-20 16:51:08,845 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 337 places, 519 transitions, 10089 flow [2024-06-20 16:51:11,658 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 330 places, 519 transitions, 9787 flow, removed 81 selfloop flow, removed 7 redundant places. [2024-06-20 16:51:11,665 INFO L231 Difference]: Finished difference. Result has 331 places, 454 transitions, 8342 flow [2024-06-20 16:51:11,666 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8020, PETRI_DIFFERENCE_MINUEND_PLACES=317, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=454, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=158, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=296, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=8342, PETRI_PLACES=331, PETRI_TRANSITIONS=454} [2024-06-20 16:51:11,666 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 288 predicate places. [2024-06-20 16:51:11,666 INFO L495 AbstractCegarLoop]: Abstraction has has 331 places, 454 transitions, 8342 flow [2024-06-20 16:51:11,666 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:51:11,666 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:51:11,667 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:51:11,667 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78 [2024-06-20 16:51:11,667 INFO L420 AbstractCegarLoop]: === Iteration 80 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:51:11,667 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:51:11,667 INFO L85 PathProgramCache]: Analyzing trace with hash 98648303, now seen corresponding path program 4 times [2024-06-20 16:51:11,667 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:51:11,667 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1092794061] [2024-06-20 16:51:11,667 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:51:11,668 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:51:11,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:51:15,085 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:51:15,086 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:51:15,086 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1092794061] [2024-06-20 16:51:15,086 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1092794061] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:51:15,086 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:51:15,086 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 16:51:15,086 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1099179519] [2024-06-20 16:51:15,086 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:51:15,086 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 16:51:15,087 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:51:15,087 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 16:51:15,087 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-20 16:51:15,104 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-20 16:51:15,104 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 331 places, 454 transitions, 8342 flow. Second operand has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:51:15,104 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:51:15,104 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-20 16:51:15,104 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:51:19,047 INFO L124 PetriNetUnfolderBase]: 7652/12179 cut-off events. [2024-06-20 16:51:19,047 INFO L125 PetriNetUnfolderBase]: For 1115507/1115509 co-relation queries the response was YES. [2024-06-20 16:51:19,171 INFO L83 FinitePrefix]: Finished finitePrefix Result has 96140 conditions, 12179 events. 7652/12179 cut-off events. For 1115507/1115509 co-relation queries the response was YES. Maximal size of possible extension queue 567. Compared 83044 event pairs, 2951 based on Foata normal form. 4/12182 useless extension candidates. Maximal degree in co-relation 95984. Up to 11199 conditions per place. [2024-06-20 16:51:19,213 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 359 selfloop transitions, 149 changer transitions 0/512 dead transitions. [2024-06-20 16:51:19,213 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 341 places, 512 transitions, 9949 flow [2024-06-20 16:51:19,214 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-20 16:51:19,214 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-20 16:51:19,214 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 200 transitions. [2024-06-20 16:51:19,214 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4329004329004329 [2024-06-20 16:51:19,214 INFO L175 Difference]: Start difference. First operand has 331 places, 454 transitions, 8342 flow. Second operand 11 states and 200 transitions. [2024-06-20 16:51:19,214 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 341 places, 512 transitions, 9949 flow [2024-06-20 16:51:21,998 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 331 places, 512 transitions, 9606 flow, removed 36 selfloop flow, removed 10 redundant places. [2024-06-20 16:51:22,006 INFO L231 Difference]: Finished difference. Result has 332 places, 454 transitions, 8303 flow [2024-06-20 16:51:22,006 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7999, PETRI_DIFFERENCE_MINUEND_PLACES=321, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=454, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=149, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=305, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=8303, PETRI_PLACES=332, PETRI_TRANSITIONS=454} [2024-06-20 16:51:22,007 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 289 predicate places. [2024-06-20 16:51:22,007 INFO L495 AbstractCegarLoop]: Abstraction has has 332 places, 454 transitions, 8303 flow [2024-06-20 16:51:22,007 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:51:22,007 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:51:22,007 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:51:22,007 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79 [2024-06-20 16:51:22,007 INFO L420 AbstractCegarLoop]: === Iteration 81 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:51:22,008 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:51:22,008 INFO L85 PathProgramCache]: Analyzing trace with hash 98768459, now seen corresponding path program 4 times [2024-06-20 16:51:22,008 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:51:22,008 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [105389472] [2024-06-20 16:51:22,008 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:51:22,008 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:51:22,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:51:25,860 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:51:25,860 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:51:25,860 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [105389472] [2024-06-20 16:51:25,861 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [105389472] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:51:25,861 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:51:25,861 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 16:51:25,861 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1655280701] [2024-06-20 16:51:25,861 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:51:25,861 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 16:51:25,861 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:51:25,862 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 16:51:25,862 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-20 16:51:25,872 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-20 16:51:25,872 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 332 places, 454 transitions, 8303 flow. Second operand has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:51:25,872 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:51:25,872 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-20 16:51:25,872 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:51:29,532 INFO L124 PetriNetUnfolderBase]: 7626/12155 cut-off events. [2024-06-20 16:51:29,532 INFO L125 PetriNetUnfolderBase]: For 1137947/1137949 co-relation queries the response was YES. [2024-06-20 16:51:29,654 INFO L83 FinitePrefix]: Finished finitePrefix Result has 95695 conditions, 12155 events. 7626/12155 cut-off events. For 1137947/1137949 co-relation queries the response was YES. Maximal size of possible extension queue 562. Compared 82961 event pairs, 3139 based on Foata normal form. 8/12162 useless extension candidates. Maximal degree in co-relation 95538. Up to 11784 conditions per place. [2024-06-20 16:51:29,692 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 423 selfloop transitions, 61 changer transitions 3/491 dead transitions. [2024-06-20 16:51:29,693 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 341 places, 491 transitions, 9394 flow [2024-06-20 16:51:29,693 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 16:51:29,693 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 16:51:29,694 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 162 transitions. [2024-06-20 16:51:29,694 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38571428571428573 [2024-06-20 16:51:29,694 INFO L175 Difference]: Start difference. First operand has 332 places, 454 transitions, 8303 flow. Second operand 10 states and 162 transitions. [2024-06-20 16:51:29,694 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 341 places, 491 transitions, 9394 flow [2024-06-20 16:51:32,390 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 330 places, 491 transitions, 9060 flow, removed 0 selfloop flow, removed 11 redundant places. [2024-06-20 16:51:32,397 INFO L231 Difference]: Finished difference. Result has 331 places, 452 transitions, 8055 flow [2024-06-20 16:51:32,398 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7969, PETRI_DIFFERENCE_MINUEND_PLACES=321, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=454, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=61, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=393, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=8055, PETRI_PLACES=331, PETRI_TRANSITIONS=452} [2024-06-20 16:51:32,398 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 288 predicate places. [2024-06-20 16:51:32,398 INFO L495 AbstractCegarLoop]: Abstraction has has 331 places, 452 transitions, 8055 flow [2024-06-20 16:51:32,398 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:51:32,398 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:51:32,398 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:51:32,399 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80 [2024-06-20 16:51:32,399 INFO L420 AbstractCegarLoop]: === Iteration 82 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:51:32,399 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:51:32,399 INFO L85 PathProgramCache]: Analyzing trace with hash 104309585, now seen corresponding path program 1 times [2024-06-20 16:51:32,399 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:51:32,399 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1633013384] [2024-06-20 16:51:32,399 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:51:32,400 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:51:32,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:51:35,980 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:51:35,980 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:51:35,980 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1633013384] [2024-06-20 16:51:35,980 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1633013384] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:51:35,981 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:51:35,981 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 16:51:35,981 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2035556189] [2024-06-20 16:51:35,981 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:51:35,981 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 16:51:35,985 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:51:35,985 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 16:51:35,985 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-20 16:51:35,996 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-20 16:51:35,996 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 331 places, 452 transitions, 8055 flow. Second operand has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:51:35,997 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:51:35,997 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-20 16:51:35,997 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:51:39,605 INFO L124 PetriNetUnfolderBase]: 7590/12075 cut-off events. [2024-06-20 16:51:39,605 INFO L125 PetriNetUnfolderBase]: For 1146533/1146535 co-relation queries the response was YES. [2024-06-20 16:51:40,044 INFO L83 FinitePrefix]: Finished finitePrefix Result has 94818 conditions, 12075 events. 7590/12075 cut-off events. For 1146533/1146535 co-relation queries the response was YES. Maximal size of possible extension queue 552. Compared 82199 event pairs, 3083 based on Foata normal form. 6/12080 useless extension candidates. Maximal degree in co-relation 94660. Up to 11487 conditions per place. [2024-06-20 16:51:40,085 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 386 selfloop transitions, 109 changer transitions 0/499 dead transitions. [2024-06-20 16:51:40,085 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 341 places, 499 transitions, 9330 flow [2024-06-20 16:51:40,086 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-20 16:51:40,086 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-20 16:51:40,087 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 183 transitions. [2024-06-20 16:51:40,087 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3961038961038961 [2024-06-20 16:51:40,087 INFO L175 Difference]: Start difference. First operand has 331 places, 452 transitions, 8055 flow. Second operand 11 states and 183 transitions. [2024-06-20 16:51:40,087 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 341 places, 499 transitions, 9330 flow [2024-06-20 16:51:42,843 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 334 places, 499 transitions, 9173 flow, removed 14 selfloop flow, removed 7 redundant places. [2024-06-20 16:51:42,849 INFO L231 Difference]: Finished difference. Result has 335 places, 452 transitions, 8122 flow [2024-06-20 16:51:42,850 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7898, PETRI_DIFFERENCE_MINUEND_PLACES=324, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=452, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=109, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=343, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=8122, PETRI_PLACES=335, PETRI_TRANSITIONS=452} [2024-06-20 16:51:42,850 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 292 predicate places. [2024-06-20 16:51:42,850 INFO L495 AbstractCegarLoop]: Abstraction has has 335 places, 452 transitions, 8122 flow [2024-06-20 16:51:42,850 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:51:42,850 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:51:42,851 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:51:42,851 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81 [2024-06-20 16:51:42,851 INFO L420 AbstractCegarLoop]: === Iteration 83 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:51:42,852 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:51:42,852 INFO L85 PathProgramCache]: Analyzing trace with hash -1622057951, now seen corresponding path program 5 times [2024-06-20 16:51:42,852 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:51:42,852 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1003384821] [2024-06-20 16:51:42,852 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:51:42,852 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:51:42,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:51:46,784 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:51:46,784 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:51:46,785 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1003384821] [2024-06-20 16:51:46,785 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1003384821] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:51:46,785 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:51:46,785 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 16:51:46,785 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1845177284] [2024-06-20 16:51:46,785 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:51:46,785 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 16:51:46,786 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:51:46,786 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 16:51:46,786 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-20 16:51:46,799 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-20 16:51:46,799 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 335 places, 452 transitions, 8122 flow. Second operand has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:51:46,799 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:51:46,800 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-20 16:51:46,800 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:51:50,867 INFO L124 PetriNetUnfolderBase]: 7803/12426 cut-off events. [2024-06-20 16:51:50,867 INFO L125 PetriNetUnfolderBase]: For 1204467/1204469 co-relation queries the response was YES. [2024-06-20 16:51:50,999 INFO L83 FinitePrefix]: Finished finitePrefix Result has 99186 conditions, 12426 events. 7803/12426 cut-off events. For 1204467/1204469 co-relation queries the response was YES. Maximal size of possible extension queue 560. Compared 84899 event pairs, 3121 based on Foata normal form. 8/12433 useless extension candidates. Maximal degree in co-relation 99027. Up to 11869 conditions per place. [2024-06-20 16:51:51,041 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 432 selfloop transitions, 94 changer transitions 1/531 dead transitions. [2024-06-20 16:51:51,041 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 347 places, 531 transitions, 10405 flow [2024-06-20 16:51:51,042 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-06-20 16:51:51,042 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-06-20 16:51:51,042 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 201 transitions. [2024-06-20 16:51:51,042 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36813186813186816 [2024-06-20 16:51:51,042 INFO L175 Difference]: Start difference. First operand has 335 places, 452 transitions, 8122 flow. Second operand 13 states and 201 transitions. [2024-06-20 16:51:51,042 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 347 places, 531 transitions, 10405 flow [2024-06-20 16:51:54,341 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 337 places, 531 transitions, 10108 flow, removed 5 selfloop flow, removed 10 redundant places. [2024-06-20 16:51:54,349 INFO L231 Difference]: Finished difference. Result has 341 places, 486 transitions, 9005 flow [2024-06-20 16:51:54,349 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7871, PETRI_DIFFERENCE_MINUEND_PLACES=325, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=452, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=63, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=370, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=9005, PETRI_PLACES=341, PETRI_TRANSITIONS=486} [2024-06-20 16:51:54,350 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 298 predicate places. [2024-06-20 16:51:54,350 INFO L495 AbstractCegarLoop]: Abstraction has has 341 places, 486 transitions, 9005 flow [2024-06-20 16:51:54,350 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:51:54,350 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:51:54,350 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:51:54,350 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82 [2024-06-20 16:51:54,350 INFO L420 AbstractCegarLoop]: === Iteration 84 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:51:54,351 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:51:54,351 INFO L85 PathProgramCache]: Analyzing trace with hash -421859667, now seen corresponding path program 6 times [2024-06-20 16:51:54,351 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:51:54,351 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1737683880] [2024-06-20 16:51:54,351 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:51:54,351 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:51:54,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:51:57,873 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:51:57,873 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:51:57,873 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1737683880] [2024-06-20 16:51:57,874 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1737683880] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:51:57,874 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:51:57,874 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 16:51:57,874 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [514195159] [2024-06-20 16:51:57,874 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:51:57,874 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 16:51:57,874 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:51:57,875 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 16:51:57,875 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-20 16:51:57,893 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-20 16:51:57,893 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 341 places, 486 transitions, 9005 flow. Second operand has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:51:57,894 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:51:57,894 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-20 16:51:57,894 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:52:01,892 INFO L124 PetriNetUnfolderBase]: 7773/12386 cut-off events. [2024-06-20 16:52:01,893 INFO L125 PetriNetUnfolderBase]: For 1216470/1216472 co-relation queries the response was YES. [2024-06-20 16:52:02,395 INFO L83 FinitePrefix]: Finished finitePrefix Result has 98884 conditions, 12386 events. 7773/12386 cut-off events. For 1216470/1216472 co-relation queries the response was YES. Maximal size of possible extension queue 556. Compared 84656 event pairs, 3114 based on Foata normal form. 8/12393 useless extension candidates. Maximal degree in co-relation 98721. Up to 11850 conditions per place. [2024-06-20 16:52:02,432 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 427 selfloop transitions, 94 changer transitions 3/528 dead transitions. [2024-06-20 16:52:02,433 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 352 places, 528 transitions, 10230 flow [2024-06-20 16:52:02,433 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-20 16:52:02,433 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-20 16:52:02,434 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 188 transitions. [2024-06-20 16:52:02,434 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.373015873015873 [2024-06-20 16:52:02,434 INFO L175 Difference]: Start difference. First operand has 341 places, 486 transitions, 9005 flow. Second operand 12 states and 188 transitions. [2024-06-20 16:52:02,434 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 352 places, 528 transitions, 10230 flow [2024-06-20 16:52:05,140 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 346 places, 528 transitions, 10123 flow, removed 14 selfloop flow, removed 6 redundant places. [2024-06-20 16:52:05,148 INFO L231 Difference]: Finished difference. Result has 348 places, 487 transitions, 9140 flow [2024-06-20 16:52:05,148 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8898, PETRI_DIFFERENCE_MINUEND_PLACES=335, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=486, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=92, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=392, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=9140, PETRI_PLACES=348, PETRI_TRANSITIONS=487} [2024-06-20 16:52:05,148 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 305 predicate places. [2024-06-20 16:52:05,149 INFO L495 AbstractCegarLoop]: Abstraction has has 348 places, 487 transitions, 9140 flow [2024-06-20 16:52:05,149 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:52:05,149 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:52:05,149 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:52:05,149 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83 [2024-06-20 16:52:05,149 INFO L420 AbstractCegarLoop]: === Iteration 85 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:52:05,149 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:52:05,150 INFO L85 PathProgramCache]: Analyzing trace with hash 1300413643, now seen corresponding path program 7 times [2024-06-20 16:52:05,150 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:52:05,150 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [799536202] [2024-06-20 16:52:05,150 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:52:05,150 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:52:05,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:52:09,277 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:52:09,277 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:52:09,277 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [799536202] [2024-06-20 16:52:09,277 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [799536202] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:52:09,277 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:52:09,278 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 16:52:09,278 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2028700123] [2024-06-20 16:52:09,278 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:52:09,278 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 16:52:09,278 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:52:09,278 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 16:52:09,279 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-20 16:52:09,296 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-20 16:52:09,296 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 348 places, 487 transitions, 9140 flow. Second operand has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:52:09,296 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:52:09,297 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-20 16:52:09,297 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:52:13,881 INFO L124 PetriNetUnfolderBase]: 8084/12850 cut-off events. [2024-06-20 16:52:13,881 INFO L125 PetriNetUnfolderBase]: For 1300858/1300860 co-relation queries the response was YES. [2024-06-20 16:52:14,024 INFO L83 FinitePrefix]: Finished finitePrefix Result has 104341 conditions, 12850 events. 8084/12850 cut-off events. For 1300858/1300860 co-relation queries the response was YES. Maximal size of possible extension queue 576. Compared 87936 event pairs, 3041 based on Foata normal form. 8/12857 useless extension candidates. Maximal degree in co-relation 104175. Up to 11618 conditions per place. [2024-06-20 16:52:14,070 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 361 selfloop transitions, 205 changer transitions 1/571 dead transitions. [2024-06-20 16:52:14,071 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 359 places, 571 transitions, 11739 flow [2024-06-20 16:52:14,071 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-20 16:52:14,072 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-20 16:52:14,072 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 193 transitions. [2024-06-20 16:52:14,072 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38293650793650796 [2024-06-20 16:52:14,072 INFO L175 Difference]: Start difference. First operand has 348 places, 487 transitions, 9140 flow. Second operand 12 states and 193 transitions. [2024-06-20 16:52:14,072 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 359 places, 571 transitions, 11739 flow [2024-06-20 16:52:17,492 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 351 places, 571 transitions, 11588 flow, removed 0 selfloop flow, removed 8 redundant places. [2024-06-20 16:52:17,500 INFO L231 Difference]: Finished difference. Result has 354 places, 526 transitions, 10320 flow [2024-06-20 16:52:17,501 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8995, PETRI_DIFFERENCE_MINUEND_PLACES=340, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=487, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=168, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=293, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=10320, PETRI_PLACES=354, PETRI_TRANSITIONS=526} [2024-06-20 16:52:17,501 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 311 predicate places. [2024-06-20 16:52:17,501 INFO L495 AbstractCegarLoop]: Abstraction has has 354 places, 526 transitions, 10320 flow [2024-06-20 16:52:17,501 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:52:17,502 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:52:17,502 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:52:17,502 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84 [2024-06-20 16:52:17,502 INFO L420 AbstractCegarLoop]: === Iteration 86 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:52:17,503 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:52:17,503 INFO L85 PathProgramCache]: Analyzing trace with hash 251924579, now seen corresponding path program 8 times [2024-06-20 16:52:17,503 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:52:17,503 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1112866567] [2024-06-20 16:52:17,503 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:52:17,503 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:52:17,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:52:21,961 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:52:21,961 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:52:21,961 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1112866567] [2024-06-20 16:52:21,961 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1112866567] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:52:21,962 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:52:21,962 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 16:52:21,962 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [287331072] [2024-06-20 16:52:21,962 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:52:21,963 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 16:52:21,963 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:52:21,964 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 16:52:21,965 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-20 16:52:21,991 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-20 16:52:21,992 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 354 places, 526 transitions, 10320 flow. Second operand has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:52:21,992 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:52:21,992 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-20 16:52:21,992 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:52:27,484 INFO L124 PetriNetUnfolderBase]: 8110/12868 cut-off events. [2024-06-20 16:52:27,484 INFO L125 PetriNetUnfolderBase]: For 1342839/1342841 co-relation queries the response was YES. [2024-06-20 16:52:27,640 INFO L83 FinitePrefix]: Finished finitePrefix Result has 106343 conditions, 12868 events. 8110/12868 cut-off events. For 1342839/1342841 co-relation queries the response was YES. Maximal size of possible extension queue 572. Compared 87786 event pairs, 3134 based on Foata normal form. 8/12875 useless extension candidates. Maximal degree in co-relation 106174. Up to 12182 conditions per place. [2024-06-20 16:52:27,795 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 449 selfloop transitions, 119 changer transitions 1/573 dead transitions. [2024-06-20 16:52:27,805 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 366 places, 573 transitions, 12034 flow [2024-06-20 16:52:27,805 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-06-20 16:52:27,806 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-06-20 16:52:27,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 201 transitions. [2024-06-20 16:52:27,806 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36813186813186816 [2024-06-20 16:52:27,806 INFO L175 Difference]: Start difference. First operand has 354 places, 526 transitions, 10320 flow. Second operand 13 states and 201 transitions. [2024-06-20 16:52:27,806 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 366 places, 573 transitions, 12034 flow [2024-06-20 16:52:31,435 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 361 places, 573 transitions, 11745 flow, removed 29 selfloop flow, removed 5 redundant places. [2024-06-20 16:52:31,444 INFO L231 Difference]: Finished difference. Result has 364 places, 532 transitions, 10452 flow [2024-06-20 16:52:31,444 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=10031, PETRI_DIFFERENCE_MINUEND_PLACES=349, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=526, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=113, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=410, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=10452, PETRI_PLACES=364, PETRI_TRANSITIONS=532} [2024-06-20 16:52:31,445 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 321 predicate places. [2024-06-20 16:52:31,445 INFO L495 AbstractCegarLoop]: Abstraction has has 364 places, 532 transitions, 10452 flow [2024-06-20 16:52:31,445 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:52:31,445 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:52:31,445 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:52:31,446 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85 [2024-06-20 16:52:31,446 INFO L420 AbstractCegarLoop]: === Iteration 87 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:52:31,446 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:52:31,446 INFO L85 PathProgramCache]: Analyzing trace with hash 1311375553, now seen corresponding path program 9 times [2024-06-20 16:52:31,446 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:52:31,446 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1733820935] [2024-06-20 16:52:31,447 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:52:31,447 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:52:31,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:52:35,231 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:52:35,231 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:52:35,231 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1733820935] [2024-06-20 16:52:35,232 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1733820935] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:52:35,232 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:52:35,232 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 16:52:35,232 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [449519291] [2024-06-20 16:52:35,232 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:52:35,232 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 16:52:35,232 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:52:35,233 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 16:52:35,233 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-20 16:52:35,257 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-20 16:52:35,259 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 364 places, 532 transitions, 10452 flow. Second operand has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:52:35,259 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:52:35,259 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-20 16:52:35,259 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:52:39,564 INFO L124 PetriNetUnfolderBase]: 8164/12974 cut-off events. [2024-06-20 16:52:39,565 INFO L125 PetriNetUnfolderBase]: For 1382803/1382805 co-relation queries the response was YES. [2024-06-20 16:52:39,873 INFO L83 FinitePrefix]: Finished finitePrefix Result has 107975 conditions, 12974 events. 8164/12974 cut-off events. For 1382803/1382805 co-relation queries the response was YES. Maximal size of possible extension queue 586. Compared 88930 event pairs, 3007 based on Foata normal form. 4/12977 useless extension candidates. Maximal degree in co-relation 107803. Up to 11679 conditions per place. [2024-06-20 16:52:39,911 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 352 selfloop transitions, 219 changer transitions 1/576 dead transitions. [2024-06-20 16:52:39,911 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 373 places, 576 transitions, 12200 flow [2024-06-20 16:52:39,912 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 16:52:39,912 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 16:52:39,912 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 165 transitions. [2024-06-20 16:52:39,913 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39285714285714285 [2024-06-20 16:52:39,913 INFO L175 Difference]: Start difference. First operand has 364 places, 532 transitions, 10452 flow. Second operand 10 states and 165 transitions. [2024-06-20 16:52:39,913 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 373 places, 576 transitions, 12200 flow [2024-06-20 16:52:43,513 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 366 places, 576 transitions, 11957 flow, removed 30 selfloop flow, removed 7 redundant places. [2024-06-20 16:52:43,522 INFO L231 Difference]: Finished difference. Result has 370 places, 543 transitions, 11056 flow [2024-06-20 16:52:43,522 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=10209, PETRI_DIFFERENCE_MINUEND_PLACES=357, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=532, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=209, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=319, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=11056, PETRI_PLACES=370, PETRI_TRANSITIONS=543} [2024-06-20 16:52:43,523 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 327 predicate places. [2024-06-20 16:52:43,523 INFO L495 AbstractCegarLoop]: Abstraction has has 370 places, 543 transitions, 11056 flow [2024-06-20 16:52:43,523 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:52:43,523 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:52:43,523 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:52:43,523 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86 [2024-06-20 16:52:43,523 INFO L420 AbstractCegarLoop]: === Iteration 88 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:52:43,527 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:52:43,527 INFO L85 PathProgramCache]: Analyzing trace with hash 1304132713, now seen corresponding path program 10 times [2024-06-20 16:52:43,528 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:52:43,528 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1006781511] [2024-06-20 16:52:43,528 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:52:43,528 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:52:43,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:52:47,328 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:52:47,329 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:52:47,329 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1006781511] [2024-06-20 16:52:47,329 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1006781511] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:52:47,329 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:52:47,329 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 16:52:47,329 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1784165593] [2024-06-20 16:52:47,330 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:52:47,330 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 16:52:47,330 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:52:47,330 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 16:52:47,330 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-20 16:52:47,363 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-20 16:52:47,364 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 370 places, 543 transitions, 11056 flow. Second operand has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:52:47,364 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:52:47,364 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-20 16:52:47,364 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand