./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/pthread-wmm/safe002_rmo.oepc.i --full-output --witness-type correctness_witness --witnessparser.only.consider.loop.invariants false --cacsl2boogietranslator.check.unreachability.of.reach_error.function false --validate ./goblint.2024-05-21_14-57-05.files/protection/safe002_rmo.oepc.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/safe002_rmo.oepc.i ./goblint.2024-05-21_14-57-05.files/protection/safe002_rmo.oepc.yml/witness.yml -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --traceabstraction.compute.hoare.annotation.of.negated.interpolant.automaton,.abstraction.and.cfg false --witnessparser.only.consider.loop.invariants false --cacsl2boogietranslator.check.unreachability.of.reach_error.function false --- Real Ultimate output --- This is Ultimate 0.2.4-tmp.fs.goblint-validation-76401ed-m [2024-06-20 16:47:45,105 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-06-20 16:47:45,174 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-06-20 16:47:45,179 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-06-20 16:47:45,180 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-06-20 16:47:45,201 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-06-20 16:47:45,202 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-06-20 16:47:45,203 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-06-20 16:47:45,203 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-06-20 16:47:45,207 INFO L153 SettingsManager]: * Use memory slicer=true [2024-06-20 16:47:45,207 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-06-20 16:47:45,208 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-06-20 16:47:45,209 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-06-20 16:47:45,209 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-06-20 16:47:45,210 INFO L153 SettingsManager]: * Use SBE=true [2024-06-20 16:47:45,210 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-06-20 16:47:45,210 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-06-20 16:47:45,210 INFO L153 SettingsManager]: * sizeof long=4 [2024-06-20 16:47:45,210 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-06-20 16:47:45,211 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-06-20 16:47:45,211 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-06-20 16:47:45,211 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-06-20 16:47:45,211 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-06-20 16:47:45,212 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-06-20 16:47:45,212 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-06-20 16:47:45,212 INFO L153 SettingsManager]: * sizeof long double=12 [2024-06-20 16:47:45,212 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-06-20 16:47:45,212 INFO L153 SettingsManager]: * Use constant arrays=true [2024-06-20 16:47:45,213 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-06-20 16:47:45,213 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-06-20 16:47:45,214 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-06-20 16:47:45,214 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-06-20 16:47:45,215 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-20 16:47:45,215 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-06-20 16:47:45,215 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-06-20 16:47:45,215 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-06-20 16:47:45,215 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-06-20 16:47:45,215 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-06-20 16:47:45,216 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-06-20 16:47:45,216 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-06-20 16:47:45,216 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-06-20 16:47:45,216 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-06-20 16:47:45,216 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-06-20 16:47:45,217 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check unreachability of reach_error function -> false [2024-06-20 16:47:45,441 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-06-20 16:47:45,456 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-06-20 16:47:45,457 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-06-20 16:47:45,458 INFO L270 PluginConnector]: Initializing CDTParser... [2024-06-20 16:47:45,458 INFO L274 PluginConnector]: CDTParser initialized [2024-06-20 16:47:45,459 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-wmm/safe002_rmo.oepc.i [2024-06-20 16:47:46,488 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-06-20 16:47:46,727 INFO L384 CDTParser]: Found 1 translation units. [2024-06-20 16:47:46,728 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/safe002_rmo.oepc.i [2024-06-20 16:47:46,741 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3e37e8712/865c169696004ab3b4b740c881471124/FLAG09ce6a7fa [2024-06-20 16:47:46,760 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3e37e8712/865c169696004ab3b4b740c881471124 [2024-06-20 16:47:46,761 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-06-20 16:47:46,762 INFO L274 PluginConnector]: Witness Parser initialized [2024-06-20 16:47:46,764 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/./goblint.2024-05-21_14-57-05.files/protection/safe002_rmo.oepc.yml/witness.yml [2024-06-20 16:47:46,918 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-06-20 16:47:46,919 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-06-20 16:47:46,920 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-06-20 16:47:46,920 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-06-20 16:47:46,924 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-06-20 16:47:46,924 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.06 04:47:46" (1/2) ... [2024-06-20 16:47:46,929 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1c64ce04 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.06 04:47:46, skipping insertion in model container [2024-06-20 16:47:46,929 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.06 04:47:46" (1/2) ... [2024-06-20 16:47:46,931 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@63d5eb81 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.06 04:47:46, skipping insertion in model container [2024-06-20 16:47:46,931 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 20.06 04:47:46" (2/2) ... [2024-06-20 16:47:46,931 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1c64ce04 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 20.06 04:47:46, skipping insertion in model container [2024-06-20 16:47:46,932 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 20.06 04:47:46" (2/2) ... [2024-06-20 16:47:46,932 INFO L83 nessWitnessExtractor]: Extracting all invariants from correctness witness [2024-06-20 16:47:47,052 INFO L95 edCorrectnessWitness]: Found the following entries in the witness: [2024-06-20 16:47:47,053 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_p0_EBX && __unbuffered_p0_EBX <= 1) && (__unbuffered_p0_EBX == 0 || __unbuffered_p0_EBX == 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$read_delayed == (_Bool)0) [2024-06-20 16:47:47,053 INFO L97 edCorrectnessWitness]: Location invariant before [L857-L857] ((((((((((((((((((((((((((((((((((((! multithreaded || (((0 <= y && y <= 2) && y <= 127) && ((y == 0 || y == 1) || y == 2))) && (! multithreaded || __unbuffered_p0_EAX$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$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p0_EBX && __unbuffered_p0_EBX <= 1) && (__unbuffered_p0_EBX == 0 || __unbuffered_p0_EBX == 1)))) && (! multithreaded || (((0 <= __unbuffered_p2_EAX && __unbuffered_p2_EAX <= 2) && __unbuffered_p2_EAX <= 127) && ((__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1) || __unbuffered_p2_EAX == 2)))) && (! multithreaded || y$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 16:47:47,054 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_p0_EBX && __unbuffered_p0_EBX <= 1) && (__unbuffered_p0_EBX == 0 || __unbuffered_p0_EBX == 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 16:47:47,054 INFO L103 edCorrectnessWitness]: ghost_variable multithreaded = 0 [2024-06-20 16:47:47,054 INFO L106 edCorrectnessWitness]: ghost_update [L853-L853] multithreaded = 1; [2024-06-20 16:47:47,091 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-06-20 16:47:47,433 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-20 16:47:47,442 INFO L202 MainTranslator]: Completed pre-run Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local [2024-06-20 16:47:47,567 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-20 16:47:47,610 INFO L206 MainTranslator]: Completed translation [2024-06-20 16:47:47,611 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 20.06 04:47:47 WrapperNode [2024-06-20 16:47:47,611 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-06-20 16:47:47,612 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-06-20 16:47:47,612 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-06-20 16:47:47,612 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-06-20 16:47:47,617 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 04:47:47" (1/1) ... [2024-06-20 16:47:47,655 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 04:47:47" (1/1) ... [2024-06-20 16:47:47,708 INFO L138 Inliner]: procedures = 175, calls = 107, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 279 [2024-06-20 16:47:47,709 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-06-20 16:47:47,710 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-06-20 16:47:47,710 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-06-20 16:47:47,710 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-06-20 16:47:47,719 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 04:47:47" (1/1) ... [2024-06-20 16:47:47,720 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 04:47:47" (1/1) ... [2024-06-20 16:47:47,724 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 04:47:47" (1/1) ... [2024-06-20 16:47:47,739 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 16:47:47,739 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 04:47:47" (1/1) ... [2024-06-20 16:47:47,739 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 04:47:47" (1/1) ... [2024-06-20 16:47:47,750 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 04:47:47" (1/1) ... [2024-06-20 16:47:47,752 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 04:47:47" (1/1) ... [2024-06-20 16:47:47,759 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 04:47:47" (1/1) ... [2024-06-20 16:47:47,761 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 04:47:47" (1/1) ... [2024-06-20 16:47:47,765 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-06-20 16:47:47,780 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-06-20 16:47:47,781 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-06-20 16:47:47,781 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-06-20 16:47:47,781 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 04:47:47" (1/1) ... [2024-06-20 16:47:47,786 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-20 16:47:47,792 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-20 16:47:47,806 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 16:47:47,849 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 16:47:47,866 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-06-20 16:47:47,866 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-06-20 16:47:47,867 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-06-20 16:47:47,867 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-06-20 16:47:47,867 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-06-20 16:47:47,867 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-06-20 16:47:47,867 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2024-06-20 16:47:47,868 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2024-06-20 16:47:47,868 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2024-06-20 16:47:47,868 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2024-06-20 16:47:47,868 INFO L130 BoogieDeclarations]: Found specification of procedure P2 [2024-06-20 16:47:47,868 INFO L138 BoogieDeclarations]: Found implementation of procedure P2 [2024-06-20 16:47:47,868 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-06-20 16:47:47,868 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-06-20 16:47:47,869 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-06-20 16:47:47,869 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-06-20 16:47:47,871 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-06-20 16:47:47,872 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 16:47:48,042 INFO L244 CfgBuilder]: Building ICFG [2024-06-20 16:47:48,045 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-06-20 16:47:48,558 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-06-20 16:47:48,558 INFO L293 CfgBuilder]: Performing block encoding [2024-06-20 16:47:49,071 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-06-20 16:47:49,071 INFO L320 CfgBuilder]: Removed 0 assume(true) statements. [2024-06-20 16:47:49,072 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.06 04:47:49 BoogieIcfgContainer [2024-06-20 16:47:49,072 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-06-20 16:47:49,075 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-06-20 16:47:49,075 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-06-20 16:47:49,078 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-06-20 16:47:49,078 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.06 04:47:46" (1/4) ... [2024-06-20 16:47:49,079 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@d7d9c43 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.06 04:47:49, skipping insertion in model container [2024-06-20 16:47:49,079 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 20.06 04:47:46" (2/4) ... [2024-06-20 16:47:49,079 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@d7d9c43 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 20.06 04:47:49, skipping insertion in model container [2024-06-20 16:47:49,079 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 04:47:47" (3/4) ... [2024-06-20 16:47:49,080 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@d7d9c43 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 20.06 04:47:49, skipping insertion in model container [2024-06-20 16:47:49,080 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.06 04:47:49" (4/4) ... [2024-06-20 16:47:49,081 INFO L112 eAbstractionObserver]: Analyzing ICFG safe002_rmo.oepc.i [2024-06-20 16:47:49,095 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-06-20 16:47:49,095 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 3 error locations. [2024-06-20 16:47:49,096 INFO L522 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-06-20 16:47:49,171 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-06-20 16:47:49,199 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 52 places, 42 transitions, 96 flow [2024-06-20 16:47:49,229 INFO L124 PetriNetUnfolderBase]: 0/39 cut-off events. [2024-06-20 16:47:49,229 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-20 16:47:49,231 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 16:47:49,231 INFO L82 GeneralOperation]: Start removeDead. Operand has 52 places, 42 transitions, 96 flow [2024-06-20 16:47:49,234 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 43 places, 33 transitions, 75 flow [2024-06-20 16:47:49,245 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-06-20 16:47:49,251 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;@33f2c8dd, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-06-20 16:47:49,251 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2024-06-20 16:47:49,256 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-06-20 16:47:49,256 INFO L124 PetriNetUnfolderBase]: 0/5 cut-off events. [2024-06-20 16:47:49,256 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-20 16:47:49,256 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:47:49,257 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2024-06-20 16:47:49,257 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 16:47:49,262 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:47:49,263 INFO L85 PathProgramCache]: Analyzing trace with hash 906645505, now seen corresponding path program 1 times [2024-06-20 16:47:49,269 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:47:49,270 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1387341747] [2024-06-20 16:47:49,270 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:47:49,270 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:47:49,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:47:51,066 INFO 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 16:47:51,066 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:47:51,067 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1387341747] [2024-06-20 16:47:51,068 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1387341747] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:47:51,068 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:47:51,068 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-06-20 16:47:51,069 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [573014560] [2024-06-20 16:47:51,069 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:47:51,075 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-06-20 16:47:51,078 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:47:51,100 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-06-20 16:47:51,101 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-06-20 16:47:51,113 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-20 16:47:51,115 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 16:47:51,115 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:47:51,115 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-20 16:47:51,116 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:47:51,687 INFO L124 PetriNetUnfolderBase]: 1097/1694 cut-off events. [2024-06-20 16:47:51,687 INFO L125 PetriNetUnfolderBase]: For 27/27 co-relation queries the response was YES. [2024-06-20 16:47:51,693 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3423 conditions, 1694 events. 1097/1694 cut-off events. For 27/27 co-relation queries the response was YES. Maximal size of possible extension queue 91. Compared 8167 event pairs, 643 based on Foata normal form. 2/1663 useless extension candidates. Maximal degree in co-relation 3411. Up to 1653 conditions per place. [2024-06-20 16:47:51,700 INFO L140 encePairwiseOnDemand]: 35/42 looper letters, 36 selfloop transitions, 4 changer transitions 0/46 dead transitions. [2024-06-20 16:47:51,700 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 45 places, 46 transitions, 187 flow [2024-06-20 16:47:51,701 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-06-20 16:47:51,703 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-06-20 16:47:51,708 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 70 transitions. [2024-06-20 16:47:51,709 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5555555555555556 [2024-06-20 16:47:51,711 INFO L175 Difference]: Start difference. First operand has 43 places, 33 transitions, 75 flow. Second operand 3 states and 70 transitions. [2024-06-20 16:47:51,711 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 45 places, 46 transitions, 187 flow [2024-06-20 16:47:51,713 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 16:47:51,717 INFO L231 Difference]: Finished difference. Result has 43 places, 36 transitions, 102 flow [2024-06-20 16:47:51,718 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 16:47:51,721 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 0 predicate places. [2024-06-20 16:47:51,721 INFO L495 AbstractCegarLoop]: Abstraction has has 43 places, 36 transitions, 102 flow [2024-06-20 16:47:51,721 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 16:47:51,721 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:47:51,721 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:47:51,722 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-06-20 16:47:51,722 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 16:47:51,723 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:47:51,723 INFO L85 PathProgramCache]: Analyzing trace with hash -591977984, now seen corresponding path program 1 times [2024-06-20 16:47:51,723 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:47:51,723 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [55576779] [2024-06-20 16:47:51,723 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:47:51,723 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:47:51,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:47:54,078 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 16:47:54,078 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:47:54,079 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [55576779] [2024-06-20 16:47:54,079 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [55576779] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:47:54,079 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:47:54,079 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-06-20 16:47:54,079 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1585561992] [2024-06-20 16:47:54,079 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:47:54,080 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-20 16:47:54,081 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:47:54,081 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-20 16:47:54,081 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-06-20 16:47:54,100 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-20 16:47:54,101 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 16:47:54,101 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:47:54,101 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-20 16:47:54,101 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:47:54,715 INFO L124 PetriNetUnfolderBase]: 1088/1681 cut-off events. [2024-06-20 16:47:54,716 INFO L125 PetriNetUnfolderBase]: For 326/326 co-relation queries the response was YES. [2024-06-20 16:47:54,718 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3878 conditions, 1681 events. 1088/1681 cut-off events. For 326/326 co-relation queries the response was YES. Maximal size of possible extension queue 91. Compared 8204 event pairs, 496 based on Foata normal form. 4/1684 useless extension candidates. Maximal degree in co-relation 3866. Up to 1616 conditions per place. [2024-06-20 16:47:54,723 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 46 selfloop transitions, 7 changer transitions 0/59 dead transitions. [2024-06-20 16:47:54,723 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 59 transitions, 266 flow [2024-06-20 16:47:54,723 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-20 16:47:54,723 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-20 16:47:54,724 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 92 transitions. [2024-06-20 16:47:54,724 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5476190476190477 [2024-06-20 16:47:54,725 INFO L175 Difference]: Start difference. First operand has 43 places, 36 transitions, 102 flow. Second operand 4 states and 92 transitions. [2024-06-20 16:47:54,725 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 59 transitions, 266 flow [2024-06-20 16:47:54,725 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 16:47:54,726 INFO L231 Difference]: Finished difference. Result has 46 places, 39 transitions, 138 flow [2024-06-20 16:47:54,726 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 16:47:54,727 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 3 predicate places. [2024-06-20 16:47:54,727 INFO L495 AbstractCegarLoop]: Abstraction has has 46 places, 39 transitions, 138 flow [2024-06-20 16:47:54,727 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 16:47:54,728 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:47:54,728 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:47:54,728 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-06-20 16:47:54,728 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 16:47:54,728 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:47:54,729 INFO L85 PathProgramCache]: Analyzing trace with hash -478703922, now seen corresponding path program 1 times [2024-06-20 16:47:54,729 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:47:54,729 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [82607238] [2024-06-20 16:47:54,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:47:54,729 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:47:54,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:47:57,391 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:47:57,392 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:47:57,392 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [82607238] [2024-06-20 16:47:57,392 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [82607238] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:47:57,392 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:47:57,392 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-20 16:47:57,393 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [13562459] [2024-06-20 16:47:57,393 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:47:57,393 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-20 16:47:57,393 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:47:57,394 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-20 16:47:57,394 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-06-20 16:47:57,401 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-20 16:47:57,402 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 46 places, 39 transitions, 138 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 16:47:57,402 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:47:57,402 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-20 16:47:57,402 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:47:58,279 INFO L124 PetriNetUnfolderBase]: 1377/2089 cut-off events. [2024-06-20 16:47:58,279 INFO L125 PetriNetUnfolderBase]: For 1089/1089 co-relation queries the response was YES. [2024-06-20 16:47:58,282 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5323 conditions, 2089 events. 1377/2089 cut-off events. For 1089/1089 co-relation queries the response was YES. Maximal size of possible extension queue 97. Compared 9831 event pairs, 416 based on Foata normal form. 8/2096 useless extension candidates. Maximal degree in co-relation 5309. Up to 1964 conditions per place. [2024-06-20 16:47:58,288 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 63 selfloop transitions, 12 changer transitions 0/80 dead transitions. [2024-06-20 16:47:58,288 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 50 places, 80 transitions, 398 flow [2024-06-20 16:47:58,289 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-20 16:47:58,289 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-20 16:47:58,290 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 126 transitions. [2024-06-20 16:47:58,291 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5 [2024-06-20 16:47:58,291 INFO L175 Difference]: Start difference. First operand has 46 places, 39 transitions, 138 flow. Second operand 6 states and 126 transitions. [2024-06-20 16:47:58,291 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 50 places, 80 transitions, 398 flow [2024-06-20 16:47:58,292 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 48 places, 80 transitions, 378 flow, removed 4 selfloop flow, removed 2 redundant places. [2024-06-20 16:47:58,293 INFO L231 Difference]: Finished difference. Result has 50 places, 43 transitions, 181 flow [2024-06-20 16:47:58,293 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=118, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=181, PETRI_PLACES=50, PETRI_TRANSITIONS=43} [2024-06-20 16:47:58,294 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 7 predicate places. [2024-06-20 16:47:58,294 INFO L495 AbstractCegarLoop]: Abstraction has has 50 places, 43 transitions, 181 flow [2024-06-20 16:47:58,294 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 16:47:58,294 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:47:58,295 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:47:58,295 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-06-20 16:47:58,295 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:47:58,295 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:47:58,295 INFO L85 PathProgramCache]: Analyzing trace with hash -1961594941, now seen corresponding path program 1 times [2024-06-20 16:47:58,296 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:47:58,296 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1014393670] [2024-06-20 16:47:58,296 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:47:58,296 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:47:58,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:47:59,659 INFO 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 16:47:59,659 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:47:59,659 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1014393670] [2024-06-20 16:47:59,660 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1014393670] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:47:59,660 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:47:59,660 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-20 16:47:59,660 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1535067829] [2024-06-20 16:47:59,660 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:47:59,660 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-20 16:47:59,660 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:47:59,661 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-20 16:47:59,661 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-06-20 16:47:59,676 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-20 16:47:59,676 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 50 places, 43 transitions, 181 flow. Second operand has 6 states, 6 states have (on average 8.666666666666666) internal successors, (52), 6 states have internal predecessors, (52), 0 states have call successors, (0), 0 states 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 16:47:59,676 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:47:59,676 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-20 16:47:59,676 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:48:00,507 INFO L124 PetriNetUnfolderBase]: 1369/2078 cut-off events. [2024-06-20 16:48:00,508 INFO L125 PetriNetUnfolderBase]: For 2042/2042 co-relation queries the response was YES. [2024-06-20 16:48:00,511 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5812 conditions, 2078 events. 1369/2078 cut-off events. For 2042/2042 co-relation queries the response was YES. Maximal size of possible extension queue 97. Compared 9784 event pairs, 527 based on Foata normal form. 3/2080 useless extension candidates. Maximal degree in co-relation 5795. Up to 2033 conditions per place. [2024-06-20 16:48:00,518 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 50 selfloop transitions, 8 changer transitions 0/62 dead transitions. [2024-06-20 16:48:00,518 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 54 places, 62 transitions, 349 flow [2024-06-20 16:48:00,518 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-20 16:48:00,518 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-20 16:48:00,519 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 87 transitions. [2024-06-20 16:48:00,519 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4142857142857143 [2024-06-20 16:48:00,519 INFO L175 Difference]: Start difference. First operand has 50 places, 43 transitions, 181 flow. Second operand 5 states and 87 transitions. [2024-06-20 16:48:00,519 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 54 places, 62 transitions, 349 flow [2024-06-20 16:48:00,521 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 51 places, 62 transitions, 322 flow, removed 4 selfloop flow, removed 3 redundant places. [2024-06-20 16:48:00,522 INFO L231 Difference]: Finished difference. Result has 52 places, 46 transitions, 198 flow [2024-06-20 16:48:00,522 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=154, PETRI_DIFFERENCE_MINUEND_PLACES=47, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=198, PETRI_PLACES=52, PETRI_TRANSITIONS=46} [2024-06-20 16:48:00,523 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 9 predicate places. [2024-06-20 16:48:00,523 INFO L495 AbstractCegarLoop]: Abstraction has has 52 places, 46 transitions, 198 flow [2024-06-20 16:48:00,523 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 8.666666666666666) internal successors, (52), 6 states have internal predecessors, (52), 0 states have call successors, (0), 0 states 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 16:48:00,523 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:48:00,523 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:48:00,524 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-06-20 16:48:00,524 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 16:48:00,524 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:48:00,524 INFO L85 PathProgramCache]: Analyzing trace with hash -679899700, now seen corresponding path program 1 times [2024-06-20 16:48:00,524 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:48:00,524 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [37262354] [2024-06-20 16:48:00,527 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:48:00,528 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:48:00,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:48:02,227 INFO 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 16:48:02,228 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:48:02,228 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [37262354] [2024-06-20 16:48:02,228 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [37262354] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:48:02,228 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:48:02,228 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 16:48:02,228 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [496165278] [2024-06-20 16:48:02,228 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:48:02,228 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 16:48:02,229 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:48:02,229 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 16:48:02,229 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-20 16:48:02,238 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-20 16:48:02,239 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 52 places, 46 transitions, 198 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 16:48:02,239 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:48:02,239 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-20 16:48:02,239 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:48:03,289 INFO L124 PetriNetUnfolderBase]: 1359/2062 cut-off events. [2024-06-20 16:48:03,290 INFO L125 PetriNetUnfolderBase]: For 2884/2884 co-relation queries the response was YES. [2024-06-20 16:48:03,294 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6200 conditions, 2062 events. 1359/2062 cut-off events. For 2884/2884 co-relation queries the response was YES. Maximal size of possible extension queue 97. Compared 9487 event pairs, 566 based on Foata normal form. 4/2065 useless extension candidates. Maximal degree in co-relation 6181. Up to 2005 conditions per place. [2024-06-20 16:48:03,300 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 60 selfloop transitions, 11 changer transitions 0/75 dead transitions. [2024-06-20 16:48:03,300 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 57 places, 75 transitions, 430 flow [2024-06-20 16:48:03,300 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-20 16:48:03,300 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-20 16:48:03,304 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 101 transitions. [2024-06-20 16:48:03,304 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4007936507936508 [2024-06-20 16:48:03,304 INFO L175 Difference]: Start difference. First operand has 52 places, 46 transitions, 198 flow. Second operand 6 states and 101 transitions. [2024-06-20 16:48:03,304 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 57 places, 75 transitions, 430 flow [2024-06-20 16:48:03,306 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 54 places, 75 transitions, 403 flow, removed 5 selfloop flow, removed 3 redundant places. [2024-06-20 16:48:03,307 INFO L231 Difference]: Finished difference. Result has 57 places, 55 transitions, 265 flow [2024-06-20 16:48:03,307 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=178, PETRI_DIFFERENCE_MINUEND_PLACES=49, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=265, PETRI_PLACES=57, PETRI_TRANSITIONS=55} [2024-06-20 16:48:03,308 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 14 predicate places. [2024-06-20 16:48:03,308 INFO L495 AbstractCegarLoop]: Abstraction has has 57 places, 55 transitions, 265 flow [2024-06-20 16:48:03,308 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 16:48:03,308 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:48:03,309 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:48:03,309 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-06-20 16:48:03,309 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 16:48:03,309 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:48:03,309 INFO L85 PathProgramCache]: Analyzing trace with hash 392225282, now seen corresponding path program 1 times [2024-06-20 16:48:03,309 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:48:03,310 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [899190070] [2024-06-20 16:48:03,310 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:48:03,310 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:48:03,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:48:05,855 INFO 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 16:48:05,855 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:48:05,856 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [899190070] [2024-06-20 16:48:05,856 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [899190070] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:48:05,856 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:48:05,856 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 16:48:05,856 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1682411490] [2024-06-20 16:48:05,856 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:48:05,857 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 16:48:05,857 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:48:05,857 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 16:48:05,857 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-20 16:48:05,869 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-20 16:48:05,869 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 57 places, 55 transitions, 265 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 16:48:05,870 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:48:05,870 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-20 16:48:05,870 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:48:06,928 INFO L124 PetriNetUnfolderBase]: 1377/2091 cut-off events. [2024-06-20 16:48:06,929 INFO L125 PetriNetUnfolderBase]: For 4101/4103 co-relation queries the response was YES. [2024-06-20 16:48:06,932 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6825 conditions, 2091 events. 1377/2091 cut-off events. For 4101/4103 co-relation queries the response was YES. Maximal size of possible extension queue 97. Compared 9774 event pairs, 507 based on Foata normal form. 5/2095 useless extension candidates. Maximal degree in co-relation 6803. Up to 1985 conditions per place. [2024-06-20 16:48:06,938 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 65 selfloop transitions, 19 changer transitions 0/88 dead transitions. [2024-06-20 16:48:06,938 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 62 places, 88 transitions, 557 flow [2024-06-20 16:48:06,939 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-20 16:48:06,939 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-20 16:48:06,939 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 111 transitions. [2024-06-20 16:48:06,940 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44047619047619047 [2024-06-20 16:48:06,940 INFO L175 Difference]: Start difference. First operand has 57 places, 55 transitions, 265 flow. Second operand 6 states and 111 transitions. [2024-06-20 16:48:06,940 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 62 places, 88 transitions, 557 flow [2024-06-20 16:48:06,942 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 61 places, 88 transitions, 551 flow, removed 2 selfloop flow, removed 1 redundant places. [2024-06-20 16:48:06,943 INFO L231 Difference]: Finished difference. Result has 62 places, 61 transitions, 347 flow [2024-06-20 16:48:06,943 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=259, PETRI_DIFFERENCE_MINUEND_PLACES=56, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=55, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=347, PETRI_PLACES=62, PETRI_TRANSITIONS=61} [2024-06-20 16:48:06,944 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 19 predicate places. [2024-06-20 16:48:06,944 INFO L495 AbstractCegarLoop]: Abstraction has has 62 places, 61 transitions, 347 flow [2024-06-20 16:48:06,944 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 16:48:06,944 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:48:06,944 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:48:06,944 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-06-20 16:48:06,944 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 16:48:06,945 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:48:06,945 INFO L85 PathProgramCache]: Analyzing trace with hash 885022052, now seen corresponding path program 2 times [2024-06-20 16:48:06,945 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:48:06,945 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [252628393] [2024-06-20 16:48:06,945 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:48:06,945 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:48:06,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:48:09,053 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:48:09,054 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:48:09,054 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [252628393] [2024-06-20 16:48:09,054 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [252628393] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:48:09,054 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:48:09,054 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 16:48:09,054 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1091868988] [2024-06-20 16:48:09,054 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:48:09,055 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 16:48:09,055 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:48:09,055 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 16:48:09,055 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-20 16:48:09,070 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-20 16:48:09,070 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 62 places, 61 transitions, 347 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 16:48:09,070 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:48:09,071 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-20 16:48:09,071 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:48:10,101 INFO L124 PetriNetUnfolderBase]: 1369/2081 cut-off events. [2024-06-20 16:48:10,101 INFO L125 PetriNetUnfolderBase]: For 5638/5640 co-relation queries the response was YES. [2024-06-20 16:48:10,105 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7328 conditions, 2081 events. 1369/2081 cut-off events. For 5638/5640 co-relation queries the response was YES. Maximal size of possible extension queue 97. Compared 9733 event pairs, 510 based on Foata normal form. 5/2085 useless extension candidates. Maximal degree in co-relation 7303. Up to 1978 conditions per place. [2024-06-20 16:48:10,115 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 60 selfloop transitions, 19 changer transitions 0/83 dead transitions. [2024-06-20 16:48:10,116 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 67 places, 83 transitions, 563 flow [2024-06-20 16:48:10,116 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-20 16:48:10,116 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-20 16:48:10,118 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 105 transitions. [2024-06-20 16:48:10,118 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4166666666666667 [2024-06-20 16:48:10,119 INFO L175 Difference]: Start difference. First operand has 62 places, 61 transitions, 347 flow. Second operand 6 states and 105 transitions. [2024-06-20 16:48:10,119 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 67 places, 83 transitions, 563 flow [2024-06-20 16:48:10,123 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 65 places, 83 transitions, 530 flow, removed 11 selfloop flow, removed 2 redundant places. [2024-06-20 16:48:10,124 INFO L231 Difference]: Finished difference. Result has 66 places, 61 transitions, 361 flow [2024-06-20 16:48:10,124 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=314, PETRI_DIFFERENCE_MINUEND_PLACES=60, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=61, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=361, PETRI_PLACES=66, PETRI_TRANSITIONS=61} [2024-06-20 16:48:10,126 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 23 predicate places. [2024-06-20 16:48:10,126 INFO L495 AbstractCegarLoop]: Abstraction has has 66 places, 61 transitions, 361 flow [2024-06-20 16:48:10,126 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 16:48:10,126 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:48:10,126 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:48:10,127 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-06-20 16:48:10,127 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 16:48:10,127 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:48:10,127 INFO L85 PathProgramCache]: Analyzing trace with hash 1603429801, now seen corresponding path program 1 times [2024-06-20 16:48:10,127 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:48:10,127 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1089912031] [2024-06-20 16:48:10,128 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:48:10,128 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:48:10,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:48:12,443 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:48:12,443 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:48:12,444 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1089912031] [2024-06-20 16:48:12,444 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1089912031] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:48:12,444 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:48:12,444 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 16:48:12,444 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [126342503] [2024-06-20 16:48:12,444 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:48:12,444 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 16:48:12,444 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:48:12,445 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 16:48:12,445 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2024-06-20 16:48:12,469 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-20 16:48:12,469 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 61 transitions, 361 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 16:48:12,469 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:48:12,469 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-20 16:48:12,469 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:48:14,169 INFO L124 PetriNetUnfolderBase]: 1603/2429 cut-off events. [2024-06-20 16:48:14,170 INFO L125 PetriNetUnfolderBase]: For 7514/7516 co-relation queries the response was YES. [2024-06-20 16:48:14,174 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8609 conditions, 2429 events. 1603/2429 cut-off events. For 7514/7516 co-relation queries the response was YES. Maximal size of possible extension queue 106. Compared 11473 event pairs, 522 based on Foata normal form. 19/2447 useless extension candidates. Maximal degree in co-relation 8582. Up to 2162 conditions per place. [2024-06-20 16:48:14,181 INFO L140 encePairwiseOnDemand]: 28/42 looper letters, 96 selfloop transitions, 37 changer transitions 0/137 dead transitions. [2024-06-20 16:48:14,182 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 76 places, 137 transitions, 917 flow [2024-06-20 16:48:14,184 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-20 16:48:14,185 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-20 16:48:14,185 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 190 transitions. [2024-06-20 16:48:14,185 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41125541125541126 [2024-06-20 16:48:14,185 INFO L175 Difference]: Start difference. First operand has 66 places, 61 transitions, 361 flow. Second operand 11 states and 190 transitions. [2024-06-20 16:48:14,185 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 76 places, 137 transitions, 917 flow [2024-06-20 16:48:14,190 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 70 places, 137 transitions, 853 flow, removed 2 selfloop flow, removed 6 redundant places. [2024-06-20 16:48:14,192 INFO L231 Difference]: Finished difference. Result has 75 places, 86 transitions, 549 flow [2024-06-20 16:48:14,192 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=309, PETRI_DIFFERENCE_MINUEND_PLACES=60, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=61, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=549, PETRI_PLACES=75, PETRI_TRANSITIONS=86} [2024-06-20 16:48:14,192 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 32 predicate places. [2024-06-20 16:48:14,192 INFO L495 AbstractCegarLoop]: Abstraction has has 75 places, 86 transitions, 549 flow [2024-06-20 16:48:14,192 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 16:48:14,193 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:48:14,193 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:48:14,193 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-06-20 16:48:14,193 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 16:48:14,193 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:48:14,193 INFO L85 PathProgramCache]: Analyzing trace with hash -726036975, now seen corresponding path program 2 times [2024-06-20 16:48:14,193 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:48:14,194 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1250346840] [2024-06-20 16:48:14,194 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:48:14,194 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:48:14,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:48:16,842 INFO 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 16:48:16,842 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:48:16,843 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1250346840] [2024-06-20 16:48:16,843 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1250346840] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:48:16,843 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:48:16,843 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 16:48:16,843 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [496052779] [2024-06-20 16:48:16,843 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:48:16,844 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 16:48:16,844 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:48:16,845 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 16:48:16,845 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-20 16:48:16,879 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-20 16:48:16,883 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 75 places, 86 transitions, 549 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 16:48:16,883 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:48:16,883 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-20 16:48:16,883 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:48:17,940 INFO L124 PetriNetUnfolderBase]: 1621/2467 cut-off events. [2024-06-20 16:48:17,940 INFO L125 PetriNetUnfolderBase]: For 11114/11118 co-relation queries the response was YES. [2024-06-20 16:48:17,946 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10008 conditions, 2467 events. 1621/2467 cut-off events. For 11114/11118 co-relation queries the response was YES. Maximal size of possible extension queue 108. Compared 11855 event pairs, 507 based on Foata normal form. 7/2473 useless extension candidates. Maximal degree in co-relation 9977. Up to 2284 conditions per place. [2024-06-20 16:48:17,954 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 96 selfloop transitions, 26 changer transitions 0/126 dead transitions. [2024-06-20 16:48:17,954 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 81 places, 126 transitions, 945 flow [2024-06-20 16:48:17,954 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 16:48:17,955 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 16:48:17,955 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 127 transitions. [2024-06-20 16:48:17,956 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43197278911564624 [2024-06-20 16:48:17,956 INFO L175 Difference]: Start difference. First operand has 75 places, 86 transitions, 549 flow. Second operand 7 states and 127 transitions. [2024-06-20 16:48:17,956 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 81 places, 126 transitions, 945 flow [2024-06-20 16:48:17,966 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 79 places, 126 transitions, 921 flow, removed 8 selfloop flow, removed 2 redundant places. [2024-06-20 16:48:17,967 INFO L231 Difference]: Finished difference. Result has 80 places, 90 transitions, 629 flow [2024-06-20 16:48:17,968 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=527, PETRI_DIFFERENCE_MINUEND_PLACES=73, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=86, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=60, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=629, PETRI_PLACES=80, PETRI_TRANSITIONS=90} [2024-06-20 16:48:17,968 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 37 predicate places. [2024-06-20 16:48:17,968 INFO L495 AbstractCegarLoop]: Abstraction has has 80 places, 90 transitions, 629 flow [2024-06-20 16:48:17,969 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 16:48:17,969 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:48:17,969 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:48:17,969 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-06-20 16:48:17,969 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 16:48:17,969 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:48:17,969 INFO L85 PathProgramCache]: Analyzing trace with hash -171857471, now seen corresponding path program 3 times [2024-06-20 16:48:17,969 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:48:17,970 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1535712388] [2024-06-20 16:48:17,970 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:48:17,970 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:48:17,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:48:20,638 INFO 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 16:48:20,639 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:48:20,639 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1535712388] [2024-06-20 16:48:20,639 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1535712388] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:48:20,639 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:48:20,639 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 16:48:20,639 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [353802410] [2024-06-20 16:48:20,639 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:48:20,640 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 16:48:20,640 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:48:20,640 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 16:48:20,640 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-20 16:48:20,675 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-20 16:48:20,675 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 80 places, 90 transitions, 629 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 16:48:20,675 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:48:20,675 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-20 16:48:20,675 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:48:21,908 INFO L124 PetriNetUnfolderBase]: 1639/2493 cut-off events. [2024-06-20 16:48:21,908 INFO L125 PetriNetUnfolderBase]: For 13927/13931 co-relation queries the response was YES. [2024-06-20 16:48:21,938 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10803 conditions, 2493 events. 1639/2493 cut-off events. For 13927/13931 co-relation queries the response was YES. Maximal size of possible extension queue 108. Compared 11899 event pairs, 526 based on Foata normal form. 5/2497 useless extension candidates. Maximal degree in co-relation 10770. Up to 2218 conditions per place. [2024-06-20 16:48:21,946 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 87 selfloop transitions, 38 changer transitions 0/129 dead transitions. [2024-06-20 16:48:21,946 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 86 places, 129 transitions, 1080 flow [2024-06-20 16:48:21,947 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 16:48:21,947 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 16:48:21,948 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 129 transitions. [2024-06-20 16:48:21,948 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4387755102040816 [2024-06-20 16:48:21,948 INFO L175 Difference]: Start difference. First operand has 80 places, 90 transitions, 629 flow. Second operand 7 states and 129 transitions. [2024-06-20 16:48:21,948 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 86 places, 129 transitions, 1080 flow [2024-06-20 16:48:21,958 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 81 places, 129 transitions, 1017 flow, removed 9 selfloop flow, removed 5 redundant places. [2024-06-20 16:48:21,959 INFO L231 Difference]: Finished difference. Result has 82 places, 96 transitions, 716 flow [2024-06-20 16:48:21,960 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=566, PETRI_DIFFERENCE_MINUEND_PLACES=75, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=90, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=55, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=716, PETRI_PLACES=82, PETRI_TRANSITIONS=96} [2024-06-20 16:48:21,960 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 39 predicate places. [2024-06-20 16:48:21,961 INFO L495 AbstractCegarLoop]: Abstraction has has 82 places, 96 transitions, 716 flow [2024-06-20 16:48:21,961 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 16:48:21,961 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:48:21,961 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:48:21,961 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-06-20 16:48:21,961 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 16:48:21,962 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:48:21,962 INFO L85 PathProgramCache]: Analyzing trace with hash 1160750733, now seen corresponding path program 1 times [2024-06-20 16:48:21,962 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:48:21,962 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [647785015] [2024-06-20 16:48:21,962 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:48:21,962 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:48:21,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:48:24,811 INFO 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 16:48:24,811 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:48:24,813 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [647785015] [2024-06-20 16:48:24,813 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [647785015] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:48:24,813 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:48:24,814 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 16:48:24,814 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1403462230] [2024-06-20 16:48:24,814 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:48:24,815 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 16:48:24,815 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:48:24,816 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 16:48:24,816 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-20 16:48:24,828 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-20 16:48:24,828 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 82 places, 96 transitions, 716 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 16:48:24,829 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:48:24,829 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-20 16:48:24,829 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:48:26,013 INFO L124 PetriNetUnfolderBase]: 1851/2799 cut-off events. [2024-06-20 16:48:26,014 INFO L125 PetriNetUnfolderBase]: For 18624/18630 co-relation queries the response was YES. [2024-06-20 16:48:26,019 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12524 conditions, 2799 events. 1851/2799 cut-off events. For 18624/18630 co-relation queries the response was YES. Maximal size of possible extension queue 126. Compared 13480 event pairs, 526 based on Foata normal form. 16/2814 useless extension candidates. Maximal degree in co-relation 12490. Up to 2455 conditions per place. [2024-06-20 16:48:26,026 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 117 selfloop transitions, 40 changer transitions 0/161 dead transitions. [2024-06-20 16:48:26,026 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 90 places, 161 transitions, 1370 flow [2024-06-20 16:48:26,027 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 16:48:26,027 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 16:48:26,028 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 166 transitions. [2024-06-20 16:48:26,028 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43915343915343913 [2024-06-20 16:48:26,028 INFO L175 Difference]: Start difference. First operand has 82 places, 96 transitions, 716 flow. Second operand 9 states and 166 transitions. [2024-06-20 16:48:26,028 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 90 places, 161 transitions, 1370 flow [2024-06-20 16:48:26,044 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 87 places, 161 transitions, 1323 flow, removed 12 selfloop flow, removed 3 redundant places. [2024-06-20 16:48:26,046 INFO L231 Difference]: Finished difference. Result has 90 places, 113 transitions, 919 flow [2024-06-20 16:48:26,047 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=669, PETRI_DIFFERENCE_MINUEND_PLACES=79, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=96, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=63, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=919, PETRI_PLACES=90, PETRI_TRANSITIONS=113} [2024-06-20 16:48:26,047 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 47 predicate places. [2024-06-20 16:48:26,047 INFO L495 AbstractCegarLoop]: Abstraction has has 90 places, 113 transitions, 919 flow [2024-06-20 16:48:26,047 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 16:48:26,047 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:48:26,048 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:48:26,048 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-06-20 16:48:26,048 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 16:48:26,048 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:48:26,048 INFO L85 PathProgramCache]: Analyzing trace with hash 1665880977, now seen corresponding path program 4 times [2024-06-20 16:48:26,048 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:48:26,048 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1379628159] [2024-06-20 16:48:26,049 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:48:26,049 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:48:26,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:48:28,254 INFO 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 16:48:28,254 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:48:28,254 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1379628159] [2024-06-20 16:48:28,255 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1379628159] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:48:28,255 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:48:28,255 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 16:48:28,255 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1866197665] [2024-06-20 16:48:28,255 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:48:28,255 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 16:48:28,256 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:48:28,256 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 16:48:28,256 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-20 16:48:28,284 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-20 16:48:28,284 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 90 places, 113 transitions, 919 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 16:48:28,285 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:48:28,285 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-20 16:48:28,285 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:48:29,599 INFO L124 PetriNetUnfolderBase]: 1843/2780 cut-off events. [2024-06-20 16:48:29,600 INFO L125 PetriNetUnfolderBase]: For 22441/22447 co-relation queries the response was YES. [2024-06-20 16:48:29,606 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13714 conditions, 2780 events. 1843/2780 cut-off events. For 22441/22447 co-relation queries the response was YES. Maximal size of possible extension queue 125. Compared 13247 event pairs, 559 based on Foata normal form. 4/2782 useless extension candidates. Maximal degree in co-relation 13676. Up to 2509 conditions per place. [2024-06-20 16:48:29,615 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 100 selfloop transitions, 38 changer transitions 0/142 dead transitions. [2024-06-20 16:48:29,615 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 96 places, 142 transitions, 1308 flow [2024-06-20 16:48:29,616 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 16:48:29,616 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 16:48:29,616 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 123 transitions. [2024-06-20 16:48:29,616 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41836734693877553 [2024-06-20 16:48:29,616 INFO L175 Difference]: Start difference. First operand has 90 places, 113 transitions, 919 flow. Second operand 7 states and 123 transitions. [2024-06-20 16:48:29,617 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 96 places, 142 transitions, 1308 flow [2024-06-20 16:48:29,633 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 92 places, 142 transitions, 1225 flow, removed 27 selfloop flow, removed 4 redundant places. [2024-06-20 16:48:29,638 INFO L231 Difference]: Finished difference. Result has 93 places, 113 transitions, 920 flow [2024-06-20 16:48:29,638 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=836, PETRI_DIFFERENCE_MINUEND_PLACES=86, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=113, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=75, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=920, PETRI_PLACES=93, PETRI_TRANSITIONS=113} [2024-06-20 16:48:29,640 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 50 predicate places. [2024-06-20 16:48:29,640 INFO L495 AbstractCegarLoop]: Abstraction has has 93 places, 113 transitions, 920 flow [2024-06-20 16:48:29,640 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 16:48:29,640 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:48:29,640 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:48:29,640 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-06-20 16:48:29,640 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 16:48:29,641 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:48:29,641 INFO L85 PathProgramCache]: Analyzing trace with hash 1167416973, now seen corresponding path program 2 times [2024-06-20 16:48:29,642 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:48:29,644 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1425219039] [2024-06-20 16:48:29,644 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:48:29,644 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:48:29,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:48:31,934 INFO 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 16:48:31,935 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:48:31,935 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1425219039] [2024-06-20 16:48:31,935 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1425219039] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:48:31,935 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:48:31,935 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 16:48:31,935 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [276447987] [2024-06-20 16:48:31,935 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:48:31,935 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 16:48:31,935 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:48:31,936 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 16:48:31,936 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-20 16:48:31,957 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-20 16:48:31,958 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 93 places, 113 transitions, 920 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 16:48:31,958 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:48:31,958 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-20 16:48:31,958 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:48:33,238 INFO L124 PetriNetUnfolderBase]: 1833/2768 cut-off events. [2024-06-20 16:48:33,238 INFO L125 PetriNetUnfolderBase]: For 24154/24160 co-relation queries the response was YES. [2024-06-20 16:48:33,245 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13793 conditions, 2768 events. 1833/2768 cut-off events. For 24154/24160 co-relation queries the response was YES. Maximal size of possible extension queue 123. Compared 13083 event pairs, 553 based on Foata normal form. 10/2777 useless extension candidates. Maximal degree in co-relation 13753. Up to 2549 conditions per place. [2024-06-20 16:48:33,254 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 128 selfloop transitions, 28 changer transitions 0/160 dead transitions. [2024-06-20 16:48:33,254 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 99 places, 160 transitions, 1523 flow [2024-06-20 16:48:33,255 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 16:48:33,255 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 16:48:33,256 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 122 transitions. [2024-06-20 16:48:33,256 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41496598639455784 [2024-06-20 16:48:33,256 INFO L175 Difference]: Start difference. First operand has 93 places, 113 transitions, 920 flow. Second operand 7 states and 122 transitions. [2024-06-20 16:48:33,256 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 99 places, 160 transitions, 1523 flow [2024-06-20 16:48:33,276 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 93 places, 160 transitions, 1407 flow, removed 5 selfloop flow, removed 6 redundant places. [2024-06-20 16:48:33,278 INFO L231 Difference]: Finished difference. Result has 97 places, 130 transitions, 1081 flow [2024-06-20 16:48:33,278 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=816, PETRI_DIFFERENCE_MINUEND_PLACES=87, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=113, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=87, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1081, PETRI_PLACES=97, PETRI_TRANSITIONS=130} [2024-06-20 16:48:33,278 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 54 predicate places. [2024-06-20 16:48:33,279 INFO L495 AbstractCegarLoop]: Abstraction has has 97 places, 130 transitions, 1081 flow [2024-06-20 16:48:33,279 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 16:48:33,279 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:48:33,279 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:48:33,279 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-06-20 16:48:33,279 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 16:48:33,279 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:48:33,280 INFO L85 PathProgramCache]: Analyzing trace with hash 1167179823, now seen corresponding path program 3 times [2024-06-20 16:48:33,280 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:48:33,280 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [252882172] [2024-06-20 16:48:33,280 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:48:33,280 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:48:33,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:48:35,643 INFO 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 16:48:35,644 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:48:35,644 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [252882172] [2024-06-20 16:48:35,644 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [252882172] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:48:35,644 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:48:35,644 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 16:48:35,644 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [89425879] [2024-06-20 16:48:35,644 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:48:35,645 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 16:48:35,645 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:48:35,645 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 16:48:35,645 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-20 16:48:35,667 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-20 16:48:35,668 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 97 places, 130 transitions, 1081 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 16:48:35,668 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:48:35,668 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-20 16:48:35,668 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:48:36,826 INFO L124 PetriNetUnfolderBase]: 1845/2786 cut-off events. [2024-06-20 16:48:36,827 INFO L125 PetriNetUnfolderBase]: For 27358/27372 co-relation queries the response was YES. [2024-06-20 16:48:36,834 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14432 conditions, 2786 events. 1845/2786 cut-off events. For 27358/27372 co-relation queries the response was YES. Maximal size of possible extension queue 125. Compared 13215 event pairs, 581 based on Foata normal form. 24/2809 useless extension candidates. Maximal degree in co-relation 14388. Up to 2556 conditions per place. [2024-06-20 16:48:36,843 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 124 selfloop transitions, 41 changer transitions 0/169 dead transitions. [2024-06-20 16:48:36,843 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 104 places, 169 transitions, 1614 flow [2024-06-20 16:48:36,844 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 16:48:36,844 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 16:48:36,845 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 139 transitions. [2024-06-20 16:48:36,845 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41369047619047616 [2024-06-20 16:48:36,845 INFO L175 Difference]: Start difference. First operand has 97 places, 130 transitions, 1081 flow. Second operand 8 states and 139 transitions. [2024-06-20 16:48:36,845 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 104 places, 169 transitions, 1614 flow [2024-06-20 16:48:36,877 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 103 places, 169 transitions, 1564 flow, removed 24 selfloop flow, removed 1 redundant places. [2024-06-20 16:48:36,879 INFO L231 Difference]: Finished difference. Result has 105 places, 136 transitions, 1215 flow [2024-06-20 16:48:36,880 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1037, PETRI_DIFFERENCE_MINUEND_PLACES=96, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=130, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=92, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1215, PETRI_PLACES=105, PETRI_TRANSITIONS=136} [2024-06-20 16:48:36,880 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 62 predicate places. [2024-06-20 16:48:36,880 INFO L495 AbstractCegarLoop]: Abstraction has has 105 places, 136 transitions, 1215 flow [2024-06-20 16:48:36,880 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 16:48:36,880 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:48:36,881 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:48:36,881 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-06-20 16:48:36,881 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 16:48:36,881 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:48:36,881 INFO L85 PathProgramCache]: Analyzing trace with hash -548539221, now seen corresponding path program 1 times [2024-06-20 16:48:36,881 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:48:36,881 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1526285955] [2024-06-20 16:48:36,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:48:36,882 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:48:36,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:48:39,327 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:48:39,327 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:48:39,327 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1526285955] [2024-06-20 16:48:39,327 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1526285955] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:48:39,327 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:48:39,328 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 16:48:39,328 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2062704978] [2024-06-20 16:48:39,328 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:48:39,328 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 16:48:39,328 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:48:39,329 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 16:48:39,332 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-20 16:48:39,343 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-20 16:48:39,343 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 105 places, 136 transitions, 1215 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 16:48:39,343 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:48:39,343 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-20 16:48:39,344 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:48:40,428 INFO L124 PetriNetUnfolderBase]: 1837/2772 cut-off events. [2024-06-20 16:48:40,429 INFO L125 PetriNetUnfolderBase]: For 30015/30017 co-relation queries the response was YES. [2024-06-20 16:48:40,436 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14792 conditions, 2772 events. 1837/2772 cut-off events. For 30015/30017 co-relation queries the response was YES. Maximal size of possible extension queue 123. Compared 13065 event pairs, 576 based on Foata normal form. 4/2775 useless extension candidates. Maximal degree in co-relation 14744. Up to 2665 conditions per place. [2024-06-20 16:48:40,444 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 147 selfloop transitions, 13 changer transitions 0/164 dead transitions. [2024-06-20 16:48:40,444 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 111 places, 164 transitions, 1625 flow [2024-06-20 16:48:40,445 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 16:48:40,445 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 16:48:40,446 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 116 transitions. [2024-06-20 16:48:40,446 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3945578231292517 [2024-06-20 16:48:40,446 INFO L175 Difference]: Start difference. First operand has 105 places, 136 transitions, 1215 flow. Second operand 7 states and 116 transitions. [2024-06-20 16:48:40,446 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 111 places, 164 transitions, 1625 flow [2024-06-20 16:48:40,477 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 107 places, 164 transitions, 1542 flow, removed 22 selfloop flow, removed 4 redundant places. [2024-06-20 16:48:40,478 INFO L231 Difference]: Finished difference. Result has 108 places, 138 transitions, 1187 flow [2024-06-20 16:48:40,479 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1132, PETRI_DIFFERENCE_MINUEND_PLACES=101, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=136, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=123, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1187, PETRI_PLACES=108, PETRI_TRANSITIONS=138} [2024-06-20 16:48:40,479 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 65 predicate places. [2024-06-20 16:48:40,479 INFO L495 AbstractCegarLoop]: Abstraction has has 108 places, 138 transitions, 1187 flow [2024-06-20 16:48:40,479 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 16:48:40,479 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:48:40,480 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:48:40,480 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-06-20 16:48:40,480 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 16:48:40,480 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:48:40,480 INFO L85 PathProgramCache]: Analyzing trace with hash -1036332048, now seen corresponding path program 1 times [2024-06-20 16:48:40,480 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:48:40,480 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1186070801] [2024-06-20 16:48:40,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:48:40,481 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:48:40,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:48:43,496 INFO 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 16:48:43,497 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:48:43,497 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1186070801] [2024-06-20 16:48:43,499 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1186070801] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:48:43,499 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:48:43,499 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 16:48:43,499 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1483212406] [2024-06-20 16:48:43,499 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:48:43,500 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 16:48:43,501 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:48:43,501 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 16:48:43,502 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-20 16:48:43,516 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-20 16:48:43,516 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 108 places, 138 transitions, 1187 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 16:48:43,517 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:48:43,517 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-20 16:48:43,517 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:48:45,206 INFO L124 PetriNetUnfolderBase]: 1974/2967 cut-off events. [2024-06-20 16:48:45,207 INFO L125 PetriNetUnfolderBase]: For 34811/34819 co-relation queries the response was YES. [2024-06-20 16:48:45,216 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15949 conditions, 2967 events. 1974/2967 cut-off events. For 34811/34819 co-relation queries the response was YES. Maximal size of possible extension queue 135. Compared 14176 event pairs, 511 based on Foata normal form. 18/2984 useless extension candidates. Maximal degree in co-relation 15899. Up to 2557 conditions per place. [2024-06-20 16:48:45,226 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 138 selfloop transitions, 62 changer transitions 0/204 dead transitions. [2024-06-20 16:48:45,226 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 117 places, 204 transitions, 1978 flow [2024-06-20 16:48:45,227 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 16:48:45,227 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 16:48:45,228 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 177 transitions. [2024-06-20 16:48:45,228 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42142857142857143 [2024-06-20 16:48:45,229 INFO L175 Difference]: Start difference. First operand has 108 places, 138 transitions, 1187 flow. Second operand 10 states and 177 transitions. [2024-06-20 16:48:45,229 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 117 places, 204 transitions, 1978 flow [2024-06-20 16:48:45,254 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 112 places, 204 transitions, 1939 flow, removed 8 selfloop flow, removed 5 redundant places. [2024-06-20 16:48:45,259 INFO L231 Difference]: Finished difference. Result has 114 places, 154 transitions, 1470 flow [2024-06-20 16:48:45,259 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1148, PETRI_DIFFERENCE_MINUEND_PLACES=103, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=138, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=49, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=84, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1470, PETRI_PLACES=114, PETRI_TRANSITIONS=154} [2024-06-20 16:48:45,260 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 71 predicate places. [2024-06-20 16:48:45,260 INFO L495 AbstractCegarLoop]: Abstraction has has 114 places, 154 transitions, 1470 flow [2024-06-20 16:48:45,260 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 16:48:45,260 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:48:45,261 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:48:45,261 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-06-20 16:48:45,262 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 16:48:45,263 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:48:45,263 INFO L85 PathProgramCache]: Analyzing trace with hash -1032612978, now seen corresponding path program 2 times [2024-06-20 16:48:45,263 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:48:45,263 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1335757026] [2024-06-20 16:48:45,263 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:48:45,263 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:48:45,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:48:48,097 INFO 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 16:48:48,097 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:48:48,097 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1335757026] [2024-06-20 16:48:48,097 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1335757026] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:48:48,097 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:48:48,097 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 16:48:48,098 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [566614922] [2024-06-20 16:48:48,098 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:48:48,098 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 16:48:48,098 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:48:48,098 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 16:48:48,098 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-20 16:48:48,110 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-20 16:48:48,111 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 114 places, 154 transitions, 1470 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 16:48:48,111 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:48:48,111 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-20 16:48:48,111 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:48:49,708 INFO L124 PetriNetUnfolderBase]: 2302/3469 cut-off events. [2024-06-20 16:48:49,709 INFO L125 PetriNetUnfolderBase]: For 49228/49232 co-relation queries the response was YES. [2024-06-20 16:48:49,719 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20269 conditions, 3469 events. 2302/3469 cut-off events. For 49228/49232 co-relation queries the response was YES. Maximal size of possible extension queue 165. Compared 17117 event pairs, 596 based on Foata normal form. 12/3480 useless extension candidates. Maximal degree in co-relation 20217. Up to 2408 conditions per place. [2024-06-20 16:48:49,728 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 131 selfloop transitions, 104 changer transitions 0/239 dead transitions. [2024-06-20 16:48:49,728 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 124 places, 239 transitions, 2615 flow [2024-06-20 16:48:49,729 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-20 16:48:49,729 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-20 16:48:49,731 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 214 transitions. [2024-06-20 16:48:49,731 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46320346320346323 [2024-06-20 16:48:49,731 INFO L175 Difference]: Start difference. First operand has 114 places, 154 transitions, 1470 flow. Second operand 11 states and 214 transitions. [2024-06-20 16:48:49,731 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 124 places, 239 transitions, 2615 flow [2024-06-20 16:48:49,770 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 118 places, 239 transitions, 2465 flow, removed 35 selfloop flow, removed 6 redundant places. [2024-06-20 16:48:49,772 INFO L231 Difference]: Finished difference. Result has 121 places, 171 transitions, 1812 flow [2024-06-20 16:48:49,772 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1320, PETRI_DIFFERENCE_MINUEND_PLACES=108, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=154, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=90, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=61, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=1812, PETRI_PLACES=121, PETRI_TRANSITIONS=171} [2024-06-20 16:48:49,773 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 78 predicate places. [2024-06-20 16:48:49,773 INFO L495 AbstractCegarLoop]: Abstraction has has 121 places, 171 transitions, 1812 flow [2024-06-20 16:48:49,773 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 16:48:49,773 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:48:49,773 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:48:49,774 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-06-20 16:48:49,774 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 16:48:49,774 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:48:49,774 INFO L85 PathProgramCache]: Analyzing trace with hash -1028583768, now seen corresponding path program 3 times [2024-06-20 16:48:49,774 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:48:49,774 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1432395968] [2024-06-20 16:48:49,774 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:48:49,774 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:48:49,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:48:52,939 INFO 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 16:48:52,939 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:48:52,939 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1432395968] [2024-06-20 16:48:52,939 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1432395968] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:48:52,939 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:48:52,940 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 16:48:52,940 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [375174818] [2024-06-20 16:48:52,940 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:48:52,940 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 16:48:52,941 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:48:52,941 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 16:48:52,942 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-20 16:48:52,966 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-20 16:48:52,967 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 121 places, 171 transitions, 1812 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 16:48:52,967 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:48:52,967 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-20 16:48:52,967 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:48:54,364 INFO L124 PetriNetUnfolderBase]: 2346/3531 cut-off events. [2024-06-20 16:48:54,364 INFO L125 PetriNetUnfolderBase]: For 57737/57741 co-relation queries the response was YES. [2024-06-20 16:48:54,377 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22015 conditions, 3531 events. 2346/3531 cut-off events. For 57737/57741 co-relation queries the response was YES. Maximal size of possible extension queue 172. Compared 17432 event pairs, 550 based on Foata normal form. 12/3542 useless extension candidates. Maximal degree in co-relation 21960. Up to 2445 conditions per place. [2024-06-20 16:48:54,390 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 117 selfloop transitions, 114 changer transitions 0/235 dead transitions. [2024-06-20 16:48:54,390 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 130 places, 235 transitions, 2784 flow [2024-06-20 16:48:54,391 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 16:48:54,391 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 16:48:54,391 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 191 transitions. [2024-06-20 16:48:54,391 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45476190476190476 [2024-06-20 16:48:54,392 INFO L175 Difference]: Start difference. First operand has 121 places, 171 transitions, 1812 flow. Second operand 10 states and 191 transitions. [2024-06-20 16:48:54,392 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 130 places, 235 transitions, 2784 flow [2024-06-20 16:48:54,450 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 125 places, 235 transitions, 2617 flow, removed 54 selfloop flow, removed 5 redundant places. [2024-06-20 16:48:54,453 INFO L231 Difference]: Finished difference. Result has 128 places, 180 transitions, 2100 flow [2024-06-20 16:48:54,453 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1659, PETRI_DIFFERENCE_MINUEND_PLACES=116, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=171, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=105, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=64, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2100, PETRI_PLACES=128, PETRI_TRANSITIONS=180} [2024-06-20 16:48:54,453 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 85 predicate places. [2024-06-20 16:48:54,454 INFO L495 AbstractCegarLoop]: Abstraction has has 128 places, 180 transitions, 2100 flow [2024-06-20 16:48:54,454 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 16:48:54,454 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:48:54,454 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:48:54,454 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2024-06-20 16:48:54,454 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 16:48:54,455 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:48:54,455 INFO L85 PathProgramCache]: Analyzing trace with hash 110061292, now seen corresponding path program 4 times [2024-06-20 16:48:54,455 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:48:54,455 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [286747500] [2024-06-20 16:48:54,455 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:48:54,455 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:48:54,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:48:56,992 INFO 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 16:48:56,992 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:48:56,992 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [286747500] [2024-06-20 16:48:56,992 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [286747500] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:48:56,992 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:48:56,992 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 16:48:56,993 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2011947053] [2024-06-20 16:48:56,993 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:48:56,993 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 16:48:56,993 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:48:56,993 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 16:48:56,993 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-20 16:48:57,024 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-20 16:48:57,024 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 128 places, 180 transitions, 2100 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 16:48:57,024 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:48:57,024 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-20 16:48:57,024 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:48:58,713 INFO L124 PetriNetUnfolderBase]: 2336/3515 cut-off events. [2024-06-20 16:48:58,713 INFO L125 PetriNetUnfolderBase]: For 60310/60318 co-relation queries the response was YES. [2024-06-20 16:48:58,726 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22799 conditions, 3515 events. 2336/3515 cut-off events. For 60310/60318 co-relation queries the response was YES. Maximal size of possible extension queue 173. Compared 17183 event pairs, 614 based on Foata normal form. 6/3519 useless extension candidates. Maximal degree in co-relation 22740. Up to 3009 conditions per place. [2024-06-20 16:48:58,738 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 181 selfloop transitions, 57 changer transitions 0/242 dead transitions. [2024-06-20 16:48:58,739 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 135 places, 242 transitions, 3115 flow [2024-06-20 16:48:58,740 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 16:48:58,740 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 16:48:58,740 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 141 transitions. [2024-06-20 16:48:58,740 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41964285714285715 [2024-06-20 16:48:58,740 INFO L175 Difference]: Start difference. First operand has 128 places, 180 transitions, 2100 flow. Second operand 8 states and 141 transitions. [2024-06-20 16:48:58,740 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 135 places, 242 transitions, 3115 flow [2024-06-20 16:48:58,807 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 129 places, 242 transitions, 2835 flow, removed 44 selfloop flow, removed 6 redundant places. [2024-06-20 16:48:58,810 INFO L231 Difference]: Finished difference. Result has 133 places, 208 transitions, 2429 flow [2024-06-20 16:48:58,810 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1874, PETRI_DIFFERENCE_MINUEND_PLACES=122, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=180, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=125, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2429, PETRI_PLACES=133, PETRI_TRANSITIONS=208} [2024-06-20 16:48:58,811 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 90 predicate places. [2024-06-20 16:48:58,811 INFO L495 AbstractCegarLoop]: Abstraction has has 133 places, 208 transitions, 2429 flow [2024-06-20 16:48:58,811 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 16:48:58,811 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:48:58,811 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:48:58,811 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2024-06-20 16:48:58,811 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 16:48:58,812 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:48:58,812 INFO L85 PathProgramCache]: Analyzing trace with hash 167520476, now seen corresponding path program 5 times [2024-06-20 16:48:58,812 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:48:58,812 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1921770038] [2024-06-20 16:48:58,812 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:48:58,813 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:48:58,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:49:01,825 INFO 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 16:49:01,826 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:49:01,826 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1921770038] [2024-06-20 16:49:01,826 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1921770038] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:49:01,826 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:49:01,826 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 16:49:01,826 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2094785329] [2024-06-20 16:49:01,826 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:49:01,828 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 16:49:01,828 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:49:01,828 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 16:49:01,829 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-20 16:49:01,863 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-20 16:49:01,863 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 133 places, 208 transitions, 2429 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 16:49:01,863 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:49:01,863 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-20 16:49:01,863 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:49:03,607 INFO L124 PetriNetUnfolderBase]: 2400/3623 cut-off events. [2024-06-20 16:49:03,607 INFO L125 PetriNetUnfolderBase]: For 66453/66461 co-relation queries the response was YES. [2024-06-20 16:49:03,619 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23627 conditions, 3623 events. 2400/3623 cut-off events. For 66453/66461 co-relation queries the response was YES. Maximal size of possible extension queue 180. Compared 17951 event pairs, 670 based on Foata normal form. 12/3633 useless extension candidates. Maximal degree in co-relation 23564. Up to 3046 conditions per place. [2024-06-20 16:49:03,629 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 182 selfloop transitions, 81 changer transitions 0/267 dead transitions. [2024-06-20 16:49:03,629 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 142 places, 267 transitions, 3411 flow [2024-06-20 16:49:03,632 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 16:49:03,632 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 16:49:03,632 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 185 transitions. [2024-06-20 16:49:03,632 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44047619047619047 [2024-06-20 16:49:03,632 INFO L175 Difference]: Start difference. First operand has 133 places, 208 transitions, 2429 flow. Second operand 10 states and 185 transitions. [2024-06-20 16:49:03,632 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 142 places, 267 transitions, 3411 flow [2024-06-20 16:49:03,693 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 140 places, 267 transitions, 3313 flow, removed 46 selfloop flow, removed 2 redundant places. [2024-06-20 16:49:03,696 INFO L231 Difference]: Finished difference. Result has 142 places, 216 transitions, 2684 flow [2024-06-20 16:49:03,696 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2347, PETRI_DIFFERENCE_MINUEND_PLACES=131, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=208, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=73, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=133, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2684, PETRI_PLACES=142, PETRI_TRANSITIONS=216} [2024-06-20 16:49:03,696 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 99 predicate places. [2024-06-20 16:49:03,696 INFO L495 AbstractCegarLoop]: Abstraction has has 142 places, 216 transitions, 2684 flow [2024-06-20 16:49:03,696 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 16:49:03,697 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:49:03,697 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:49:03,697 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2024-06-20 16:49:03,697 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 16:49:03,697 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:49:03,697 INFO L85 PathProgramCache]: Analyzing trace with hash 1822837286, now seen corresponding path program 6 times [2024-06-20 16:49:03,697 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:49:03,698 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1224696875] [2024-06-20 16:49:03,698 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:49:03,698 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:49:03,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:49:06,626 INFO 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 16:49:06,626 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:49:06,626 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1224696875] [2024-06-20 16:49:06,626 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1224696875] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:49:06,626 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:49:06,626 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 16:49:06,627 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1685271454] [2024-06-20 16:49:06,627 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:49:06,628 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 16:49:06,629 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:49:06,630 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 16:49:06,630 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-20 16:49:06,661 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-20 16:49:06,662 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 142 places, 216 transitions, 2684 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 16:49:06,662 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:49:06,662 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-20 16:49:06,662 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:49:08,262 INFO L124 PetriNetUnfolderBase]: 2412/3653 cut-off events. [2024-06-20 16:49:08,262 INFO L125 PetriNetUnfolderBase]: For 71306/71314 co-relation queries the response was YES. [2024-06-20 16:49:08,277 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24284 conditions, 3653 events. 2412/3653 cut-off events. For 71306/71314 co-relation queries the response was YES. Maximal size of possible extension queue 183. Compared 18186 event pairs, 652 based on Foata normal form. 12/3663 useless extension candidates. Maximal degree in co-relation 24217. Up to 3059 conditions per place. [2024-06-20 16:49:08,290 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 171 selfloop transitions, 84 changer transitions 0/259 dead transitions. [2024-06-20 16:49:08,290 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 150 places, 259 transitions, 3439 flow [2024-06-20 16:49:08,291 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 16:49:08,291 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 16:49:08,292 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 163 transitions. [2024-06-20 16:49:08,292 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4312169312169312 [2024-06-20 16:49:08,292 INFO L175 Difference]: Start difference. First operand has 142 places, 216 transitions, 2684 flow. Second operand 9 states and 163 transitions. [2024-06-20 16:49:08,292 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 150 places, 259 transitions, 3439 flow [2024-06-20 16:49:08,372 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 141 places, 259 transitions, 3093 flow, removed 69 selfloop flow, removed 9 redundant places. [2024-06-20 16:49:08,376 INFO L231 Difference]: Finished difference. Result has 142 places, 220 transitions, 2605 flow [2024-06-20 16:49:08,377 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2358, PETRI_DIFFERENCE_MINUEND_PLACES=133, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=216, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=80, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=135, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2605, PETRI_PLACES=142, PETRI_TRANSITIONS=220} [2024-06-20 16:49:08,377 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 99 predicate places. [2024-06-20 16:49:08,377 INFO L495 AbstractCegarLoop]: Abstraction has has 142 places, 220 transitions, 2605 flow [2024-06-20 16:49:08,377 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 16:49:08,377 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:49:08,377 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:49:08,378 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2024-06-20 16:49:08,378 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 16:49:08,378 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:49:08,378 INFO L85 PathProgramCache]: Analyzing trace with hash -535378222, now seen corresponding path program 1 times [2024-06-20 16:49:08,378 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:49:08,378 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [880811425] [2024-06-20 16:49:08,378 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:49:08,379 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:49:08,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:49:11,492 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 16:49:11,492 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:49:11,492 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [880811425] [2024-06-20 16:49:11,493 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [880811425] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:49:11,493 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:49:11,493 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 16:49:11,493 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1978674728] [2024-06-20 16:49:11,493 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:49:11,493 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 16:49:11,493 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:49:11,494 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 16:49:11,494 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-20 16:49:11,506 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-20 16:49:11,506 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 142 places, 220 transitions, 2605 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 16:49:11,506 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:49:11,506 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-20 16:49:11,506 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:49:12,912 INFO L124 PetriNetUnfolderBase]: 2481/3764 cut-off events. [2024-06-20 16:49:12,912 INFO L125 PetriNetUnfolderBase]: For 76871/76879 co-relation queries the response was YES. [2024-06-20 16:49:12,925 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24942 conditions, 3764 events. 2481/3764 cut-off events. For 76871/76879 co-relation queries the response was YES. Maximal size of possible extension queue 188. Compared 19034 event pairs, 505 based on Foata normal form. 14/3777 useless extension candidates. Maximal degree in co-relation 24875. Up to 3345 conditions per place. [2024-06-20 16:49:12,938 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 221 selfloop transitions, 47 changer transitions 0/272 dead transitions. [2024-06-20 16:49:12,939 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 150 places, 272 transitions, 3503 flow [2024-06-20 16:49:12,939 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 16:49:12,939 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 16:49:12,940 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 162 transitions. [2024-06-20 16:49:12,940 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42857142857142855 [2024-06-20 16:49:12,940 INFO L175 Difference]: Start difference. First operand has 142 places, 220 transitions, 2605 flow. Second operand 9 states and 162 transitions. [2024-06-20 16:49:12,940 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 150 places, 272 transitions, 3503 flow [2024-06-20 16:49:13,019 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 144 places, 272 transitions, 3296 flow, removed 30 selfloop flow, removed 6 redundant places. [2024-06-20 16:49:13,022 INFO L231 Difference]: Finished difference. Result has 145 places, 224 transitions, 2607 flow [2024-06-20 16:49:13,023 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2398, PETRI_DIFFERENCE_MINUEND_PLACES=136, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=220, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=45, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=175, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2607, PETRI_PLACES=145, PETRI_TRANSITIONS=224} [2024-06-20 16:49:13,023 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 102 predicate places. [2024-06-20 16:49:13,023 INFO L495 AbstractCegarLoop]: Abstraction has has 145 places, 224 transitions, 2607 flow [2024-06-20 16:49:13,023 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 16:49:13,023 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:49:13,024 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:49:13,024 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2024-06-20 16:49:13,024 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 16:49:13,024 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:49:13,024 INFO L85 PathProgramCache]: Analyzing trace with hash -1936793488, now seen corresponding path program 2 times [2024-06-20 16:49:13,024 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:49:13,024 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [262440198] [2024-06-20 16:49:13,024 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:49:13,025 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:49:13,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:49:16,254 INFO 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 16:49:16,255 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:49:16,255 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [262440198] [2024-06-20 16:49:16,255 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [262440198] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:49:16,255 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:49:16,255 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 16:49:16,256 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1861358598] [2024-06-20 16:49:16,256 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:49:16,258 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 16:49:16,258 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:49:16,258 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 16:49:16,259 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-20 16:49:16,269 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-20 16:49:16,270 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 145 places, 224 transitions, 2607 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 16:49:16,270 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:49:16,270 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-20 16:49:16,270 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:49:17,722 INFO L124 PetriNetUnfolderBase]: 2468/3745 cut-off events. [2024-06-20 16:49:17,722 INFO L125 PetriNetUnfolderBase]: For 79010/79018 co-relation queries the response was YES. [2024-06-20 16:49:17,736 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24691 conditions, 3745 events. 2468/3745 cut-off events. For 79010/79018 co-relation queries the response was YES. Maximal size of possible extension queue 186. Compared 18846 event pairs, 652 based on Foata normal form. 14/3758 useless extension candidates. Maximal degree in co-relation 24623. Up to 3445 conditions per place. [2024-06-20 16:49:17,748 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 216 selfloop transitions, 43 changer transitions 0/263 dead transitions. [2024-06-20 16:49:17,748 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 152 places, 263 transitions, 3257 flow [2024-06-20 16:49:17,749 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 16:49:17,749 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 16:49:17,756 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 143 transitions. [2024-06-20 16:49:17,757 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4255952380952381 [2024-06-20 16:49:17,757 INFO L175 Difference]: Start difference. First operand has 145 places, 224 transitions, 2607 flow. Second operand 8 states and 143 transitions. [2024-06-20 16:49:17,757 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 152 places, 263 transitions, 3257 flow [2024-06-20 16:49:17,845 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 147 places, 263 transitions, 3129 flow, removed 37 selfloop flow, removed 5 redundant places. [2024-06-20 16:49:17,848 INFO L231 Difference]: Finished difference. Result has 148 places, 224 transitions, 2576 flow [2024-06-20 16:49:17,848 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2479, PETRI_DIFFERENCE_MINUEND_PLACES=140, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=224, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=181, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2576, PETRI_PLACES=148, PETRI_TRANSITIONS=224} [2024-06-20 16:49:17,849 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 105 predicate places. [2024-06-20 16:49:17,849 INFO L495 AbstractCegarLoop]: Abstraction has has 148 places, 224 transitions, 2576 flow [2024-06-20 16:49:17,849 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 16:49:17,849 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:49:17,849 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:49:17,849 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2024-06-20 16:49:17,849 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 16:49:17,850 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:49:17,850 INFO L85 PathProgramCache]: Analyzing trace with hash -391745156, now seen corresponding path program 3 times [2024-06-20 16:49:17,850 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:49:17,850 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2890750] [2024-06-20 16:49:17,850 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:49:17,850 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:49:17,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:49:21,019 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:49:21,019 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:49:21,019 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2890750] [2024-06-20 16:49:21,019 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2890750] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:49:21,019 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:49:21,019 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 16:49:21,020 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1548596203] [2024-06-20 16:49:21,020 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:49:21,020 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 16:49:21,020 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:49:21,020 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 16:49:21,021 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-20 16:49:21,040 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-20 16:49:21,041 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 148 places, 224 transitions, 2576 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 16:49:21,041 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:49:21,041 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-20 16:49:21,041 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:49:22,604 INFO L124 PetriNetUnfolderBase]: 2496/3787 cut-off events. [2024-06-20 16:49:22,604 INFO L125 PetriNetUnfolderBase]: For 84416/84420 co-relation queries the response was YES. [2024-06-20 16:49:22,617 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25099 conditions, 3787 events. 2496/3787 cut-off events. For 84416/84420 co-relation queries the response was YES. Maximal size of possible extension queue 189. Compared 19153 event pairs, 664 based on Foata normal form. 8/3794 useless extension candidates. Maximal degree in co-relation 25029. Up to 3411 conditions per place. [2024-06-20 16:49:22,629 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 198 selfloop transitions, 60 changer transitions 0/262 dead transitions. [2024-06-20 16:49:22,629 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 155 places, 262 transitions, 3281 flow [2024-06-20 16:49:22,630 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 16:49:22,630 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 16:49:22,630 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 143 transitions. [2024-06-20 16:49:22,631 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4255952380952381 [2024-06-20 16:49:22,631 INFO L175 Difference]: Start difference. First operand has 148 places, 224 transitions, 2576 flow. Second operand 8 states and 143 transitions. [2024-06-20 16:49:22,631 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 155 places, 262 transitions, 3281 flow [2024-06-20 16:49:22,723 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 148 places, 262 transitions, 3185 flow, removed 1 selfloop flow, removed 7 redundant places. [2024-06-20 16:49:22,726 INFO L231 Difference]: Finished difference. Result has 149 places, 226 transitions, 2668 flow [2024-06-20 16:49:22,726 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2480, PETRI_DIFFERENCE_MINUEND_PLACES=141, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=224, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=58, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=164, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2668, PETRI_PLACES=149, PETRI_TRANSITIONS=226} [2024-06-20 16:49:22,727 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 106 predicate places. [2024-06-20 16:49:22,727 INFO L495 AbstractCegarLoop]: Abstraction has has 149 places, 226 transitions, 2668 flow [2024-06-20 16:49:22,727 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 16:49:22,727 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:49:22,727 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:49:22,727 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2024-06-20 16:49:22,727 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 16:49:22,728 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:49:22,728 INFO L85 PathProgramCache]: Analyzing trace with hash -1821317620, now seen corresponding path program 1 times [2024-06-20 16:49:22,728 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:49:22,728 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [353272611] [2024-06-20 16:49:22,728 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:49:22,728 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:49:22,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:49:26,018 INFO 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 16:49:26,019 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:49:26,019 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [353272611] [2024-06-20 16:49:26,019 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [353272611] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:49:26,019 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:49:26,019 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 16:49:26,019 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1509785989] [2024-06-20 16:49:26,019 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:49:26,019 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 16:49:26,019 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:49:26,020 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 16:49:26,020 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-20 16:49:26,034 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-20 16:49:26,034 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 149 places, 226 transitions, 2668 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 16:49:26,034 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:49:26,034 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-20 16:49:26,034 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:49:27,636 INFO L124 PetriNetUnfolderBase]: 2584/3895 cut-off events. [2024-06-20 16:49:27,636 INFO L125 PetriNetUnfolderBase]: For 97160/97170 co-relation queries the response was YES. [2024-06-20 16:49:27,653 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26124 conditions, 3895 events. 2584/3895 cut-off events. For 97160/97170 co-relation queries the response was YES. Maximal size of possible extension queue 190. Compared 19641 event pairs, 621 based on Foata normal form. 28/3922 useless extension candidates. Maximal degree in co-relation 26053. Up to 3414 conditions per place. [2024-06-20 16:49:27,668 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 221 selfloop transitions, 59 changer transitions 0/284 dead transitions. [2024-06-20 16:49:27,668 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 158 places, 284 transitions, 3568 flow [2024-06-20 16:49:27,669 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 16:49:27,669 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 16:49:27,669 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 186 transitions. [2024-06-20 16:49:27,670 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44285714285714284 [2024-06-20 16:49:27,670 INFO L175 Difference]: Start difference. First operand has 149 places, 226 transitions, 2668 flow. Second operand 10 states and 186 transitions. [2024-06-20 16:49:27,670 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 158 places, 284 transitions, 3568 flow [2024-06-20 16:49:27,775 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 152 places, 284 transitions, 3410 flow, removed 21 selfloop flow, removed 6 redundant places. [2024-06-20 16:49:27,778 INFO L231 Difference]: Finished difference. Result has 153 places, 229 transitions, 2710 flow [2024-06-20 16:49:27,779 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2510, PETRI_DIFFERENCE_MINUEND_PLACES=143, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=226, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=56, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=167, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2710, PETRI_PLACES=153, PETRI_TRANSITIONS=229} [2024-06-20 16:49:27,780 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 110 predicate places. [2024-06-20 16:49:27,780 INFO L495 AbstractCegarLoop]: Abstraction has has 153 places, 229 transitions, 2710 flow [2024-06-20 16:49:27,780 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 16:49:27,780 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:49:27,780 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:49:27,780 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2024-06-20 16:49:27,781 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 16:49:27,781 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:49:27,781 INFO L85 PathProgramCache]: Analyzing trace with hash -253459738, now seen corresponding path program 4 times [2024-06-20 16:49:27,781 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:49:27,781 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1836674598] [2024-06-20 16:49:27,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:49:27,781 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:49:27,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:49:30,686 INFO 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 16:49:30,687 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:49:30,687 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1836674598] [2024-06-20 16:49:30,687 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1836674598] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:49:30,687 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:49:30,687 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 16:49:30,687 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [112158098] [2024-06-20 16:49:30,687 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:49:30,688 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 16:49:30,688 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:49:30,689 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 16:49:30,689 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-20 16:49:30,704 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-20 16:49:30,705 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 153 places, 229 transitions, 2710 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 16:49:30,705 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:49:30,705 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-20 16:49:30,705 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:49:32,215 INFO L124 PetriNetUnfolderBase]: 2571/3906 cut-off events. [2024-06-20 16:49:32,216 INFO L125 PetriNetUnfolderBase]: For 95404/95412 co-relation queries the response was YES. [2024-06-20 16:49:32,234 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26313 conditions, 3906 events. 2571/3906 cut-off events. For 95404/95412 co-relation queries the response was YES. Maximal size of possible extension queue 192. Compared 19856 event pairs, 681 based on Foata normal form. 8/3912 useless extension candidates. Maximal degree in co-relation 26241. Up to 3532 conditions per place. [2024-06-20 16:49:32,248 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 200 selfloop transitions, 60 changer transitions 0/264 dead transitions. [2024-06-20 16:49:32,248 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 160 places, 264 transitions, 3419 flow [2024-06-20 16:49:32,249 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 16:49:32,249 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 16:49:32,249 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 139 transitions. [2024-06-20 16:49:32,249 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41369047619047616 [2024-06-20 16:49:32,249 INFO L175 Difference]: Start difference. First operand has 153 places, 229 transitions, 2710 flow. Second operand 8 states and 139 transitions. [2024-06-20 16:49:32,250 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 160 places, 264 transitions, 3419 flow [2024-06-20 16:49:32,366 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 152 places, 264 transitions, 3253 flow, removed 27 selfloop flow, removed 8 redundant places. [2024-06-20 16:49:32,369 INFO L231 Difference]: Finished difference. Result has 153 places, 231 transitions, 2738 flow [2024-06-20 16:49:32,369 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2544, PETRI_DIFFERENCE_MINUEND_PLACES=145, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=229, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=58, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=169, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2738, PETRI_PLACES=153, PETRI_TRANSITIONS=231} [2024-06-20 16:49:32,369 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 110 predicate places. [2024-06-20 16:49:32,370 INFO L495 AbstractCegarLoop]: Abstraction has has 153 places, 231 transitions, 2738 flow [2024-06-20 16:49:32,370 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 16:49:32,370 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:49:32,370 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:49:32,370 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2024-06-20 16:49:32,370 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:49:32,370 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:49:32,371 INFO L85 PathProgramCache]: Analyzing trace with hash 1126480346, now seen corresponding path program 2 times [2024-06-20 16:49:32,371 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:49:32,371 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1653900539] [2024-06-20 16:49:32,371 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:49:32,371 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:49:32,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:49:35,671 INFO 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 16:49:35,671 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:49:35,671 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1653900539] [2024-06-20 16:49:35,671 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1653900539] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:49:35,671 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:49:35,671 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 16:49:35,671 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1488772576] [2024-06-20 16:49:35,671 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:49:35,671 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 16:49:35,671 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:49:35,672 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 16:49:35,672 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-20 16:49:35,702 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-20 16:49:35,702 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 153 places, 231 transitions, 2738 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 16:49:35,702 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:49:35,702 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-20 16:49:35,702 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:49:37,231 INFO L124 PetriNetUnfolderBase]: 2591/3944 cut-off events. [2024-06-20 16:49:37,231 INFO L125 PetriNetUnfolderBase]: For 100393/100407 co-relation queries the response was YES. [2024-06-20 16:49:37,250 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26516 conditions, 3944 events. 2591/3944 cut-off events. For 100393/100407 co-relation queries the response was YES. Maximal size of possible extension queue 190. Compared 19991 event pairs, 623 based on Foata normal form. 18/3961 useless extension candidates. Maximal degree in co-relation 26443. Up to 3635 conditions per place. [2024-06-20 16:49:37,265 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 233 selfloop transitions, 30 changer transitions 0/267 dead transitions. [2024-06-20 16:49:37,265 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 160 places, 267 transitions, 3398 flow [2024-06-20 16:49:37,266 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 16:49:37,267 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 16:49:37,267 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 135 transitions. [2024-06-20 16:49:37,267 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4017857142857143 [2024-06-20 16:49:37,267 INFO L175 Difference]: Start difference. First operand has 153 places, 231 transitions, 2738 flow. Second operand 8 states and 135 transitions. [2024-06-20 16:49:37,267 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 160 places, 267 transitions, 3398 flow [2024-06-20 16:49:37,392 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 154 places, 267 transitions, 3236 flow, removed 23 selfloop flow, removed 6 redundant places. [2024-06-20 16:49:37,395 INFO L231 Difference]: Finished difference. Result has 155 places, 233 transitions, 2681 flow [2024-06-20 16:49:37,395 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2576, PETRI_DIFFERENCE_MINUEND_PLACES=147, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=231, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=201, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2681, PETRI_PLACES=155, PETRI_TRANSITIONS=233} [2024-06-20 16:49:37,396 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 112 predicate places. [2024-06-20 16:49:37,396 INFO L495 AbstractCegarLoop]: Abstraction has has 155 places, 233 transitions, 2681 flow [2024-06-20 16:49:37,396 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 16:49:37,396 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:49:37,396 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:49:37,396 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2024-06-20 16:49:37,396 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 16:49:37,397 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:49:37,397 INFO L85 PathProgramCache]: Analyzing trace with hash 909861164, now seen corresponding path program 3 times [2024-06-20 16:49:37,397 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:49:37,397 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2006995068] [2024-06-20 16:49:37,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:49:37,397 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:49:37,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:49:40,229 INFO 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 16:49:40,230 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:49:40,230 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2006995068] [2024-06-20 16:49:40,230 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2006995068] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:49:40,232 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:49:40,232 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 16:49:40,232 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [539328986] [2024-06-20 16:49:40,232 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:49:40,232 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 16:49:40,233 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:49:40,233 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 16:49:40,234 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-20 16:49:40,257 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-20 16:49:40,257 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 155 places, 233 transitions, 2681 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 16:49:40,257 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:49:40,257 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-20 16:49:40,257 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:49:41,821 INFO L124 PetriNetUnfolderBase]: 2611/3980 cut-off events. [2024-06-20 16:49:41,822 INFO L125 PetriNetUnfolderBase]: For 106034/106048 co-relation queries the response was YES. [2024-06-20 16:49:41,837 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26847 conditions, 3980 events. 2611/3980 cut-off events. For 106034/106048 co-relation queries the response was YES. Maximal size of possible extension queue 191. Compared 20309 event pairs, 587 based on Foata normal form. 18/3997 useless extension candidates. Maximal degree in co-relation 26773. Up to 3567 conditions per place. [2024-06-20 16:49:41,849 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 233 selfloop transitions, 37 changer transitions 0/274 dead transitions. [2024-06-20 16:49:41,849 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 162 places, 274 transitions, 3519 flow [2024-06-20 16:49:41,850 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 16:49:41,850 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 16:49:41,851 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 137 transitions. [2024-06-20 16:49:41,851 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40773809523809523 [2024-06-20 16:49:41,851 INFO L175 Difference]: Start difference. First operand has 155 places, 233 transitions, 2681 flow. Second operand 8 states and 137 transitions. [2024-06-20 16:49:41,851 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 162 places, 274 transitions, 3519 flow [2024-06-20 16:49:41,954 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 156 places, 274 transitions, 3432 flow, removed 15 selfloop flow, removed 6 redundant places. [2024-06-20 16:49:41,957 INFO L231 Difference]: Finished difference. Result has 158 places, 238 transitions, 2777 flow [2024-06-20 16:49:41,957 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2594, PETRI_DIFFERENCE_MINUEND_PLACES=149, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=233, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=198, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2777, PETRI_PLACES=158, PETRI_TRANSITIONS=238} [2024-06-20 16:49:41,962 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 115 predicate places. [2024-06-20 16:49:41,962 INFO L495 AbstractCegarLoop]: Abstraction has has 158 places, 238 transitions, 2777 flow [2024-06-20 16:49:41,962 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 16:49:41,962 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:49:41,962 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:49:41,962 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2024-06-20 16:49:41,962 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 16:49:41,963 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:49:41,963 INFO L85 PathProgramCache]: Analyzing trace with hash 673389134, now seen corresponding path program 4 times [2024-06-20 16:49:41,963 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:49:41,963 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1921958374] [2024-06-20 16:49:41,963 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:49:41,963 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:49:41,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:49:45,213 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:49:45,214 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:49:45,214 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1921958374] [2024-06-20 16:49:45,214 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1921958374] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:49:45,214 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:49:45,214 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 16:49:45,214 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1638637757] [2024-06-20 16:49:45,214 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:49:45,215 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 16:49:45,215 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:49:45,216 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 16:49:45,216 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-20 16:49:45,258 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-20 16:49:45,258 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 158 places, 238 transitions, 2777 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 16:49:45,258 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:49:45,259 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-20 16:49:45,259 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:49:46,848 INFO L124 PetriNetUnfolderBase]: 2671/4059 cut-off events. [2024-06-20 16:49:46,848 INFO L125 PetriNetUnfolderBase]: For 119054/119068 co-relation queries the response was YES. [2024-06-20 16:49:46,866 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27700 conditions, 4059 events. 2671/4059 cut-off events. For 119054/119068 co-relation queries the response was YES. Maximal size of possible extension queue 194. Compared 20756 event pairs, 649 based on Foata normal form. 32/4090 useless extension candidates. Maximal degree in co-relation 27624. Up to 3668 conditions per place. [2024-06-20 16:49:46,881 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 235 selfloop transitions, 45 changer transitions 0/284 dead transitions. [2024-06-20 16:49:46,881 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 166 places, 284 transitions, 3599 flow [2024-06-20 16:49:46,882 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 16:49:46,882 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 16:49:46,882 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 160 transitions. [2024-06-20 16:49:46,883 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42328042328042326 [2024-06-20 16:49:46,883 INFO L175 Difference]: Start difference. First operand has 158 places, 238 transitions, 2777 flow. Second operand 9 states and 160 transitions. [2024-06-20 16:49:46,883 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 166 places, 284 transitions, 3599 flow [2024-06-20 16:49:47,012 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 162 places, 284 transitions, 3500 flow, removed 32 selfloop flow, removed 4 redundant places. [2024-06-20 16:49:47,015 INFO L231 Difference]: Finished difference. Result has 163 places, 240 transitions, 2840 flow [2024-06-20 16:49:47,015 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2679, PETRI_DIFFERENCE_MINUEND_PLACES=154, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=238, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=193, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2840, PETRI_PLACES=163, PETRI_TRANSITIONS=240} [2024-06-20 16:49:47,016 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 120 predicate places. [2024-06-20 16:49:47,016 INFO L495 AbstractCegarLoop]: Abstraction has has 163 places, 240 transitions, 2840 flow [2024-06-20 16:49:47,016 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 16:49:47,016 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:49:47,016 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:49:47,017 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2024-06-20 16:49:47,017 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:49:47,018 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:49:47,019 INFO L85 PathProgramCache]: Analyzing trace with hash -941052290, now seen corresponding path program 1 times [2024-06-20 16:49:47,019 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:49:47,019 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [771734093] [2024-06-20 16:49:47,019 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:49:47,019 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:49:47,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:49:49,112 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:49:49,113 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:49:49,113 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [771734093] [2024-06-20 16:49:49,113 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [771734093] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:49:49,113 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:49:49,113 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 16:49:49,113 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1172218053] [2024-06-20 16:49:49,113 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:49:49,114 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 16:49:49,114 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:49:49,114 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 16:49:49,114 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-20 16:49:49,160 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-20 16:49:49,160 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 163 places, 240 transitions, 2840 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 16:49:49,160 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:49:49,160 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-20 16:49:49,161 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:49:50,334 INFO L124 PetriNetUnfolderBase]: 2419/3751 cut-off events. [2024-06-20 16:49:50,335 INFO L125 PetriNetUnfolderBase]: For 113428/113472 co-relation queries the response was YES. [2024-06-20 16:49:50,352 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26246 conditions, 3751 events. 2419/3751 cut-off events. For 113428/113472 co-relation queries the response was YES. Maximal size of possible extension queue 190. Compared 19734 event pairs, 653 based on Foata normal form. 16/3722 useless extension candidates. Maximal degree in co-relation 26168. Up to 3436 conditions per place. [2024-06-20 16:49:50,365 INFO L140 encePairwiseOnDemand]: 35/42 looper letters, 216 selfloop transitions, 10 changer transitions 0/254 dead transitions. [2024-06-20 16:49:50,365 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 167 places, 254 transitions, 3350 flow [2024-06-20 16:49:50,366 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-20 16:49:50,366 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-20 16:49:50,366 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 86 transitions. [2024-06-20 16:49:50,366 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4095238095238095 [2024-06-20 16:49:50,367 INFO L175 Difference]: Start difference. First operand has 163 places, 240 transitions, 2840 flow. Second operand 5 states and 86 transitions. [2024-06-20 16:49:50,367 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 167 places, 254 transitions, 3350 flow [2024-06-20 16:49:50,490 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 160 places, 254 transitions, 3211 flow, removed 28 selfloop flow, removed 7 redundant places. [2024-06-20 16:49:50,493 INFO L231 Difference]: Finished difference. Result has 161 places, 243 transitions, 2761 flow [2024-06-20 16:49:50,493 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2701, PETRI_DIFFERENCE_MINUEND_PLACES=156, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=240, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=230, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=2761, PETRI_PLACES=161, PETRI_TRANSITIONS=243} [2024-06-20 16:49:50,494 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 118 predicate places. [2024-06-20 16:49:50,494 INFO L495 AbstractCegarLoop]: Abstraction has has 161 places, 243 transitions, 2761 flow [2024-06-20 16:49:50,494 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 16:49:50,494 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:49:50,494 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 16:49:50,495 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2024-06-20 16:49:50,495 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 16:49:50,495 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:49:50,495 INFO L85 PathProgramCache]: Analyzing trace with hash 428638449, now seen corresponding path program 1 times [2024-06-20 16:49:50,495 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:49:50,495 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [416489452] [2024-06-20 16:49:50,495 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:49:50,495 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:49:50,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:49:53,779 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:49:53,779 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:49:53,779 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [416489452] [2024-06-20 16:49:53,779 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [416489452] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:49:53,780 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:49:53,780 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 16:49:53,780 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1249637704] [2024-06-20 16:49:53,780 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:49:53,780 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 16:49:53,780 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:49:53,781 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 16:49:53,781 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-20 16:49:53,803 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-20 16:49:53,803 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 161 places, 243 transitions, 2761 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 16:49:53,803 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:49:53,803 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-20 16:49:53,803 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:49:56,113 INFO L124 PetriNetUnfolderBase]: 3703/5727 cut-off events. [2024-06-20 16:49:56,113 INFO L125 PetriNetUnfolderBase]: For 226523/226531 co-relation queries the response was YES. [2024-06-20 16:49:56,139 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39715 conditions, 5727 events. 3703/5727 cut-off events. For 226523/226531 co-relation queries the response was YES. Maximal size of possible extension queue 262. Compared 32119 event pairs, 792 based on Foata normal form. 72/5798 useless extension candidates. Maximal degree in co-relation 39636. Up to 3301 conditions per place. [2024-06-20 16:49:56,157 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 258 selfloop transitions, 79 changer transitions 0/341 dead transitions. [2024-06-20 16:49:56,157 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 172 places, 341 transitions, 4395 flow [2024-06-20 16:49:56,158 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-20 16:49:56,158 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-20 16:49:56,158 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 230 transitions. [2024-06-20 16:49:56,158 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45634920634920634 [2024-06-20 16:49:56,158 INFO L175 Difference]: Start difference. First operand has 161 places, 243 transitions, 2761 flow. Second operand 12 states and 230 transitions. [2024-06-20 16:49:56,159 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 172 places, 341 transitions, 4395 flow [2024-06-20 16:49:56,368 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 169 places, 341 transitions, 4357 flow, removed 11 selfloop flow, removed 3 redundant places. [2024-06-20 16:49:56,372 INFO L231 Difference]: Finished difference. Result has 172 places, 251 transitions, 3115 flow [2024-06-20 16:49:56,372 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2723, PETRI_DIFFERENCE_MINUEND_PLACES=158, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=243, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=72, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=166, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=3115, PETRI_PLACES=172, PETRI_TRANSITIONS=251} [2024-06-20 16:49:56,372 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 129 predicate places. [2024-06-20 16:49:56,372 INFO L495 AbstractCegarLoop]: Abstraction has has 172 places, 251 transitions, 3115 flow [2024-06-20 16:49:56,373 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 16:49:56,373 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:49:56,373 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 16:49:56,373 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2024-06-20 16:49:56,373 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 16:49:56,373 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:49:56,373 INFO L85 PathProgramCache]: Analyzing trace with hash 517352079, now seen corresponding path program 2 times [2024-06-20 16:49:56,373 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:49:56,374 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1859080820] [2024-06-20 16:49:56,374 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:49:56,374 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:49:56,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:49:59,562 INFO 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 16:49:59,563 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:49:59,563 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1859080820] [2024-06-20 16:49:59,563 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1859080820] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:49:59,563 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:49:59,563 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 16:49:59,563 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1825633159] [2024-06-20 16:49:59,563 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:49:59,564 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 16:49:59,567 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:49:59,568 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 16:49:59,568 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-20 16:49:59,602 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-20 16:49:59,603 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 172 places, 251 transitions, 3115 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 16:49:59,603 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:49:59,603 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-20 16:49:59,603 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:50:01,722 INFO L124 PetriNetUnfolderBase]: 3974/6188 cut-off events. [2024-06-20 16:50:01,722 INFO L125 PetriNetUnfolderBase]: For 250702/250710 co-relation queries the response was YES. [2024-06-20 16:50:01,754 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42813 conditions, 6188 events. 3974/6188 cut-off events. For 250702/250710 co-relation queries the response was YES. Maximal size of possible extension queue 282. Compared 35558 event pairs, 1330 based on Foata normal form. 82/6269 useless extension candidates. Maximal degree in co-relation 42731. Up to 5123 conditions per place. [2024-06-20 16:50:01,776 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 234 selfloop transitions, 77 changer transitions 0/315 dead transitions. [2024-06-20 16:50:01,776 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 182 places, 315 transitions, 4205 flow [2024-06-20 16:50:01,777 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-20 16:50:01,777 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-20 16:50:01,777 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 199 transitions. [2024-06-20 16:50:01,777 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43073593073593075 [2024-06-20 16:50:01,778 INFO L175 Difference]: Start difference. First operand has 172 places, 251 transitions, 3115 flow. Second operand 11 states and 199 transitions. [2024-06-20 16:50:01,778 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 182 places, 315 transitions, 4205 flow [2024-06-20 16:50:02,021 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 175 places, 315 transitions, 4017 flow, removed 47 selfloop flow, removed 7 redundant places. [2024-06-20 16:50:02,025 INFO L231 Difference]: Finished difference. Result has 176 places, 253 transitions, 3174 flow [2024-06-20 16:50:02,025 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2933, PETRI_DIFFERENCE_MINUEND_PLACES=165, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=251, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=75, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=174, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=3174, PETRI_PLACES=176, PETRI_TRANSITIONS=253} [2024-06-20 16:50:02,026 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 133 predicate places. [2024-06-20 16:50:02,026 INFO L495 AbstractCegarLoop]: Abstraction has has 176 places, 253 transitions, 3174 flow [2024-06-20 16:50:02,026 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 16:50:02,026 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:50:02,027 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 16:50:02,027 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2024-06-20 16:50:02,027 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 16:50:02,027 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:50:02,027 INFO L85 PathProgramCache]: Analyzing trace with hash -770523833, now seen corresponding path program 3 times [2024-06-20 16:50:02,027 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:50:02,027 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1642142347] [2024-06-20 16:50:02,027 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:50:02,028 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:50:02,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:50:05,706 INFO 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 16:50:05,706 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:50:05,707 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1642142347] [2024-06-20 16:50:05,707 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1642142347] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:50:05,707 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:50:05,707 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 16:50:05,707 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2125112816] [2024-06-20 16:50:05,707 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:50:05,707 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 16:50:05,708 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:50:05,708 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 16:50:05,708 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-20 16:50:05,720 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-20 16:50:05,721 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 176 places, 253 transitions, 3174 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 16:50:05,721 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:50:05,721 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-20 16:50:05,721 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:50:08,061 INFO L124 PetriNetUnfolderBase]: 4094/6404 cut-off events. [2024-06-20 16:50:08,061 INFO L125 PetriNetUnfolderBase]: For 246836/246844 co-relation queries the response was YES. [2024-06-20 16:50:08,093 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42602 conditions, 6404 events. 4094/6404 cut-off events. For 246836/246844 co-relation queries the response was YES. Maximal size of possible extension queue 286. Compared 37410 event pairs, 1178 based on Foata normal form. 72/6475 useless extension candidates. Maximal degree in co-relation 42518. Up to 4322 conditions per place. [2024-06-20 16:50:08,112 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 247 selfloop transitions, 77 changer transitions 0/328 dead transitions. [2024-06-20 16:50:08,112 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 186 places, 328 transitions, 4479 flow [2024-06-20 16:50:08,113 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-20 16:50:08,113 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-20 16:50:08,116 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 204 transitions. [2024-06-20 16:50:08,126 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44155844155844154 [2024-06-20 16:50:08,126 INFO L175 Difference]: Start difference. First operand has 176 places, 253 transitions, 3174 flow. Second operand 11 states and 204 transitions. [2024-06-20 16:50:08,126 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 186 places, 328 transitions, 4479 flow [2024-06-20 16:50:08,419 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 177 places, 328 transitions, 4281 flow, removed 28 selfloop flow, removed 9 redundant places. [2024-06-20 16:50:08,423 INFO L231 Difference]: Finished difference. Result has 179 places, 258 transitions, 3304 flow [2024-06-20 16:50:08,423 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2976, PETRI_DIFFERENCE_MINUEND_PLACES=167, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=253, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=73, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=177, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=3304, PETRI_PLACES=179, PETRI_TRANSITIONS=258} [2024-06-20 16:50:08,424 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 136 predicate places. [2024-06-20 16:50:08,424 INFO L495 AbstractCegarLoop]: Abstraction has has 179 places, 258 transitions, 3304 flow [2024-06-20 16:50:08,424 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 16:50:08,424 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:50:08,424 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 16:50:08,424 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2024-06-20 16:50:08,424 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 16:50:08,425 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:50:08,425 INFO L85 PathProgramCache]: Analyzing trace with hash -203733097, now seen corresponding path program 4 times [2024-06-20 16:50:08,425 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:50:08,425 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [345374691] [2024-06-20 16:50:08,425 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:50:08,425 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:50:08,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:50:11,915 INFO 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 16:50:11,915 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:50:11,915 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [345374691] [2024-06-20 16:50:11,915 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [345374691] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:50:11,915 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:50:11,915 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 16:50:11,916 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1070525265] [2024-06-20 16:50:11,916 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:50:11,916 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 16:50:11,916 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:50:11,920 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 16:50:11,920 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-20 16:50:11,960 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-20 16:50:11,962 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 179 places, 258 transitions, 3304 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 16:50:11,962 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:50:11,962 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-20 16:50:11,962 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:50:14,309 INFO L124 PetriNetUnfolderBase]: 4406/6926 cut-off events. [2024-06-20 16:50:14,309 INFO L125 PetriNetUnfolderBase]: For 271672/271676 co-relation queries the response was YES. [2024-06-20 16:50:14,344 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45246 conditions, 6926 events. 4406/6926 cut-off events. For 271672/271676 co-relation queries the response was YES. Maximal size of possible extension queue 307. Compared 41632 event pairs, 1552 based on Foata normal form. 76/7001 useless extension candidates. Maximal degree in co-relation 45160. Up to 5232 conditions per place. [2024-06-20 16:50:14,363 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 185 selfloop transitions, 144 changer transitions 0/333 dead transitions. [2024-06-20 16:50:14,364 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 190 places, 333 transitions, 4480 flow [2024-06-20 16:50:14,364 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-20 16:50:14,364 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-20 16:50:14,366 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 234 transitions. [2024-06-20 16:50:14,366 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4642857142857143 [2024-06-20 16:50:14,366 INFO L175 Difference]: Start difference. First operand has 179 places, 258 transitions, 3304 flow. Second operand 12 states and 234 transitions. [2024-06-20 16:50:14,367 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 190 places, 333 transitions, 4480 flow [2024-06-20 16:50:14,676 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 183 places, 333 transitions, 4308 flow, removed 39 selfloop flow, removed 7 redundant places. [2024-06-20 16:50:14,680 INFO L231 Difference]: Finished difference. Result has 184 places, 260 transitions, 3511 flow [2024-06-20 16:50:14,680 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3132, PETRI_DIFFERENCE_MINUEND_PLACES=172, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=258, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=142, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=114, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=3511, PETRI_PLACES=184, PETRI_TRANSITIONS=260} [2024-06-20 16:50:14,681 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 141 predicate places. [2024-06-20 16:50:14,681 INFO L495 AbstractCegarLoop]: Abstraction has has 184 places, 260 transitions, 3511 flow [2024-06-20 16:50:14,681 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 16:50:14,681 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:50:14,681 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 16:50:14,681 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2024-06-20 16:50:14,681 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 16:50:14,682 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:50:14,682 INFO L85 PathProgramCache]: Analyzing trace with hash 1139010493, now seen corresponding path program 5 times [2024-06-20 16:50:14,682 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:50:14,682 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1851803013] [2024-06-20 16:50:14,682 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:50:14,682 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:50:14,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:50:18,040 INFO 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 16:50:18,041 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:50:18,041 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1851803013] [2024-06-20 16:50:18,041 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1851803013] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:50:18,041 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:50:18,041 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 16:50:18,041 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1466219527] [2024-06-20 16:50:18,041 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:50:18,042 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 16:50:18,042 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:50:18,042 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 16:50:18,042 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-20 16:50:18,111 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-20 16:50:18,111 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 184 places, 260 transitions, 3511 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 16:50:18,111 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:50:18,111 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-20 16:50:18,111 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:50:20,943 INFO L124 PetriNetUnfolderBase]: 5150/8142 cut-off events. [2024-06-20 16:50:20,944 INFO L125 PetriNetUnfolderBase]: For 343958/343962 co-relation queries the response was YES. [2024-06-20 16:50:20,996 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54809 conditions, 8142 events. 5150/8142 cut-off events. For 343958/343962 co-relation queries the response was YES. Maximal size of possible extension queue 364. Compared 50935 event pairs, 1707 based on Foata normal form. 66/8207 useless extension candidates. Maximal degree in co-relation 54721. Up to 5141 conditions per place. [2024-06-20 16:50:21,023 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 198 selfloop transitions, 146 changer transitions 0/348 dead transitions. [2024-06-20 16:50:21,024 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 195 places, 348 transitions, 5039 flow [2024-06-20 16:50:21,024 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-20 16:50:21,024 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-20 16:50:21,025 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 240 transitions. [2024-06-20 16:50:21,025 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47619047619047616 [2024-06-20 16:50:21,025 INFO L175 Difference]: Start difference. First operand has 184 places, 260 transitions, 3511 flow. Second operand 12 states and 240 transitions. [2024-06-20 16:50:21,025 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 195 places, 348 transitions, 5039 flow [2024-06-20 16:50:21,435 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 185 places, 348 transitions, 4686 flow, removed 36 selfloop flow, removed 10 redundant places. [2024-06-20 16:50:21,439 INFO L231 Difference]: Finished difference. Result has 187 places, 265 transitions, 3634 flow [2024-06-20 16:50:21,440 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3158, PETRI_DIFFERENCE_MINUEND_PLACES=174, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=260, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=142, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=115, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=3634, PETRI_PLACES=187, PETRI_TRANSITIONS=265} [2024-06-20 16:50:21,440 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 144 predicate places. [2024-06-20 16:50:21,440 INFO L495 AbstractCegarLoop]: Abstraction has has 187 places, 265 transitions, 3634 flow [2024-06-20 16:50:21,440 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 16:50:21,440 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:50:21,440 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 16:50:21,441 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2024-06-20 16:50:21,441 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 16:50:21,441 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:50:21,441 INFO L85 PathProgramCache]: Analyzing trace with hash -471671767, now seen corresponding path program 6 times [2024-06-20 16:50:21,441 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:50:21,441 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [158062213] [2024-06-20 16:50:21,441 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:50:21,442 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:50:21,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:50:24,764 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:50:24,765 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:50:24,765 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [158062213] [2024-06-20 16:50:24,765 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [158062213] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:50:24,765 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:50:24,765 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 16:50:24,765 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [160779782] [2024-06-20 16:50:24,765 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:50:24,766 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 16:50:24,766 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:50:24,766 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 16:50:24,767 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-20 16:50:24,822 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-20 16:50:24,822 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 187 places, 265 transitions, 3634 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 16:50:24,822 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:50:24,822 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-20 16:50:24,822 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:50:27,268 INFO L124 PetriNetUnfolderBase]: 5279/8373 cut-off events. [2024-06-20 16:50:27,268 INFO L125 PetriNetUnfolderBase]: For 345835/345839 co-relation queries the response was YES. [2024-06-20 16:50:27,313 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54439 conditions, 8373 events. 5279/8373 cut-off events. For 345835/345839 co-relation queries the response was YES. Maximal size of possible extension queue 389. Compared 53042 event pairs, 1977 based on Foata normal form. 76/8448 useless extension candidates. Maximal degree in co-relation 54349. Up to 6667 conditions per place. [2024-06-20 16:50:27,338 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 179 selfloop transitions, 148 changer transitions 0/331 dead transitions. [2024-06-20 16:50:27,338 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 197 places, 331 transitions, 4801 flow [2024-06-20 16:50:27,339 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-20 16:50:27,339 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-20 16:50:27,339 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 212 transitions. [2024-06-20 16:50:27,340 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4588744588744589 [2024-06-20 16:50:27,340 INFO L175 Difference]: Start difference. First operand has 187 places, 265 transitions, 3634 flow. Second operand 11 states and 212 transitions. [2024-06-20 16:50:27,340 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 197 places, 331 transitions, 4801 flow [2024-06-20 16:50:27,774 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 188 places, 331 transitions, 4458 flow, removed 56 selfloop flow, removed 9 redundant places. [2024-06-20 16:50:27,791 INFO L231 Difference]: Finished difference. Result has 189 places, 267 transitions, 3687 flow [2024-06-20 16:50:27,792 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3303, PETRI_DIFFERENCE_MINUEND_PLACES=178, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=265, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=146, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=117, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=3687, PETRI_PLACES=189, PETRI_TRANSITIONS=267} [2024-06-20 16:50:27,794 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 146 predicate places. [2024-06-20 16:50:27,794 INFO L495 AbstractCegarLoop]: Abstraction has has 189 places, 267 transitions, 3687 flow [2024-06-20 16:50:27,794 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 16:50:27,794 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:50:27,794 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 16:50:27,795 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2024-06-20 16:50:27,795 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 16:50:27,795 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:50:27,795 INFO L85 PathProgramCache]: Analyzing trace with hash -626270231, now seen corresponding path program 1 times [2024-06-20 16:50:27,795 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:50:27,795 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [98198299] [2024-06-20 16:50:27,795 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:50:27,796 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:50:27,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:50:31,869 INFO 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 16:50:31,870 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:50:31,870 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [98198299] [2024-06-20 16:50:31,870 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [98198299] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:50:31,870 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:50:31,870 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-20 16:50:31,870 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1299521252] [2024-06-20 16:50:31,870 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:50:31,872 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-20 16:50:31,872 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:50:31,872 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-20 16:50:31,872 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2024-06-20 16:50:31,942 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-20 16:50:31,943 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 189 places, 267 transitions, 3687 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 16:50:31,943 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:50:31,943 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-20 16:50:31,943 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:50:34,701 INFO L124 PetriNetUnfolderBase]: 5782/9234 cut-off events. [2024-06-20 16:50:34,701 INFO L125 PetriNetUnfolderBase]: For 393913/393917 co-relation queries the response was YES. [2024-06-20 16:50:34,753 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60508 conditions, 9234 events. 5782/9234 cut-off events. For 393913/393917 co-relation queries the response was YES. Maximal size of possible extension queue 456. Compared 60250 event pairs, 1952 based on Foata normal form. 56/9289 useless extension candidates. Maximal degree in co-relation 60417. Up to 5424 conditions per place. [2024-06-20 16:50:34,782 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 180 selfloop transitions, 157 changer transitions 0/341 dead transitions. [2024-06-20 16:50:34,782 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 199 places, 341 transitions, 5053 flow [2024-06-20 16:50:34,783 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-20 16:50:34,783 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-20 16:50:34,784 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 217 transitions. [2024-06-20 16:50:34,784 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4696969696969697 [2024-06-20 16:50:34,784 INFO L175 Difference]: Start difference. First operand has 189 places, 267 transitions, 3687 flow. Second operand 11 states and 217 transitions. [2024-06-20 16:50:34,784 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 199 places, 341 transitions, 5053 flow [2024-06-20 16:50:35,221 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 190 places, 341 transitions, 4702 flow, removed 31 selfloop flow, removed 9 redundant places. [2024-06-20 16:50:35,225 INFO L231 Difference]: Finished difference. Result has 191 places, 270 transitions, 3800 flow [2024-06-20 16:50:35,225 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3336, PETRI_DIFFERENCE_MINUEND_PLACES=180, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=267, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=155, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=111, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=3800, PETRI_PLACES=191, PETRI_TRANSITIONS=270} [2024-06-20 16:50:35,226 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 148 predicate places. [2024-06-20 16:50:35,226 INFO L495 AbstractCegarLoop]: Abstraction has has 191 places, 270 transitions, 3800 flow [2024-06-20 16:50:35,226 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 16:50:35,226 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:50:35,226 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 16:50:35,226 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2024-06-20 16:50:35,226 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 16:50:35,227 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:50:35,227 INFO L85 PathProgramCache]: Analyzing trace with hash -80244311, now seen corresponding path program 7 times [2024-06-20 16:50:35,227 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:50:35,227 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [200517683] [2024-06-20 16:50:35,227 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:50:35,227 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:50:35,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:50:38,967 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:50:38,968 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:50:38,968 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [200517683] [2024-06-20 16:50:38,968 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [200517683] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:50:38,968 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:50:38,968 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 16:50:38,968 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1547213339] [2024-06-20 16:50:38,968 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:50:38,969 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 16:50:38,969 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:50:38,970 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 16:50:38,970 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-20 16:50:38,988 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-20 16:50:38,988 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 191 places, 270 transitions, 3800 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 16:50:38,988 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:50:38,988 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-20 16:50:38,988 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:50:41,722 INFO L124 PetriNetUnfolderBase]: 6094/9756 cut-off events. [2024-06-20 16:50:41,723 INFO L125 PetriNetUnfolderBase]: For 432495/432503 co-relation queries the response was YES. [2024-06-20 16:50:41,780 INFO L83 FinitePrefix]: Finished finitePrefix Result has 63299 conditions, 9756 events. 6094/9756 cut-off events. For 432495/432503 co-relation queries the response was YES. Maximal size of possible extension queue 485. Compared 64897 event pairs, 2611 based on Foata normal form. 76/9830 useless extension candidates. Maximal degree in co-relation 63207. Up to 8575 conditions per place. [2024-06-20 16:50:41,809 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 234 selfloop transitions, 86 changer transitions 0/324 dead transitions. [2024-06-20 16:50:41,809 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 200 places, 324 transitions, 4786 flow [2024-06-20 16:50:41,810 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 16:50:41,810 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 16:50:41,816 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 185 transitions. [2024-06-20 16:50:41,816 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44047619047619047 [2024-06-20 16:50:41,817 INFO L175 Difference]: Start difference. First operand has 191 places, 270 transitions, 3800 flow. Second operand 10 states and 185 transitions. [2024-06-20 16:50:41,817 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 200 places, 324 transitions, 4786 flow [2024-06-20 16:50:42,426 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 192 places, 324 transitions, 4464 flow, removed 43 selfloop flow, removed 8 redundant places. [2024-06-20 16:50:42,429 INFO L231 Difference]: Finished difference. Result has 193 places, 272 transitions, 3753 flow [2024-06-20 16:50:42,430 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3480, PETRI_DIFFERENCE_MINUEND_PLACES=183, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=270, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=84, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=184, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3753, PETRI_PLACES=193, PETRI_TRANSITIONS=272} [2024-06-20 16:50:42,430 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 150 predicate places. [2024-06-20 16:50:42,430 INFO L495 AbstractCegarLoop]: Abstraction has has 193 places, 272 transitions, 3753 flow [2024-06-20 16:50:42,430 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 16:50:42,430 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:50:42,431 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 16:50:42,431 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2024-06-20 16:50:42,431 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 16:50:42,431 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:50:42,431 INFO L85 PathProgramCache]: Analyzing trace with hash -2124986329, now seen corresponding path program 8 times [2024-06-20 16:50:42,431 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:50:42,431 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [996862152] [2024-06-20 16:50:42,431 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:50:42,432 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:50:42,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:50:45,864 INFO 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 16:50:45,865 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:50:45,865 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [996862152] [2024-06-20 16:50:45,865 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [996862152] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:50:45,865 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:50:45,865 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 16:50:45,865 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1650935027] [2024-06-20 16:50:45,865 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:50:45,865 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 16:50:45,866 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:50:45,866 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 16:50:45,866 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-20 16:50:45,915 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-20 16:50:45,915 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 193 places, 272 transitions, 3753 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 16:50:45,915 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:50:45,915 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-20 16:50:45,915 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:50:48,964 INFO L124 PetriNetUnfolderBase]: 6182/9904 cut-off events. [2024-06-20 16:50:48,965 INFO L125 PetriNetUnfolderBase]: For 403271/403279 co-relation queries the response was YES. [2024-06-20 16:50:49,020 INFO L83 FinitePrefix]: Finished finitePrefix Result has 63977 conditions, 9904 events. 6182/9904 cut-off events. For 403271/403279 co-relation queries the response was YES. Maximal size of possible extension queue 486. Compared 65898 event pairs, 2624 based on Foata normal form. 22/9924 useless extension candidates. Maximal degree in co-relation 63884. Up to 9159 conditions per place. [2024-06-20 16:50:49,050 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 250 selfloop transitions, 61 changer transitions 0/315 dead transitions. [2024-06-20 16:50:49,050 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 201 places, 315 transitions, 4545 flow [2024-06-20 16:50:49,051 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 16:50:49,051 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 16:50:49,052 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 157 transitions. [2024-06-20 16:50:49,052 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41534391534391535 [2024-06-20 16:50:49,052 INFO L175 Difference]: Start difference. First operand has 193 places, 272 transitions, 3753 flow. Second operand 9 states and 157 transitions. [2024-06-20 16:50:49,052 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 201 places, 315 transitions, 4545 flow [2024-06-20 16:50:49,646 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 193 places, 315 transitions, 4306 flow, removed 37 selfloop flow, removed 8 redundant places. [2024-06-20 16:50:49,650 INFO L231 Difference]: Finished difference. Result has 194 places, 273 transitions, 3679 flow [2024-06-20 16:50:49,650 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3514, PETRI_DIFFERENCE_MINUEND_PLACES=185, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=272, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=60, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=211, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3679, PETRI_PLACES=194, PETRI_TRANSITIONS=273} [2024-06-20 16:50:49,650 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 151 predicate places. [2024-06-20 16:50:49,650 INFO L495 AbstractCegarLoop]: Abstraction has has 194 places, 273 transitions, 3679 flow [2024-06-20 16:50:49,651 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 16:50:49,651 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:50:49,651 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 16:50:49,651 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2024-06-20 16:50:49,651 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 16:50:49,651 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:50:49,651 INFO L85 PathProgramCache]: Analyzing trace with hash 2073425019, now seen corresponding path program 9 times [2024-06-20 16:50:49,651 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:50:49,652 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [685972237] [2024-06-20 16:50:49,652 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:50:49,652 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:50:49,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:50:53,169 INFO 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 16:50:53,169 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:50:53,169 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [685972237] [2024-06-20 16:50:53,169 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [685972237] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:50:53,170 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:50:53,170 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 16:50:53,170 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1640911769] [2024-06-20 16:50:53,170 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:50:53,170 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 16:50:53,170 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:50:53,170 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 16:50:53,170 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-20 16:50:53,217 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-20 16:50:53,218 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 194 places, 273 transitions, 3679 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 16:50:53,218 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:50:53,218 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-20 16:50:53,218 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:50:56,232 INFO L124 PetriNetUnfolderBase]: 6494/10440 cut-off events. [2024-06-20 16:50:56,232 INFO L125 PetriNetUnfolderBase]: For 465947/465955 co-relation queries the response was YES. [2024-06-20 16:50:56,295 INFO L83 FinitePrefix]: Finished finitePrefix Result has 66356 conditions, 10440 events. 6494/10440 cut-off events. For 465947/465955 co-relation queries the response was YES. Maximal size of possible extension queue 520. Compared 70585 event pairs, 2796 based on Foata normal form. 76/10514 useless extension candidates. Maximal degree in co-relation 66262. Up to 9247 conditions per place. [2024-06-20 16:50:56,327 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 247 selfloop transitions, 86 changer transitions 0/337 dead transitions. [2024-06-20 16:50:56,327 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 204 places, 337 transitions, 4811 flow [2024-06-20 16:50:56,328 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-20 16:50:56,328 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-20 16:50:56,328 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 206 transitions. [2024-06-20 16:50:56,329 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4458874458874459 [2024-06-20 16:50:56,329 INFO L175 Difference]: Start difference. First operand has 194 places, 273 transitions, 3679 flow. Second operand 11 states and 206 transitions. [2024-06-20 16:50:56,329 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 204 places, 337 transitions, 4811 flow [2024-06-20 16:50:56,867 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 197 places, 337 transitions, 4658 flow, removed 15 selfloop flow, removed 7 redundant places. [2024-06-20 16:50:56,871 INFO L231 Difference]: Finished difference. Result has 198 places, 275 transitions, 3809 flow [2024-06-20 16:50:56,871 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3530, PETRI_DIFFERENCE_MINUEND_PLACES=187, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=273, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=84, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=187, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=3809, PETRI_PLACES=198, PETRI_TRANSITIONS=275} [2024-06-20 16:50:56,871 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 155 predicate places. [2024-06-20 16:50:56,871 INFO L495 AbstractCegarLoop]: Abstraction has has 198 places, 275 transitions, 3809 flow [2024-06-20 16:50:56,872 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 16:50:56,872 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:50:56,872 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 16:50:56,872 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2024-06-20 16:50:56,872 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 16:50:56,872 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:50:56,872 INFO L85 PathProgramCache]: Analyzing trace with hash 2073277149, now seen corresponding path program 10 times [2024-06-20 16:50:56,873 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:50:56,873 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1806818131] [2024-06-20 16:50:56,873 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:50:56,873 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:50:56,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:51:00,469 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 16:51:00,470 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:51:00,470 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1806818131] [2024-06-20 16:51:00,470 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1806818131] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:51:00,470 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:51:00,470 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 16:51:00,470 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1228138935] [2024-06-20 16:51:00,470 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:51:00,471 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 16:51:00,471 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:51:00,471 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 16:51:00,471 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-20 16:51:00,535 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-20 16:51:00,535 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 198 places, 275 transitions, 3809 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 16:51:00,535 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:51:00,535 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-20 16:51:00,535 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:51:03,741 INFO L124 PetriNetUnfolderBase]: 6999/11263 cut-off events. [2024-06-20 16:51:03,742 INFO L125 PetriNetUnfolderBase]: For 525087/525095 co-relation queries the response was YES. [2024-06-20 16:51:03,812 INFO L83 FinitePrefix]: Finished finitePrefix Result has 72277 conditions, 11263 events. 6999/11263 cut-off events. For 525087/525095 co-relation queries the response was YES. Maximal size of possible extension queue 589. Compared 77440 event pairs, 2809 based on Foata normal form. 66/11327 useless extension candidates. Maximal degree in co-relation 72182. Up to 8534 conditions per place. [2024-06-20 16:51:03,845 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 257 selfloop transitions, 89 changer transitions 0/350 dead transitions. [2024-06-20 16:51:03,845 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 208 places, 350 transitions, 5189 flow [2024-06-20 16:51:03,846 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-20 16:51:03,846 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-20 16:51:03,846 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 211 transitions. [2024-06-20 16:51:03,847 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45670995670995673 [2024-06-20 16:51:03,847 INFO L175 Difference]: Start difference. First operand has 198 places, 275 transitions, 3809 flow. Second operand 11 states and 211 transitions. [2024-06-20 16:51:03,847 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 208 places, 350 transitions, 5189 flow [2024-06-20 16:51:04,587 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 199 places, 350 transitions, 4944 flow, removed 40 selfloop flow, removed 9 redundant places. [2024-06-20 16:51:04,591 INFO L231 Difference]: Finished difference. Result has 201 places, 280 transitions, 3953 flow [2024-06-20 16:51:04,592 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3564, PETRI_DIFFERENCE_MINUEND_PLACES=189, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=275, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=85, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=187, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=3953, PETRI_PLACES=201, PETRI_TRANSITIONS=280} [2024-06-20 16:51:04,592 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 158 predicate places. [2024-06-20 16:51:04,592 INFO L495 AbstractCegarLoop]: Abstraction has has 201 places, 280 transitions, 3953 flow [2024-06-20 16:51:04,592 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 16:51:04,592 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:51:04,592 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 16:51:04,593 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2024-06-20 16:51:04,593 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:51:04,593 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:51:04,593 INFO L85 PathProgramCache]: Analyzing trace with hash 842923743, now seen corresponding path program 2 times [2024-06-20 16:51:04,593 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:51:04,593 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [121047827] [2024-06-20 16:51:04,593 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:51:04,594 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:51:04,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:51:08,102 INFO 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 16:51:08,102 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:51:08,102 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [121047827] [2024-06-20 16:51:08,102 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [121047827] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:51:08,102 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:51:08,102 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 16:51:08,102 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1159474060] [2024-06-20 16:51:08,103 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:51:08,103 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 16:51:08,103 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:51:08,103 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 16:51:08,104 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-20 16:51:08,144 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-20 16:51:08,145 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 201 places, 280 transitions, 3953 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 16:51:08,145 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:51:08,145 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-20 16:51:08,145 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:51:11,042 INFO L124 PetriNetUnfolderBase]: 7047/11359 cut-off events. [2024-06-20 16:51:11,043 INFO L125 PetriNetUnfolderBase]: For 495749/495757 co-relation queries the response was YES. [2024-06-20 16:51:11,119 INFO L83 FinitePrefix]: Finished finitePrefix Result has 72829 conditions, 11359 events. 7047/11359 cut-off events. For 495749/495757 co-relation queries the response was YES. Maximal size of possible extension queue 590. Compared 78292 event pairs, 3134 based on Foata normal form. 14/11371 useless extension candidates. Maximal degree in co-relation 72732. Up to 10484 conditions per place. [2024-06-20 16:51:11,155 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 258 selfloop transitions, 63 changer transitions 0/325 dead transitions. [2024-06-20 16:51:11,155 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 209 places, 325 transitions, 4787 flow [2024-06-20 16:51:11,156 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 16:51:11,157 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 16:51:11,157 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 159 transitions. [2024-06-20 16:51:11,157 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42063492063492064 [2024-06-20 16:51:11,157 INFO L175 Difference]: Start difference. First operand has 201 places, 280 transitions, 3953 flow. Second operand 9 states and 159 transitions. [2024-06-20 16:51:11,157 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 209 places, 325 transitions, 4787 flow [2024-06-20 16:51:12,117 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 202 places, 325 transitions, 4559 flow, removed 60 selfloop flow, removed 7 redundant places. [2024-06-20 16:51:12,294 INFO L231 Difference]: Finished difference. Result has 203 places, 281 transitions, 3899 flow [2024-06-20 16:51:12,294 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3725, PETRI_DIFFERENCE_MINUEND_PLACES=194, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=280, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=62, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=217, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3899, PETRI_PLACES=203, PETRI_TRANSITIONS=281} [2024-06-20 16:51:12,294 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 160 predicate places. [2024-06-20 16:51:12,294 INFO L495 AbstractCegarLoop]: Abstraction has has 203 places, 281 transitions, 3899 flow [2024-06-20 16:51:12,295 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 16:51:12,295 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:51:12,295 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 16:51:12,295 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2024-06-20 16:51:12,295 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:51:12,295 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:51:12,295 INFO L85 PathProgramCache]: Analyzing trace with hash 213575627, now seen corresponding path program 3 times [2024-06-20 16:51:12,295 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:51:12,295 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1181337175] [2024-06-20 16:51:12,295 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:51:12,295 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:51:12,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:51:16,138 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:51:16,138 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:51:16,138 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1181337175] [2024-06-20 16:51:16,138 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1181337175] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:51:16,138 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:51:16,138 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-20 16:51:16,138 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [971140823] [2024-06-20 16:51:16,138 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:51:16,138 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-20 16:51:16,138 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:51:16,139 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-20 16:51:16,139 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2024-06-20 16:51:16,207 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-20 16:51:16,207 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 203 places, 281 transitions, 3899 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 16:51:16,207 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:51:16,207 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-20 16:51:16,207 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:51:19,455 INFO L124 PetriNetUnfolderBase]: 7259/11779 cut-off events. [2024-06-20 16:51:19,455 INFO L125 PetriNetUnfolderBase]: For 553200/553208 co-relation queries the response was YES. [2024-06-20 16:51:19,515 INFO L83 FinitePrefix]: Finished finitePrefix Result has 74465 conditions, 11779 events. 7259/11779 cut-off events. For 553200/553208 co-relation queries the response was YES. Maximal size of possible extension queue 618. Compared 82510 event pairs, 3084 based on Foata normal form. 56/11833 useless extension candidates. Maximal degree in co-relation 74366. Up to 9494 conditions per place. [2024-06-20 16:51:19,547 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 245 selfloop transitions, 92 changer transitions 0/341 dead transitions. [2024-06-20 16:51:19,547 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 212 places, 341 transitions, 4991 flow [2024-06-20 16:51:19,548 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 16:51:19,548 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 16:51:19,549 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 189 transitions. [2024-06-20 16:51:19,549 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45 [2024-06-20 16:51:19,550 INFO L175 Difference]: Start difference. First operand has 203 places, 281 transitions, 3899 flow. Second operand 10 states and 189 transitions. [2024-06-20 16:51:19,550 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 212 places, 341 transitions, 4991 flow [2024-06-20 16:51:20,227 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 205 places, 341 transitions, 4821 flow, removed 21 selfloop flow, removed 7 redundant places. [2024-06-20 16:51:20,231 INFO L231 Difference]: Finished difference. Result has 206 places, 283 transitions, 4031 flow [2024-06-20 16:51:20,231 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3733, PETRI_DIFFERENCE_MINUEND_PLACES=196, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=281, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=90, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=189, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=4031, PETRI_PLACES=206, PETRI_TRANSITIONS=283} [2024-06-20 16:51:20,232 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 163 predicate places. [2024-06-20 16:51:20,232 INFO L495 AbstractCegarLoop]: Abstraction has has 206 places, 283 transitions, 4031 flow [2024-06-20 16:51:20,232 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 16:51:20,232 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:51:20,233 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 16:51:20,233 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2024-06-20 16:51:20,233 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:51:20,233 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:51:20,233 INFO L85 PathProgramCache]: Analyzing trace with hash -398423465, now seen corresponding path program 4 times [2024-06-20 16:51:20,233 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:51:20,233 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [629156558] [2024-06-20 16:51:20,234 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:51:20,234 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:51:20,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:51:23,419 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:51:23,419 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:51:23,419 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [629156558] [2024-06-20 16:51:23,419 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [629156558] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:51:23,419 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:51:23,419 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 16:51:23,419 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1854203279] [2024-06-20 16:51:23,420 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:51:23,420 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 16:51:23,420 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:51:23,420 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 16:51:23,420 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-20 16:51:23,455 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-20 16:51:23,456 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 206 places, 283 transitions, 4031 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 16:51:23,456 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:51:23,456 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-20 16:51:23,456 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:51:26,519 INFO L124 PetriNetUnfolderBase]: 7239/11747 cut-off events. [2024-06-20 16:51:26,519 INFO L125 PetriNetUnfolderBase]: For 526313/526321 co-relation queries the response was YES. [2024-06-20 16:51:26,582 INFO L83 FinitePrefix]: Finished finitePrefix Result has 74246 conditions, 11747 events. 7239/11747 cut-off events. For 526313/526321 co-relation queries the response was YES. Maximal size of possible extension queue 618. Compared 81738 event pairs, 3223 based on Foata normal form. 14/11759 useless extension candidates. Maximal degree in co-relation 74146. Up to 9726 conditions per place. [2024-06-20 16:51:26,613 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 247 selfloop transitions, 75 changer transitions 0/326 dead transitions. [2024-06-20 16:51:26,613 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 213 places, 326 transitions, 4741 flow [2024-06-20 16:51:26,614 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 16:51:26,614 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 16:51:26,614 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 157 transitions. [2024-06-20 16:51:26,615 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41534391534391535 [2024-06-20 16:51:26,615 INFO L175 Difference]: Start difference. First operand has 206 places, 283 transitions, 4031 flow. Second operand 9 states and 157 transitions. [2024-06-20 16:51:26,615 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 213 places, 326 transitions, 4741 flow [2024-06-20 16:51:27,346 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 205 places, 326 transitions, 4471 flow, removed 45 selfloop flow, removed 8 redundant places. [2024-06-20 16:51:27,350 INFO L231 Difference]: Finished difference. Result has 206 places, 282 transitions, 3829 flow [2024-06-20 16:51:27,351 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3675, PETRI_DIFFERENCE_MINUEND_PLACES=197, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=282, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=75, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=207, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3829, PETRI_PLACES=206, PETRI_TRANSITIONS=282} [2024-06-20 16:51:27,351 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 163 predicate places. [2024-06-20 16:51:27,351 INFO L495 AbstractCegarLoop]: Abstraction has has 206 places, 282 transitions, 3829 flow [2024-06-20 16:51:27,351 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 16:51:27,351 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:51:27,351 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 16:51:27,352 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2024-06-20 16:51:27,352 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 16:51:27,352 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:51:27,352 INFO L85 PathProgramCache]: Analyzing trace with hash -1620461729, now seen corresponding path program 1 times [2024-06-20 16:51:27,352 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:51:27,352 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1702318375] [2024-06-20 16:51:27,352 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:51:27,352 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:51:27,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:51:30,421 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 16:51:30,422 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:51:30,422 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1702318375] [2024-06-20 16:51:30,422 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1702318375] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:51:30,422 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:51:30,422 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 16:51:30,422 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1097611859] [2024-06-20 16:51:30,422 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:51:30,423 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 16:51:30,423 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:51:30,424 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 16:51:30,424 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-20 16:51:30,448 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-20 16:51:30,448 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 206 places, 282 transitions, 3829 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 16:51:30,448 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:51:30,448 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-20 16:51:30,448 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:51:33,106 INFO L124 PetriNetUnfolderBase]: 6903/11234 cut-off events. [2024-06-20 16:51:33,107 INFO L125 PetriNetUnfolderBase]: For 531828/531882 co-relation queries the response was YES. [2024-06-20 16:51:33,170 INFO L83 FinitePrefix]: Finished finitePrefix Result has 72073 conditions, 11234 events. 6903/11234 cut-off events. For 531828/531882 co-relation queries the response was YES. Maximal size of possible extension queue 613. Compared 79337 event pairs, 3232 based on Foata normal form. 24/11130 useless extension candidates. Maximal degree in co-relation 71972. Up to 10775 conditions per place. [2024-06-20 16:51:33,204 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 235 selfloop transitions, 48 changer transitions 1/312 dead transitions. [2024-06-20 16:51:33,205 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 212 places, 312 transitions, 4595 flow [2024-06-20 16:51:33,205 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 16:51:33,205 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 16:51:33,206 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 118 transitions. [2024-06-20 16:51:33,207 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4013605442176871 [2024-06-20 16:51:33,207 INFO L175 Difference]: Start difference. First operand has 206 places, 282 transitions, 3829 flow. Second operand 7 states and 118 transitions. [2024-06-20 16:51:33,207 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 212 places, 312 transitions, 4595 flow [2024-06-20 16:51:33,910 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 202 places, 312 transitions, 4218 flow, removed 28 selfloop flow, removed 10 redundant places. [2024-06-20 16:51:33,913 INFO L231 Difference]: Finished difference. Result has 203 places, 291 transitions, 3704 flow [2024-06-20 16:51:33,914 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3462, PETRI_DIFFERENCE_MINUEND_PLACES=196, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=282, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=239, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3704, PETRI_PLACES=203, PETRI_TRANSITIONS=291} [2024-06-20 16:51:33,915 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 160 predicate places. [2024-06-20 16:51:33,915 INFO L495 AbstractCegarLoop]: Abstraction has has 203 places, 291 transitions, 3704 flow [2024-06-20 16:51:33,915 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 16:51:33,916 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:51:33,916 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 16:51:33,916 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2024-06-20 16:51:33,916 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 16:51:33,916 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:51:33,916 INFO L85 PathProgramCache]: Analyzing trace with hash 1886907325, now seen corresponding path program 2 times [2024-06-20 16:51:33,916 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:51:33,916 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [262787462] [2024-06-20 16:51:33,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:51:33,917 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:51:33,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:51:37,143 INFO 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 16:51:37,143 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:51:37,144 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [262787462] [2024-06-20 16:51:37,144 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [262787462] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:51:37,144 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:51:37,144 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 16:51:37,144 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [817759429] [2024-06-20 16:51:37,144 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:51:37,144 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 16:51:37,145 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:51:37,145 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 16:51:37,145 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-20 16:51:37,175 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-20 16:51:37,175 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 203 places, 291 transitions, 3704 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 16:51:37,175 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:51:37,176 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-20 16:51:37,176 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:51:39,845 INFO L124 PetriNetUnfolderBase]: 6885/11196 cut-off events. [2024-06-20 16:51:39,845 INFO L125 PetriNetUnfolderBase]: For 539505/539563 co-relation queries the response was YES. [2024-06-20 16:51:39,905 INFO L83 FinitePrefix]: Finished finitePrefix Result has 70426 conditions, 11196 events. 6885/11196 cut-off events. For 539505/539563 co-relation queries the response was YES. Maximal size of possible extension queue 613. Compared 79030 event pairs, 3170 based on Foata normal form. 19/11074 useless extension candidates. Maximal degree in co-relation 70328. Up to 10725 conditions per place. [2024-06-20 16:51:39,937 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 225 selfloop transitions, 55 changer transitions 0/308 dead transitions. [2024-06-20 16:51:39,937 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 208 places, 308 transitions, 4430 flow [2024-06-20 16:51:39,938 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-20 16:51:39,938 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-20 16:51:39,938 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 101 transitions. [2024-06-20 16:51:39,938 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4007936507936508 [2024-06-20 16:51:39,938 INFO L175 Difference]: Start difference. First operand has 203 places, 291 transitions, 3704 flow. Second operand 6 states and 101 transitions. [2024-06-20 16:51:39,938 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 208 places, 308 transitions, 4430 flow [2024-06-20 16:51:40,712 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 204 places, 308 transitions, 4347 flow, removed 16 selfloop flow, removed 4 redundant places. [2024-06-20 16:51:40,716 INFO L231 Difference]: Finished difference. Result has 205 places, 294 transitions, 3783 flow [2024-06-20 16:51:40,716 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3623, PETRI_DIFFERENCE_MINUEND_PLACES=199, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=291, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=52, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=236, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=3783, PETRI_PLACES=205, PETRI_TRANSITIONS=294} [2024-06-20 16:51:40,717 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 162 predicate places. [2024-06-20 16:51:40,717 INFO L495 AbstractCegarLoop]: Abstraction has has 205 places, 294 transitions, 3783 flow [2024-06-20 16:51:40,717 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 16:51:40,717 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:51:40,717 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 16:51:40,717 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2024-06-20 16:51:40,717 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 16:51:40,718 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:51:40,718 INFO L85 PathProgramCache]: Analyzing trace with hash 1886491615, now seen corresponding path program 3 times [2024-06-20 16:51:40,718 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:51:40,718 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1752128411] [2024-06-20 16:51:40,718 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:51:40,718 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:51:40,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:51:44,011 INFO 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 16:51:44,012 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:51:44,012 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1752128411] [2024-06-20 16:51:44,012 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1752128411] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:51:44,012 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:51:44,012 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 16:51:44,012 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2023700049] [2024-06-20 16:51:44,012 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:51:44,013 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 16:51:44,013 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:51:44,013 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 16:51:44,013 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-20 16:51:44,047 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-20 16:51:44,047 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 205 places, 294 transitions, 3783 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 16:51:44,047 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:51:44,047 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-20 16:51:44,047 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:51:46,600 INFO L124 PetriNetUnfolderBase]: 6876/11199 cut-off events. [2024-06-20 16:51:46,600 INFO L125 PetriNetUnfolderBase]: For 539986/540035 co-relation queries the response was YES. [2024-06-20 16:51:46,684 INFO L83 FinitePrefix]: Finished finitePrefix Result has 71600 conditions, 11199 events. 6876/11199 cut-off events. For 539986/540035 co-relation queries the response was YES. Maximal size of possible extension queue 613. Compared 79120 event pairs, 3229 based on Foata normal form. 15/11086 useless extension candidates. Maximal degree in co-relation 71502. Up to 10731 conditions per place. [2024-06-20 16:51:46,721 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 234 selfloop transitions, 51 changer transitions 0/313 dead transitions. [2024-06-20 16:51:46,722 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 210 places, 313 transitions, 4405 flow [2024-06-20 16:51:46,722 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-20 16:51:46,723 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-20 16:51:46,723 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 106 transitions. [2024-06-20 16:51:46,723 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42063492063492064 [2024-06-20 16:51:46,723 INFO L175 Difference]: Start difference. First operand has 205 places, 294 transitions, 3783 flow. Second operand 6 states and 106 transitions. [2024-06-20 16:51:46,723 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 210 places, 313 transitions, 4405 flow [2024-06-20 16:51:47,801 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 206 places, 313 transitions, 4255 flow, removed 22 selfloop flow, removed 4 redundant places. [2024-06-20 16:51:47,805 INFO L231 Difference]: Finished difference. Result has 207 places, 294 transitions, 3762 flow [2024-06-20 16:51:47,805 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3633, PETRI_DIFFERENCE_MINUEND_PLACES=201, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=294, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=51, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=243, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=3762, PETRI_PLACES=207, PETRI_TRANSITIONS=294} [2024-06-20 16:51:47,805 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 164 predicate places. [2024-06-20 16:51:47,806 INFO L495 AbstractCegarLoop]: Abstraction has has 207 places, 294 transitions, 3762 flow [2024-06-20 16:51:47,806 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 16:51:47,806 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:51:47,806 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 16:51:47,806 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2024-06-20 16:51:47,806 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 16:51:47,806 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:51:47,807 INFO L85 PathProgramCache]: Analyzing trace with hash 854117797, now seen corresponding path program 1 times [2024-06-20 16:51:47,807 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:51:47,807 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1976280261] [2024-06-20 16:51:47,807 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:51:47,807 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:51:47,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:51:50,090 INFO 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 16:51:50,090 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:51:50,090 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1976280261] [2024-06-20 16:51:50,090 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1976280261] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:51:50,091 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:51:50,091 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 16:51:50,091 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1717780022] [2024-06-20 16:51:50,091 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:51:50,091 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 16:51:50,091 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:51:50,091 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 16:51:50,092 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-20 16:51:50,109 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-20 16:51:50,109 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 207 places, 294 transitions, 3762 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 16:51:50,110 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:51:50,110 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-20 16:51:50,110 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:51:53,084 INFO L124 PetriNetUnfolderBase]: 7255/11776 cut-off events. [2024-06-20 16:51:53,084 INFO L125 PetriNetUnfolderBase]: For 563664/563666 co-relation queries the response was YES. [2024-06-20 16:51:53,152 INFO L83 FinitePrefix]: Finished finitePrefix Result has 74516 conditions, 11776 events. 7255/11776 cut-off events. For 563664/563666 co-relation queries the response was YES. Maximal size of possible extension queue 617. Compared 82563 event pairs, 3369 based on Foata normal form. 2/11777 useless extension candidates. Maximal degree in co-relation 74417. Up to 11385 conditions per place. [2024-06-20 16:51:53,185 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 302 selfloop transitions, 27 changer transitions 0/333 dead transitions. [2024-06-20 16:51:53,185 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 213 places, 333 transitions, 4940 flow [2024-06-20 16:51:53,186 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 16:51:53,186 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 16:51:53,186 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 124 transitions. [2024-06-20 16:51:53,186 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4217687074829932 [2024-06-20 16:51:53,187 INFO L175 Difference]: Start difference. First operand has 207 places, 294 transitions, 3762 flow. Second operand 7 states and 124 transitions. [2024-06-20 16:51:53,187 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 213 places, 333 transitions, 4940 flow [2024-06-20 16:51:53,930 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 208 places, 333 transitions, 4832 flow, removed 3 selfloop flow, removed 5 redundant places. [2024-06-20 16:51:53,934 INFO L231 Difference]: Finished difference. Result has 210 places, 305 transitions, 4001 flow [2024-06-20 16:51:53,934 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3658, PETRI_DIFFERENCE_MINUEND_PLACES=202, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=294, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=273, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4001, PETRI_PLACES=210, PETRI_TRANSITIONS=305} [2024-06-20 16:51:53,934 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 167 predicate places. [2024-06-20 16:51:53,934 INFO L495 AbstractCegarLoop]: Abstraction has has 210 places, 305 transitions, 4001 flow [2024-06-20 16:51:53,934 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 16:51:53,934 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:51:53,935 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 16:51:53,935 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2024-06-20 16:51:53,935 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 16:51:53,935 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:51:53,935 INFO L85 PathProgramCache]: Analyzing trace with hash 854237767, now seen corresponding path program 2 times [2024-06-20 16:51:53,935 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:51:53,935 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [800627655] [2024-06-20 16:51:53,935 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:51:53,936 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:51:53,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:51:56,139 INFO 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 16:51:56,139 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:51:56,139 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [800627655] [2024-06-20 16:51:56,139 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [800627655] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:51:56,139 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:51:56,139 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 16:51:56,140 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [957441616] [2024-06-20 16:51:56,140 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:51:56,140 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 16:51:56,140 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:51:56,140 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 16:51:56,140 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-20 16:51:56,159 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-20 16:51:56,160 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 210 places, 305 transitions, 4001 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 16:51:56,160 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:51:56,160 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-20 16:51:56,160 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:51:58,824 INFO L124 PetriNetUnfolderBase]: 7346/11903 cut-off events. [2024-06-20 16:51:58,824 INFO L125 PetriNetUnfolderBase]: For 585076/585078 co-relation queries the response was YES. [2024-06-20 16:51:58,906 INFO L83 FinitePrefix]: Finished finitePrefix Result has 77192 conditions, 11903 events. 7346/11903 cut-off events. For 585076/585078 co-relation queries the response was YES. Maximal size of possible extension queue 617. Compared 83365 event pairs, 3424 based on Foata normal form. 6/11908 useless extension candidates. Maximal degree in co-relation 77091. Up to 11564 conditions per place. [2024-06-20 16:51:58,944 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 310 selfloop transitions, 24 changer transitions 0/338 dead transitions. [2024-06-20 16:51:58,944 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 217 places, 338 transitions, 5046 flow [2024-06-20 16:51:58,945 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 16:51:58,945 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 16:51:58,945 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 125 transitions. [2024-06-20 16:51:58,946 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37202380952380953 [2024-06-20 16:51:58,946 INFO L175 Difference]: Start difference. First operand has 210 places, 305 transitions, 4001 flow. Second operand 8 states and 125 transitions. [2024-06-20 16:51:58,946 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 217 places, 338 transitions, 5046 flow [2024-06-20 16:52:00,098 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 215 places, 338 transitions, 4874 flow, removed 81 selfloop flow, removed 2 redundant places. [2024-06-20 16:52:00,102 INFO L231 Difference]: Finished difference. Result has 217 places, 316 transitions, 4134 flow [2024-06-20 16:52:00,102 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3869, PETRI_DIFFERENCE_MINUEND_PLACES=208, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=305, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=284, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4134, PETRI_PLACES=217, PETRI_TRANSITIONS=316} [2024-06-20 16:52:00,102 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 174 predicate places. [2024-06-20 16:52:00,102 INFO L495 AbstractCegarLoop]: Abstraction has has 217 places, 316 transitions, 4134 flow [2024-06-20 16:52:00,103 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 16:52:00,103 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:52:00,103 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 16:52:00,103 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2024-06-20 16:52:00,103 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 16:52:00,103 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:52:00,103 INFO L85 PathProgramCache]: Analyzing trace with hash 1021372507, now seen corresponding path program 1 times [2024-06-20 16:52:00,104 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:52:00,104 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1102728484] [2024-06-20 16:52:00,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:52:00,104 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:52:00,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:52:02,466 INFO 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 16:52:02,466 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:52:02,467 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1102728484] [2024-06-20 16:52:02,467 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1102728484] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:52:02,467 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:52:02,467 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 16:52:02,467 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1136393029] [2024-06-20 16:52:02,467 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:52:02,467 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 16:52:02,467 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:52:02,468 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 16:52:02,468 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-20 16:52:02,497 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-20 16:52:02,498 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 217 places, 316 transitions, 4134 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 16:52:02,498 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:52:02,498 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-20 16:52:02,498 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:52:05,492 INFO L124 PetriNetUnfolderBase]: 7320/11865 cut-off events. [2024-06-20 16:52:05,492 INFO L125 PetriNetUnfolderBase]: For 597334/597336 co-relation queries the response was YES. [2024-06-20 16:52:05,554 INFO L83 FinitePrefix]: Finished finitePrefix Result has 76985 conditions, 11865 events. 7320/11865 cut-off events. For 597334/597336 co-relation queries the response was YES. Maximal size of possible extension queue 617. Compared 83211 event pairs, 3425 based on Foata normal form. 6/11870 useless extension candidates. Maximal degree in co-relation 76881. Up to 11545 conditions per place. [2024-06-20 16:52:05,585 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 309 selfloop transitions, 24 changer transitions 0/337 dead transitions. [2024-06-20 16:52:05,585 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 224 places, 337 transitions, 4854 flow [2024-06-20 16:52:05,586 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 16:52:05,586 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 16:52:05,586 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 124 transitions. [2024-06-20 16:52:05,586 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36904761904761907 [2024-06-20 16:52:05,586 INFO L175 Difference]: Start difference. First operand has 217 places, 316 transitions, 4134 flow. Second operand 8 states and 124 transitions. [2024-06-20 16:52:05,587 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 224 places, 337 transitions, 4854 flow [2024-06-20 16:52:06,505 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 220 places, 337 transitions, 4700 flow, removed 60 selfloop flow, removed 4 redundant places. [2024-06-20 16:52:06,511 INFO L231 Difference]: Finished difference. Result has 221 places, 316 transitions, 4036 flow [2024-06-20 16:52:06,511 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3980, PETRI_DIFFERENCE_MINUEND_PLACES=213, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=316, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=292, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4036, PETRI_PLACES=221, PETRI_TRANSITIONS=316} [2024-06-20 16:52:06,511 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 178 predicate places. [2024-06-20 16:52:06,512 INFO L495 AbstractCegarLoop]: Abstraction has has 221 places, 316 transitions, 4036 flow [2024-06-20 16:52:06,512 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 16:52:06,512 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:52:06,512 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 16:52:06,512 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2024-06-20 16:52:06,512 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 16:52:06,512 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:52:06,513 INFO L85 PathProgramCache]: Analyzing trace with hash 1886913277, now seen corresponding path program 2 times [2024-06-20 16:52:06,513 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:52:06,513 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [748412266] [2024-06-20 16:52:06,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:52:06,513 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:52:06,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:52:08,829 INFO 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 16:52:08,829 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:52:08,829 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [748412266] [2024-06-20 16:52:08,829 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [748412266] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:52:08,829 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:52:08,830 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 16:52:08,830 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [669978876] [2024-06-20 16:52:08,830 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:52:08,830 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 16:52:08,830 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:52:08,830 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 16:52:08,830 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-20 16:52:08,840 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-20 16:52:08,840 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 221 places, 316 transitions, 4036 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 16:52:08,840 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:52:08,840 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-20 16:52:08,840 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:52:11,522 INFO L124 PetriNetUnfolderBase]: 7362/11924 cut-off events. [2024-06-20 16:52:11,522 INFO L125 PetriNetUnfolderBase]: For 617391/617395 co-relation queries the response was YES. [2024-06-20 16:52:11,606 INFO L83 FinitePrefix]: Finished finitePrefix Result has 77729 conditions, 11924 events. 7362/11924 cut-off events. For 617391/617395 co-relation queries the response was YES. Maximal size of possible extension queue 617. Compared 83329 event pairs, 3378 based on Foata normal form. 4/11927 useless extension candidates. Maximal degree in co-relation 77624. Up to 11493 conditions per place. [2024-06-20 16:52:11,641 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 303 selfloop transitions, 38 changer transitions 0/345 dead transitions. [2024-06-20 16:52:11,641 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 227 places, 345 transitions, 5074 flow [2024-06-20 16:52:11,642 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 16:52:11,642 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 16:52:11,643 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 118 transitions. [2024-06-20 16:52:11,643 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4013605442176871 [2024-06-20 16:52:11,643 INFO L175 Difference]: Start difference. First operand has 221 places, 316 transitions, 4036 flow. Second operand 7 states and 118 transitions. [2024-06-20 16:52:11,643 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 227 places, 345 transitions, 5074 flow [2024-06-20 16:52:12,740 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 220 places, 345 transitions, 5026 flow, removed 0 selfloop flow, removed 7 redundant places. [2024-06-20 16:52:12,744 INFO L231 Difference]: Finished difference. Result has 222 places, 322 transitions, 4194 flow [2024-06-20 16:52:12,744 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3988, PETRI_DIFFERENCE_MINUEND_PLACES=214, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=316, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=281, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4194, PETRI_PLACES=222, PETRI_TRANSITIONS=322} [2024-06-20 16:52:12,744 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 179 predicate places. [2024-06-20 16:52:12,745 INFO L495 AbstractCegarLoop]: Abstraction has has 222 places, 322 transitions, 4194 flow [2024-06-20 16:52:12,745 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 16:52:12,745 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:52:12,745 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 16:52:12,745 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2024-06-20 16:52:12,745 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 16:52:12,745 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:52:12,746 INFO L85 PathProgramCache]: Analyzing trace with hash 1886676127, now seen corresponding path program 3 times [2024-06-20 16:52:12,746 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:52:12,746 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1763582356] [2024-06-20 16:52:12,746 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:52:12,746 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:52:12,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:52:15,151 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:52:15,151 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:52:15,151 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1763582356] [2024-06-20 16:52:15,151 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1763582356] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:52:15,152 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:52:15,152 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 16:52:15,152 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [828932369] [2024-06-20 16:52:15,152 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:52:15,152 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 16:52:15,152 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:52:15,153 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 16:52:15,153 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-20 16:52:15,176 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-20 16:52:15,176 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 222 places, 322 transitions, 4194 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 16:52:15,176 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:52:15,176 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-20 16:52:15,176 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:52:17,957 INFO L124 PetriNetUnfolderBase]: 7352/11911 cut-off events. [2024-06-20 16:52:17,958 INFO L125 PetriNetUnfolderBase]: For 637146/637148 co-relation queries the response was YES. [2024-06-20 16:52:18,043 INFO L83 FinitePrefix]: Finished finitePrefix Result has 78026 conditions, 11911 events. 7352/11911 cut-off events. For 637146/637148 co-relation queries the response was YES. Maximal size of possible extension queue 617. Compared 83157 event pairs, 3372 based on Foata normal form. 6/11916 useless extension candidates. Maximal degree in co-relation 77919. Up to 11490 conditions per place. [2024-06-20 16:52:18,080 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 306 selfloop transitions, 39 changer transitions 0/349 dead transitions. [2024-06-20 16:52:18,080 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 229 places, 349 transitions, 5054 flow [2024-06-20 16:52:18,081 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 16:52:18,081 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 16:52:18,081 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 132 transitions. [2024-06-20 16:52:18,082 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39285714285714285 [2024-06-20 16:52:18,082 INFO L175 Difference]: Start difference. First operand has 222 places, 322 transitions, 4194 flow. Second operand 8 states and 132 transitions. [2024-06-20 16:52:18,082 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 229 places, 349 transitions, 5054 flow [2024-06-20 16:52:19,489 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 226 places, 349 transitions, 4949 flow, removed 37 selfloop flow, removed 3 redundant places. [2024-06-20 16:52:19,493 INFO L231 Difference]: Finished difference. Result has 227 places, 322 transitions, 4181 flow [2024-06-20 16:52:19,494 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4089, PETRI_DIFFERENCE_MINUEND_PLACES=219, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=322, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=283, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4181, PETRI_PLACES=227, PETRI_TRANSITIONS=322} [2024-06-20 16:52:19,494 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 184 predicate places. [2024-06-20 16:52:19,494 INFO L495 AbstractCegarLoop]: Abstraction has has 227 places, 322 transitions, 4181 flow [2024-06-20 16:52:19,494 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 16:52:19,494 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:52:19,495 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 16:52:19,495 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2024-06-20 16:52:19,495 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 16:52:19,496 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:52:19,496 INFO L85 PathProgramCache]: Analyzing trace with hash 1728414275, now seen corresponding path program 3 times [2024-06-20 16:52:19,496 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:52:19,496 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [277332273] [2024-06-20 16:52:19,496 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:52:19,496 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:52:19,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:52:22,002 INFO 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 16:52:22,002 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:52:22,002 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [277332273] [2024-06-20 16:52:22,002 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [277332273] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:52:22,002 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:52:22,003 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 16:52:22,003 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [737457090] [2024-06-20 16:52:22,003 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:52:22,004 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 16:52:22,004 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:52:22,005 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 16:52:22,005 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-20 16:52:22,020 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-20 16:52:22,020 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 227 places, 322 transitions, 4181 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 16:52:22,021 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:52:22,021 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-20 16:52:22,021 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:52:25,058 INFO L124 PetriNetUnfolderBase]: 7326/11875 cut-off events. [2024-06-20 16:52:25,059 INFO L125 PetriNetUnfolderBase]: For 653045/653047 co-relation queries the response was YES. [2024-06-20 16:52:25,149 INFO L83 FinitePrefix]: Finished finitePrefix Result has 77921 conditions, 11875 events. 7326/11875 cut-off events. For 653045/653047 co-relation queries the response was YES. Maximal size of possible extension queue 617. Compared 82926 event pairs, 3369 based on Foata normal form. 6/11880 useless extension candidates. Maximal degree in co-relation 77812. Up to 11471 conditions per place. [2024-06-20 16:52:25,190 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 304 selfloop transitions, 40 changer transitions 0/348 dead transitions. [2024-06-20 16:52:25,190 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 234 places, 348 transitions, 4937 flow [2024-06-20 16:52:25,191 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 16:52:25,191 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 16:52:25,191 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 130 transitions. [2024-06-20 16:52:25,191 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3869047619047619 [2024-06-20 16:52:25,191 INFO L175 Difference]: Start difference. First operand has 227 places, 322 transitions, 4181 flow. Second operand 8 states and 130 transitions. [2024-06-20 16:52:25,192 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 234 places, 348 transitions, 4937 flow [2024-06-20 16:52:26,251 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 226 places, 348 transitions, 4773 flow, removed 38 selfloop flow, removed 8 redundant places. [2024-06-20 16:52:26,255 INFO L231 Difference]: Finished difference. Result has 227 places, 322 transitions, 4116 flow [2024-06-20 16:52:26,255 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4017, PETRI_DIFFERENCE_MINUEND_PLACES=219, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=322, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=282, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4116, PETRI_PLACES=227, PETRI_TRANSITIONS=322} [2024-06-20 16:52:26,255 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 184 predicate places. [2024-06-20 16:52:26,256 INFO L495 AbstractCegarLoop]: Abstraction has has 227 places, 322 transitions, 4116 flow [2024-06-20 16:52:26,256 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 16:52:26,256 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:52:26,256 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 16:52:26,256 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2024-06-20 16:52:26,256 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 16:52:26,256 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:52:26,257 INFO L85 PathProgramCache]: Analyzing trace with hash 1886922205, now seen corresponding path program 1 times [2024-06-20 16:52:26,257 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:52:26,257 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1702275657] [2024-06-20 16:52:26,257 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:52:26,257 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:52:26,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:52:29,443 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:52:29,443 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:52:29,443 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1702275657] [2024-06-20 16:52:29,443 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1702275657] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:52:29,443 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:52:29,443 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 16:52:29,443 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [174173220] [2024-06-20 16:52:29,444 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:52:29,444 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 16:52:29,444 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:52:29,444 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 16:52:29,444 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-20 16:52:29,480 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-20 16:52:29,480 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 227 places, 322 transitions, 4116 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 16:52:29,480 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:52:29,480 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-20 16:52:29,480 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:52:32,186 INFO L124 PetriNetUnfolderBase]: 6984/11354 cut-off events. [2024-06-20 16:52:32,186 INFO L125 PetriNetUnfolderBase]: For 644485/644534 co-relation queries the response was YES. [2024-06-20 16:52:32,276 INFO L83 FinitePrefix]: Finished finitePrefix Result has 75713 conditions, 11354 events. 6984/11354 cut-off events. For 644485/644534 co-relation queries the response was YES. Maximal size of possible extension queue 613. Compared 80006 event pairs, 3274 based on Foata normal form. 13/11239 useless extension candidates. Maximal degree in co-relation 75604. Up to 10966 conditions per place. [2024-06-20 16:52:32,314 INFO L140 encePairwiseOnDemand]: 35/42 looper letters, 297 selfloop transitions, 12 changer transitions 0/337 dead transitions. [2024-06-20 16:52:32,315 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 232 places, 337 transitions, 4798 flow [2024-06-20 16:52:32,316 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-20 16:52:32,316 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-20 16:52:32,316 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 97 transitions. [2024-06-20 16:52:32,316 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38492063492063494 [2024-06-20 16:52:32,316 INFO L175 Difference]: Start difference. First operand has 227 places, 322 transitions, 4116 flow. Second operand 6 states and 97 transitions. [2024-06-20 16:52:32,316 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 232 places, 337 transitions, 4798 flow [2024-06-20 16:52:33,533 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 225 places, 337 transitions, 4716 flow, removed 1 selfloop flow, removed 7 redundant places. [2024-06-20 16:52:33,537 INFO L231 Difference]: Finished difference. Result has 226 places, 324 transitions, 4097 flow [2024-06-20 16:52:33,537 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4034, PETRI_DIFFERENCE_MINUEND_PLACES=220, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=322, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=310, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=4097, PETRI_PLACES=226, PETRI_TRANSITIONS=324} [2024-06-20 16:52:33,537 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 183 predicate places. [2024-06-20 16:52:33,537 INFO L495 AbstractCegarLoop]: Abstraction has has 226 places, 324 transitions, 4097 flow [2024-06-20 16:52:33,538 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 16:52:33,538 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:52:33,538 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 16:52:33,538 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2024-06-20 16:52:33,538 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 16:52:33,539 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:52:33,539 INFO L85 PathProgramCache]: Analyzing trace with hash 1038320982, now seen corresponding path program 1 times [2024-06-20 16:52:33,539 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:52:33,539 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1716076448] [2024-06-20 16:52:33,539 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:52:33,540 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:52:33,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:52:36,221 INFO 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 16:52:36,222 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:52:36,222 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1716076448] [2024-06-20 16:52:36,222 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1716076448] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:52:36,222 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:52:36,222 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 16:52:36,222 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [177814873] [2024-06-20 16:52:36,222 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:52:36,222 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 16:52:36,222 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:52:36,222 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 16:52:36,222 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-20 16:52:36,249 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-20 16:52:36,249 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 226 places, 324 transitions, 4097 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 16:52:36,249 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:52:36,249 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-20 16:52:36,249 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:52:39,681 INFO L124 PetriNetUnfolderBase]: 7309/11852 cut-off events. [2024-06-20 16:52:39,681 INFO L125 PetriNetUnfolderBase]: For 638513/638515 co-relation queries the response was YES. [2024-06-20 16:52:39,771 INFO L83 FinitePrefix]: Finished finitePrefix Result has 77266 conditions, 11852 events. 7309/11852 cut-off events. For 638513/638515 co-relation queries the response was YES. Maximal size of possible extension queue 617. Compared 82797 event pairs, 3366 based on Foata normal form. 4/11855 useless extension candidates. Maximal degree in co-relation 77156. Up to 11424 conditions per place. [2024-06-20 16:52:39,807 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 306 selfloop transitions, 43 changer transitions 0/353 dead transitions. [2024-06-20 16:52:39,807 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 233 places, 353 transitions, 4869 flow [2024-06-20 16:52:39,807 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 16:52:39,808 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 16:52:39,808 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 135 transitions. [2024-06-20 16:52:39,808 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4017857142857143 [2024-06-20 16:52:39,808 INFO L175 Difference]: Start difference. First operand has 226 places, 324 transitions, 4097 flow. Second operand 8 states and 135 transitions. [2024-06-20 16:52:39,808 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 233 places, 353 transitions, 4869 flow [2024-06-20 16:52:40,704 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 229 places, 353 transitions, 4802 flow, removed 23 selfloop flow, removed 4 redundant places. [2024-06-20 16:52:40,708 INFO L231 Difference]: Finished difference. Result has 230 places, 324 transitions, 4122 flow [2024-06-20 16:52:40,708 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4030, PETRI_DIFFERENCE_MINUEND_PLACES=222, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=324, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=281, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4122, PETRI_PLACES=230, PETRI_TRANSITIONS=324} [2024-06-20 16:52:40,709 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 187 predicate places. [2024-06-20 16:52:40,709 INFO L495 AbstractCegarLoop]: Abstraction has has 230 places, 324 transitions, 4122 flow [2024-06-20 16:52:40,709 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 16:52:40,709 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:52:40,709 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 16:52:40,709 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2024-06-20 16:52:40,709 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 16:52:40,710 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:52:40,710 INFO L85 PathProgramCache]: Analyzing trace with hash 1055934350, now seen corresponding path program 1 times [2024-06-20 16:52:40,710 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:52:40,710 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [653297988] [2024-06-20 16:52:40,710 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:52:40,710 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:52:40,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:52:43,949 INFO 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 16:52:43,949 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:52:43,949 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [653297988] [2024-06-20 16:52:43,949 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [653297988] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:52:43,949 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:52:43,949 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 16:52:43,949 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1206703036] [2024-06-20 16:52:43,950 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:52:43,950 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 16:52:43,950 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:52:43,950 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 16:52:43,951 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-20 16:52:43,967 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-20 16:52:43,972 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 230 places, 324 transitions, 4122 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 16:52:43,972 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:52:43,972 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-20 16:52:43,972 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:52:47,255 INFO L124 PetriNetUnfolderBase]: 7399/11943 cut-off events. [2024-06-20 16:52:47,256 INFO L125 PetriNetUnfolderBase]: For 672147/672155 co-relation queries the response was YES. [2024-06-20 16:52:47,349 INFO L83 FinitePrefix]: Finished finitePrefix Result has 79291 conditions, 11943 events. 7399/11943 cut-off events. For 672147/672155 co-relation queries the response was YES. Maximal size of possible extension queue 617. Compared 83189 event pairs, 3339 based on Foata normal form. 10/11952 useless extension candidates. Maximal degree in co-relation 79180. Up to 11356 conditions per place. [2024-06-20 16:52:47,386 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 305 selfloop transitions, 71 changer transitions 0/380 dead transitions. [2024-06-20 16:52:47,387 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 239 places, 380 transitions, 5474 flow [2024-06-20 16:52:47,387 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 16:52:47,388 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 16:52:47,388 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 175 transitions. [2024-06-20 16:52:47,388 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4166666666666667 [2024-06-20 16:52:47,388 INFO L175 Difference]: Start difference. First operand has 230 places, 324 transitions, 4122 flow. Second operand 10 states and 175 transitions. [2024-06-20 16:52:47,388 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 239 places, 380 transitions, 5474 flow [2024-06-20 16:52:48,279 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 230 places, 380 transitions, 5303 flow, removed 11 selfloop flow, removed 9 redundant places. [2024-06-20 16:52:48,283 INFO L231 Difference]: Finished difference. Result has 231 places, 333 transitions, 4301 flow [2024-06-20 16:52:48,284 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3951, PETRI_DIFFERENCE_MINUEND_PLACES=221, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=324, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=65, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=258, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=4301, PETRI_PLACES=231, PETRI_TRANSITIONS=333} [2024-06-20 16:52:48,284 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 188 predicate places. [2024-06-20 16:52:48,284 INFO L495 AbstractCegarLoop]: Abstraction has has 231 places, 333 transitions, 4301 flow [2024-06-20 16:52:48,285 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 16:52:48,285 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:52:48,285 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 16:52:48,285 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2024-06-20 16:52:48,285 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 16:52:48,285 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:52:48,285 INFO L85 PathProgramCache]: Analyzing trace with hash 1056054506, now seen corresponding path program 1 times [2024-06-20 16:52:48,285 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:52:48,286 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1312452071] [2024-06-20 16:52:48,286 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:52:48,286 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:52:48,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:52:52,228 INFO 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 16:52:52,229 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:52:52,229 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1312452071] [2024-06-20 16:52:52,229 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1312452071] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:52:52,229 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:52:52,229 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 16:52:52,229 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1328392793] [2024-06-20 16:52:52,229 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:52:52,229 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 16:52:52,229 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:52:52,230 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 16:52:52,230 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-20 16:52:52,256 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-20 16:52:52,256 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 231 places, 333 transitions, 4301 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 16:52:52,256 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:52:52,256 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-20 16:52:52,256 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:52:55,602 INFO L124 PetriNetUnfolderBase]: 7464/12060 cut-off events. [2024-06-20 16:52:55,602 INFO L125 PetriNetUnfolderBase]: For 709695/709703 co-relation queries the response was YES. [2024-06-20 16:52:55,694 INFO L83 FinitePrefix]: Finished finitePrefix Result has 81565 conditions, 12060 events. 7464/12060 cut-off events. For 709695/709703 co-relation queries the response was YES. Maximal size of possible extension queue 617. Compared 84192 event pairs, 3405 based on Foata normal form. 14/12073 useless extension candidates. Maximal degree in co-relation 81455. Up to 11667 conditions per place. [2024-06-20 16:52:55,733 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 324 selfloop transitions, 45 changer transitions 3/376 dead transitions. [2024-06-20 16:52:55,733 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 239 places, 376 transitions, 5289 flow [2024-06-20 16:52:55,734 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 16:52:55,734 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 16:52:55,734 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 146 transitions. [2024-06-20 16:52:55,734 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3862433862433862 [2024-06-20 16:52:55,734 INFO L175 Difference]: Start difference. First operand has 231 places, 333 transitions, 4301 flow. Second operand 9 states and 146 transitions. [2024-06-20 16:52:55,735 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 239 places, 376 transitions, 5289 flow [2024-06-20 16:52:56,966 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 234 places, 376 transitions, 5120 flow, removed 52 selfloop flow, removed 5 redundant places. [2024-06-20 16:52:56,971 INFO L231 Difference]: Finished difference. Result has 237 places, 343 transitions, 4392 flow [2024-06-20 16:52:56,971 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4141, PETRI_DIFFERENCE_MINUEND_PLACES=226, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=333, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=291, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4392, PETRI_PLACES=237, PETRI_TRANSITIONS=343} [2024-06-20 16:52:56,971 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 194 predicate places. [2024-06-20 16:52:56,971 INFO L495 AbstractCegarLoop]: Abstraction has has 237 places, 343 transitions, 4392 flow [2024-06-20 16:52:56,972 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 16:52:56,972 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:52:56,972 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 16:52:56,972 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2024-06-20 16:52:56,972 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 16:52:56,972 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:52:56,972 INFO L85 PathProgramCache]: Analyzing trace with hash 1233186026, now seen corresponding path program 2 times [2024-06-20 16:52:56,973 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:52:56,973 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [541837060] [2024-06-20 16:52:56,973 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:52:56,973 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:52:56,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:53:00,472 INFO 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 16:53:00,472 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:53:00,472 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [541837060] [2024-06-20 16:53:00,473 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [541837060] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:53:00,473 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:53:00,473 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 16:53:00,473 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1487817255] [2024-06-20 16:53:00,473 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:53:00,473 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 16:53:00,473 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:53:00,474 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 16:53:00,474 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-20 16:53:00,492 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-20 16:53:00,492 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 237 places, 343 transitions, 4392 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 16:53:00,493 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:53:00,493 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-20 16:53:00,493 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:53:03,778 INFO L124 PetriNetUnfolderBase]: 7620/12266 cut-off events. [2024-06-20 16:53:03,778 INFO L125 PetriNetUnfolderBase]: For 746272/746280 co-relation queries the response was YES. [2024-06-20 16:53:03,895 INFO L83 FinitePrefix]: Finished finitePrefix Result has 83726 conditions, 12266 events. 7620/12266 cut-off events. For 746272/746280 co-relation queries the response was YES. Maximal size of possible extension queue 617. Compared 85311 event pairs, 3401 based on Foata normal form. 14/12279 useless extension candidates. Maximal degree in co-relation 83612. Up to 11759 conditions per place. [2024-06-20 16:53:03,941 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 326 selfloop transitions, 71 changer transitions 1/402 dead transitions. [2024-06-20 16:53:03,941 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 246 places, 402 transitions, 5842 flow [2024-06-20 16:53:03,942 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 16:53:03,942 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 16:53:03,943 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 161 transitions. [2024-06-20 16:53:03,943 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38333333333333336 [2024-06-20 16:53:03,943 INFO L175 Difference]: Start difference. First operand has 237 places, 343 transitions, 4392 flow. Second operand 10 states and 161 transitions. [2024-06-20 16:53:03,943 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 246 places, 402 transitions, 5842 flow [2024-06-20 16:53:05,374 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 241 places, 402 transitions, 5735 flow, removed 7 selfloop flow, removed 5 redundant places. [2024-06-20 16:53:05,379 INFO L231 Difference]: Finished difference. Result has 244 places, 366 transitions, 4798 flow [2024-06-20 16:53:05,379 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4299, PETRI_DIFFERENCE_MINUEND_PLACES=232, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=343, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=50, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=281, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=4798, PETRI_PLACES=244, PETRI_TRANSITIONS=366} [2024-06-20 16:53:05,380 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 201 predicate places. [2024-06-20 16:53:05,380 INFO L495 AbstractCegarLoop]: Abstraction has has 244 places, 366 transitions, 4798 flow [2024-06-20 16:53:05,380 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 16:53:05,380 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:53:05,380 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 16:53:05,380 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57 [2024-06-20 16:53:05,380 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 16:53:05,381 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:53:05,381 INFO L85 PathProgramCache]: Analyzing trace with hash 1233423176, now seen corresponding path program 3 times [2024-06-20 16:53:05,381 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:53:05,381 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1917849548] [2024-06-20 16:53:05,381 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:53:05,381 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:53:05,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:53:08,741 INFO 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 16:53:08,741 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:53:08,741 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1917849548] [2024-06-20 16:53:08,741 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1917849548] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:53:08,741 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:53:08,741 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 16:53:08,741 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1858783581] [2024-06-20 16:53:08,742 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:53:08,742 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 16:53:08,742 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:53:08,742 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 16:53:08,742 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-20 16:53:08,774 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-20 16:53:08,774 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 244 places, 366 transitions, 4798 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 16:53:08,774 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:53:08,774 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-20 16:53:08,774 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:53:12,122 INFO L124 PetriNetUnfolderBase]: 7602/12249 cut-off events. [2024-06-20 16:53:12,122 INFO L125 PetriNetUnfolderBase]: For 762215/762223 co-relation queries the response was YES. [2024-06-20 16:53:12,232 INFO L83 FinitePrefix]: Finished finitePrefix Result has 84337 conditions, 12249 events. 7602/12249 cut-off events. For 762215/762223 co-relation queries the response was YES. Maximal size of possible extension queue 617. Compared 85178 event pairs, 3394 based on Foata normal form. 10/12258 useless extension candidates. Maximal degree in co-relation 84220. Up to 11748 conditions per place. [2024-06-20 16:53:12,276 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 321 selfloop transitions, 71 changer transitions 2/398 dead transitions. [2024-06-20 16:53:12,276 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 252 places, 398 transitions, 5812 flow [2024-06-20 16:53:12,277 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 16:53:12,277 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 16:53:12,277 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 145 transitions. [2024-06-20 16:53:12,277 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3835978835978836 [2024-06-20 16:53:12,277 INFO L175 Difference]: Start difference. First operand has 244 places, 366 transitions, 4798 flow. Second operand 9 states and 145 transitions. [2024-06-20 16:53:12,278 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 252 places, 398 transitions, 5812 flow [2024-06-20 16:53:13,523 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 249 places, 398 transitions, 5746 flow, removed 22 selfloop flow, removed 3 redundant places. [2024-06-20 16:53:13,528 INFO L231 Difference]: Finished difference. Result has 252 places, 367 transitions, 4927 flow [2024-06-20 16:53:13,528 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4732, PETRI_DIFFERENCE_MINUEND_PLACES=241, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=366, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=69, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=295, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4927, PETRI_PLACES=252, PETRI_TRANSITIONS=367} [2024-06-20 16:53:13,528 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 209 predicate places. [2024-06-20 16:53:13,529 INFO L495 AbstractCegarLoop]: Abstraction has has 252 places, 367 transitions, 4927 flow [2024-06-20 16:53:13,529 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 16:53:13,529 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:53:13,529 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:53:13,529 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58 [2024-06-20 16:53:13,529 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 16:53:13,529 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:53:13,529 INFO L85 PathProgramCache]: Analyzing trace with hash 1981977824, now seen corresponding path program 1 times [2024-06-20 16:53:13,530 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:53:13,530 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1191252115] [2024-06-20 16:53:13,530 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:53:13,530 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:53:13,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:53:17,824 INFO 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 16:53:17,824 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:53:17,824 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1191252115] [2024-06-20 16:53:17,825 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1191252115] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:53:17,825 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:53:17,825 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 16:53:17,825 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1703244047] [2024-06-20 16:53:17,825 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:53:17,825 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 16:53:17,825 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:53:17,826 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 16:53:17,826 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-20 16:53:17,872 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-20 16:53:17,872 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 252 places, 367 transitions, 4927 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 16:53:17,872 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:53:17,872 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-20 16:53:17,872 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:53:21,154 INFO L124 PetriNetUnfolderBase]: 7265/11762 cut-off events. [2024-06-20 16:53:21,154 INFO L125 PetriNetUnfolderBase]: For 813755/813810 co-relation queries the response was YES. [2024-06-20 16:53:21,254 INFO L83 FinitePrefix]: Finished finitePrefix Result has 82841 conditions, 11762 events. 7265/11762 cut-off events. For 813755/813810 co-relation queries the response was YES. Maximal size of possible extension queue 613. Compared 82696 event pairs, 3283 based on Foata normal form. 28/11655 useless extension candidates. Maximal degree in co-relation 82721. Up to 11166 conditions per place. [2024-06-20 16:53:21,294 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 302 selfloop transitions, 50 changer transitions 0/395 dead transitions. [2024-06-20 16:53:21,294 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 259 places, 395 transitions, 5759 flow [2024-06-20 16:53:21,295 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 16:53:21,295 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 16:53:21,295 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 133 transitions. [2024-06-20 16:53:21,296 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3958333333333333 [2024-06-20 16:53:21,296 INFO L175 Difference]: Start difference. First operand has 252 places, 367 transitions, 4927 flow. Second operand 8 states and 133 transitions. [2024-06-20 16:53:21,296 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 259 places, 395 transitions, 5759 flow [2024-06-20 16:53:22,847 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 254 places, 395 transitions, 5655 flow, removed 2 selfloop flow, removed 5 redundant places. [2024-06-20 16:53:22,851 INFO L231 Difference]: Finished difference. Result has 255 places, 369 transitions, 4973 flow [2024-06-20 16:53:22,851 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4823, PETRI_DIFFERENCE_MINUEND_PLACES=247, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=367, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=48, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=317, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4973, PETRI_PLACES=255, PETRI_TRANSITIONS=369} [2024-06-20 16:53:22,852 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 212 predicate places. [2024-06-20 16:53:22,852 INFO L495 AbstractCegarLoop]: Abstraction has has 255 places, 369 transitions, 4973 flow [2024-06-20 16:53:22,852 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 16:53:22,852 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:53:22,852 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:53:22,852 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59 [2024-06-20 16:53:22,852 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 16:53:22,853 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:53:22,853 INFO L85 PathProgramCache]: Analyzing trace with hash 1883838786, now seen corresponding path program 2 times [2024-06-20 16:53:22,853 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:53:22,853 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1272747078] [2024-06-20 16:53:22,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:53:22,853 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:53:22,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:53:25,776 INFO 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 16:53:25,776 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:53:25,776 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1272747078] [2024-06-20 16:53:25,776 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1272747078] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:53:25,776 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:53:25,776 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 16:53:25,777 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1558046128] [2024-06-20 16:53:25,777 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:53:25,777 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 16:53:25,777 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:53:25,777 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 16:53:25,777 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-20 16:53:25,796 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-20 16:53:25,796 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 255 places, 369 transitions, 4973 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 16:53:25,796 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:53:25,796 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-20 16:53:25,796 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:53:29,096 INFO L124 PetriNetUnfolderBase]: 7636/12310 cut-off events. [2024-06-20 16:53:29,096 INFO L125 PetriNetUnfolderBase]: For 810891/810903 co-relation queries the response was YES. [2024-06-20 16:53:29,223 INFO L83 FinitePrefix]: Finished finitePrefix Result has 85755 conditions, 12310 events. 7636/12310 cut-off events. For 810891/810903 co-relation queries the response was YES. Maximal size of possible extension queue 617. Compared 85772 event pairs, 3396 based on Foata normal form. 14/12323 useless extension candidates. Maximal degree in co-relation 85634. Up to 11789 conditions per place. [2024-06-20 16:53:29,266 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 332 selfloop transitions, 70 changer transitions 0/406 dead transitions. [2024-06-20 16:53:29,267 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 263 places, 406 transitions, 6091 flow [2024-06-20 16:53:29,267 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 16:53:29,267 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 16:53:29,268 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 149 transitions. [2024-06-20 16:53:29,268 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3941798941798942 [2024-06-20 16:53:29,268 INFO L175 Difference]: Start difference. First operand has 255 places, 369 transitions, 4973 flow. Second operand 9 states and 149 transitions. [2024-06-20 16:53:29,268 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 263 places, 406 transitions, 6091 flow [2024-06-20 16:53:30,529 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 257 places, 406 transitions, 5991 flow, removed 5 selfloop flow, removed 6 redundant places. [2024-06-20 16:53:30,533 INFO L231 Difference]: Finished difference. Result has 258 places, 372 transitions, 5125 flow [2024-06-20 16:53:30,534 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4873, PETRI_DIFFERENCE_MINUEND_PLACES=249, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=369, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=67, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=301, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5125, PETRI_PLACES=258, PETRI_TRANSITIONS=372} [2024-06-20 16:53:30,534 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 215 predicate places. [2024-06-20 16:53:30,535 INFO L495 AbstractCegarLoop]: Abstraction has has 258 places, 372 transitions, 5125 flow [2024-06-20 16:53:30,535 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 16:53:30,535 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:53:30,535 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 16:53:30,535 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60 [2024-06-20 16:53:30,535 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 16:53:30,537 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:53:30,537 INFO L85 PathProgramCache]: Analyzing trace with hash 571597696, now seen corresponding path program 4 times [2024-06-20 16:53:30,537 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:53:30,537 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1703967961] [2024-06-20 16:53:30,537 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:53:30,537 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:53:30,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:53:34,150 INFO 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 16:53:34,150 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:53:34,150 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1703967961] [2024-06-20 16:53:34,150 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1703967961] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:53:34,150 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:53:34,150 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 16:53:34,150 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1252057078] [2024-06-20 16:53:34,150 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:53:34,150 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 16:53:34,150 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:53:34,151 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 16:53:34,151 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-20 16:53:34,179 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-20 16:53:34,179 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 258 places, 372 transitions, 5125 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 16:53:34,179 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:53:34,179 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-20 16:53:34,179 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:53:37,496 INFO L124 PetriNetUnfolderBase]: 7610/12287 cut-off events. [2024-06-20 16:53:37,497 INFO L125 PetriNetUnfolderBase]: For 832707/832719 co-relation queries the response was YES. [2024-06-20 16:53:37,602 INFO L83 FinitePrefix]: Finished finitePrefix Result has 85744 conditions, 12287 events. 7610/12287 cut-off events. For 832707/832719 co-relation queries the response was YES. Maximal size of possible extension queue 617. Compared 85700 event pairs, 3426 based on Foata normal form. 18/12304 useless extension candidates. Maximal degree in co-relation 85622. Up to 11885 conditions per place. [2024-06-20 16:53:37,646 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 341 selfloop transitions, 52 changer transitions 3/400 dead transitions. [2024-06-20 16:53:37,647 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 266 places, 400 transitions, 5997 flow [2024-06-20 16:53:37,647 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 16:53:37,647 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 16:53:37,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 142 transitions. [2024-06-20 16:53:37,648 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37566137566137564 [2024-06-20 16:53:37,648 INFO L175 Difference]: Start difference. First operand has 258 places, 372 transitions, 5125 flow. Second operand 9 states and 142 transitions. [2024-06-20 16:53:37,648 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 266 places, 400 transitions, 5997 flow [2024-06-20 16:53:38,907 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 259 places, 400 transitions, 5727 flow, removed 57 selfloop flow, removed 7 redundant places. [2024-06-20 16:53:38,911 INFO L231 Difference]: Finished difference. Result has 260 places, 370 transitions, 4939 flow [2024-06-20 16:53:38,912 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4855, PETRI_DIFFERENCE_MINUEND_PLACES=251, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=372, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=52, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=320, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4939, PETRI_PLACES=260, PETRI_TRANSITIONS=370} [2024-06-20 16:53:38,912 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 217 predicate places. [2024-06-20 16:53:38,912 INFO L495 AbstractCegarLoop]: Abstraction has has 260 places, 370 transitions, 4939 flow [2024-06-20 16:53:38,912 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 16:53:38,912 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:53:38,913 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 16:53:38,913 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61 [2024-06-20 16:53:38,913 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 16:53:38,913 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:53:38,913 INFO L85 PathProgramCache]: Analyzing trace with hash 2111739936, now seen corresponding path program 3 times [2024-06-20 16:53:38,913 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:53:38,913 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [707151702] [2024-06-20 16:53:38,914 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:53:38,914 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:53:38,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:53:42,040 INFO 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 16:53:42,040 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:53:42,040 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [707151702] [2024-06-20 16:53:42,040 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [707151702] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:53:42,041 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:53:42,041 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 16:53:42,041 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [684690660] [2024-06-20 16:53:42,041 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:53:42,041 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 16:53:42,041 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:53:42,042 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 16:53:42,042 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-20 16:53:42,061 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-20 16:53:42,061 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 260 places, 370 transitions, 4939 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 16:53:42,061 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:53:42,061 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-20 16:53:42,062 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:53:45,513 INFO L124 PetriNetUnfolderBase]: 7660/12375 cut-off events. [2024-06-20 16:53:45,514 INFO L125 PetriNetUnfolderBase]: For 866954/866966 co-relation queries the response was YES. [2024-06-20 16:53:45,621 INFO L83 FinitePrefix]: Finished finitePrefix Result has 86876 conditions, 12375 events. 7660/12375 cut-off events. For 866954/866966 co-relation queries the response was YES. Maximal size of possible extension queue 617. Compared 86342 event pairs, 2897 based on Foata normal form. 14/12388 useless extension candidates. Maximal degree in co-relation 86753. Up to 11297 conditions per place. [2024-06-20 16:53:45,662 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 284 selfloop transitions, 137 changer transitions 0/425 dead transitions. [2024-06-20 16:53:45,663 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 267 places, 425 transitions, 6641 flow [2024-06-20 16:53:45,663 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 16:53:45,664 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 16:53:45,664 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 147 transitions. [2024-06-20 16:53:45,664 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4375 [2024-06-20 16:53:45,664 INFO L175 Difference]: Start difference. First operand has 260 places, 370 transitions, 4939 flow. Second operand 8 states and 147 transitions. [2024-06-20 16:53:45,664 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 267 places, 425 transitions, 6641 flow [2024-06-20 16:53:47,189 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 261 places, 425 transitions, 6532 flow, removed 1 selfloop flow, removed 6 redundant places. [2024-06-20 16:53:47,194 INFO L231 Difference]: Finished difference. Result has 264 places, 387 transitions, 5633 flow [2024-06-20 16:53:47,194 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4830, PETRI_DIFFERENCE_MINUEND_PLACES=254, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=370, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=124, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=243, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5633, PETRI_PLACES=264, PETRI_TRANSITIONS=387} [2024-06-20 16:53:47,194 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 221 predicate places. [2024-06-20 16:53:47,194 INFO L495 AbstractCegarLoop]: Abstraction has has 264 places, 387 transitions, 5633 flow [2024-06-20 16:53:47,195 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 16:53:47,195 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:53:47,195 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 16:53:47,195 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62 [2024-06-20 16:53:47,195 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 16:53:47,195 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:53:47,195 INFO L85 PathProgramCache]: Analyzing trace with hash 468507940, now seen corresponding path program 4 times [2024-06-20 16:53:47,196 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:53:47,196 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1215326523] [2024-06-20 16:53:47,196 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:53:47,196 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:53:47,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:53:50,129 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:53:50,130 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:53:50,130 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1215326523] [2024-06-20 16:53:50,130 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1215326523] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:53:50,130 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:53:50,130 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 16:53:50,130 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1392276618] [2024-06-20 16:53:50,131 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:53:50,131 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 16:53:50,131 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:53:50,135 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 16:53:50,135 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-20 16:53:50,157 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-20 16:53:50,158 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 264 places, 387 transitions, 5633 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 16:53:50,158 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:53:50,158 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-20 16:53:50,158 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:53:53,909 INFO L124 PetriNetUnfolderBase]: 7670/12391 cut-off events. [2024-06-20 16:53:53,909 INFO L125 PetriNetUnfolderBase]: For 909268/909280 co-relation queries the response was YES. [2024-06-20 16:53:53,998 INFO L83 FinitePrefix]: Finished finitePrefix Result has 89937 conditions, 12391 events. 7670/12391 cut-off events. For 909268/909280 co-relation queries the response was YES. Maximal size of possible extension queue 617. Compared 86462 event pairs, 2906 based on Foata normal form. 14/12404 useless extension candidates. Maximal degree in co-relation 89812. Up to 11303 conditions per place. [2024-06-20 16:53:54,039 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 278 selfloop transitions, 140 changer transitions 0/422 dead transitions. [2024-06-20 16:53:54,039 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 271 places, 422 transitions, 6910 flow [2024-06-20 16:53:54,040 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 16:53:54,040 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 16:53:54,040 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 140 transitions. [2024-06-20 16:53:54,040 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4166666666666667 [2024-06-20 16:53:54,041 INFO L175 Difference]: Start difference. First operand has 264 places, 387 transitions, 5633 flow. Second operand 8 states and 140 transitions. [2024-06-20 16:53:54,041 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 271 places, 422 transitions, 6910 flow [2024-06-20 16:53:55,450 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 270 places, 422 transitions, 6702 flow, removed 103 selfloop flow, removed 1 redundant places. [2024-06-20 16:53:55,455 INFO L231 Difference]: Finished difference. Result has 271 places, 390 transitions, 5824 flow [2024-06-20 16:53:55,455 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5451, PETRI_DIFFERENCE_MINUEND_PLACES=263, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=387, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=137, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=250, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5824, PETRI_PLACES=271, PETRI_TRANSITIONS=390} [2024-06-20 16:53:55,456 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 228 predicate places. [2024-06-20 16:53:55,456 INFO L495 AbstractCegarLoop]: Abstraction has has 271 places, 390 transitions, 5824 flow [2024-06-20 16:53:55,456 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 16:53:55,456 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:53:55,456 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 16:53:55,456 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63 [2024-06-20 16:53:55,456 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 16:53:55,457 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:53:55,457 INFO L85 PathProgramCache]: Analyzing trace with hash 583562146, now seen corresponding path program 5 times [2024-06-20 16:53:55,457 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:53:55,457 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1975326604] [2024-06-20 16:53:55,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:53:55,457 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:53:55,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:53:58,663 INFO 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 16:53:58,663 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:53:58,663 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1975326604] [2024-06-20 16:53:58,664 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1975326604] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:53:58,664 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:53:58,664 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 16:53:58,664 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [88694939] [2024-06-20 16:53:58,664 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:53:58,664 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 16:53:58,664 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:53:58,665 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 16:53:58,665 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-20 16:53:58,683 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-20 16:53:58,684 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 271 places, 390 transitions, 5824 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 16:53:58,684 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:53:58,684 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-20 16:53:58,684 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:54:01,912 INFO L124 PetriNetUnfolderBase]: 7735/12468 cut-off events. [2024-06-20 16:54:01,913 INFO L125 PetriNetUnfolderBase]: For 933937/933949 co-relation queries the response was YES. [2024-06-20 16:54:02,039 INFO L83 FinitePrefix]: Finished finitePrefix Result has 89935 conditions, 12468 events. 7735/12468 cut-off events. For 933937/933949 co-relation queries the response was YES. Maximal size of possible extension queue 617. Compared 86934 event pairs, 3458 based on Foata normal form. 18/12485 useless extension candidates. Maximal degree in co-relation 89807. Up to 12059 conditions per place. [2024-06-20 16:54:02,083 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 363 selfloop transitions, 55 changer transitions 3/425 dead transitions. [2024-06-20 16:54:02,084 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 279 places, 425 transitions, 6921 flow [2024-06-20 16:54:02,084 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 16:54:02,085 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 16:54:02,085 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 138 transitions. [2024-06-20 16:54:02,085 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36507936507936506 [2024-06-20 16:54:02,085 INFO L175 Difference]: Start difference. First operand has 271 places, 390 transitions, 5824 flow. Second operand 9 states and 138 transitions. [2024-06-20 16:54:02,085 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 279 places, 425 transitions, 6921 flow [2024-06-20 16:54:03,825 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 274 places, 425 transitions, 6614 flow, removed 37 selfloop flow, removed 5 redundant places. [2024-06-20 16:54:03,831 INFO L231 Difference]: Finished difference. Result has 276 places, 399 transitions, 5808 flow [2024-06-20 16:54:03,832 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5531, PETRI_DIFFERENCE_MINUEND_PLACES=266, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=390, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=338, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5808, PETRI_PLACES=276, PETRI_TRANSITIONS=399} [2024-06-20 16:54:03,832 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 233 predicate places. [2024-06-20 16:54:03,832 INFO L495 AbstractCegarLoop]: Abstraction has has 276 places, 399 transitions, 5808 flow [2024-06-20 16:54:03,832 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 16:54:03,832 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:54:03,833 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 16:54:03,833 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64 [2024-06-20 16:54:03,833 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 16:54:03,833 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:54:03,833 INFO L85 PathProgramCache]: Analyzing trace with hash 1894142256, now seen corresponding path program 5 times [2024-06-20 16:54:03,833 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:54:03,833 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [281634293] [2024-06-20 16:54:03,834 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:54:03,834 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:54:03,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:54:06,926 INFO 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 16:54:06,926 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:54:06,926 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [281634293] [2024-06-20 16:54:06,926 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [281634293] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:54:06,927 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:54:06,927 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 16:54:06,927 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1220955509] [2024-06-20 16:54:06,927 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:54:06,927 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 16:54:06,927 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:54:06,927 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 16:54:06,928 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-20 16:54:06,945 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-20 16:54:06,945 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 276 places, 399 transitions, 5808 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 16:54:06,945 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:54:06,945 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-20 16:54:06,945 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:54:10,321 INFO L124 PetriNetUnfolderBase]: 7821/12585 cut-off events. [2024-06-20 16:54:10,322 INFO L125 PetriNetUnfolderBase]: For 981475/981487 co-relation queries the response was YES. [2024-06-20 16:54:10,443 INFO L83 FinitePrefix]: Finished finitePrefix Result has 91295 conditions, 12585 events. 7821/12585 cut-off events. For 981475/981487 co-relation queries the response was YES. Maximal size of possible extension queue 617. Compared 87689 event pairs, 3446 based on Foata normal form. 18/12602 useless extension candidates. Maximal degree in co-relation 91165. Up to 11998 conditions per place. [2024-06-20 16:54:10,485 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 350 selfloop transitions, 84 changer transitions 0/438 dead transitions. [2024-06-20 16:54:10,485 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 284 places, 438 transitions, 7239 flow [2024-06-20 16:54:10,486 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 16:54:10,486 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 16:54:10,486 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 145 transitions. [2024-06-20 16:54:10,486 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3835978835978836 [2024-06-20 16:54:10,486 INFO L175 Difference]: Start difference. First operand has 276 places, 399 transitions, 5808 flow. Second operand 9 states and 145 transitions. [2024-06-20 16:54:10,487 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 284 places, 438 transitions, 7239 flow [2024-06-20 16:54:12,123 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 280 places, 438 transitions, 7144 flow, removed 12 selfloop flow, removed 4 redundant places. [2024-06-20 16:54:12,128 INFO L231 Difference]: Finished difference. Result has 283 places, 410 transitions, 6196 flow [2024-06-20 16:54:12,129 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5713, PETRI_DIFFERENCE_MINUEND_PLACES=272, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=399, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=73, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=315, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6196, PETRI_PLACES=283, PETRI_TRANSITIONS=410} [2024-06-20 16:54:12,129 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 240 predicate places. [2024-06-20 16:54:12,129 INFO L495 AbstractCegarLoop]: Abstraction has has 283 places, 410 transitions, 6196 flow [2024-06-20 16:54:12,129 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 16:54:12,129 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:54:12,130 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 16:54:12,130 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65 [2024-06-20 16:54:12,130 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 16:54:12,130 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:54:12,130 INFO L85 PathProgramCache]: Analyzing trace with hash 583977856, now seen corresponding path program 6 times [2024-06-20 16:54:12,130 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:54:12,130 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2001722114] [2024-06-20 16:54:12,131 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:54:12,131 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:54:12,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:54:15,202 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:54:15,202 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:54:15,202 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2001722114] [2024-06-20 16:54:15,202 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2001722114] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:54:15,202 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:54:15,202 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 16:54:15,202 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [628658839] [2024-06-20 16:54:15,202 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:54:15,202 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 16:54:15,202 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:54:15,202 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 16:54:15,203 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-20 16:54:15,235 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-20 16:54:15,236 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 283 places, 410 transitions, 6196 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 16:54:15,236 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:54:15,236 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-20 16:54:15,236 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:54:18,986 INFO L124 PetriNetUnfolderBase]: 7835/12604 cut-off events. [2024-06-20 16:54:18,987 INFO L125 PetriNetUnfolderBase]: For 1005304/1005316 co-relation queries the response was YES. [2024-06-20 16:54:19,080 INFO L83 FinitePrefix]: Finished finitePrefix Result has 92297 conditions, 12604 events. 7835/12604 cut-off events. For 1005304/1005316 co-relation queries the response was YES. Maximal size of possible extension queue 617. Compared 87804 event pairs, 3450 based on Foata normal form. 18/12621 useless extension candidates. Maximal degree in co-relation 92164. Up to 12011 conditions per place. [2024-06-20 16:54:19,118 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 350 selfloop transitions, 87 changer transitions 0/441 dead transitions. [2024-06-20 16:54:19,119 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 291 places, 441 transitions, 7466 flow [2024-06-20 16:54:19,119 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 16:54:19,119 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 16:54:19,120 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 145 transitions. [2024-06-20 16:54:19,120 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3835978835978836 [2024-06-20 16:54:19,120 INFO L175 Difference]: Start difference. First operand has 283 places, 410 transitions, 6196 flow. Second operand 9 states and 145 transitions. [2024-06-20 16:54:19,120 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 291 places, 441 transitions, 7466 flow [2024-06-20 16:54:20,758 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 286 places, 441 transitions, 7255 flow, removed 46 selfloop flow, removed 5 redundant places. [2024-06-20 16:54:20,763 INFO L231 Difference]: Finished difference. Result has 287 places, 413 transitions, 6234 flow [2024-06-20 16:54:20,763 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5992, PETRI_DIFFERENCE_MINUEND_PLACES=278, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=410, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=84, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=326, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6234, PETRI_PLACES=287, PETRI_TRANSITIONS=413} [2024-06-20 16:54:20,764 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 244 predicate places. [2024-06-20 16:54:20,764 INFO L495 AbstractCegarLoop]: Abstraction has has 287 places, 413 transitions, 6234 flow [2024-06-20 16:54:20,764 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 16:54:20,764 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:54:20,764 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 16:54:20,764 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66 [2024-06-20 16:54:20,764 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 16:54:20,765 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:54:20,765 INFO L85 PathProgramCache]: Analyzing trace with hash 442070464, now seen corresponding path program 7 times [2024-06-20 16:54:20,765 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:54:20,765 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [720660612] [2024-06-20 16:54:20,765 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:54:20,765 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:54:20,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:54:24,140 INFO 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 16:54:24,140 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:54:24,140 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [720660612] [2024-06-20 16:54:24,140 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [720660612] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:54:24,140 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:54:24,140 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 16:54:24,141 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1115121417] [2024-06-20 16:54:24,141 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:54:24,141 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 16:54:24,141 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:54:24,141 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 16:54:24,141 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-20 16:54:24,160 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-20 16:54:24,160 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 287 places, 413 transitions, 6234 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 16:54:24,160 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:54:24,160 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-20 16:54:24,160 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:54:27,685 INFO L124 PetriNetUnfolderBase]: 7833/12573 cut-off events. [2024-06-20 16:54:27,685 INFO L125 PetriNetUnfolderBase]: For 1029358/1029366 co-relation queries the response was YES. [2024-06-20 16:54:27,845 INFO L83 FinitePrefix]: Finished finitePrefix Result has 92301 conditions, 12573 events. 7833/12573 cut-off events. For 1029358/1029366 co-relation queries the response was YES. Maximal size of possible extension queue 617. Compared 87367 event pairs, 3423 based on Foata normal form. 14/12586 useless extension candidates. Maximal degree in co-relation 92167. Up to 11929 conditions per place. [2024-06-20 16:54:27,893 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 352 selfloop transitions, 102 changer transitions 1/459 dead transitions. [2024-06-20 16:54:27,893 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 295 places, 459 transitions, 7580 flow [2024-06-20 16:54:27,894 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 16:54:27,894 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 16:54:27,894 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 164 transitions. [2024-06-20 16:54:27,894 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43386243386243384 [2024-06-20 16:54:27,894 INFO L175 Difference]: Start difference. First operand has 287 places, 413 transitions, 6234 flow. Second operand 9 states and 164 transitions. [2024-06-20 16:54:27,895 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 295 places, 459 transitions, 7580 flow [2024-06-20 16:54:29,778 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 288 places, 459 transitions, 7354 flow, removed 27 selfloop flow, removed 7 redundant places. [2024-06-20 16:54:29,783 INFO L231 Difference]: Finished difference. Result has 289 places, 415 transitions, 6267 flow [2024-06-20 16:54:29,784 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6008, PETRI_DIFFERENCE_MINUEND_PLACES=280, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=413, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=100, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=313, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6267, PETRI_PLACES=289, PETRI_TRANSITIONS=415} [2024-06-20 16:54:29,784 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 246 predicate places. [2024-06-20 16:54:29,784 INFO L495 AbstractCegarLoop]: Abstraction has has 289 places, 415 transitions, 6267 flow [2024-06-20 16:54:29,784 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 16:54:29,784 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:54:29,784 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 16:54:29,785 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67 [2024-06-20 16:54:29,785 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 16:54:29,785 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:54:29,785 INFO L85 PathProgramCache]: Analyzing trace with hash -1152826262, now seen corresponding path program 8 times [2024-06-20 16:54:29,786 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:54:29,786 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1160865876] [2024-06-20 16:54:29,786 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:54:29,786 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:54:29,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:54:33,379 INFO 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 16:54:33,379 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:54:33,379 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1160865876] [2024-06-20 16:54:33,380 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1160865876] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:54:33,380 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:54:33,380 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 16:54:33,380 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1314519108] [2024-06-20 16:54:33,380 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:54:33,380 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 16:54:33,380 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:54:33,381 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 16:54:33,381 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-20 16:54:33,387 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-20 16:54:33,387 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 289 places, 415 transitions, 6267 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 16:54:33,387 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:54:33,387 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-20 16:54:33,387 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:54:36,655 INFO L124 PetriNetUnfolderBase]: 7707/12332 cut-off events. [2024-06-20 16:54:36,655 INFO L125 PetriNetUnfolderBase]: For 1044180/1044188 co-relation queries the response was YES. [2024-06-20 16:54:36,772 INFO L83 FinitePrefix]: Finished finitePrefix Result has 91436 conditions, 12332 events. 7707/12332 cut-off events. For 1044180/1044188 co-relation queries the response was YES. Maximal size of possible extension queue 598. Compared 84962 event pairs, 3314 based on Foata normal form. 10/12341 useless extension candidates. Maximal degree in co-relation 91301. Up to 11714 conditions per place. [2024-06-20 16:54:36,817 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 340 selfloop transitions, 100 changer transitions 3/447 dead transitions. [2024-06-20 16:54:36,818 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 296 places, 447 transitions, 7373 flow [2024-06-20 16:54:36,818 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 16:54:36,819 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 16:54:36,819 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 138 transitions. [2024-06-20 16:54:36,819 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4107142857142857 [2024-06-20 16:54:36,819 INFO L175 Difference]: Start difference. First operand has 289 places, 415 transitions, 6267 flow. Second operand 8 states and 138 transitions. [2024-06-20 16:54:36,819 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 296 places, 447 transitions, 7373 flow [2024-06-20 16:54:38,816 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 290 places, 447 transitions, 7194 flow, removed 7 selfloop flow, removed 6 redundant places. [2024-06-20 16:54:38,821 INFO L231 Difference]: Finished difference. Result has 291 places, 412 transitions, 6247 flow [2024-06-20 16:54:38,822 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6090, PETRI_DIFFERENCE_MINUEND_PLACES=283, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=415, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=100, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=315, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6247, PETRI_PLACES=291, PETRI_TRANSITIONS=412} [2024-06-20 16:54:38,822 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 248 predicate places. [2024-06-20 16:54:38,822 INFO L495 AbstractCegarLoop]: Abstraction has has 291 places, 412 transitions, 6247 flow [2024-06-20 16:54:38,822 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 16:54:38,822 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:54:38,822 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 16:54:38,823 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68 [2024-06-20 16:54:38,823 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 16:54:38,823 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:54:38,823 INFO L85 PathProgramCache]: Analyzing trace with hash 847518844, now seen corresponding path program 9 times [2024-06-20 16:54:38,823 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:54:38,823 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1685727983] [2024-06-20 16:54:38,823 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:54:38,824 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:54:38,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:54:42,036 INFO 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 16:54:42,036 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:54:42,037 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1685727983] [2024-06-20 16:54:42,037 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1685727983] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:54:42,037 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:54:42,037 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 16:54:42,037 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1071366159] [2024-06-20 16:54:42,037 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:54:42,037 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 16:54:42,037 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:54:42,038 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 16:54:42,038 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-20 16:54:42,050 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-20 16:54:42,050 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 291 places, 412 transitions, 6247 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 16:54:42,050 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:54:42,050 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-20 16:54:42,050 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:54:45,302 INFO L124 PetriNetUnfolderBase]: 7429/11889 cut-off events. [2024-06-20 16:54:45,302 INFO L125 PetriNetUnfolderBase]: For 1052516/1052542 co-relation queries the response was YES. [2024-06-20 16:54:45,414 INFO L83 FinitePrefix]: Finished finitePrefix Result has 90191 conditions, 11889 events. 7429/11889 cut-off events. For 1052516/1052542 co-relation queries the response was YES. Maximal size of possible extension queue 551. Compared 81142 event pairs, 2783 based on Foata normal form. 28/11916 useless extension candidates. Maximal degree in co-relation 90055. Up to 10867 conditions per place. [2024-06-20 16:54:45,458 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 294 selfloop transitions, 151 changer transitions 0/449 dead transitions. [2024-06-20 16:54:45,458 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 298 places, 449 transitions, 7804 flow [2024-06-20 16:54:45,459 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 16:54:45,459 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 16:54:45,459 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 135 transitions. [2024-06-20 16:54:45,459 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4017857142857143 [2024-06-20 16:54:45,459 INFO L175 Difference]: Start difference. First operand has 291 places, 412 transitions, 6247 flow. Second operand 8 states and 135 transitions. [2024-06-20 16:54:45,459 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 298 places, 449 transitions, 7804 flow [2024-06-20 16:54:47,497 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 289 places, 449 transitions, 7544 flow, removed 9 selfloop flow, removed 9 redundant places. [2024-06-20 16:54:47,502 INFO L231 Difference]: Finished difference. Result has 291 places, 421 transitions, 6580 flow [2024-06-20 16:54:47,503 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5993, PETRI_DIFFERENCE_MINUEND_PLACES=282, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=412, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=144, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=267, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6580, PETRI_PLACES=291, PETRI_TRANSITIONS=421} [2024-06-20 16:54:47,503 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 248 predicate places. [2024-06-20 16:54:47,503 INFO L495 AbstractCegarLoop]: Abstraction has has 291 places, 421 transitions, 6580 flow [2024-06-20 16:54:47,503 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 16:54:47,503 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:54:47,503 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 16:54:47,504 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable69 [2024-06-20 16:54:47,504 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 16:54:47,504 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:54:47,504 INFO L85 PathProgramCache]: Analyzing trace with hash 841804924, now seen corresponding path program 10 times [2024-06-20 16:54:47,504 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:54:47,504 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1776930136] [2024-06-20 16:54:47,504 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:54:47,505 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:54:47,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:54:50,912 INFO 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 16:54:50,912 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:54:50,912 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1776930136] [2024-06-20 16:54:50,913 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1776930136] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:54:50,913 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:54:50,913 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 16:54:50,913 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [485919926] [2024-06-20 16:54:50,913 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:54:50,913 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 16:54:50,913 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:54:50,913 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 16:54:50,913 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-20 16:54:50,947 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-20 16:54:50,947 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 291 places, 421 transitions, 6580 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 16:54:50,947 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:54:50,947 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-20 16:54:50,947 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:54:54,459 INFO L124 PetriNetUnfolderBase]: 7455/11927 cut-off events. [2024-06-20 16:54:54,459 INFO L125 PetriNetUnfolderBase]: For 1056504/1056530 co-relation queries the response was YES. [2024-06-20 16:54:54,572 INFO L83 FinitePrefix]: Finished finitePrefix Result has 91225 conditions, 11927 events. 7455/11927 cut-off events. For 1056504/1056530 co-relation queries the response was YES. Maximal size of possible extension queue 551. Compared 81349 event pairs, 2772 based on Foata normal form. 28/11954 useless extension candidates. Maximal degree in co-relation 91088. Up to 10888 conditions per place. [2024-06-20 16:54:54,615 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 296 selfloop transitions, 153 changer transitions 0/453 dead transitions. [2024-06-20 16:54:54,616 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 298 places, 453 transitions, 8020 flow [2024-06-20 16:54:54,616 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 16:54:54,616 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 16:54:54,617 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 137 transitions. [2024-06-20 16:54:54,618 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40773809523809523 [2024-06-20 16:54:54,618 INFO L175 Difference]: Start difference. First operand has 291 places, 421 transitions, 6580 flow. Second operand 8 states and 137 transitions. [2024-06-20 16:54:54,619 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 298 places, 453 transitions, 8020 flow [2024-06-20 16:54:56,324 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 296 places, 453 transitions, 7869 flow, removed 56 selfloop flow, removed 2 redundant places. [2024-06-20 16:54:56,330 INFO L231 Difference]: Finished difference. Result has 297 places, 424 transitions, 6821 flow [2024-06-20 16:54:56,331 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6439, PETRI_DIFFERENCE_MINUEND_PLACES=289, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=421, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=150, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=271, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6821, PETRI_PLACES=297, PETRI_TRANSITIONS=424} [2024-06-20 16:54:56,332 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 254 predicate places. [2024-06-20 16:54:56,332 INFO L495 AbstractCegarLoop]: Abstraction has has 297 places, 424 transitions, 6821 flow [2024-06-20 16:54:56,333 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 16:54:56,333 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:54:56,333 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 16:54:56,333 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70 [2024-06-20 16:54:56,333 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 16:54:56,333 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:54:56,333 INFO L85 PathProgramCache]: Analyzing trace with hash 619438948, now seen corresponding path program 6 times [2024-06-20 16:54:56,334 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:54:56,334 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2012219103] [2024-06-20 16:54:56,334 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:54:56,334 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:54:56,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:54:59,601 INFO 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 16:54:59,601 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:54:59,601 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2012219103] [2024-06-20 16:54:59,601 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2012219103] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:54:59,601 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:54:59,601 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 16:54:59,601 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [189841476] [2024-06-20 16:54:59,601 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:54:59,602 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 16:54:59,602 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:54:59,602 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 16:54:59,602 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-20 16:54:59,615 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-20 16:54:59,616 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 297 places, 424 transitions, 6821 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 16:54:59,616 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:54:59,616 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-20 16:54:59,616 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:55:02,981 INFO L124 PetriNetUnfolderBase]: 7437/11900 cut-off events. [2024-06-20 16:55:02,981 INFO L125 PetriNetUnfolderBase]: For 1053517/1053529 co-relation queries the response was YES. [2024-06-20 16:55:03,096 INFO L83 FinitePrefix]: Finished finitePrefix Result has 91203 conditions, 11900 events. 7437/11900 cut-off events. For 1053517/1053529 co-relation queries the response was YES. Maximal size of possible extension queue 551. Compared 81137 event pairs, 2741 based on Foata normal form. 18/11917 useless extension candidates. Maximal degree in co-relation 91064. Up to 10877 conditions per place. [2024-06-20 16:55:03,141 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 294 selfloop transitions, 163 changer transitions 0/461 dead transitions. [2024-06-20 16:55:03,141 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 305 places, 461 transitions, 8097 flow [2024-06-20 16:55:03,142 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 16:55:03,142 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 16:55:03,142 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 156 transitions. [2024-06-20 16:55:03,142 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4126984126984127 [2024-06-20 16:55:03,142 INFO L175 Difference]: Start difference. First operand has 297 places, 424 transitions, 6821 flow. Second operand 9 states and 156 transitions. [2024-06-20 16:55:03,142 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 305 places, 461 transitions, 8097 flow [2024-06-20 16:55:05,237 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 298 places, 461 transitions, 7704 flow, removed 61 selfloop flow, removed 7 redundant places. [2024-06-20 16:55:05,243 INFO L231 Difference]: Finished difference. Result has 299 places, 424 transitions, 6770 flow [2024-06-20 16:55:05,243 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6428, PETRI_DIFFERENCE_MINUEND_PLACES=290, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=424, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=163, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=261, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6770, PETRI_PLACES=299, PETRI_TRANSITIONS=424} [2024-06-20 16:55:05,243 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 256 predicate places. [2024-06-20 16:55:05,243 INFO L495 AbstractCegarLoop]: Abstraction has has 299 places, 424 transitions, 6770 flow [2024-06-20 16:55:05,243 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 16:55:05,244 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:55:05,244 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 16:55:05,244 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71 [2024-06-20 16:55:05,244 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 16:55:05,245 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:55:05,245 INFO L85 PathProgramCache]: Analyzing trace with hash -242230066, now seen corresponding path program 11 times [2024-06-20 16:55:05,245 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:55:05,245 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [413682221] [2024-06-20 16:55:05,245 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:55:05,245 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:55:05,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:55:08,366 INFO 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 16:55:08,367 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:55:08,367 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [413682221] [2024-06-20 16:55:08,367 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [413682221] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:55:08,367 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:55:08,367 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 16:55:08,367 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [752825161] [2024-06-20 16:55:08,368 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:55:08,368 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 16:55:08,368 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:55:08,368 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 16:55:08,368 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-20 16:55:08,385 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-20 16:55:08,385 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 299 places, 424 transitions, 6770 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 16:55:08,385 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:55:08,385 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-20 16:55:08,386 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:55:11,776 INFO L124 PetriNetUnfolderBase]: 7419/11876 cut-off events. [2024-06-20 16:55:11,776 INFO L125 PetriNetUnfolderBase]: For 1071242/1071254 co-relation queries the response was YES. [2024-06-20 16:55:11,901 INFO L83 FinitePrefix]: Finished finitePrefix Result has 90779 conditions, 11876 events. 7419/11876 cut-off events. For 1071242/1071254 co-relation queries the response was YES. Maximal size of possible extension queue 551. Compared 81038 event pairs, 2744 based on Foata normal form. 18/11893 useless extension candidates. Maximal degree in co-relation 90641. Up to 10866 conditions per place. [2024-06-20 16:55:11,949 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 294 selfloop transitions, 159 changer transitions 0/457 dead transitions. [2024-06-20 16:55:11,950 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 307 places, 457 transitions, 8030 flow [2024-06-20 16:55:11,951 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 16:55:11,951 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 16:55:11,951 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 152 transitions. [2024-06-20 16:55:11,951 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4021164021164021 [2024-06-20 16:55:11,951 INFO L175 Difference]: Start difference. First operand has 299 places, 424 transitions, 6770 flow. Second operand 9 states and 152 transitions. [2024-06-20 16:55:11,951 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 307 places, 457 transitions, 8030 flow [2024-06-20 16:55:13,719 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 298 places, 457 transitions, 7587 flow, removed 17 selfloop flow, removed 9 redundant places. [2024-06-20 16:55:13,725 INFO L231 Difference]: Finished difference. Result has 299 places, 424 transitions, 6661 flow [2024-06-20 16:55:13,725 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6331, PETRI_DIFFERENCE_MINUEND_PLACES=290, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=424, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=159, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=265, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6661, PETRI_PLACES=299, PETRI_TRANSITIONS=424} [2024-06-20 16:55:13,725 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 256 predicate places. [2024-06-20 16:55:13,725 INFO L495 AbstractCegarLoop]: Abstraction has has 299 places, 424 transitions, 6661 flow [2024-06-20 16:55:13,726 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 16:55:13,726 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:55:13,726 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 16:55:13,726 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72 [2024-06-20 16:55:13,726 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 16:55:13,726 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:55:13,726 INFO L85 PathProgramCache]: Analyzing trace with hash -242645776, now seen corresponding path program 12 times [2024-06-20 16:55:13,727 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:55:13,727 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [424954023] [2024-06-20 16:55:13,727 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:55:13,727 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:55:13,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:55:16,937 INFO 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 16:55:16,938 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:55:16,938 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [424954023] [2024-06-20 16:55:16,938 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [424954023] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:55:16,938 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:55:16,938 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 16:55:16,938 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [420142187] [2024-06-20 16:55:16,938 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:55:16,939 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 16:55:16,939 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:55:16,939 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 16:55:16,939 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-20 16:55:16,960 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-20 16:55:16,961 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 299 places, 424 transitions, 6661 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 16:55:16,961 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:55:16,961 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-20 16:55:16,961 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:55:20,457 INFO L124 PetriNetUnfolderBase]: 7285/11598 cut-off events. [2024-06-20 16:55:20,457 INFO L125 PetriNetUnfolderBase]: For 1054049/1054061 co-relation queries the response was YES. [2024-06-20 16:55:20,568 INFO L83 FinitePrefix]: Finished finitePrefix Result has 88970 conditions, 11598 events. 7285/11598 cut-off events. For 1054049/1054061 co-relation queries the response was YES. Maximal size of possible extension queue 532. Compared 78491 event pairs, 3088 based on Foata normal form. 18/11615 useless extension candidates. Maximal degree in co-relation 88832. Up to 11183 conditions per place. [2024-06-20 16:55:20,609 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 378 selfloop transitions, 69 changer transitions 4/455 dead transitions. [2024-06-20 16:55:20,610 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 306 places, 455 transitions, 7653 flow [2024-06-20 16:55:20,610 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 16:55:20,611 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 16:55:20,611 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 136 transitions. [2024-06-20 16:55:20,611 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40476190476190477 [2024-06-20 16:55:20,611 INFO L175 Difference]: Start difference. First operand has 299 places, 424 transitions, 6661 flow. Second operand 8 states and 136 transitions. [2024-06-20 16:55:20,611 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 306 places, 455 transitions, 7653 flow [2024-06-20 16:55:22,288 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 296 places, 455 transitions, 7160 flow, removed 6 selfloop flow, removed 10 redundant places. [2024-06-20 16:55:22,293 INFO L231 Difference]: Finished difference. Result has 297 places, 421 transitions, 6278 flow [2024-06-20 16:55:22,294 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6168, PETRI_DIFFERENCE_MINUEND_PLACES=289, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=424, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=69, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=355, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6278, PETRI_PLACES=297, PETRI_TRANSITIONS=421} [2024-06-20 16:55:22,300 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 254 predicate places. [2024-06-20 16:55:22,301 INFO L495 AbstractCegarLoop]: Abstraction has has 297 places, 421 transitions, 6278 flow [2024-06-20 16:55:22,301 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 16:55:22,301 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:55:22,301 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] [2024-06-20 16:55:22,301 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73 [2024-06-20 16:55:22,301 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 16:55:22,301 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:55:22,302 INFO L85 PathProgramCache]: Analyzing trace with hash 442316542, now seen corresponding path program 2 times [2024-06-20 16:55:22,302 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:55:22,302 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1060082149] [2024-06-20 16:55:22,302 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:55:22,302 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:55:22,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:55:26,880 INFO 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 16:55:26,881 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:55:26,881 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1060082149] [2024-06-20 16:55:26,881 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1060082149] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:55:26,881 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:55:26,881 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 16:55:26,881 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [838122349] [2024-06-20 16:55:26,881 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:55:26,881 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 16:55:26,882 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:55:26,882 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 16:55:26,882 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-20 16:55:26,948 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-20 16:55:26,949 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 297 places, 421 transitions, 6278 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 16:55:26,949 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:55:26,949 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-20 16:55:26,949 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:55:29,932 INFO L124 PetriNetUnfolderBase]: 6720/10743 cut-off events. [2024-06-20 16:55:29,932 INFO L125 PetriNetUnfolderBase]: For 1063518/1063551 co-relation queries the response was YES. [2024-06-20 16:55:30,038 INFO L83 FinitePrefix]: Finished finitePrefix Result has 83709 conditions, 10743 events. 6720/10743 cut-off events. For 1063518/1063551 co-relation queries the response was YES. Maximal size of possible extension queue 487. Compared 72784 event pairs, 2853 based on Foata normal form. 26/10706 useless extension candidates. Maximal degree in co-relation 83571. Up to 10058 conditions per place. [2024-06-20 16:55:30,079 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 331 selfloop transitions, 55 changer transitions 0/448 dead transitions. [2024-06-20 16:55:30,079 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 303 places, 448 transitions, 7180 flow [2024-06-20 16:55:30,080 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 16:55:30,080 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 16:55:30,080 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 121 transitions. [2024-06-20 16:55:30,080 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41156462585034015 [2024-06-20 16:55:30,081 INFO L175 Difference]: Start difference. First operand has 297 places, 421 transitions, 6278 flow. Second operand 7 states and 121 transitions. [2024-06-20 16:55:30,081 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 303 places, 448 transitions, 7180 flow [2024-06-20 16:55:31,693 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 294 places, 448 transitions, 7004 flow, removed 5 selfloop flow, removed 9 redundant places. [2024-06-20 16:55:31,699 INFO L231 Difference]: Finished difference. Result has 295 places, 423 transitions, 6271 flow [2024-06-20 16:55:31,700 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6102, PETRI_DIFFERENCE_MINUEND_PLACES=288, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=421, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=53, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=366, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=6271, PETRI_PLACES=295, PETRI_TRANSITIONS=423} [2024-06-20 16:55:31,700 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 252 predicate places. [2024-06-20 16:55:31,700 INFO L495 AbstractCegarLoop]: Abstraction has has 295 places, 423 transitions, 6271 flow [2024-06-20 16:55:31,700 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 16:55:31,701 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:55:31,701 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 16:55:31,701 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74 [2024-06-20 16:55:31,701 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 16:55:31,701 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:55:31,701 INFO L85 PathProgramCache]: Analyzing trace with hash 855623422, now seen corresponding path program 3 times [2024-06-20 16:55:31,701 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:55:31,702 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [14253440] [2024-06-20 16:55:31,702 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:55:31,702 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:55:31,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:55:35,782 INFO 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 16:55:35,783 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:55:35,783 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [14253440] [2024-06-20 16:55:35,783 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [14253440] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:55:35,783 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:55:35,783 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 16:55:35,783 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [687738436] [2024-06-20 16:55:35,783 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:55:35,784 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 16:55:35,784 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:55:35,784 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 16:55:35,784 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-20 16:55:35,829 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-20 16:55:35,830 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 295 places, 423 transitions, 6271 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 16:55:35,830 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:55:35,830 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-20 16:55:35,830 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:55:39,006 INFO L124 PetriNetUnfolderBase]: 6756/10792 cut-off events. [2024-06-20 16:55:39,007 INFO L125 PetriNetUnfolderBase]: For 1023228/1023260 co-relation queries the response was YES. [2024-06-20 16:55:39,092 INFO L83 FinitePrefix]: Finished finitePrefix Result has 83618 conditions, 10792 events. 6756/10792 cut-off events. For 1023228/1023260 co-relation queries the response was YES. Maximal size of possible extension queue 488. Compared 73074 event pairs, 2784 based on Foata normal form. 25/10741 useless extension candidates. Maximal degree in co-relation 83481. Up to 10193 conditions per place. [2024-06-20 16:55:39,130 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 323 selfloop transitions, 58 changer transitions 0/443 dead transitions. [2024-06-20 16:55:39,131 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 301 places, 443 transitions, 7129 flow [2024-06-20 16:55:39,131 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 16:55:39,132 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 16:55:39,132 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 115 transitions. [2024-06-20 16:55:39,132 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.391156462585034 [2024-06-20 16:55:39,132 INFO L175 Difference]: Start difference. First operand has 295 places, 423 transitions, 6271 flow. Second operand 7 states and 115 transitions. [2024-06-20 16:55:39,132 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 301 places, 443 transitions, 7129 flow [2024-06-20 16:55:40,942 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 296 places, 443 transitions, 7016 flow, removed 9 selfloop flow, removed 5 redundant places. [2024-06-20 16:55:40,948 INFO L231 Difference]: Finished difference. Result has 297 places, 424 transitions, 6304 flow [2024-06-20 16:55:40,949 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6160, PETRI_DIFFERENCE_MINUEND_PLACES=290, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=423, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=57, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=365, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=6304, PETRI_PLACES=297, PETRI_TRANSITIONS=424} [2024-06-20 16:55:40,949 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 254 predicate places. [2024-06-20 16:55:40,949 INFO L495 AbstractCegarLoop]: Abstraction has has 297 places, 424 transitions, 6304 flow [2024-06-20 16:55:40,949 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 16:55:40,949 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:55:40,949 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 16:55:40,949 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75 [2024-06-20 16:55:40,950 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 16:55:40,950 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:55:40,950 INFO L85 PathProgramCache]: Analyzing trace with hash 856098652, now seen corresponding path program 4 times [2024-06-20 16:55:40,950 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:55:40,950 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2093604156] [2024-06-20 16:55:40,950 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:55:40,950 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:55:40,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:55:44,654 INFO 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 16:55:44,654 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:55:44,654 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2093604156] [2024-06-20 16:55:44,654 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2093604156] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:55:44,655 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:55:44,655 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 16:55:44,655 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1778739232] [2024-06-20 16:55:44,655 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:55:44,655 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 16:55:44,655 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:55:44,656 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 16:55:44,656 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-20 16:55:44,692 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-20 16:55:44,692 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 297 places, 424 transitions, 6304 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 16:55:44,692 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:55:44,692 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-20 16:55:44,692 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:55:47,712 INFO L124 PetriNetUnfolderBase]: 6761/10804 cut-off events. [2024-06-20 16:55:47,713 INFO L125 PetriNetUnfolderBase]: For 1005534/1005564 co-relation queries the response was YES. [2024-06-20 16:55:47,816 INFO L83 FinitePrefix]: Finished finitePrefix Result has 83324 conditions, 10804 events. 6761/10804 cut-off events. For 1005534/1005564 co-relation queries the response was YES. Maximal size of possible extension queue 489. Compared 73245 event pairs, 2761 based on Foata normal form. 21/10756 useless extension candidates. Maximal degree in co-relation 83186. Up to 10030 conditions per place. [2024-06-20 16:55:48,087 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 320 selfloop transitions, 64 changer transitions 0/446 dead transitions. [2024-06-20 16:55:48,087 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 303 places, 446 transitions, 7186 flow [2024-06-20 16:55:48,088 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 16:55:48,088 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 16:55:48,088 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 116 transitions. [2024-06-20 16:55:48,089 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3945578231292517 [2024-06-20 16:55:48,089 INFO L175 Difference]: Start difference. First operand has 297 places, 424 transitions, 6304 flow. Second operand 7 states and 116 transitions. [2024-06-20 16:55:48,089 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 303 places, 446 transitions, 7186 flow [2024-06-20 16:55:49,597 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 298 places, 446 transitions, 7064 flow, removed 5 selfloop flow, removed 5 redundant places. [2024-06-20 16:55:49,603 INFO L231 Difference]: Finished difference. Result has 299 places, 425 transitions, 6338 flow [2024-06-20 16:55:49,603 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6182, PETRI_DIFFERENCE_MINUEND_PLACES=292, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=424, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=63, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=360, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=6338, PETRI_PLACES=299, PETRI_TRANSITIONS=425} [2024-06-20 16:55:49,603 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 256 predicate places. [2024-06-20 16:55:49,603 INFO L495 AbstractCegarLoop]: Abstraction has has 299 places, 425 transitions, 6338 flow [2024-06-20 16:55:49,604 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 16:55:49,604 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:55:49,604 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 16:55:49,604 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76 [2024-06-20 16:55:49,604 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 16:55:49,605 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:55:49,605 INFO L85 PathProgramCache]: Analyzing trace with hash 2120319744, now seen corresponding path program 1 times [2024-06-20 16:55:49,605 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:55:49,605 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [619059001] [2024-06-20 16:55:49,606 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:55:49,606 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:55:49,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:55:52,795 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 16:55:52,795 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:55:52,795 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [619059001] [2024-06-20 16:55:52,795 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [619059001] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:55:52,795 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:55:52,795 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 16:55:52,795 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [816402252] [2024-06-20 16:55:52,795 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:55:52,795 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 16:55:52,796 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:55:52,796 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 16:55:52,796 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-20 16:55:52,818 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-20 16:55:52,818 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 299 places, 425 transitions, 6338 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 16:55:52,818 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:55:52,818 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-20 16:55:52,818 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:55:56,178 INFO L124 PetriNetUnfolderBase]: 7126/11317 cut-off events. [2024-06-20 16:55:56,178 INFO L125 PetriNetUnfolderBase]: For 1055887/1055889 co-relation queries the response was YES. [2024-06-20 16:55:56,305 INFO L83 FinitePrefix]: Finished finitePrefix Result has 87987 conditions, 11317 events. 7126/11317 cut-off events. For 1055887/1055889 co-relation queries the response was YES. Maximal size of possible extension queue 493. Compared 75714 event pairs, 2826 based on Foata normal form. 2/11318 useless extension candidates. Maximal degree in co-relation 87848. Up to 10844 conditions per place. [2024-06-20 16:55:56,351 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 415 selfloop transitions, 48 changer transitions 0/467 dead transitions. [2024-06-20 16:55:56,351 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 306 places, 467 transitions, 7694 flow [2024-06-20 16:55:56,351 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 16:55:56,352 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 16:55:56,352 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 143 transitions. [2024-06-20 16:55:56,352 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4255952380952381 [2024-06-20 16:55:56,352 INFO L175 Difference]: Start difference. First operand has 299 places, 425 transitions, 6338 flow. Second operand 8 states and 143 transitions. [2024-06-20 16:55:56,352 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 306 places, 467 transitions, 7694 flow [2024-06-20 16:55:58,198 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 301 places, 467 transitions, 7554 flow, removed 7 selfloop flow, removed 5 redundant places. [2024-06-20 16:55:58,204 INFO L231 Difference]: Finished difference. Result has 302 places, 429 transitions, 6475 flow [2024-06-20 16:55:58,204 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6198, PETRI_DIFFERENCE_MINUEND_PLACES=294, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=425, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=379, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6475, PETRI_PLACES=302, PETRI_TRANSITIONS=429} [2024-06-20 16:55:58,204 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 259 predicate places. [2024-06-20 16:55:58,204 INFO L495 AbstractCegarLoop]: Abstraction has has 302 places, 429 transitions, 6475 flow [2024-06-20 16:55:58,205 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.0) internal successors, (81), 9 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:55:58,205 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:55:58,205 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:55:58,205 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77 [2024-06-20 16:55:58,205 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 16:55:58,205 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:55:58,205 INFO L85 PathProgramCache]: Analyzing trace with hash 468401548, now seen corresponding path program 2 times [2024-06-20 16:55:58,206 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:55:58,206 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1725391402] [2024-06-20 16:55:58,206 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:55:58,206 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:55:58,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:56:01,450 INFO 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 16:56:01,450 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:56:01,450 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1725391402] [2024-06-20 16:56:01,450 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1725391402] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:56:01,450 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:56:01,451 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 16:56:01,451 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2061451249] [2024-06-20 16:56:01,451 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:56:01,451 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 16:56:01,451 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:56:01,451 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 16:56:01,451 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-20 16:56:01,467 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-20 16:56:01,468 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 302 places, 429 transitions, 6475 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 16:56:01,468 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:56:01,468 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-20 16:56:01,468 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:56:04,858 INFO L124 PetriNetUnfolderBase]: 7134/11329 cut-off events. [2024-06-20 16:56:04,858 INFO L125 PetriNetUnfolderBase]: For 1087496/1087498 co-relation queries the response was YES. [2024-06-20 16:56:04,952 INFO L83 FinitePrefix]: Finished finitePrefix Result has 88594 conditions, 11329 events. 7134/11329 cut-off events. For 1087496/1087498 co-relation queries the response was YES. Maximal size of possible extension queue 493. Compared 75798 event pairs, 2864 based on Foata normal form. 2/11330 useless extension candidates. Maximal degree in co-relation 88454. Up to 10981 conditions per place. [2024-06-20 16:56:04,992 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 410 selfloop transitions, 45 changer transitions 0/459 dead transitions. [2024-06-20 16:56:04,992 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 309 places, 459 transitions, 7547 flow [2024-06-20 16:56:04,993 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 16:56:04,993 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 16:56:04,993 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 133 transitions. [2024-06-20 16:56:04,993 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3958333333333333 [2024-06-20 16:56:04,994 INFO L175 Difference]: Start difference. First operand has 302 places, 429 transitions, 6475 flow. Second operand 8 states and 133 transitions. [2024-06-20 16:56:04,994 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 309 places, 459 transitions, 7547 flow [2024-06-20 16:56:06,801 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 305 places, 459 transitions, 7394 flow, removed 49 selfloop flow, removed 4 redundant places. [2024-06-20 16:56:06,807 INFO L231 Difference]: Finished difference. Result has 306 places, 431 transitions, 6511 flow [2024-06-20 16:56:06,807 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6330, PETRI_DIFFERENCE_MINUEND_PLACES=298, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=429, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=384, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6511, PETRI_PLACES=306, PETRI_TRANSITIONS=431} [2024-06-20 16:56:06,807 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 263 predicate places. [2024-06-20 16:56:06,808 INFO L495 AbstractCegarLoop]: Abstraction has has 306 places, 431 transitions, 6511 flow [2024-06-20 16:56:06,808 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 16:56:06,808 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:56:06,808 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 16:56:06,808 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78 [2024-06-20 16:56:06,808 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 16:56:06,808 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:56:06,809 INFO L85 PathProgramCache]: Analyzing trace with hash 583808038, now seen corresponding path program 3 times [2024-06-20 16:56:06,809 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:56:06,809 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [351260783] [2024-06-20 16:56:06,809 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:56:06,809 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:56:06,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:56:10,221 INFO 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 16:56:10,221 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:56:10,221 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [351260783] [2024-06-20 16:56:10,222 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [351260783] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:56:10,222 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:56:10,222 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 16:56:10,222 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [292657423] [2024-06-20 16:56:10,222 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:56:10,222 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 16:56:10,222 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:56:10,223 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 16:56:10,223 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-20 16:56:10,239 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-20 16:56:10,240 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 306 places, 431 transitions, 6511 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 16:56:10,240 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:56:10,240 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-20 16:56:10,240 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:56:13,469 INFO L124 PetriNetUnfolderBase]: 7186/11409 cut-off events. [2024-06-20 16:56:13,469 INFO L125 PetriNetUnfolderBase]: For 1147686/1147688 co-relation queries the response was YES. [2024-06-20 16:56:13,589 INFO L83 FinitePrefix]: Finished finitePrefix Result has 89670 conditions, 11409 events. 7186/11409 cut-off events. For 1147686/1147688 co-relation queries the response was YES. Maximal size of possible extension queue 493. Compared 76584 event pairs, 2984 based on Foata normal form. 14/11422 useless extension candidates. Maximal degree in co-relation 89528. Up to 11117 conditions per place. [2024-06-20 16:56:13,633 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 431 selfloop transitions, 26 changer transitions 0/461 dead transitions. [2024-06-20 16:56:13,633 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 314 places, 461 transitions, 7609 flow [2024-06-20 16:56:13,634 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 16:56:13,634 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 16:56:13,634 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 140 transitions. [2024-06-20 16:56:13,635 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37037037037037035 [2024-06-20 16:56:13,635 INFO L175 Difference]: Start difference. First operand has 306 places, 431 transitions, 6511 flow. Second operand 9 states and 140 transitions. [2024-06-20 16:56:13,635 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 314 places, 461 transitions, 7609 flow [2024-06-20 16:56:15,688 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 308 places, 461 transitions, 7448 flow, removed 37 selfloop flow, removed 6 redundant places. [2024-06-20 16:56:15,694 INFO L231 Difference]: Finished difference. Result has 309 places, 433 transitions, 6498 flow [2024-06-20 16:56:15,694 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6350, PETRI_DIFFERENCE_MINUEND_PLACES=300, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=431, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=405, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6498, PETRI_PLACES=309, PETRI_TRANSITIONS=433} [2024-06-20 16:56:15,695 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 266 predicate places. [2024-06-20 16:56:15,695 INFO L495 AbstractCegarLoop]: Abstraction has has 309 places, 433 transitions, 6498 flow [2024-06-20 16:56:15,695 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 16:56:15,695 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:56:15,695 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:56:15,695 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79 [2024-06-20 16:56:15,695 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 16:56:15,696 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:56:15,696 INFO L85 PathProgramCache]: Analyzing trace with hash 583992736, now seen corresponding path program 1 times [2024-06-20 16:56:15,696 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:56:15,696 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [984712] [2024-06-20 16:56:15,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:56:15,697 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:56:15,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:56:18,865 INFO 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 16:56:18,866 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:56:18,866 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [984712] [2024-06-20 16:56:18,866 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [984712] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:56:18,866 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:56:18,866 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 16:56:18,866 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [697769984] [2024-06-20 16:56:18,866 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:56:18,867 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 16:56:18,867 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:56:18,867 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 16:56:18,867 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-20 16:56:18,923 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-20 16:56:18,923 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 309 places, 433 transitions, 6498 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 16:56:18,923 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:56:18,923 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-20 16:56:18,924 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:56:22,332 INFO L124 PetriNetUnfolderBase]: 7238/11489 cut-off events. [2024-06-20 16:56:22,333 INFO L125 PetriNetUnfolderBase]: For 1178434/1178436 co-relation queries the response was YES. [2024-06-20 16:56:22,470 INFO L83 FinitePrefix]: Finished finitePrefix Result has 90473 conditions, 11489 events. 7238/11489 cut-off events. For 1178434/1178436 co-relation queries the response was YES. Maximal size of possible extension queue 494. Compared 77237 event pairs, 2992 based on Foata normal form. 14/11502 useless extension candidates. Maximal degree in co-relation 90330. Up to 11197 conditions per place. [2024-06-20 16:56:22,517 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 433 selfloop transitions, 26 changer transitions 0/463 dead transitions. [2024-06-20 16:56:22,518 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 317 places, 463 transitions, 7566 flow [2024-06-20 16:56:22,518 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 16:56:22,518 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 16:56:22,519 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 140 transitions. [2024-06-20 16:56:22,519 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37037037037037035 [2024-06-20 16:56:22,519 INFO L175 Difference]: Start difference. First operand has 309 places, 433 transitions, 6498 flow. Second operand 9 states and 140 transitions. [2024-06-20 16:56:22,519 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 317 places, 463 transitions, 7566 flow [2024-06-20 16:56:24,790 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 310 places, 463 transitions, 7450 flow, removed 34 selfloop flow, removed 7 redundant places. [2024-06-20 16:56:24,796 INFO L231 Difference]: Finished difference. Result has 311 places, 435 transitions, 6496 flow [2024-06-20 16:56:24,796 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6382, PETRI_DIFFERENCE_MINUEND_PLACES=302, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=433, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=407, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6496, PETRI_PLACES=311, PETRI_TRANSITIONS=435} [2024-06-20 16:56:24,796 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 268 predicate places. [2024-06-20 16:56:24,796 INFO L495 AbstractCegarLoop]: Abstraction has has 311 places, 435 transitions, 6496 flow [2024-06-20 16:56:24,797 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 16:56:24,797 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:56:24,797 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:56:24,797 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80 [2024-06-20 16:56:24,797 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 16:56:24,797 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:56:24,797 INFO L85 PathProgramCache]: Analyzing trace with hash -242399884, now seen corresponding path program 4 times [2024-06-20 16:56:24,798 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:56:24,798 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [970310687] [2024-06-20 16:56:24,798 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:56:24,798 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:56:24,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:56:28,221 INFO 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 16:56:28,221 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:56:28,221 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [970310687] [2024-06-20 16:56:28,221 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [970310687] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:56:28,221 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:56:28,222 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 16:56:28,222 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [444364491] [2024-06-20 16:56:28,222 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:56:28,222 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 16:56:28,222 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:56:28,222 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 16:56:28,223 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-20 16:56:28,230 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-20 16:56:28,230 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 311 places, 435 transitions, 6496 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 16:56:28,230 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:56:28,230 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-20 16:56:28,230 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:56:31,703 INFO L124 PetriNetUnfolderBase]: 7205/11442 cut-off events. [2024-06-20 16:56:31,703 INFO L125 PetriNetUnfolderBase]: For 1174066/1174068 co-relation queries the response was YES. [2024-06-20 16:56:31,815 INFO L83 FinitePrefix]: Finished finitePrefix Result has 89488 conditions, 11442 events. 7205/11442 cut-off events. For 1174066/1174068 co-relation queries the response was YES. Maximal size of possible extension queue 493. Compared 76694 event pairs, 2819 based on Foata normal form. 14/11455 useless extension candidates. Maximal degree in co-relation 89344. Up to 10986 conditions per place. [2024-06-20 16:56:31,858 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 422 selfloop transitions, 46 changer transitions 0/472 dead transitions. [2024-06-20 16:56:31,858 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 319 places, 472 transitions, 7556 flow [2024-06-20 16:56:31,859 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 16:56:31,859 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 16:56:31,859 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 151 transitions. [2024-06-20 16:56:31,859 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3994708994708995 [2024-06-20 16:56:31,860 INFO L175 Difference]: Start difference. First operand has 311 places, 435 transitions, 6496 flow. Second operand 9 states and 151 transitions. [2024-06-20 16:56:31,860 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 319 places, 472 transitions, 7556 flow [2024-06-20 16:56:34,010 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 312 places, 472 transitions, 7404 flow, removed 52 selfloop flow, removed 7 redundant places. [2024-06-20 16:56:34,016 INFO L231 Difference]: Finished difference. Result has 313 places, 435 transitions, 6449 flow [2024-06-20 16:56:34,016 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6344, PETRI_DIFFERENCE_MINUEND_PLACES=304, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=435, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=389, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6449, PETRI_PLACES=313, PETRI_TRANSITIONS=435} [2024-06-20 16:56:34,017 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 270 predicate places. [2024-06-20 16:56:34,017 INFO L495 AbstractCegarLoop]: Abstraction has has 313 places, 435 transitions, 6449 flow [2024-06-20 16:56:34,017 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 16:56:34,017 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:56:34,017 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:56:34,017 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81 [2024-06-20 16:56:34,017 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 16:56:34,018 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:56:34,018 INFO L85 PathProgramCache]: Analyzing trace with hash 855807934, now seen corresponding path program 2 times [2024-06-20 16:56:34,018 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:56:34,019 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1374286973] [2024-06-20 16:56:34,019 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:56:34,019 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:56:34,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:56:37,958 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:56:37,958 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:56:37,958 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1374286973] [2024-06-20 16:56:37,958 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1374286973] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:56:37,958 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:56:37,959 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 16:56:37,959 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [508084300] [2024-06-20 16:56:37,959 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:56:37,959 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 16:56:37,959 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:56:37,959 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 16:56:37,959 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-20 16:56:37,977 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-20 16:56:37,977 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 313 places, 435 transitions, 6449 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 16:56:37,977 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:56:37,977 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-20 16:56:37,977 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:56:41,305 INFO L124 PetriNetUnfolderBase]: 7213/11455 cut-off events. [2024-06-20 16:56:41,305 INFO L125 PetriNetUnfolderBase]: For 1172807/1172811 co-relation queries the response was YES. [2024-06-20 16:56:41,399 INFO L83 FinitePrefix]: Finished finitePrefix Result has 89882 conditions, 11455 events. 7213/11455 cut-off events. For 1172807/1172811 co-relation queries the response was YES. Maximal size of possible extension queue 493. Compared 76745 event pairs, 2853 based on Foata normal form. 4/11458 useless extension candidates. Maximal degree in co-relation 89737. Up to 11130 conditions per place. [2024-06-20 16:56:41,438 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 416 selfloop transitions, 40 changer transitions 0/460 dead transitions. [2024-06-20 16:56:41,438 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 320 places, 460 transitions, 7475 flow [2024-06-20 16:56:41,439 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 16:56:41,439 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 16:56:41,439 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 127 transitions. [2024-06-20 16:56:41,439 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37797619047619047 [2024-06-20 16:56:41,439 INFO L175 Difference]: Start difference. First operand has 313 places, 435 transitions, 6449 flow. Second operand 8 states and 127 transitions. [2024-06-20 16:56:41,439 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 320 places, 460 transitions, 7475 flow [2024-06-20 16:56:43,203 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 312 places, 460 transitions, 7374 flow, removed 3 selfloop flow, removed 8 redundant places. [2024-06-20 16:56:43,209 INFO L231 Difference]: Finished difference. Result has 313 places, 437 transitions, 6493 flow [2024-06-20 16:56:43,209 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6348, PETRI_DIFFERENCE_MINUEND_PLACES=305, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=435, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=395, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6493, PETRI_PLACES=313, PETRI_TRANSITIONS=437} [2024-06-20 16:56:43,210 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 270 predicate places. [2024-06-20 16:56:43,210 INFO L495 AbstractCegarLoop]: Abstraction has has 313 places, 437 transitions, 6493 flow [2024-06-20 16:56:43,210 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 16:56:43,210 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:56:43,210 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:56:43,210 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82 [2024-06-20 16:56:43,210 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 16:56:43,211 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:56:43,211 INFO L85 PathProgramCache]: Analyzing trace with hash -242215186, now seen corresponding path program 3 times [2024-06-20 16:56:43,211 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:56:43,211 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2022322766] [2024-06-20 16:56:43,211 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:56:43,211 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:56:43,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:56:46,466 INFO 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 16:56:46,467 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:56:46,467 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2022322766] [2024-06-20 16:56:46,467 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2022322766] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:56:46,467 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:56:46,467 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 16:56:46,467 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [830760688] [2024-06-20 16:56:46,467 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:56:46,467 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 16:56:46,468 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:56:46,468 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 16:56:46,468 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-20 16:56:46,485 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-20 16:56:46,485 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 313 places, 437 transitions, 6493 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 16:56:46,485 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:56:46,485 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-20 16:56:46,485 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:56:49,796 INFO L124 PetriNetUnfolderBase]: 7265/11534 cut-off events. [2024-06-20 16:56:49,797 INFO L125 PetriNetUnfolderBase]: For 1205160/1205162 co-relation queries the response was YES. [2024-06-20 16:56:49,926 INFO L83 FinitePrefix]: Finished finitePrefix Result has 90438 conditions, 11534 events. 7265/11534 cut-off events. For 1205160/1205162 co-relation queries the response was YES. Maximal size of possible extension queue 494. Compared 77337 event pairs, 2871 based on Foata normal form. 14/11547 useless extension candidates. Maximal degree in co-relation 90292. Up to 11100 conditions per place. [2024-06-20 16:56:49,976 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 425 selfloop transitions, 43 changer transitions 0/472 dead transitions. [2024-06-20 16:56:49,976 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 321 places, 472 transitions, 7601 flow [2024-06-20 16:56:49,977 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 16:56:49,977 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 16:56:49,977 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 147 transitions. [2024-06-20 16:56:49,977 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3888888888888889 [2024-06-20 16:56:49,977 INFO L175 Difference]: Start difference. First operand has 313 places, 437 transitions, 6493 flow. Second operand 9 states and 147 transitions. [2024-06-20 16:56:49,978 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 321 places, 472 transitions, 7601 flow [2024-06-20 16:56:52,375 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 315 places, 472 transitions, 7472 flow, removed 26 selfloop flow, removed 6 redundant places. [2024-06-20 16:56:52,381 INFO L231 Difference]: Finished difference. Result has 316 places, 439 transitions, 6524 flow [2024-06-20 16:56:52,381 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6364, PETRI_DIFFERENCE_MINUEND_PLACES=307, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=437, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=394, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6524, PETRI_PLACES=316, PETRI_TRANSITIONS=439} [2024-06-20 16:56:52,382 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 273 predicate places. [2024-06-20 16:56:52,382 INFO L495 AbstractCegarLoop]: Abstraction has has 316 places, 439 transitions, 6524 flow [2024-06-20 16:56:52,382 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 16:56:52,382 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:56:52,382 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 16:56:52,382 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83 [2024-06-20 16:56:52,383 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 16:56:52,384 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:56:52,384 INFO L85 PathProgramCache]: Analyzing trace with hash 847772734, now seen corresponding path program 4 times [2024-06-20 16:56:52,384 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:56:52,384 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1811758146] [2024-06-20 16:56:52,384 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:56:52,384 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:56:52,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:56:55,888 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:56:55,888 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:56:55,888 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1811758146] [2024-06-20 16:56:55,889 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1811758146] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:56:55,889 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:56:55,889 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 16:56:55,889 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1502721330] [2024-06-20 16:56:55,889 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:56:55,889 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 16:56:55,889 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:56:55,890 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 16:56:55,890 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-20 16:56:55,911 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-20 16:56:55,911 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 316 places, 439 transitions, 6524 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 16:56:55,912 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:56:55,912 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-20 16:56:55,912 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:56:59,182 INFO L124 PetriNetUnfolderBase]: 7260/11524 cut-off events. [2024-06-20 16:56:59,182 INFO L125 PetriNetUnfolderBase]: For 1201288/1201292 co-relation queries the response was YES. [2024-06-20 16:56:59,311 INFO L83 FinitePrefix]: Finished finitePrefix Result has 90764 conditions, 11524 events. 7260/11524 cut-off events. For 1201288/1201292 co-relation queries the response was YES. Maximal size of possible extension queue 494. Compared 77178 event pairs, 2850 based on Foata normal form. 4/11527 useless extension candidates. Maximal degree in co-relation 90617. Up to 11073 conditions per place. [2024-06-20 16:56:59,357 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 418 selfloop transitions, 47 changer transitions 0/469 dead transitions. [2024-06-20 16:56:59,358 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 323 places, 469 transitions, 7616 flow [2024-06-20 16:56:59,358 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 16:56:59,358 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 16:56:59,359 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 132 transitions. [2024-06-20 16:56:59,359 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39285714285714285 [2024-06-20 16:56:59,359 INFO L175 Difference]: Start difference. First operand has 316 places, 439 transitions, 6524 flow. Second operand 8 states and 132 transitions. [2024-06-20 16:56:59,359 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 323 places, 469 transitions, 7616 flow [2024-06-20 16:57:02,028 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 316 places, 469 transitions, 7482 flow, removed 28 selfloop flow, removed 7 redundant places. [2024-06-20 16:57:02,036 INFO L231 Difference]: Finished difference. Result has 317 places, 441 transitions, 6557 flow [2024-06-20 16:57:02,036 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6394, PETRI_DIFFERENCE_MINUEND_PLACES=309, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=439, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=45, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=392, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6557, PETRI_PLACES=317, PETRI_TRANSITIONS=441} [2024-06-20 16:57:02,037 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 274 predicate places. [2024-06-20 16:57:02,037 INFO L495 AbstractCegarLoop]: Abstraction has has 317 places, 441 transitions, 6557 flow [2024-06-20 16:57:02,037 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 16:57:02,037 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:57:02,037 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 16:57:02,037 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84 [2024-06-20 16:57:02,037 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 16:57:02,038 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:57:02,038 INFO L85 PathProgramCache]: Analyzing trace with hash -540339063, now seen corresponding path program 1 times [2024-06-20 16:57:02,038 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:57:02,038 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [428836206] [2024-06-20 16:57:02,038 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:57:02,038 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:57:02,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:57:05,576 INFO 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 16:57:05,577 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:57:05,577 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [428836206] [2024-06-20 16:57:05,577 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [428836206] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:57:05,577 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:57:05,577 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 16:57:05,577 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1970102336] [2024-06-20 16:57:05,577 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:57:05,578 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 16:57:05,578 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:57:05,579 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 16:57:05,580 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-20 16:57:05,612 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-20 16:57:05,613 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 317 places, 441 transitions, 6557 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 16:57:05,613 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:57:05,613 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-20 16:57:05,613 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:57:09,258 INFO L124 PetriNetUnfolderBase]: 7242/11501 cut-off events. [2024-06-20 16:57:09,258 INFO L125 PetriNetUnfolderBase]: For 1193566/1193572 co-relation queries the response was YES. [2024-06-20 16:57:09,378 INFO L83 FinitePrefix]: Finished finitePrefix Result has 89838 conditions, 11501 events. 7242/11501 cut-off events. For 1193566/1193572 co-relation queries the response was YES. Maximal size of possible extension queue 485. Compared 76973 event pairs, 2735 based on Foata normal form. 14/11514 useless extension candidates. Maximal degree in co-relation 89690. Up to 11130 conditions per place. [2024-06-20 16:57:09,421 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 434 selfloop transitions, 44 changer transitions 0/482 dead transitions. [2024-06-20 16:57:09,422 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 325 places, 482 transitions, 7644 flow [2024-06-20 16:57:09,422 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 16:57:09,422 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 16:57:09,423 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 149 transitions. [2024-06-20 16:57:09,423 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3941798941798942 [2024-06-20 16:57:09,423 INFO L175 Difference]: Start difference. First operand has 317 places, 441 transitions, 6557 flow. Second operand 9 states and 149 transitions. [2024-06-20 16:57:09,423 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 325 places, 482 transitions, 7644 flow [2024-06-20 16:57:11,402 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 319 places, 482 transitions, 7497 flow, removed 28 selfloop flow, removed 6 redundant places. [2024-06-20 16:57:11,420 INFO L231 Difference]: Finished difference. Result has 320 places, 442 transitions, 6507 flow [2024-06-20 16:57:11,421 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6410, PETRI_DIFFERENCE_MINUEND_PLACES=311, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=441, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=398, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6507, PETRI_PLACES=320, PETRI_TRANSITIONS=442} [2024-06-20 16:57:11,421 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 277 predicate places. [2024-06-20 16:57:11,421 INFO L495 AbstractCegarLoop]: Abstraction has has 320 places, 442 transitions, 6507 flow [2024-06-20 16:57:11,421 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 16:57:11,421 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:57:11,421 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 16:57:11,421 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85 [2024-06-20 16:57:11,422 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 16:57:11,422 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:57:11,422 INFO L85 PathProgramCache]: Analyzing trace with hash 738460779, now seen corresponding path program 2 times [2024-06-20 16:57:11,422 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:57:11,422 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2081844990] [2024-06-20 16:57:11,422 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:57:11,422 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:57:11,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:57:15,370 INFO 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 16:57:15,370 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:57:15,370 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2081844990] [2024-06-20 16:57:15,370 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2081844990] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:57:15,370 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:57:15,370 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 16:57:15,370 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [297526870] [2024-06-20 16:57:15,371 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:57:15,371 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 16:57:15,371 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:57:15,371 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 16:57:15,371 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-20 16:57:15,416 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-20 16:57:15,416 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 320 places, 442 transitions, 6507 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 16:57:15,416 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:57:15,416 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-20 16:57:15,416 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:57:19,167 INFO L124 PetriNetUnfolderBase]: 7344/11663 cut-off events. [2024-06-20 16:57:19,168 INFO L125 PetriNetUnfolderBase]: For 1222212/1222218 co-relation queries the response was YES. [2024-06-20 16:57:19,285 INFO L83 FinitePrefix]: Finished finitePrefix Result has 91051 conditions, 11663 events. 7344/11663 cut-off events. For 1222212/1222218 co-relation queries the response was YES. Maximal size of possible extension queue 493. Compared 78421 event pairs, 2973 based on Foata normal form. 14/11676 useless extension candidates. Maximal degree in co-relation 90902. Up to 11274 conditions per place. [2024-06-20 16:57:19,324 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 437 selfloop transitions, 58 changer transitions 0/499 dead transitions. [2024-06-20 16:57:19,325 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 329 places, 499 transitions, 7897 flow [2024-06-20 16:57:19,325 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 16:57:19,326 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 16:57:19,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 160 transitions. [2024-06-20 16:57:19,326 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38095238095238093 [2024-06-20 16:57:19,326 INFO L175 Difference]: Start difference. First operand has 320 places, 442 transitions, 6507 flow. Second operand 10 states and 160 transitions. [2024-06-20 16:57:19,326 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 329 places, 499 transitions, 7897 flow [2024-06-20 16:57:21,991 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 322 places, 499 transitions, 7718 flow, removed 18 selfloop flow, removed 7 redundant places. [2024-06-20 16:57:21,997 INFO L231 Difference]: Finished difference. Result has 325 places, 458 transitions, 6740 flow [2024-06-20 16:57:21,998 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6350, PETRI_DIFFERENCE_MINUEND_PLACES=313, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=442, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=42, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=390, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=6740, PETRI_PLACES=325, PETRI_TRANSITIONS=458} [2024-06-20 16:57:21,998 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 282 predicate places. [2024-06-20 16:57:21,998 INFO L495 AbstractCegarLoop]: Abstraction has has 325 places, 458 transitions, 6740 flow [2024-06-20 16:57:21,998 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 16:57:21,998 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:57:21,998 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 16:57:21,999 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86 [2024-06-20 16:57:21,999 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 16:57:21,999 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:57:21,999 INFO L85 PathProgramCache]: Analyzing trace with hash 819589329, now seen corresponding path program 1 times [2024-06-20 16:57:21,999 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:57:21,999 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [42897811] [2024-06-20 16:57:21,999 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:57:21,999 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:57:22,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:57:25,792 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:57:25,792 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:57:25,792 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [42897811] [2024-06-20 16:57:25,792 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [42897811] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:57:25,792 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:57:25,792 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 16:57:25,793 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1707786353] [2024-06-20 16:57:25,793 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:57:25,793 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 16:57:25,793 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:57:25,793 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 16:57:25,793 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-20 16:57:25,809 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-20 16:57:25,810 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 325 places, 458 transitions, 6740 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 16:57:25,810 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:57:25,810 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-20 16:57:25,810 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:57:29,722 INFO L124 PetriNetUnfolderBase]: 7386/11721 cut-off events. [2024-06-20 16:57:29,722 INFO L125 PetriNetUnfolderBase]: For 1251814/1251820 co-relation queries the response was YES. [2024-06-20 16:57:29,824 INFO L83 FinitePrefix]: Finished finitePrefix Result has 92097 conditions, 11721 events. 7386/11721 cut-off events. For 1251814/1251820 co-relation queries the response was YES. Maximal size of possible extension queue 494. Compared 78849 event pairs, 2817 based on Foata normal form. 8/11728 useless extension candidates. Maximal degree in co-relation 91946. Up to 11054 conditions per place. [2024-06-20 16:57:29,862 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 397 selfloop transitions, 112 changer transitions 0/513 dead transitions. [2024-06-20 16:57:29,862 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 335 places, 513 transitions, 8344 flow [2024-06-20 16:57:29,863 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-20 16:57:29,863 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-20 16:57:29,863 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 186 transitions. [2024-06-20 16:57:29,863 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4025974025974026 [2024-06-20 16:57:29,864 INFO L175 Difference]: Start difference. First operand has 325 places, 458 transitions, 6740 flow. Second operand 11 states and 186 transitions. [2024-06-20 16:57:29,864 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 335 places, 513 transitions, 8344 flow [2024-06-20 16:57:31,698 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 330 places, 513 transitions, 8246 flow, removed 5 selfloop flow, removed 5 redundant places. [2024-06-20 16:57:31,704 INFO L231 Difference]: Finished difference. Result has 332 places, 464 transitions, 7077 flow [2024-06-20 16:57:31,704 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6642, PETRI_DIFFERENCE_MINUEND_PLACES=320, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=458, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=108, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=348, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=7077, PETRI_PLACES=332, PETRI_TRANSITIONS=464} [2024-06-20 16:57:31,704 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 289 predicate places. [2024-06-20 16:57:31,704 INFO L495 AbstractCegarLoop]: Abstraction has has 332 places, 464 transitions, 7077 flow [2024-06-20 16:57:31,705 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 16:57:31,705 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:57:31,705 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 16:57:31,706 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable87 [2024-06-20 16:57:31,706 INFO L420 AbstractCegarLoop]: === Iteration 89 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:57:31,706 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:57:31,706 INFO L85 PathProgramCache]: Analyzing trace with hash 819709299, now seen corresponding path program 2 times [2024-06-20 16:57:31,706 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:57:31,706 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [870869339] [2024-06-20 16:57:31,706 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:57:31,706 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:57:31,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:57:35,342 INFO 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 16:57:35,343 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:57:35,343 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [870869339] [2024-06-20 16:57:35,343 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [870869339] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:57:35,343 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:57:35,343 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 16:57:35,343 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [374794979] [2024-06-20 16:57:35,343 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:57:35,344 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 16:57:35,344 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:57:35,344 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 16:57:35,344 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-20 16:57:35,358 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-20 16:57:35,358 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 332 places, 464 transitions, 7077 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 16:57:35,359 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:57:35,359 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-20 16:57:35,359 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:57:39,267 INFO L124 PetriNetUnfolderBase]: 7376/11713 cut-off events. [2024-06-20 16:57:39,267 INFO L125 PetriNetUnfolderBase]: For 1286665/1286671 co-relation queries the response was YES. [2024-06-20 16:57:39,364 INFO L83 FinitePrefix]: Finished finitePrefix Result has 94194 conditions, 11713 events. 7376/11713 cut-off events. For 1286665/1286671 co-relation queries the response was YES. Maximal size of possible extension queue 494. Compared 78706 event pairs, 2934 based on Foata normal form. 12/11724 useless extension candidates. Maximal degree in co-relation 94041. Up to 11326 conditions per place. [2024-06-20 16:57:39,401 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 437 selfloop transitions, 64 changer transitions 0/505 dead transitions. [2024-06-20 16:57:39,401 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 341 places, 505 transitions, 8350 flow [2024-06-20 16:57:39,402 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 16:57:39,402 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 16:57:39,402 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 165 transitions. [2024-06-20 16:57:39,402 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39285714285714285 [2024-06-20 16:57:39,402 INFO L175 Difference]: Start difference. First operand has 332 places, 464 transitions, 7077 flow. Second operand 10 states and 165 transitions. [2024-06-20 16:57:39,402 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 341 places, 505 transitions, 8350 flow [2024-06-20 16:57:41,350 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 333 places, 505 transitions, 8042 flow, removed 74 selfloop flow, removed 8 redundant places. [2024-06-20 16:57:41,357 INFO L231 Difference]: Finished difference. Result has 334 places, 465 transitions, 6914 flow [2024-06-20 16:57:41,357 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6769, PETRI_DIFFERENCE_MINUEND_PLACES=324, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=464, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=63, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=401, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=6914, PETRI_PLACES=334, PETRI_TRANSITIONS=465} [2024-06-20 16:57:41,358 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 291 predicate places. [2024-06-20 16:57:41,358 INFO L495 AbstractCegarLoop]: Abstraction has has 334 places, 465 transitions, 6914 flow [2024-06-20 16:57:41,358 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 16:57:41,358 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:57:41,358 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 16:57:41,358 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable88 [2024-06-20 16:57:41,358 INFO L420 AbstractCegarLoop]: === Iteration 90 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:57:41,359 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:57:41,359 INFO L85 PathProgramCache]: Analyzing trace with hash 819709485, now seen corresponding path program 1 times [2024-06-20 16:57:41,359 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:57:41,359 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [320670164] [2024-06-20 16:57:41,359 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:57:41,359 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:57:41,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:57:45,217 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:57:45,217 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:57:45,218 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [320670164] [2024-06-20 16:57:45,218 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [320670164] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:57:45,218 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:57:45,218 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 16:57:45,218 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1379886561] [2024-06-20 16:57:45,218 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:57:45,218 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 16:57:45,218 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:57:45,219 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 16:57:45,219 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-20 16:57:45,231 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-20 16:57:45,231 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 334 places, 465 transitions, 6914 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 16:57:45,231 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:57:45,231 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-20 16:57:45,231 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:57:48,882 INFO L124 PetriNetUnfolderBase]: 7350/11673 cut-off events. [2024-06-20 16:57:48,883 INFO L125 PetriNetUnfolderBase]: For 1299774/1299780 co-relation queries the response was YES. [2024-06-20 16:57:48,984 INFO L83 FinitePrefix]: Finished finitePrefix Result has 93669 conditions, 11673 events. 7350/11673 cut-off events. For 1299774/1299780 co-relation queries the response was YES. Maximal size of possible extension queue 493. Compared 78252 event pairs, 2973 based on Foata normal form. 12/11684 useless extension candidates. Maximal degree in co-relation 93515. Up to 11307 conditions per place. [2024-06-20 16:57:49,019 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 436 selfloop transitions, 64 changer transitions 0/504 dead transitions. [2024-06-20 16:57:49,019 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 343 places, 504 transitions, 8024 flow [2024-06-20 16:57:49,020 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 16:57:49,020 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 16:57:49,020 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 164 transitions. [2024-06-20 16:57:49,020 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3904761904761905 [2024-06-20 16:57:49,021 INFO L175 Difference]: Start difference. First operand has 334 places, 465 transitions, 6914 flow. Second operand 10 states and 164 transitions. [2024-06-20 16:57:49,021 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 343 places, 504 transitions, 8024 flow [2024-06-20 16:57:51,569 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 335 places, 504 transitions, 7780 flow, removed 26 selfloop flow, removed 8 redundant places. [2024-06-20 16:57:51,575 INFO L231 Difference]: Finished difference. Result has 336 places, 465 transitions, 6806 flow [2024-06-20 16:57:51,575 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6670, PETRI_DIFFERENCE_MINUEND_PLACES=326, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=465, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=64, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=401, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=6806, PETRI_PLACES=336, PETRI_TRANSITIONS=465} [2024-06-20 16:57:51,575 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 293 predicate places. [2024-06-20 16:57:51,575 INFO L495 AbstractCegarLoop]: Abstraction has has 336 places, 465 transitions, 6806 flow [2024-06-20 16:57:51,575 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 16:57:51,576 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:57:51,576 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:57:51,576 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable89 [2024-06-20 16:57:51,576 INFO L420 AbstractCegarLoop]: === Iteration 91 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:57:51,576 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:57:51,576 INFO L85 PathProgramCache]: Analyzing trace with hash 997078155, now seen corresponding path program 2 times [2024-06-20 16:57:51,576 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:57:51,576 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2043083305] [2024-06-20 16:57:51,577 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:57:51,577 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:57:51,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:57:55,083 INFO 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 16:57:55,083 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:57:55,083 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2043083305] [2024-06-20 16:57:55,083 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2043083305] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:57:55,083 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:57:55,084 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 16:57:55,084 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1749697140] [2024-06-20 16:57:55,084 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:57:55,084 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 16:57:55,084 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:57:55,084 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 16:57:55,085 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-20 16:57:55,099 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-20 16:57:55,099 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 336 places, 465 transitions, 6806 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 16:57:55,099 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:57:55,099 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-20 16:57:55,099 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:57:59,122 INFO L124 PetriNetUnfolderBase]: 7522/11923 cut-off events. [2024-06-20 16:57:59,123 INFO L125 PetriNetUnfolderBase]: For 1333450/1333456 co-relation queries the response was YES. [2024-06-20 16:57:59,232 INFO L83 FinitePrefix]: Finished finitePrefix Result has 94911 conditions, 11923 events. 7522/11923 cut-off events. For 1333450/1333456 co-relation queries the response was YES. Maximal size of possible extension queue 496. Compared 80006 event pairs, 2928 based on Foata normal form. 8/11930 useless extension candidates. Maximal degree in co-relation 94757. Up to 11396 conditions per place. [2024-06-20 16:57:59,271 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 430 selfloop transitions, 95 changer transitions 1/530 dead transitions. [2024-06-20 16:57:59,271 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 347 places, 530 transitions, 8536 flow [2024-06-20 16:57:59,272 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-20 16:57:59,272 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-20 16:57:59,272 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 189 transitions. [2024-06-20 16:57:59,272 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.375 [2024-06-20 16:57:59,272 INFO L175 Difference]: Start difference. First operand has 336 places, 465 transitions, 6806 flow. Second operand 12 states and 189 transitions. [2024-06-20 16:57:59,272 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 347 places, 530 transitions, 8536 flow [2024-06-20 16:58:01,283 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 338 places, 530 transitions, 8370 flow, removed 15 selfloop flow, removed 9 redundant places. [2024-06-20 16:58:01,289 INFO L231 Difference]: Finished difference. Result has 341 places, 486 transitions, 7300 flow [2024-06-20 16:58:01,289 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6648, PETRI_DIFFERENCE_MINUEND_PLACES=327, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=465, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=78, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=378, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=7300, PETRI_PLACES=341, PETRI_TRANSITIONS=486} [2024-06-20 16:58:01,289 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 298 predicate places. [2024-06-20 16:58:01,290 INFO L495 AbstractCegarLoop]: Abstraction has has 341 places, 486 transitions, 7300 flow [2024-06-20 16:58:01,290 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 16:58:01,290 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:58:01,290 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 16:58:01,290 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90 [2024-06-20 16:58:01,290 INFO L420 AbstractCegarLoop]: === Iteration 92 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:58:01,290 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:58:01,291 INFO L85 PathProgramCache]: Analyzing trace with hash 996841005, now seen corresponding path program 3 times [2024-06-20 16:58:01,291 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:58:01,291 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [613870554] [2024-06-20 16:58:01,291 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:58:01,291 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:58:01,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:58:04,925 INFO 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 16:58:04,925 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:58:04,926 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [613870554] [2024-06-20 16:58:04,926 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [613870554] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:58:04,926 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:58:04,926 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 16:58:04,926 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [809678558] [2024-06-20 16:58:04,926 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:58:04,926 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 16:58:04,926 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:58:04,927 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 16:58:04,927 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-20 16:58:04,941 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-20 16:58:04,941 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 341 places, 486 transitions, 7300 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 16:58:04,941 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:58:04,941 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-20 16:58:04,941 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:58:09,181 INFO L124 PetriNetUnfolderBase]: 7488/11871 cut-off events. [2024-06-20 16:58:09,181 INFO L125 PetriNetUnfolderBase]: For 1359406/1359412 co-relation queries the response was YES. [2024-06-20 16:58:09,291 INFO L83 FinitePrefix]: Finished finitePrefix Result has 94880 conditions, 11871 events. 7488/11871 cut-off events. For 1359406/1359412 co-relation queries the response was YES. Maximal size of possible extension queue 489. Compared 79628 event pairs, 2948 based on Foata normal form. 12/11882 useless extension candidates. Maximal degree in co-relation 94723. Up to 11377 conditions per place. [2024-06-20 16:58:09,329 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 433 selfloop transitions, 91 changer transitions 2/530 dead transitions. [2024-06-20 16:58:09,330 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 353 places, 530 transitions, 8472 flow [2024-06-20 16:58:09,330 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-06-20 16:58:09,330 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-06-20 16:58:09,331 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 202 transitions. [2024-06-20 16:58:09,331 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36996336996337 [2024-06-20 16:58:09,331 INFO L175 Difference]: Start difference. First operand has 341 places, 486 transitions, 7300 flow. Second operand 13 states and 202 transitions. [2024-06-20 16:58:09,331 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 353 places, 530 transitions, 8472 flow [2024-06-20 16:58:11,850 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 348 places, 530 transitions, 8384 flow, removed 17 selfloop flow, removed 5 redundant places. [2024-06-20 16:58:11,857 INFO L231 Difference]: Finished difference. Result has 349 places, 484 transitions, 7371 flow [2024-06-20 16:58:11,857 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7212, PETRI_DIFFERENCE_MINUEND_PLACES=336, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=486, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=91, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=395, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=7371, PETRI_PLACES=349, PETRI_TRANSITIONS=484} [2024-06-20 16:58:11,858 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 306 predicate places. [2024-06-20 16:58:11,858 INFO L495 AbstractCegarLoop]: Abstraction has has 349 places, 484 transitions, 7371 flow [2024-06-20 16:58:11,858 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 16:58:11,858 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:58:11,858 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 16:58:11,858 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91 [2024-06-20 16:58:11,858 INFO L420 AbstractCegarLoop]: === Iteration 93 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:58:11,859 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:58:11,859 INFO L85 PathProgramCache]: Analyzing trace with hash 1300321387, now seen corresponding path program 3 times [2024-06-20 16:58:11,859 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:58:11,859 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1301775632] [2024-06-20 16:58:11,859 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:58:11,859 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:58:11,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:58:15,525 INFO 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 16:58:15,526 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:58:15,526 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1301775632] [2024-06-20 16:58:15,526 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1301775632] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:58:15,526 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:58:15,526 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 16:58:15,527 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1438639418] [2024-06-20 16:58:15,527 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:58:15,527 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 16:58:15,527 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:58:15,527 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 16:58:15,527 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-20 16:58:15,557 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-20 16:58:15,557 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 349 places, 484 transitions, 7371 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 16:58:15,557 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:58:15,557 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-20 16:58:15,557 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:58:19,171 INFO L124 PetriNetUnfolderBase]: 7480/11868 cut-off events. [2024-06-20 16:58:19,171 INFO L125 PetriNetUnfolderBase]: For 1397112/1397114 co-relation queries the response was YES. [2024-06-20 16:58:19,660 INFO L83 FinitePrefix]: Finished finitePrefix Result has 95405 conditions, 11868 events. 7480/11868 cut-off events. For 1397112/1397114 co-relation queries the response was YES. Maximal size of possible extension queue 489. Compared 79698 event pairs, 2983 based on Foata normal form. 8/11875 useless extension candidates. Maximal degree in co-relation 95246. Up to 11454 conditions per place. [2024-06-20 16:58:19,699 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 449 selfloop transitions, 68 changer transitions 0/521 dead transitions. [2024-06-20 16:58:19,699 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 359 places, 521 transitions, 8570 flow [2024-06-20 16:58:19,700 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-20 16:58:19,700 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-20 16:58:19,701 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 166 transitions. [2024-06-20 16:58:19,701 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3593073593073593 [2024-06-20 16:58:19,701 INFO L175 Difference]: Start difference. First operand has 349 places, 484 transitions, 7371 flow. Second operand 11 states and 166 transitions. [2024-06-20 16:58:19,701 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 359 places, 521 transitions, 8570 flow [2024-06-20 16:58:22,252 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 347 places, 521 transitions, 8356 flow, removed 0 selfloop flow, removed 12 redundant places. [2024-06-20 16:58:22,262 INFO L231 Difference]: Finished difference. Result has 349 places, 487 transitions, 7351 flow [2024-06-20 16:58:22,263 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7157, PETRI_DIFFERENCE_MINUEND_PLACES=337, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=484, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=65, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=416, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=7351, PETRI_PLACES=349, PETRI_TRANSITIONS=487} [2024-06-20 16:58:22,263 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 306 predicate places. [2024-06-20 16:58:22,263 INFO L495 AbstractCegarLoop]: Abstraction has has 349 places, 487 transitions, 7351 flow [2024-06-20 16:58:22,263 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 16:58:22,263 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:58:22,263 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 16:58:22,264 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92 [2024-06-20 16:58:22,264 INFO L420 AbstractCegarLoop]: === Iteration 94 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:58:22,265 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:58:22,265 INFO L85 PathProgramCache]: Analyzing trace with hash 366105017, now seen corresponding path program 3 times [2024-06-20 16:58:22,265 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:58:22,265 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1258609088] [2024-06-20 16:58:22,265 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:58:22,265 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:58:22,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:58:25,697 INFO 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 16:58:25,697 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:58:25,697 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1258609088] [2024-06-20 16:58:25,697 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1258609088] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:58:25,698 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:58:25,698 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 16:58:25,698 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1187159592] [2024-06-20 16:58:25,698 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:58:25,698 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 16:58:25,698 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:58:25,698 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 16:58:25,699 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-20 16:58:25,717 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-20 16:58:25,718 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 349 places, 487 transitions, 7351 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 16:58:25,718 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:58:25,718 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-20 16:58:25,718 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:58:29,738 INFO L124 PetriNetUnfolderBase]: 7602/12041 cut-off events. [2024-06-20 16:58:29,739 INFO L125 PetriNetUnfolderBase]: For 1462177/1462181 co-relation queries the response was YES. [2024-06-20 16:58:29,874 INFO L83 FinitePrefix]: Finished finitePrefix Result has 98660 conditions, 12041 events. 7602/12041 cut-off events. For 1462177/1462181 co-relation queries the response was YES. Maximal size of possible extension queue 496. Compared 80653 event pairs, 2772 based on Foata normal form. 4/12044 useless extension candidates. Maximal degree in co-relation 98499. Up to 10450 conditions per place. [2024-06-20 16:58:29,916 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 318 selfloop transitions, 233 changer transitions 0/555 dead transitions. [2024-06-20 16:58:29,916 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 359 places, 555 transitions, 9743 flow [2024-06-20 16:58:29,917 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-20 16:58:29,917 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-20 16:58:29,917 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 199 transitions. [2024-06-20 16:58:29,918 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43073593073593075 [2024-06-20 16:58:29,918 INFO L175 Difference]: Start difference. First operand has 349 places, 487 transitions, 7351 flow. Second operand 11 states and 199 transitions. [2024-06-20 16:58:29,918 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 359 places, 555 transitions, 9743 flow [2024-06-20 16:58:32,237 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 352 places, 555 transitions, 9586 flow, removed 14 selfloop flow, removed 7 redundant places. [2024-06-20 16:58:32,244 INFO L231 Difference]: Finished difference. Result has 353 places, 503 transitions, 8184 flow [2024-06-20 16:58:32,245 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7194, PETRI_DIFFERENCE_MINUEND_PLACES=342, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=487, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=222, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=265, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=8184, PETRI_PLACES=353, PETRI_TRANSITIONS=503} [2024-06-20 16:58:32,245 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 310 predicate places. [2024-06-20 16:58:32,245 INFO L495 AbstractCegarLoop]: Abstraction has has 353 places, 503 transitions, 8184 flow [2024-06-20 16:58:32,245 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 16:58:32,245 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:58:32,245 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 16:58:32,246 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93 [2024-06-20 16:58:32,246 INFO L420 AbstractCegarLoop]: === Iteration 95 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:58:32,246 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:58:32,246 INFO L85 PathProgramCache]: Analyzing trace with hash -1625771627, now seen corresponding path program 4 times [2024-06-20 16:58:32,246 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:58:32,246 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1765629677] [2024-06-20 16:58:32,246 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:58:32,246 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:58:32,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:58:36,044 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 16:58:36,044 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:58:36,044 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1765629677] [2024-06-20 16:58:36,044 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1765629677] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:58:36,044 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:58:36,045 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 16:58:36,045 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1704408235] [2024-06-20 16:58:36,045 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:58:36,045 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 16:58:36,045 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:58:36,045 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 16:58:36,045 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-20 16:58:36,075 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-20 16:58:36,075 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 353 places, 503 transitions, 8184 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 16:58:36,076 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:58:36,076 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-20 16:58:36,076 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:58:40,344 INFO L124 PetriNetUnfolderBase]: 7596/12033 cut-off events. [2024-06-20 16:58:40,345 INFO L125 PetriNetUnfolderBase]: For 1504038/1504042 co-relation queries the response was YES. [2024-06-20 16:58:40,472 INFO L83 FinitePrefix]: Finished finitePrefix Result has 101315 conditions, 12033 events. 7596/12033 cut-off events. For 1504038/1504042 co-relation queries the response was YES. Maximal size of possible extension queue 495. Compared 80674 event pairs, 2782 based on Foata normal form. 4/12036 useless extension candidates. Maximal degree in co-relation 101154. Up to 10447 conditions per place. [2024-06-20 16:58:40,514 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 313 selfloop transitions, 233 changer transitions 0/550 dead transitions. [2024-06-20 16:58:40,515 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 363 places, 550 transitions, 9890 flow [2024-06-20 16:58:40,515 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-20 16:58:40,515 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-20 16:58:40,516 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 194 transitions. [2024-06-20 16:58:40,516 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4199134199134199 [2024-06-20 16:58:40,516 INFO L175 Difference]: Start difference. First operand has 353 places, 503 transitions, 8184 flow. Second operand 11 states and 194 transitions. [2024-06-20 16:58:40,516 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 363 places, 550 transitions, 9890 flow [2024-06-20 16:58:44,710 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 359 places, 550 transitions, 9541 flow, removed 123 selfloop flow, removed 4 redundant places. [2024-06-20 16:58:44,717 INFO L231 Difference]: Finished difference. Result has 360 places, 503 transitions, 8307 flow [2024-06-20 16:58:44,718 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7835, PETRI_DIFFERENCE_MINUEND_PLACES=349, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=503, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=233, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=270, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=8307, PETRI_PLACES=360, PETRI_TRANSITIONS=503} [2024-06-20 16:58:44,718 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 317 predicate places. [2024-06-20 16:58:44,718 INFO L495 AbstractCegarLoop]: Abstraction has has 360 places, 503 transitions, 8307 flow [2024-06-20 16:58:44,718 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 16:58:44,718 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:58:44,718 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 16:58:44,719 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94 [2024-06-20 16:58:44,719 INFO L420 AbstractCegarLoop]: === Iteration 96 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:58:44,719 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:58:44,719 INFO L85 PathProgramCache]: Analyzing trace with hash 995347333, now seen corresponding path program 5 times [2024-06-20 16:58:44,719 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:58:44,719 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1670001245] [2024-06-20 16:58:44,719 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:58:44,720 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:58:44,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:58:47,878 INFO 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 16:58:47,879 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:58:47,879 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1670001245] [2024-06-20 16:58:47,879 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1670001245] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:58:47,879 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:58:47,880 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 16:58:47,880 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1239485209] [2024-06-20 16:58:47,880 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:58:47,880 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 16:58:47,880 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:58:47,880 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 16:58:47,881 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-20 16:58:47,893 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-20 16:58:47,893 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 360 places, 503 transitions, 8307 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 16:58:47,893 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:58:47,893 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-20 16:58:47,893 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:58:51,956 INFO L124 PetriNetUnfolderBase]: 7590/12025 cut-off events. [2024-06-20 16:58:51,956 INFO L125 PetriNetUnfolderBase]: For 1521628/1521632 co-relation queries the response was YES. [2024-06-20 16:58:52,079 INFO L83 FinitePrefix]: Finished finitePrefix Result has 100359 conditions, 12025 events. 7590/12025 cut-off events. For 1521628/1521632 co-relation queries the response was YES. Maximal size of possible extension queue 494. Compared 80543 event pairs, 2825 based on Foata normal form. 4/12028 useless extension candidates. Maximal degree in co-relation 100196. Up to 10444 conditions per place. [2024-06-20 16:58:52,120 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 330 selfloop transitions, 230 changer transitions 0/564 dead transitions. [2024-06-20 16:58:52,120 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 371 places, 564 transitions, 10087 flow [2024-06-20 16:58:52,121 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-20 16:58:52,121 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-20 16:58:52,121 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 222 transitions. [2024-06-20 16:58:52,121 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44047619047619047 [2024-06-20 16:58:52,122 INFO L175 Difference]: Start difference. First operand has 360 places, 503 transitions, 8307 flow. Second operand 12 states and 222 transitions. [2024-06-20 16:58:52,122 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 371 places, 564 transitions, 10087 flow [2024-06-20 16:58:56,136 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 362 places, 564 transitions, 9542 flow, removed 43 selfloop flow, removed 9 redundant places. [2024-06-20 16:58:56,164 INFO L231 Difference]: Finished difference. Result has 363 places, 503 transitions, 8228 flow [2024-06-20 16:58:56,165 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7762, PETRI_DIFFERENCE_MINUEND_PLACES=351, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=503, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=230, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=273, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=8228, PETRI_PLACES=363, PETRI_TRANSITIONS=503} [2024-06-20 16:58:56,165 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 320 predicate places. [2024-06-20 16:58:56,165 INFO L495 AbstractCegarLoop]: Abstraction has has 363 places, 503 transitions, 8228 flow [2024-06-20 16:58:56,166 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 16:58:56,166 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:58:56,166 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 16:58:56,166 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable95 [2024-06-20 16:58:56,166 INFO L420 AbstractCegarLoop]: === Iteration 97 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:58:56,166 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:58:56,166 INFO L85 PathProgramCache]: Analyzing trace with hash -1625771255, now seen corresponding path program 1 times [2024-06-20 16:58:56,167 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:58:56,167 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [861779161] [2024-06-20 16:58:56,167 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:58:56,167 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:58:56,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:58:59,867 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:58:59,868 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:58:59,868 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [861779161] [2024-06-20 16:58:59,868 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [861779161] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:58:59,868 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:58:59,868 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 16:58:59,868 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [573829281] [2024-06-20 16:58:59,868 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:58:59,868 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 16:58:59,868 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:58:59,868 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 16:58:59,868 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-20 16:58:59,902 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-20 16:58:59,902 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 363 places, 503 transitions, 8228 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 16:58:59,902 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:58:59,902 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-20 16:58:59,902 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:59:04,528 INFO L124 PetriNetUnfolderBase]: 7578/11988 cut-off events. [2024-06-20 16:59:04,529 INFO L125 PetriNetUnfolderBase]: For 1544227/1544235 co-relation queries the response was YES. [2024-06-20 16:59:04,659 INFO L83 FinitePrefix]: Finished finitePrefix Result has 100181 conditions, 11988 events. 7578/11988 cut-off events. For 1544227/1544235 co-relation queries the response was YES. Maximal size of possible extension queue 492. Compared 80239 event pairs, 2985 based on Foata normal form. 12/11999 useless extension candidates. Maximal degree in co-relation 100017. Up to 11416 conditions per place. [2024-06-20 16:59:04,698 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 435 selfloop transitions, 110 changer transitions 0/549 dead transitions. [2024-06-20 16:59:04,698 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 373 places, 549 transitions, 9610 flow [2024-06-20 16:59:04,699 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-20 16:59:04,699 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-20 16:59:04,699 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 183 transitions. [2024-06-20 16:59:04,700 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3961038961038961 [2024-06-20 16:59:04,700 INFO L175 Difference]: Start difference. First operand has 363 places, 503 transitions, 8228 flow. Second operand 11 states and 183 transitions. [2024-06-20 16:59:04,700 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 373 places, 549 transitions, 9610 flow [2024-06-20 16:59:08,701 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 362 places, 549 transitions, 9097 flow, removed 23 selfloop flow, removed 11 redundant places. [2024-06-20 16:59:08,708 INFO L231 Difference]: Finished difference. Result has 363 places, 503 transitions, 7941 flow [2024-06-20 16:59:08,708 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7715, PETRI_DIFFERENCE_MINUEND_PLACES=352, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=503, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=110, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=393, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=7941, PETRI_PLACES=363, PETRI_TRANSITIONS=503} [2024-06-20 16:59:08,709 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 320 predicate places. [2024-06-20 16:59:08,709 INFO L495 AbstractCegarLoop]: Abstraction has has 363 places, 503 transitions, 7941 flow [2024-06-20 16:59:08,709 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 16:59:08,709 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:59:08,709 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 16:59:08,709 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable96 [2024-06-20 16:59:08,709 INFO L420 AbstractCegarLoop]: === Iteration 98 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:59:08,710 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:59:08,710 INFO L85 PathProgramCache]: Analyzing trace with hash 1104513793, now seen corresponding path program 4 times [2024-06-20 16:59:08,710 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:59:08,710 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1332766401] [2024-06-20 16:59:08,710 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:59:08,710 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:59:08,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:59:12,835 INFO 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 16:59:12,836 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:59:12,836 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1332766401] [2024-06-20 16:59:12,836 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1332766401] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:59:12,836 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:59:12,836 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 16:59:12,836 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [109398750] [2024-06-20 16:59:12,836 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:59:12,837 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 16:59:12,837 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:59:12,837 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 16:59:12,837 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-20 16:59:12,858 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-20 16:59:12,858 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 363 places, 503 transitions, 7941 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 16:59:12,858 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:59:12,858 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-20 16:59:12,858 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:59:17,358 INFO L124 PetriNetUnfolderBase]: 7643/12102 cut-off events. [2024-06-20 16:59:17,358 INFO L125 PetriNetUnfolderBase]: For 1583902/1583906 co-relation queries the response was YES. [2024-06-20 16:59:17,598 INFO L83 FinitePrefix]: Finished finitePrefix Result has 100301 conditions, 12102 events. 7643/12102 cut-off events. For 1583902/1583906 co-relation queries the response was YES. Maximal size of possible extension queue 503. Compared 81133 event pairs, 3022 based on Foata normal form. 8/12109 useless extension candidates. Maximal degree in co-relation 100137. Up to 11620 conditions per place. [2024-06-20 16:59:17,641 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 445 selfloop transitions, 97 changer transitions 3/549 dead transitions. [2024-06-20 16:59:17,641 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 372 places, 549 transitions, 9275 flow [2024-06-20 16:59:17,642 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 16:59:17,642 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 16:59:17,642 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 164 transitions. [2024-06-20 16:59:17,642 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3904761904761905 [2024-06-20 16:59:17,642 INFO L175 Difference]: Start difference. First operand has 363 places, 503 transitions, 7941 flow. Second operand 10 states and 164 transitions. [2024-06-20 16:59:17,642 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 372 places, 549 transitions, 9275 flow [2024-06-20 16:59:20,926 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 362 places, 549 transitions, 9023 flow, removed 5 selfloop flow, removed 10 redundant places. [2024-06-20 16:59:20,933 INFO L231 Difference]: Finished difference. Result has 365 places, 513 transitions, 8051 flow [2024-06-20 16:59:20,934 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7689, PETRI_DIFFERENCE_MINUEND_PLACES=353, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=503, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=87, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=409, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=8051, PETRI_PLACES=365, PETRI_TRANSITIONS=513} [2024-06-20 16:59:20,934 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 322 predicate places. [2024-06-20 16:59:20,934 INFO L495 AbstractCegarLoop]: Abstraction has has 365 places, 513 transitions, 8051 flow [2024-06-20 16:59:20,934 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 16:59:20,934 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:59:20,934 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 16:59:20,935 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable97 [2024-06-20 16:59:20,935 INFO L420 AbstractCegarLoop]: === Iteration 99 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:59:20,935 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:59:20,935 INFO L85 PathProgramCache]: Analyzing trace with hash 370128383, now seen corresponding path program 5 times [2024-06-20 16:59:20,935 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:59:20,935 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1294080887] [2024-06-20 16:59:20,935 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:59:20,935 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:59:20,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:59:25,010 INFO 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 16:59:25,010 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:59:25,011 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1294080887] [2024-06-20 16:59:25,011 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1294080887] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:59:25,011 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:59:25,011 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 16:59:25,011 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [103503496] [2024-06-20 16:59:25,011 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:59:25,011 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 16:59:25,011 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:59:25,011 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 16:59:25,011 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-20 16:59:25,030 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-20 16:59:25,031 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 365 places, 513 transitions, 8051 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 16:59:25,031 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:59:25,031 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-20 16:59:25,031 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:59:29,465 INFO L124 PetriNetUnfolderBase]: 7750/12275 cut-off events. [2024-06-20 16:59:29,466 INFO L125 PetriNetUnfolderBase]: For 1641522/1641526 co-relation queries the response was YES. [2024-06-20 16:59:29,596 INFO L83 FinitePrefix]: Finished finitePrefix Result has 102262 conditions, 12275 events. 7750/12275 cut-off events. For 1641522/1641526 co-relation queries the response was YES. Maximal size of possible extension queue 520. Compared 82460 event pairs, 2990 based on Foata normal form. 8/12282 useless extension candidates. Maximal degree in co-relation 102095. Up to 11609 conditions per place. [2024-06-20 16:59:29,637 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 433 selfloop transitions, 126 changer transitions 1/564 dead transitions. [2024-06-20 16:59:29,637 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 374 places, 564 transitions, 9704 flow [2024-06-20 16:59:29,638 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 16:59:29,638 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 16:59:29,638 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 166 transitions. [2024-06-20 16:59:29,638 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3952380952380952 [2024-06-20 16:59:29,638 INFO L175 Difference]: Start difference. First operand has 365 places, 513 transitions, 8051 flow. Second operand 10 states and 166 transitions. [2024-06-20 16:59:29,639 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 374 places, 564 transitions, 9704 flow