./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/pthread-wmm/mix046.opt.i --full-output --witness-type correctness_witness --witnessparser.only.consider.loop.invariants false --cacsl2boogietranslator.check.unreachability.of.reach_error.function false --validate ./goblint.2024-05-21_14-57-05.files/protection/mix046.opt.yml/witness.yml --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version cde23df1 Calling Ultimate with: /root/.sdkman/candidates/java/current/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReachWitnessValidation.xml -i ../../../trunk/examples/svcomp/pthread-wmm/mix046.opt.i ./goblint.2024-05-21_14-57-05.files/protection/mix046.opt.yml/witness.yml -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --traceabstraction.compute.hoare.annotation.of.negated.interpolant.automaton,.abstraction.and.cfg false --witnessparser.only.consider.loop.invariants false --cacsl2boogietranslator.check.unreachability.of.reach_error.function false --- Real Ultimate output --- This is Ultimate 0.2.4-tmp.fs.goblint-validation-cde23df-m [2024-06-14 12:32:55,056 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-06-14 12:32:55,113 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-06-14 12:32:55,117 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-06-14 12:32:55,118 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-06-14 12:32:55,138 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-06-14 12:32:55,139 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-06-14 12:32:55,140 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-06-14 12:32:55,140 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-06-14 12:32:55,144 INFO L153 SettingsManager]: * Use memory slicer=true [2024-06-14 12:32:55,144 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-06-14 12:32:55,145 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-06-14 12:32:55,146 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-06-14 12:32:55,147 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-06-14 12:32:55,147 INFO L153 SettingsManager]: * Use SBE=true [2024-06-14 12:32:55,147 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-06-14 12:32:55,147 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-06-14 12:32:55,147 INFO L153 SettingsManager]: * sizeof long=4 [2024-06-14 12:32:55,148 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-06-14 12:32:55,148 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-06-14 12:32:55,148 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-06-14 12:32:55,148 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-06-14 12:32:55,149 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-06-14 12:32:55,149 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-06-14 12:32:55,149 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-06-14 12:32:55,149 INFO L153 SettingsManager]: * sizeof long double=12 [2024-06-14 12:32:55,149 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-06-14 12:32:55,150 INFO L153 SettingsManager]: * Use constant arrays=true [2024-06-14 12:32:55,150 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-06-14 12:32:55,150 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-06-14 12:32:55,151 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-06-14 12:32:55,151 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-06-14 12:32:55,151 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-14 12:32:55,151 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-06-14 12:32:55,152 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-06-14 12:32:55,152 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-06-14 12:32:55,152 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-06-14 12:32:55,152 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-06-14 12:32:55,152 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-06-14 12:32:55,152 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-06-14 12:32:55,153 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-06-14 12:32:55,153 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-06-14 12:32:55,153 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-06-14 12:32:55,153 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check unreachability of reach_error function -> false [2024-06-14 12:32:55,381 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-06-14 12:32:55,400 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-06-14 12:32:55,402 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-06-14 12:32:55,403 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-06-14 12:32:55,404 INFO L274 PluginConnector]: Witness Parser initialized [2024-06-14 12:32:55,405 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/./goblint.2024-05-21_14-57-05.files/protection/mix046.opt.yml/witness.yml [2024-06-14 12:32:55,578 INFO L270 PluginConnector]: Initializing CDTParser... [2024-06-14 12:32:55,578 INFO L274 PluginConnector]: CDTParser initialized [2024-06-14 12:32:55,579 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-wmm/mix046.opt.i [2024-06-14 12:32:56,554 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-06-14 12:32:56,725 INFO L384 CDTParser]: Found 1 translation units. [2024-06-14 12:32:56,727 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/mix046.opt.i [2024-06-14 12:32:56,737 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9e6ed6c3e/30d84d37ed23433f91b92946fcf51a4f/FLAGf3398c093 [2024-06-14 12:32:56,750 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9e6ed6c3e/30d84d37ed23433f91b92946fcf51a4f [2024-06-14 12:32:56,751 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-06-14 12:32:56,753 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-06-14 12:32:56,755 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-06-14 12:32:56,755 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-06-14 12:32:56,758 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-06-14 12:32:56,759 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 14.06 12:32:55" (1/2) ... [2024-06-14 12:32:56,760 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7d7adb54 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 14.06 12:32:56, skipping insertion in model container [2024-06-14 12:32:56,760 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 14.06 12:32:55" (1/2) ... [2024-06-14 12:32:56,761 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@260c4275 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 14.06 12:32:56, skipping insertion in model container [2024-06-14 12:32:56,761 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.06 12:32:56" (2/2) ... [2024-06-14 12:32:56,761 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7d7adb54 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.06 12:32:56, skipping insertion in model container [2024-06-14 12:32:56,762 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.06 12:32:56" (2/2) ... [2024-06-14 12:32:56,762 INFO L83 nessWitnessExtractor]: Extracting all invariants from correctness witness [2024-06-14 12:32:56,869 INFO L95 edCorrectnessWitness]: Found the following entries in the witness: [2024-06-14 12:32:56,869 INFO L97 edCorrectnessWitness]: Location invariant before [L853-L853] ((((((((((((((((((((((! multithreaded || z$r_buff1_thd1 == (_Bool)0) && (! multithreaded || z$read_delayed == (_Bool)0)) && (! multithreaded || ((((0 <= z$w_buff1 && z$w_buff1 <= 2) && z$w_buff1 <= 127) && z$w_buff1 % 2 == 0) && (z$w_buff1 == 0 || z$w_buff1 == 2)))) && (! multithreaded || (((0 <= z$mem_tmp && z$mem_tmp <= 2) && z$mem_tmp <= 127) && ((z$mem_tmp == 0 || z$mem_tmp == 1) || z$mem_tmp == 2)))) && (! multithreaded || z$flush_delayed == (_Bool)0)) && (! multithreaded || z$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p3_EAX && __unbuffered_p3_EAX <= 1) && (__unbuffered_p3_EAX == 0 || __unbuffered_p3_EAX == 1)))) && (! multithreaded || (((0 <= z && z <= 2) && z <= 127) && ((z == 0 || z == 1) || z == 2)))) && (! multithreaded || ((0 <= x && x <= 1) && (x == 0 || x == 1)))) && (! multithreaded || ((0 <= __unbuffered_p0_EAX && __unbuffered_p0_EAX <= 1) && (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1)))) && (! multithreaded || z$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || ((0 <= b && b <= 1) && (b == 0 || b == 1)))) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || (((0 <= y && y <= 2) && y <= 127) && ((y == 0 || y == 1) || y == 2)))) && (! multithreaded || z$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p3_EBX && __unbuffered_p3_EBX <= 1) && (__unbuffered_p3_EBX == 0 || __unbuffered_p3_EBX == 1)))) && (! multithreaded || ((((0 <= z$w_buff0 && z$w_buff0 <= 2) && z$w_buff0 <= 127) && z$w_buff0 % 2 == 0) && (z$w_buff0 == 0 || z$w_buff0 == 2)))) && (! multithreaded || ((0 <= a && a <= 1) && (a == 0 || a == 1)))) && (! multithreaded || z$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || z$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || z$read_delayed_var == 0)) && (! multithreaded || z$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || z$r_buff0_thd3 == (_Bool)0) [2024-06-14 12:32:56,870 INFO L97 edCorrectnessWitness]: Location invariant before [L849-L849] ((((((((((((((((((((((! multithreaded || z$r_buff1_thd1 == (_Bool)0) && (! multithreaded || z$read_delayed == (_Bool)0)) && (! multithreaded || ((((0 <= z$w_buff1 && z$w_buff1 <= 2) && z$w_buff1 <= 127) && z$w_buff1 % 2 == 0) && (z$w_buff1 == 0 || z$w_buff1 == 2)))) && (! multithreaded || (((0 <= z$mem_tmp && z$mem_tmp <= 2) && z$mem_tmp <= 127) && ((z$mem_tmp == 0 || z$mem_tmp == 1) || z$mem_tmp == 2)))) && (! multithreaded || z$flush_delayed == (_Bool)0)) && (! multithreaded || z$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p3_EAX && __unbuffered_p3_EAX <= 1) && (__unbuffered_p3_EAX == 0 || __unbuffered_p3_EAX == 1)))) && (! multithreaded || (((0 <= z && z <= 2) && z <= 127) && ((z == 0 || z == 1) || z == 2)))) && (! multithreaded || ((0 <= x && x <= 1) && (x == 0 || x == 1)))) && (! multithreaded || ((0 <= __unbuffered_p0_EAX && __unbuffered_p0_EAX <= 1) && (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1)))) && (! multithreaded || z$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || ((0 <= b && b <= 1) && (b == 0 || b == 1)))) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || (((0 <= y && y <= 2) && y <= 127) && ((y == 0 || y == 1) || y == 2)))) && (! multithreaded || z$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p3_EBX && __unbuffered_p3_EBX <= 1) && (__unbuffered_p3_EBX == 0 || __unbuffered_p3_EBX == 1)))) && (! multithreaded || ((((0 <= z$w_buff0 && z$w_buff0 <= 2) && z$w_buff0 <= 127) && z$w_buff0 % 2 == 0) && (z$w_buff0 == 0 || z$w_buff0 == 2)))) && (! multithreaded || ((0 <= a && a <= 1) && (a == 0 || a == 1)))) && (! multithreaded || z$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || z$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || z$read_delayed_var == 0)) && (! multithreaded || z$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || z$r_buff0_thd3 == (_Bool)0) [2024-06-14 12:32:56,870 INFO L97 edCorrectnessWitness]: Location invariant before [L851-L851] ((((((((((((((((((((((! multithreaded || z$r_buff1_thd1 == (_Bool)0) && (! multithreaded || z$read_delayed == (_Bool)0)) && (! multithreaded || ((((0 <= z$w_buff1 && z$w_buff1 <= 2) && z$w_buff1 <= 127) && z$w_buff1 % 2 == 0) && (z$w_buff1 == 0 || z$w_buff1 == 2)))) && (! multithreaded || (((0 <= z$mem_tmp && z$mem_tmp <= 2) && z$mem_tmp <= 127) && ((z$mem_tmp == 0 || z$mem_tmp == 1) || z$mem_tmp == 2)))) && (! multithreaded || z$flush_delayed == (_Bool)0)) && (! multithreaded || z$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p3_EAX && __unbuffered_p3_EAX <= 1) && (__unbuffered_p3_EAX == 0 || __unbuffered_p3_EAX == 1)))) && (! multithreaded || (((0 <= z && z <= 2) && z <= 127) && ((z == 0 || z == 1) || z == 2)))) && (! multithreaded || ((0 <= x && x <= 1) && (x == 0 || x == 1)))) && (! multithreaded || ((0 <= __unbuffered_p0_EAX && __unbuffered_p0_EAX <= 1) && (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1)))) && (! multithreaded || z$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || ((0 <= b && b <= 1) && (b == 0 || b == 1)))) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || (((0 <= y && y <= 2) && y <= 127) && ((y == 0 || y == 1) || y == 2)))) && (! multithreaded || z$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p3_EBX && __unbuffered_p3_EBX <= 1) && (__unbuffered_p3_EBX == 0 || __unbuffered_p3_EBX == 1)))) && (! multithreaded || ((((0 <= z$w_buff0 && z$w_buff0 <= 2) && z$w_buff0 <= 127) && z$w_buff0 % 2 == 0) && (z$w_buff0 == 0 || z$w_buff0 == 2)))) && (! multithreaded || ((0 <= a && a <= 1) && (a == 0 || a == 1)))) && (! multithreaded || z$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || z$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || z$read_delayed_var == 0)) && (! multithreaded || z$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || z$r_buff0_thd3 == (_Bool)0) [2024-06-14 12:32:56,870 INFO L97 edCorrectnessWitness]: Location invariant before [L854-L854] ((((((((((((((((((((((! multithreaded || z$r_buff1_thd1 == (_Bool)0) && (! multithreaded || z$read_delayed == (_Bool)0)) && (! multithreaded || ((((0 <= z$w_buff1 && z$w_buff1 <= 2) && z$w_buff1 <= 127) && z$w_buff1 % 2 == 0) && (z$w_buff1 == 0 || z$w_buff1 == 2)))) && (! multithreaded || (((0 <= z$mem_tmp && z$mem_tmp <= 2) && z$mem_tmp <= 127) && ((z$mem_tmp == 0 || z$mem_tmp == 1) || z$mem_tmp == 2)))) && (! multithreaded || z$flush_delayed == (_Bool)0)) && (! multithreaded || z$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p3_EAX && __unbuffered_p3_EAX <= 1) && (__unbuffered_p3_EAX == 0 || __unbuffered_p3_EAX == 1)))) && (! multithreaded || (((0 <= z && z <= 2) && z <= 127) && ((z == 0 || z == 1) || z == 2)))) && (! multithreaded || ((0 <= x && x <= 1) && (x == 0 || x == 1)))) && (! multithreaded || ((0 <= __unbuffered_p0_EAX && __unbuffered_p0_EAX <= 1) && (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1)))) && (! multithreaded || z$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || ((0 <= b && b <= 1) && (b == 0 || b == 1)))) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || (((0 <= y && y <= 2) && y <= 127) && ((y == 0 || y == 1) || y == 2)))) && (! multithreaded || z$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p3_EBX && __unbuffered_p3_EBX <= 1) && (__unbuffered_p3_EBX == 0 || __unbuffered_p3_EBX == 1)))) && (! multithreaded || ((((0 <= z$w_buff0 && z$w_buff0 <= 2) && z$w_buff0 <= 127) && z$w_buff0 % 2 == 0) && (z$w_buff0 == 0 || z$w_buff0 == 2)))) && (! multithreaded || ((0 <= a && a <= 1) && (a == 0 || a == 1)))) && (! multithreaded || z$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || z$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || z$read_delayed_var == 0)) && (! multithreaded || z$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || z$r_buff0_thd3 == (_Bool)0) [2024-06-14 12:32:56,870 INFO L103 edCorrectnessWitness]: ghost_variable multithreaded = 0 [2024-06-14 12:32:56,870 INFO L106 edCorrectnessWitness]: ghost_update [L847-L847] multithreaded = 1; [2024-06-14 12:32:56,906 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-06-14 12:32:57,202 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-14 12:32:57,210 INFO L202 MainTranslator]: Completed pre-run Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local [2024-06-14 12:32:57,338 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-14 12:32:57,378 INFO L206 MainTranslator]: Completed translation [2024-06-14 12:32:57,379 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.06 12:32:57 WrapperNode [2024-06-14 12:32:57,379 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-06-14 12:32:57,380 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-06-14 12:32:57,380 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-06-14 12:32:57,381 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-06-14 12:32:57,386 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.06 12:32:57" (1/1) ... [2024-06-14 12:32:57,412 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.06 12:32:57" (1/1) ... [2024-06-14 12:32:57,449 INFO L138 Inliner]: procedures = 176, calls = 56, calls flagged for inlining = 6, calls inlined = 7, statements flattened = 164 [2024-06-14 12:32:57,449 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-06-14 12:32:57,450 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-06-14 12:32:57,450 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-06-14 12:32:57,451 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-06-14 12:32:57,475 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.06 12:32:57" (1/1) ... [2024-06-14 12:32:57,475 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.06 12:32:57" (1/1) ... [2024-06-14 12:32:57,490 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.06 12:32:57" (1/1) ... [2024-06-14 12:32:57,559 INFO L175 MemorySlicer]: Split 2 memory accesses to 1 slices as follows [2]. 100 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2]. The 0 writes are split as follows [0]. [2024-06-14 12:32:57,559 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.06 12:32:57" (1/1) ... [2024-06-14 12:32:57,560 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.06 12:32:57" (1/1) ... [2024-06-14 12:32:57,570 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.06 12:32:57" (1/1) ... [2024-06-14 12:32:57,572 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.06 12:32:57" (1/1) ... [2024-06-14 12:32:57,576 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.06 12:32:57" (1/1) ... [2024-06-14 12:32:57,580 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.06 12:32:57" (1/1) ... [2024-06-14 12:32:57,585 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-06-14 12:32:57,586 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-06-14 12:32:57,586 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-06-14 12:32:57,586 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-06-14 12:32:57,586 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.06 12:32:57" (1/1) ... [2024-06-14 12:32:57,594 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-14 12:32:57,599 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-14 12:32:57,614 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-06-14 12:32:57,619 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-06-14 12:32:57,639 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-06-14 12:32:57,640 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-06-14 12:32:57,640 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2024-06-14 12:32:57,640 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2024-06-14 12:32:57,640 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2024-06-14 12:32:57,641 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2024-06-14 12:32:57,641 INFO L130 BoogieDeclarations]: Found specification of procedure P2 [2024-06-14 12:32:57,641 INFO L138 BoogieDeclarations]: Found implementation of procedure P2 [2024-06-14 12:32:57,641 INFO L130 BoogieDeclarations]: Found specification of procedure P3 [2024-06-14 12:32:57,641 INFO L138 BoogieDeclarations]: Found implementation of procedure P3 [2024-06-14 12:32:57,642 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-06-14 12:32:57,642 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-06-14 12:32:57,642 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-06-14 12:32:57,642 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-06-14 12:32:57,644 WARN L214 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2024-06-14 12:32:57,773 INFO L244 CfgBuilder]: Building ICFG [2024-06-14 12:32:57,774 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-06-14 12:32:58,114 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-06-14 12:32:58,114 INFO L293 CfgBuilder]: Performing block encoding [2024-06-14 12:32:58,256 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-06-14 12:32:58,256 INFO L320 CfgBuilder]: Removed 0 assume(true) statements. [2024-06-14 12:32:58,257 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.06 12:32:58 BoogieIcfgContainer [2024-06-14 12:32:58,257 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-06-14 12:32:58,260 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-06-14 12:32:58,260 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-06-14 12:32:58,262 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-06-14 12:32:58,262 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 14.06 12:32:55" (1/4) ... [2024-06-14 12:32:58,263 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@37751c01 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 14.06 12:32:58, skipping insertion in model container [2024-06-14 12:32:58,263 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.06 12:32:56" (2/4) ... [2024-06-14 12:32:58,263 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@37751c01 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.06 12:32:58, skipping insertion in model container [2024-06-14 12:32:58,263 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.06 12:32:57" (3/4) ... [2024-06-14 12:32:58,263 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@37751c01 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.06 12:32:58, skipping insertion in model container [2024-06-14 12:32:58,264 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.06 12:32:58" (4/4) ... [2024-06-14 12:32:58,264 INFO L112 eAbstractionObserver]: Analyzing ICFG mix046.opt.i [2024-06-14 12:32:58,277 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-06-14 12:32:58,277 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 4 error locations. [2024-06-14 12:32:58,277 INFO L522 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-06-14 12:32:58,320 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-06-14 12:32:58,347 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 67 places, 54 transitions, 124 flow [2024-06-14 12:32:58,377 INFO L124 PetriNetUnfolderBase]: 0/50 cut-off events. [2024-06-14 12:32:58,377 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-14 12:32:58,380 INFO L83 FinitePrefix]: Finished finitePrefix Result has 63 conditions, 50 events. 0/50 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 87 event pairs, 0 based on Foata normal form. 0/46 useless extension candidates. Maximal degree in co-relation 0. Up to 1 conditions per place. [2024-06-14 12:32:58,380 INFO L82 GeneralOperation]: Start removeDead. Operand has 67 places, 54 transitions, 124 flow [2024-06-14 12:32:58,383 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 57 places, 44 transitions, 100 flow [2024-06-14 12:32:58,394 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-06-14 12:32:58,401 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;@9c9cb66, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-06-14 12:32:58,401 INFO L358 AbstractCegarLoop]: Starting to check reachability of 8 error locations. [2024-06-14 12:32:58,406 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-06-14 12:32:58,406 INFO L124 PetriNetUnfolderBase]: 0/7 cut-off events. [2024-06-14 12:32:58,406 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-14 12:32:58,407 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:32:58,407 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2024-06-14 12:32:58,407 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 12:32:58,411 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:32:58,412 INFO L85 PathProgramCache]: Analyzing trace with hash -958275556, now seen corresponding path program 1 times [2024-06-14 12:32:58,419 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:32:58,419 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1427320448] [2024-06-14 12:32:58,420 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:32:58,420 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:32:58,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:32:59,523 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:32:59,524 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:32:59,524 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1427320448] [2024-06-14 12:32:59,525 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1427320448] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:32:59,525 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:32:59,525 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-06-14 12:32:59,527 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1517683254] [2024-06-14 12:32:59,527 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:32:59,533 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-06-14 12:32:59,537 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:32:59,559 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-06-14 12:32:59,560 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-06-14 12:32:59,601 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 54 [2024-06-14 12:32:59,604 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 57 places, 44 transitions, 100 flow. Second operand has 3 states, 3 states have (on average 17.0) internal successors, (51), 3 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:32:59,604 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:32:59,604 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 54 [2024-06-14 12:32:59,605 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:33:00,817 INFO L124 PetriNetUnfolderBase]: 7499/10764 cut-off events. [2024-06-14 12:33:00,818 INFO L125 PetriNetUnfolderBase]: For 141/141 co-relation queries the response was YES. [2024-06-14 12:33:00,837 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21294 conditions, 10764 events. 7499/10764 cut-off events. For 141/141 co-relation queries the response was YES. Maximal size of possible extension queue 429. Compared 62389 event pairs, 5548 based on Foata normal form. 1/10487 useless extension candidates. Maximal degree in co-relation 21278. Up to 10221 conditions per place. [2024-06-14 12:33:00,886 INFO L140 encePairwiseOnDemand]: 45/54 looper letters, 44 selfloop transitions, 5 changer transitions 0/58 dead transitions. [2024-06-14 12:33:00,887 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 59 places, 58 transitions, 235 flow [2024-06-14 12:33:00,888 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-06-14 12:33:00,890 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-06-14 12:33:00,895 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 98 transitions. [2024-06-14 12:33:00,897 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6049382716049383 [2024-06-14 12:33:00,898 INFO L175 Difference]: Start difference. First operand has 57 places, 44 transitions, 100 flow. Second operand 3 states and 98 transitions. [2024-06-14 12:33:00,899 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 59 places, 58 transitions, 235 flow [2024-06-14 12:33:00,902 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 55 places, 58 transitions, 228 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-06-14 12:33:00,906 INFO L231 Difference]: Finished difference. Result has 56 places, 48 transitions, 135 flow [2024-06-14 12:33:00,908 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=96, PETRI_DIFFERENCE_MINUEND_PLACES=53, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=44, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=135, PETRI_PLACES=56, PETRI_TRANSITIONS=48} [2024-06-14 12:33:00,910 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, -1 predicate places. [2024-06-14 12:33:00,911 INFO L495 AbstractCegarLoop]: Abstraction has has 56 places, 48 transitions, 135 flow [2024-06-14 12:33:00,911 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 17.0) internal successors, (51), 3 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:33:00,911 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:33:00,911 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:33:00,912 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-06-14 12:33:00,912 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 12:33:00,912 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:33:00,912 INFO L85 PathProgramCache]: Analyzing trace with hash -1779786437, now seen corresponding path program 1 times [2024-06-14 12:33:00,913 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:33:00,913 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [401689724] [2024-06-14 12:33:00,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:33:00,913 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:33:00,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:33:01,866 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:33:01,867 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:33:01,867 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [401689724] [2024-06-14 12:33:01,867 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [401689724] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:33:01,868 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:33:01,868 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-06-14 12:33:01,868 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [171631684] [2024-06-14 12:33:01,868 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:33:01,870 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-14 12:33:01,870 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:33:01,871 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-14 12:33:01,871 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-06-14 12:33:01,944 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 54 [2024-06-14 12:33:01,944 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 48 transitions, 135 flow. Second operand has 4 states, 4 states have (on average 15.75) internal successors, (63), 4 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:33:01,945 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:33:01,945 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 54 [2024-06-14 12:33:01,945 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:33:03,121 INFO L124 PetriNetUnfolderBase]: 8587/11978 cut-off events. [2024-06-14 12:33:03,122 INFO L125 PetriNetUnfolderBase]: For 2357/2357 co-relation queries the response was YES. [2024-06-14 12:33:03,143 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27187 conditions, 11978 events. 8587/11978 cut-off events. For 2357/2357 co-relation queries the response was YES. Maximal size of possible extension queue 480. Compared 67267 event pairs, 5485 based on Foata normal form. 4/11858 useless extension candidates. Maximal degree in co-relation 27172. Up to 11644 conditions per place. [2024-06-14 12:33:03,205 INFO L140 encePairwiseOnDemand]: 44/54 looper letters, 55 selfloop transitions, 9 changer transitions 0/72 dead transitions. [2024-06-14 12:33:03,206 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 59 places, 72 transitions, 329 flow [2024-06-14 12:33:03,206 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-14 12:33:03,206 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-14 12:33:03,209 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 124 transitions. [2024-06-14 12:33:03,210 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5740740740740741 [2024-06-14 12:33:03,210 INFO L175 Difference]: Start difference. First operand has 56 places, 48 transitions, 135 flow. Second operand 4 states and 124 transitions. [2024-06-14 12:33:03,210 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 59 places, 72 transitions, 329 flow [2024-06-14 12:33:03,212 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 58 places, 72 transitions, 324 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-06-14 12:33:03,214 INFO L231 Difference]: Finished difference. Result has 59 places, 52 transitions, 183 flow [2024-06-14 12:33:03,214 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=130, PETRI_DIFFERENCE_MINUEND_PLACES=55, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=48, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=183, PETRI_PLACES=59, PETRI_TRANSITIONS=52} [2024-06-14 12:33:03,215 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 2 predicate places. [2024-06-14 12:33:03,215 INFO L495 AbstractCegarLoop]: Abstraction has has 59 places, 52 transitions, 183 flow [2024-06-14 12:33:03,217 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 15.75) internal successors, (63), 4 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:33:03,217 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:33:03,218 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:33:03,218 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-06-14 12:33:03,219 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 12:33:03,227 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:33:03,227 INFO L85 PathProgramCache]: Analyzing trace with hash -245745662, now seen corresponding path program 1 times [2024-06-14 12:33:03,227 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:33:03,228 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [295152978] [2024-06-14 12:33:03,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:33:03,228 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:33:03,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:33:04,181 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:33:04,182 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:33:04,182 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [295152978] [2024-06-14 12:33:04,182 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [295152978] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:33:04,182 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:33:04,182 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-14 12:33:04,183 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [713684459] [2024-06-14 12:33:04,183 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:33:04,183 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-14 12:33:04,183 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:33:04,184 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-14 12:33:04,184 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-14 12:33:04,249 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 54 [2024-06-14 12:33:04,250 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 59 places, 52 transitions, 183 flow. Second operand has 6 states, 6 states have (on average 14.5) internal successors, (87), 6 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:33:04,250 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:33:04,250 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 54 [2024-06-14 12:33:04,250 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:33:05,700 INFO L124 PetriNetUnfolderBase]: 10906/15114 cut-off events. [2024-06-14 12:33:05,700 INFO L125 PetriNetUnfolderBase]: For 7999/7999 co-relation queries the response was YES. [2024-06-14 12:33:05,724 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37884 conditions, 15114 events. 10906/15114 cut-off events. For 7999/7999 co-relation queries the response was YES. Maximal size of possible extension queue 537. Compared 83293 event pairs, 5494 based on Foata normal form. 8/14965 useless extension candidates. Maximal degree in co-relation 37867. Up to 14662 conditions per place. [2024-06-14 12:33:05,783 INFO L140 encePairwiseOnDemand]: 43/54 looper letters, 73 selfloop transitions, 16 changer transitions 0/96 dead transitions. [2024-06-14 12:33:05,783 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 63 places, 96 transitions, 494 flow [2024-06-14 12:33:05,784 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 12:33:05,784 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 12:33:05,785 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 171 transitions. [2024-06-14 12:33:05,785 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5277777777777778 [2024-06-14 12:33:05,785 INFO L175 Difference]: Start difference. First operand has 59 places, 52 transitions, 183 flow. Second operand 6 states and 171 transitions. [2024-06-14 12:33:05,785 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 63 places, 96 transitions, 494 flow [2024-06-14 12:33:05,787 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 61 places, 96 transitions, 466 flow, removed 6 selfloop flow, removed 2 redundant places. [2024-06-14 12:33:05,788 INFO L231 Difference]: Finished difference. Result has 63 places, 58 transitions, 245 flow [2024-06-14 12:33:05,789 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=158, PETRI_DIFFERENCE_MINUEND_PLACES=56, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=51, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=245, PETRI_PLACES=63, PETRI_TRANSITIONS=58} [2024-06-14 12:33:05,790 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 6 predicate places. [2024-06-14 12:33:05,790 INFO L495 AbstractCegarLoop]: Abstraction has has 63 places, 58 transitions, 245 flow [2024-06-14 12:33:05,790 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 14.5) internal successors, (87), 6 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:33:05,790 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:33:05,790 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:33:05,790 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-06-14 12:33:05,791 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 12:33:05,791 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:33:05,791 INFO L85 PathProgramCache]: Analyzing trace with hash -447725699, now seen corresponding path program 1 times [2024-06-14 12:33:05,791 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:33:05,792 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1544764032] [2024-06-14 12:33:05,792 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:33:05,792 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:33:05,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:33:06,758 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:33:06,759 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:33:06,762 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1544764032] [2024-06-14 12:33:06,762 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1544764032] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:33:06,762 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:33:06,763 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-14 12:33:06,763 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [990312976] [2024-06-14 12:33:06,763 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:33:06,763 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-14 12:33:06,764 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:33:06,765 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-14 12:33:06,765 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-06-14 12:33:06,835 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 54 [2024-06-14 12:33:06,836 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 58 transitions, 245 flow. Second operand has 6 states, 6 states have (on average 14.666666666666666) internal successors, (88), 6 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:33:06,836 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:33:06,836 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 54 [2024-06-14 12:33:06,836 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:33:08,339 INFO L124 PetriNetUnfolderBase]: 9502/13557 cut-off events. [2024-06-14 12:33:08,339 INFO L125 PetriNetUnfolderBase]: For 13319/13319 co-relation queries the response was YES. [2024-06-14 12:33:08,357 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37023 conditions, 13557 events. 9502/13557 cut-off events. For 13319/13319 co-relation queries the response was YES. Maximal size of possible extension queue 482. Compared 77625 event pairs, 5228 based on Foata normal form. 3/13408 useless extension candidates. Maximal degree in co-relation 37004. Up to 12874 conditions per place. [2024-06-14 12:33:08,396 INFO L140 encePairwiseOnDemand]: 44/54 looper letters, 61 selfloop transitions, 10 changer transitions 0/79 dead transitions. [2024-06-14 12:33:08,397 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 67 places, 79 transitions, 453 flow [2024-06-14 12:33:08,397 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-14 12:33:08,397 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-14 12:33:08,398 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 128 transitions. [2024-06-14 12:33:08,398 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4740740740740741 [2024-06-14 12:33:08,398 INFO L175 Difference]: Start difference. First operand has 63 places, 58 transitions, 245 flow. Second operand 5 states and 128 transitions. [2024-06-14 12:33:08,398 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 67 places, 79 transitions, 453 flow [2024-06-14 12:33:08,401 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 79 transitions, 415 flow, removed 6 selfloop flow, removed 3 redundant places. [2024-06-14 12:33:08,402 INFO L231 Difference]: Finished difference. Result has 65 places, 62 transitions, 268 flow [2024-06-14 12:33:08,403 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=207, PETRI_DIFFERENCE_MINUEND_PLACES=60, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=58, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=268, PETRI_PLACES=65, PETRI_TRANSITIONS=62} [2024-06-14 12:33:08,403 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 8 predicate places. [2024-06-14 12:33:08,403 INFO L495 AbstractCegarLoop]: Abstraction has has 65 places, 62 transitions, 268 flow [2024-06-14 12:33:08,404 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 14.666666666666666) internal successors, (88), 6 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:33:08,404 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:33:08,404 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:33:08,404 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-06-14 12:33:08,404 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 12:33:08,404 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:33:08,404 INFO L85 PathProgramCache]: Analyzing trace with hash -971355891, now seen corresponding path program 1 times [2024-06-14 12:33:08,405 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:33:08,405 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1493776556] [2024-06-14 12:33:08,405 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:33:08,405 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:33:08,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:33:09,331 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:33:09,332 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:33:09,332 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1493776556] [2024-06-14 12:33:09,332 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1493776556] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:33:09,332 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:33:09,332 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 12:33:09,333 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1593967375] [2024-06-14 12:33:09,333 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:33:09,333 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 12:33:09,333 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:33:09,334 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 12:33:09,334 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-14 12:33:09,403 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 54 [2024-06-14 12:33:09,403 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 65 places, 62 transitions, 268 flow. Second operand has 7 states, 7 states have (on average 14.571428571428571) internal successors, (102), 7 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:33:09,403 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:33:09,403 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 54 [2024-06-14 12:33:09,403 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:33:10,835 INFO L124 PetriNetUnfolderBase]: 9514/13591 cut-off events. [2024-06-14 12:33:10,835 INFO L125 PetriNetUnfolderBase]: For 20419/20419 co-relation queries the response was YES. [2024-06-14 12:33:10,869 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40323 conditions, 13591 events. 9514/13591 cut-off events. For 20419/20419 co-relation queries the response was YES. Maximal size of possible extension queue 481. Compared 77800 event pairs, 5008 based on Foata normal form. 5/13448 useless extension candidates. Maximal degree in co-relation 40302. Up to 12824 conditions per place. [2024-06-14 12:33:10,925 INFO L140 encePairwiseOnDemand]: 42/54 looper letters, 74 selfloop transitions, 22 changer transitions 0/104 dead transitions. [2024-06-14 12:33:10,926 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 70 places, 104 transitions, 642 flow [2024-06-14 12:33:10,926 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 12:33:10,926 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 12:33:10,927 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 160 transitions. [2024-06-14 12:33:10,927 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49382716049382713 [2024-06-14 12:33:10,927 INFO L175 Difference]: Start difference. First operand has 65 places, 62 transitions, 268 flow. Second operand 6 states and 160 transitions. [2024-06-14 12:33:10,927 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 70 places, 104 transitions, 642 flow [2024-06-14 12:33:10,933 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 67 places, 104 transitions, 613 flow, removed 7 selfloop flow, removed 3 redundant places. [2024-06-14 12:33:10,934 INFO L231 Difference]: Finished difference. Result has 70 places, 76 transitions, 409 flow [2024-06-14 12:33:10,935 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=239, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=62, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=409, PETRI_PLACES=70, PETRI_TRANSITIONS=76} [2024-06-14 12:33:10,935 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 13 predicate places. [2024-06-14 12:33:10,936 INFO L495 AbstractCegarLoop]: Abstraction has has 70 places, 76 transitions, 409 flow [2024-06-14 12:33:10,936 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 14.571428571428571) internal successors, (102), 7 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:33:10,936 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:33:10,936 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:33:10,936 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-06-14 12:33:10,937 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 12:33:10,937 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:33:10,937 INFO L85 PathProgramCache]: Analyzing trace with hash -773327844, now seen corresponding path program 1 times [2024-06-14 12:33:10,937 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:33:10,937 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1820180155] [2024-06-14 12:33:10,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:33:10,938 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:33:10,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:33:11,962 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:33:11,963 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:33:11,963 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1820180155] [2024-06-14 12:33:11,963 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1820180155] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:33:11,963 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:33:11,963 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 12:33:11,963 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [680497808] [2024-06-14 12:33:11,964 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:33:11,964 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 12:33:11,964 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:33:11,964 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 12:33:11,965 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-14 12:33:12,031 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 54 [2024-06-14 12:33:12,032 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 70 places, 76 transitions, 409 flow. Second operand has 7 states, 7 states have (on average 13.571428571428571) internal successors, (95), 7 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:33:12,032 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:33:12,033 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 54 [2024-06-14 12:33:12,033 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:33:13,909 INFO L124 PetriNetUnfolderBase]: 10931/15167 cut-off events. [2024-06-14 12:33:13,909 INFO L125 PetriNetUnfolderBase]: For 38890/38900 co-relation queries the response was YES. [2024-06-14 12:33:13,946 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51438 conditions, 15167 events. 10931/15167 cut-off events. For 38890/38900 co-relation queries the response was YES. Maximal size of possible extension queue 537. Compared 83291 event pairs, 5714 based on Foata normal form. 11/15035 useless extension candidates. Maximal degree in co-relation 51414. Up to 14711 conditions per place. [2024-06-14 12:33:14,006 INFO L140 encePairwiseOnDemand]: 43/54 looper letters, 86 selfloop transitions, 21 changer transitions 0/114 dead transitions. [2024-06-14 12:33:14,006 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 75 places, 114 transitions, 797 flow [2024-06-14 12:33:14,007 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 12:33:14,007 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 12:33:14,007 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 155 transitions. [2024-06-14 12:33:14,008 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4783950617283951 [2024-06-14 12:33:14,008 INFO L175 Difference]: Start difference. First operand has 70 places, 76 transitions, 409 flow. Second operand 6 states and 155 transitions. [2024-06-14 12:33:14,008 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 75 places, 114 transitions, 797 flow [2024-06-14 12:33:14,020 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 74 places, 114 transitions, 775 flow, removed 10 selfloop flow, removed 1 redundant places. [2024-06-14 12:33:14,022 INFO L231 Difference]: Finished difference. Result has 75 places, 84 transitions, 516 flow [2024-06-14 12:33:14,022 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=387, PETRI_DIFFERENCE_MINUEND_PLACES=69, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=76, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=59, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=516, PETRI_PLACES=75, PETRI_TRANSITIONS=84} [2024-06-14 12:33:14,023 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 18 predicate places. [2024-06-14 12:33:14,023 INFO L495 AbstractCegarLoop]: Abstraction has has 75 places, 84 transitions, 516 flow [2024-06-14 12:33:14,023 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 13.571428571428571) internal successors, (95), 7 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:33:14,023 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:33:14,023 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:33:14,024 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-06-14 12:33:14,024 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 12:33:14,024 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:33:14,024 INFO L85 PathProgramCache]: Analyzing trace with hash -23136834, now seen corresponding path program 2 times [2024-06-14 12:33:14,024 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:33:14,024 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1414832738] [2024-06-14 12:33:14,025 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:33:14,025 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:33:14,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:33:14,919 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:33:14,919 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:33:14,919 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1414832738] [2024-06-14 12:33:14,920 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1414832738] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:33:14,920 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:33:14,920 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 12:33:14,920 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [298333709] [2024-06-14 12:33:14,920 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:33:14,920 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 12:33:14,920 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:33:14,920 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 12:33:14,920 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-14 12:33:14,994 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 54 [2024-06-14 12:33:14,994 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 75 places, 84 transitions, 516 flow. Second operand has 7 states, 7 states have (on average 13.571428571428571) internal successors, (95), 7 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:33:14,994 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:33:14,994 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 54 [2024-06-14 12:33:14,994 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:33:16,454 INFO L124 PetriNetUnfolderBase]: 10922/15156 cut-off events. [2024-06-14 12:33:16,454 INFO L125 PetriNetUnfolderBase]: For 52619/52626 co-relation queries the response was YES. [2024-06-14 12:33:16,493 INFO L83 FinitePrefix]: Finished finitePrefix Result has 55121 conditions, 15156 events. 10922/15156 cut-off events. For 52619/52626 co-relation queries the response was YES. Maximal size of possible extension queue 537. Compared 83144 event pairs, 5717 based on Foata normal form. 9/15022 useless extension candidates. Maximal degree in co-relation 55094. Up to 14702 conditions per place. [2024-06-14 12:33:16,555 INFO L140 encePairwiseOnDemand]: 43/54 looper letters, 80 selfloop transitions, 21 changer transitions 0/108 dead transitions. [2024-06-14 12:33:16,555 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 80 places, 108 transitions, 780 flow [2024-06-14 12:33:16,555 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 12:33:16,555 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 12:33:16,556 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 149 transitions. [2024-06-14 12:33:16,556 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45987654320987653 [2024-06-14 12:33:16,556 INFO L175 Difference]: Start difference. First operand has 75 places, 84 transitions, 516 flow. Second operand 6 states and 149 transitions. [2024-06-14 12:33:16,556 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 80 places, 108 transitions, 780 flow [2024-06-14 12:33:16,584 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 78 places, 108 transitions, 722 flow, removed 24 selfloop flow, removed 2 redundant places. [2024-06-14 12:33:16,586 INFO L231 Difference]: Finished difference. Result has 79 places, 84 transitions, 511 flow [2024-06-14 12:33:16,586 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=458, PETRI_DIFFERENCE_MINUEND_PLACES=73, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=84, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=63, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=511, PETRI_PLACES=79, PETRI_TRANSITIONS=84} [2024-06-14 12:33:16,586 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 22 predicate places. [2024-06-14 12:33:16,586 INFO L495 AbstractCegarLoop]: Abstraction has has 79 places, 84 transitions, 511 flow [2024-06-14 12:33:16,587 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 13.571428571428571) internal successors, (95), 7 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:33:16,587 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:33:16,587 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:33:16,587 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-06-14 12:33:16,587 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 12:33:16,587 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:33:16,587 INFO L85 PathProgramCache]: Analyzing trace with hash 1210684030, now seen corresponding path program 1 times [2024-06-14 12:33:16,587 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:33:16,587 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1582289283] [2024-06-14 12:33:16,587 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:33:16,588 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:33:16,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:33:17,498 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:33:17,498 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:33:17,499 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1582289283] [2024-06-14 12:33:17,499 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1582289283] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:33:17,499 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:33:17,499 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 12:33:17,499 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1036022730] [2024-06-14 12:33:17,499 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:33:17,499 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 12:33:17,499 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:33:17,500 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 12:33:17,500 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-14 12:33:17,592 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 54 [2024-06-14 12:33:17,593 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 79 places, 84 transitions, 511 flow. Second operand has 8 states, 8 states have (on average 13.5) internal successors, (108), 8 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:33:17,593 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:33:17,593 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 54 [2024-06-14 12:33:17,593 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:33:19,174 INFO L124 PetriNetUnfolderBase]: 11013/15294 cut-off events. [2024-06-14 12:33:19,174 INFO L125 PetriNetUnfolderBase]: For 59232/59236 co-relation queries the response was YES. [2024-06-14 12:33:19,216 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56128 conditions, 15294 events. 11013/15294 cut-off events. For 59232/59236 co-relation queries the response was YES. Maximal size of possible extension queue 537. Compared 83904 event pairs, 5707 based on Foata normal form. 7/15159 useless extension candidates. Maximal degree in co-relation 56099. Up to 14804 conditions per place. [2024-06-14 12:33:19,273 INFO L140 encePairwiseOnDemand]: 39/54 looper letters, 104 selfloop transitions, 32 changer transitions 0/143 dead transitions. [2024-06-14 12:33:19,274 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 86 places, 143 transitions, 1010 flow [2024-06-14 12:33:19,274 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:33:19,274 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:33:19,275 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 200 transitions. [2024-06-14 12:33:19,275 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46296296296296297 [2024-06-14 12:33:19,275 INFO L175 Difference]: Start difference. First operand has 79 places, 84 transitions, 511 flow. Second operand 8 states and 200 transitions. [2024-06-14 12:33:19,275 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 86 places, 143 transitions, 1010 flow [2024-06-14 12:33:19,309 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 80 places, 143 transitions, 936 flow, removed 3 selfloop flow, removed 6 redundant places. [2024-06-14 12:33:19,311 INFO L231 Difference]: Finished difference. Result has 83 places, 103 transitions, 669 flow [2024-06-14 12:33:19,311 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=453, PETRI_DIFFERENCE_MINUEND_PLACES=73, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=84, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=63, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=669, PETRI_PLACES=83, PETRI_TRANSITIONS=103} [2024-06-14 12:33:19,312 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 26 predicate places. [2024-06-14 12:33:19,312 INFO L495 AbstractCegarLoop]: Abstraction has has 83 places, 103 transitions, 669 flow [2024-06-14 12:33:19,312 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.5) internal successors, (108), 8 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:33:19,312 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:33:19,312 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:33:19,312 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-06-14 12:33:19,312 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 12:33:19,313 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:33:19,313 INFO L85 PathProgramCache]: Analyzing trace with hash 1796522366, now seen corresponding path program 2 times [2024-06-14 12:33:19,313 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:33:19,313 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [347916643] [2024-06-14 12:33:19,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:33:19,313 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:33:19,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:33:20,336 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:33:20,336 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:33:20,337 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [347916643] [2024-06-14 12:33:20,337 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [347916643] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:33:20,337 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:33:20,337 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 12:33:20,337 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1560689636] [2024-06-14 12:33:20,337 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:33:20,337 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 12:33:20,338 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:33:20,338 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 12:33:20,338 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-14 12:33:20,431 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 54 [2024-06-14 12:33:20,432 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 83 places, 103 transitions, 669 flow. Second operand has 8 states, 8 states have (on average 13.5) internal successors, (108), 8 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:33:20,432 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:33:20,432 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 54 [2024-06-14 12:33:20,432 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:33:22,219 INFO L124 PetriNetUnfolderBase]: 11035/15332 cut-off events. [2024-06-14 12:33:22,219 INFO L125 PetriNetUnfolderBase]: For 75256/75264 co-relation queries the response was YES. [2024-06-14 12:33:22,262 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60260 conditions, 15332 events. 11035/15332 cut-off events. For 75256/75264 co-relation queries the response was YES. Maximal size of possible extension queue 537. Compared 84072 event pairs, 5534 based on Foata normal form. 11/15201 useless extension candidates. Maximal degree in co-relation 60229. Up to 14811 conditions per place. [2024-06-14 12:33:22,319 INFO L140 encePairwiseOnDemand]: 42/54 looper letters, 104 selfloop transitions, 34 changer transitions 0/145 dead transitions. [2024-06-14 12:33:22,319 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 89 places, 145 transitions, 1121 flow [2024-06-14 12:33:22,320 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 12:33:22,320 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 12:33:22,320 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 176 transitions. [2024-06-14 12:33:22,321 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4656084656084656 [2024-06-14 12:33:22,321 INFO L175 Difference]: Start difference. First operand has 83 places, 103 transitions, 669 flow. Second operand 7 states and 176 transitions. [2024-06-14 12:33:22,321 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 89 places, 145 transitions, 1121 flow [2024-06-14 12:33:22,376 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 86 places, 145 transitions, 1057 flow, removed 16 selfloop flow, removed 3 redundant places. [2024-06-14 12:33:22,378 INFO L231 Difference]: Finished difference. Result has 87 places, 107 transitions, 746 flow [2024-06-14 12:33:22,378 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=605, PETRI_DIFFERENCE_MINUEND_PLACES=80, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=103, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=69, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=746, PETRI_PLACES=87, PETRI_TRANSITIONS=107} [2024-06-14 12:33:22,379 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 30 predicate places. [2024-06-14 12:33:22,379 INFO L495 AbstractCegarLoop]: Abstraction has has 87 places, 107 transitions, 746 flow [2024-06-14 12:33:22,379 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.5) internal successors, (108), 8 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:33:22,379 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:33:22,379 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:33:22,379 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-06-14 12:33:22,379 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 12:33:22,379 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:33:22,379 INFO L85 PathProgramCache]: Analyzing trace with hash 28187790, now seen corresponding path program 1 times [2024-06-14 12:33:22,380 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:33:22,380 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1347033648] [2024-06-14 12:33:22,380 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:33:22,380 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:33:22,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:33:23,415 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:33:23,415 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:33:23,416 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1347033648] [2024-06-14 12:33:23,416 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1347033648] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:33:23,416 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:33:23,416 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 12:33:23,416 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [651895708] [2024-06-14 12:33:23,416 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:33:23,416 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 12:33:23,416 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:33:23,417 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 12:33:23,417 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-14 12:33:23,520 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 54 [2024-06-14 12:33:23,521 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 87 places, 107 transitions, 746 flow. Second operand has 8 states, 8 states have (on average 13.5) internal successors, (108), 8 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:33:23,521 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:33:23,521 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 54 [2024-06-14 12:33:23,521 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:33:25,296 INFO L124 PetriNetUnfolderBase]: 11124/15472 cut-off events. [2024-06-14 12:33:25,296 INFO L125 PetriNetUnfolderBase]: For 95291/95302 co-relation queries the response was YES. [2024-06-14 12:33:25,349 INFO L83 FinitePrefix]: Finished finitePrefix Result has 64526 conditions, 15472 events. 11124/15472 cut-off events. For 95291/95302 co-relation queries the response was YES. Maximal size of possible extension queue 537. Compared 85071 event pairs, 5222 based on Foata normal form. 15/15344 useless extension candidates. Maximal degree in co-relation 64494. Up to 14738 conditions per place. [2024-06-14 12:33:25,411 INFO L140 encePairwiseOnDemand]: 41/54 looper letters, 117 selfloop transitions, 43 changer transitions 0/167 dead transitions. [2024-06-14 12:33:25,412 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 93 places, 167 transitions, 1488 flow [2024-06-14 12:33:25,412 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 12:33:25,412 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 12:33:25,413 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 189 transitions. [2024-06-14 12:33:25,413 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5 [2024-06-14 12:33:25,413 INFO L175 Difference]: Start difference. First operand has 87 places, 107 transitions, 746 flow. Second operand 7 states and 189 transitions. [2024-06-14 12:33:25,413 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 93 places, 167 transitions, 1488 flow [2024-06-14 12:33:25,474 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 88 places, 167 transitions, 1357 flow, removed 37 selfloop flow, removed 5 redundant places. [2024-06-14 12:33:25,476 INFO L231 Difference]: Finished difference. Result has 91 places, 122 transitions, 906 flow [2024-06-14 12:33:25,476 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=643, PETRI_DIFFERENCE_MINUEND_PLACES=82, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=107, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=72, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=906, PETRI_PLACES=91, PETRI_TRANSITIONS=122} [2024-06-14 12:33:25,477 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 34 predicate places. [2024-06-14 12:33:25,477 INFO L495 AbstractCegarLoop]: Abstraction has has 91 places, 122 transitions, 906 flow [2024-06-14 12:33:25,477 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.5) internal successors, (108), 8 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:33:25,477 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:33:25,478 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:33:25,478 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-06-14 12:33:25,478 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 12:33:25,478 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:33:25,478 INFO L85 PathProgramCache]: Analyzing trace with hash 1796642336, now seen corresponding path program 3 times [2024-06-14 12:33:25,478 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:33:25,478 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1121818594] [2024-06-14 12:33:25,478 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:33:25,478 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:33:25,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:33:26,425 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:33:26,425 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:33:26,425 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1121818594] [2024-06-14 12:33:26,425 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1121818594] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:33:26,425 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:33:26,425 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 12:33:26,425 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1899321793] [2024-06-14 12:33:26,425 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:33:26,425 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 12:33:26,426 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:33:26,426 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 12:33:26,426 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-14 12:33:26,505 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 54 [2024-06-14 12:33:26,505 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 91 places, 122 transitions, 906 flow. Second operand has 8 states, 8 states have (on average 13.5) internal successors, (108), 8 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:33:26,505 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:33:26,506 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 54 [2024-06-14 12:33:26,506 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:33:28,270 INFO L124 PetriNetUnfolderBase]: 11146/15509 cut-off events. [2024-06-14 12:33:28,270 INFO L125 PetriNetUnfolderBase]: For 101629/101641 co-relation queries the response was YES. [2024-06-14 12:33:28,327 INFO L83 FinitePrefix]: Finished finitePrefix Result has 67037 conditions, 15509 events. 11146/15509 cut-off events. For 101629/101641 co-relation queries the response was YES. Maximal size of possible extension queue 538. Compared 85229 event pairs, 5328 based on Foata normal form. 11/15380 useless extension candidates. Maximal degree in co-relation 67002. Up to 14873 conditions per place. [2024-06-14 12:33:28,393 INFO L140 encePairwiseOnDemand]: 42/54 looper letters, 109 selfloop transitions, 50 changer transitions 0/166 dead transitions. [2024-06-14 12:33:28,393 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 97 places, 166 transitions, 1496 flow [2024-06-14 12:33:28,394 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 12:33:28,394 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 12:33:28,395 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 180 transitions. [2024-06-14 12:33:28,395 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47619047619047616 [2024-06-14 12:33:28,395 INFO L175 Difference]: Start difference. First operand has 91 places, 122 transitions, 906 flow. Second operand 7 states and 180 transitions. [2024-06-14 12:33:28,395 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 97 places, 166 transitions, 1496 flow [2024-06-14 12:33:28,468 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 95 places, 166 transitions, 1428 flow, removed 25 selfloop flow, removed 2 redundant places. [2024-06-14 12:33:28,470 INFO L231 Difference]: Finished difference. Result has 96 places, 130 transitions, 1065 flow [2024-06-14 12:33:28,471 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=838, PETRI_DIFFERENCE_MINUEND_PLACES=89, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=122, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=76, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1065, PETRI_PLACES=96, PETRI_TRANSITIONS=130} [2024-06-14 12:33:28,471 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 39 predicate places. [2024-06-14 12:33:28,471 INFO L495 AbstractCegarLoop]: Abstraction has has 96 places, 130 transitions, 1065 flow [2024-06-14 12:33:28,471 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.5) internal successors, (108), 8 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:33:28,472 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:33:28,472 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:33:28,472 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-06-14 12:33:28,472 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 12:33:28,472 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:33:28,472 INFO L85 PathProgramCache]: Analyzing trace with hash -717240130, now seen corresponding path program 4 times [2024-06-14 12:33:28,472 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:33:28,473 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1858004135] [2024-06-14 12:33:28,473 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:33:28,473 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:33:28,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:33:29,418 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:33:29,418 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:33:29,418 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1858004135] [2024-06-14 12:33:29,418 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1858004135] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:33:29,418 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:33:29,418 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 12:33:29,418 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1590879693] [2024-06-14 12:33:29,419 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:33:29,419 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 12:33:29,419 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:33:29,419 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 12:33:29,419 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-14 12:33:29,523 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 54 [2024-06-14 12:33:29,523 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 96 places, 130 transitions, 1065 flow. Second operand has 8 states, 8 states have (on average 13.5) internal successors, (108), 8 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:33:29,523 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:33:29,523 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 54 [2024-06-14 12:33:29,523 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:33:31,340 INFO L124 PetriNetUnfolderBase]: 11137/15488 cut-off events. [2024-06-14 12:33:31,340 INFO L125 PetriNetUnfolderBase]: For 124408/124412 co-relation queries the response was YES. [2024-06-14 12:33:31,403 INFO L83 FinitePrefix]: Finished finitePrefix Result has 70677 conditions, 15488 events. 11137/15488 cut-off events. For 124408/124412 co-relation queries the response was YES. Maximal size of possible extension queue 538. Compared 84868 event pairs, 5335 based on Foata normal form. 3/15346 useless extension candidates. Maximal degree in co-relation 70640. Up to 14864 conditions per place. [2024-06-14 12:33:31,471 INFO L140 encePairwiseOnDemand]: 42/54 looper letters, 104 selfloop transitions, 50 changer transitions 0/161 dead transitions. [2024-06-14 12:33:31,471 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 102 places, 161 transitions, 1471 flow [2024-06-14 12:33:31,471 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 12:33:31,471 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 12:33:31,472 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 174 transitions. [2024-06-14 12:33:31,472 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4603174603174603 [2024-06-14 12:33:31,472 INFO L175 Difference]: Start difference. First operand has 96 places, 130 transitions, 1065 flow. Second operand 7 states and 174 transitions. [2024-06-14 12:33:31,472 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 102 places, 161 transitions, 1471 flow [2024-06-14 12:33:31,573 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 99 places, 161 transitions, 1366 flow, removed 39 selfloop flow, removed 3 redundant places. [2024-06-14 12:33:31,576 INFO L231 Difference]: Finished difference. Result has 100 places, 130 transitions, 1071 flow [2024-06-14 12:33:31,576 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=960, PETRI_DIFFERENCE_MINUEND_PLACES=93, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=130, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=50, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=80, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1071, PETRI_PLACES=100, PETRI_TRANSITIONS=130} [2024-06-14 12:33:31,577 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 43 predicate places. [2024-06-14 12:33:31,577 INFO L495 AbstractCegarLoop]: Abstraction has has 100 places, 130 transitions, 1071 flow [2024-06-14 12:33:31,577 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.5) internal successors, (108), 8 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:33:31,577 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:33:31,577 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:33:31,577 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-06-14 12:33:31,577 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 12:33:31,578 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:33:31,578 INFO L85 PathProgramCache]: Analyzing trace with hash 1974011192, now seen corresponding path program 2 times [2024-06-14 12:33:31,578 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:33:31,578 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1210089769] [2024-06-14 12:33:31,578 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:33:31,578 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:33:31,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:33:32,509 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:33:32,509 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:33:32,509 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1210089769] [2024-06-14 12:33:32,509 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1210089769] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:33:32,509 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:33:32,509 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 12:33:32,509 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [787340289] [2024-06-14 12:33:32,509 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:33:32,509 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 12:33:32,510 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:33:32,510 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 12:33:32,510 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-14 12:33:32,658 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 54 [2024-06-14 12:33:32,659 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 100 places, 130 transitions, 1071 flow. Second operand has 8 states, 8 states have (on average 13.5) internal successors, (108), 8 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:33:32,659 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:33:32,659 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 54 [2024-06-14 12:33:32,659 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:33:34,462 INFO L124 PetriNetUnfolderBase]: 11203/15593 cut-off events. [2024-06-14 12:33:34,462 INFO L125 PetriNetUnfolderBase]: For 137398/137418 co-relation queries the response was YES. [2024-06-14 12:33:34,525 INFO L83 FinitePrefix]: Finished finitePrefix Result has 72418 conditions, 15593 events. 11203/15593 cut-off events. For 137398/137418 co-relation queries the response was YES. Maximal size of possible extension queue 537. Compared 85650 event pairs, 5240 based on Foata normal form. 21/15468 useless extension candidates. Maximal degree in co-relation 72379. Up to 14822 conditions per place. [2024-06-14 12:33:34,593 INFO L140 encePairwiseOnDemand]: 41/54 looper letters, 119 selfloop transitions, 59 changer transitions 0/185 dead transitions. [2024-06-14 12:33:34,593 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 106 places, 185 transitions, 1862 flow [2024-06-14 12:33:34,593 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 12:33:34,593 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 12:33:34,594 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 185 transitions. [2024-06-14 12:33:34,594 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4894179894179894 [2024-06-14 12:33:34,594 INFO L175 Difference]: Start difference. First operand has 100 places, 130 transitions, 1071 flow. Second operand 7 states and 185 transitions. [2024-06-14 12:33:34,594 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 106 places, 185 transitions, 1862 flow [2024-06-14 12:33:34,723 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 100 places, 185 transitions, 1726 flow, removed 7 selfloop flow, removed 6 redundant places. [2024-06-14 12:33:34,725 INFO L231 Difference]: Finished difference. Result has 102 places, 144 transitions, 1251 flow [2024-06-14 12:33:34,726 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=935, PETRI_DIFFERENCE_MINUEND_PLACES=94, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=130, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=83, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1251, PETRI_PLACES=102, PETRI_TRANSITIONS=144} [2024-06-14 12:33:34,726 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 45 predicate places. [2024-06-14 12:33:34,726 INFO L495 AbstractCegarLoop]: Abstraction has has 102 places, 144 transitions, 1251 flow [2024-06-14 12:33:34,726 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.5) internal successors, (108), 8 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:33:34,727 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:33:34,727 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:33:34,727 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-06-14 12:33:34,727 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 12:33:34,727 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:33:34,727 INFO L85 PathProgramCache]: Analyzing trace with hash 1973774042, now seen corresponding path program 3 times [2024-06-14 12:33:34,727 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:33:34,727 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1968844773] [2024-06-14 12:33:34,727 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:33:34,727 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:33:34,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:33:35,637 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:33:35,637 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:33:35,637 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1968844773] [2024-06-14 12:33:35,637 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1968844773] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:33:35,637 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:33:35,637 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 12:33:35,637 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2096402965] [2024-06-14 12:33:35,637 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:33:35,638 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 12:33:35,638 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:33:35,638 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 12:33:35,638 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-14 12:33:35,726 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 54 [2024-06-14 12:33:35,726 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 102 places, 144 transitions, 1251 flow. Second operand has 8 states, 8 states have (on average 13.5) internal successors, (108), 8 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:33:35,726 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:33:35,726 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 54 [2024-06-14 12:33:35,727 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:33:37,598 INFO L124 PetriNetUnfolderBase]: 11192/15579 cut-off events. [2024-06-14 12:33:37,598 INFO L125 PetriNetUnfolderBase]: For 159316/159336 co-relation queries the response was YES. [2024-06-14 12:33:37,657 INFO L83 FinitePrefix]: Finished finitePrefix Result has 75136 conditions, 15579 events. 11192/15579 cut-off events. For 159316/159336 co-relation queries the response was YES. Maximal size of possible extension queue 537. Compared 85588 event pairs, 5240 based on Foata normal form. 21/15454 useless extension candidates. Maximal degree in co-relation 75095. Up to 14815 conditions per place. [2024-06-14 12:33:37,723 INFO L140 encePairwiseOnDemand]: 41/54 looper letters, 123 selfloop transitions, 54 changer transitions 0/184 dead transitions. [2024-06-14 12:33:37,724 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 108 places, 184 transitions, 1877 flow [2024-06-14 12:33:37,724 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 12:33:37,724 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 12:33:37,724 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 184 transitions. [2024-06-14 12:33:37,724 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48677248677248675 [2024-06-14 12:33:37,725 INFO L175 Difference]: Start difference. First operand has 102 places, 144 transitions, 1251 flow. Second operand 7 states and 184 transitions. [2024-06-14 12:33:37,725 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 108 places, 184 transitions, 1877 flow [2024-06-14 12:33:37,871 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 107 places, 184 transitions, 1811 flow, removed 32 selfloop flow, removed 1 redundant places. [2024-06-14 12:33:37,873 INFO L231 Difference]: Finished difference. Result has 108 places, 144 transitions, 1306 flow [2024-06-14 12:33:37,873 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=1185, PETRI_DIFFERENCE_MINUEND_PLACES=101, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=144, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=54, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=90, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1306, PETRI_PLACES=108, PETRI_TRANSITIONS=144} [2024-06-14 12:33:37,873 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 51 predicate places. [2024-06-14 12:33:37,874 INFO L495 AbstractCegarLoop]: Abstraction has has 108 places, 144 transitions, 1306 flow [2024-06-14 12:33:37,874 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.5) internal successors, (108), 8 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:33:37,874 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:33:37,874 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:33:37,874 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-06-14 12:33:37,874 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 12:33:37,874 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:33:37,875 INFO L85 PathProgramCache]: Analyzing trace with hash 1974020120, now seen corresponding path program 1 times [2024-06-14 12:33:37,875 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:33:37,875 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1252025115] [2024-06-14 12:33:37,875 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:33:37,875 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:33:37,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:33:38,804 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:33:38,805 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:33:38,805 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1252025115] [2024-06-14 12:33:38,805 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1252025115] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:33:38,805 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:33:38,805 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 12:33:38,805 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1531909883] [2024-06-14 12:33:38,805 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:33:38,805 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 12:33:38,805 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:33:38,805 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 12:33:38,806 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-14 12:33:38,941 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 54 [2024-06-14 12:33:38,941 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 108 places, 144 transitions, 1306 flow. Second operand has 8 states, 8 states have (on average 14.5) internal successors, (116), 8 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:33:38,941 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:33:38,941 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 54 [2024-06-14 12:33:38,941 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:33:40,599 INFO L124 PetriNetUnfolderBase]: 9817/14079 cut-off events. [2024-06-14 12:33:40,599 INFO L125 PetriNetUnfolderBase]: For 143990/143995 co-relation queries the response was YES. [2024-06-14 12:33:40,657 INFO L83 FinitePrefix]: Finished finitePrefix Result has 67210 conditions, 14079 events. 9817/14079 cut-off events. For 143990/143995 co-relation queries the response was YES. Maximal size of possible extension queue 485. Compared 80633 event pairs, 4372 based on Foata normal form. 12/13954 useless extension candidates. Maximal degree in co-relation 67166. Up to 13184 conditions per place. [2024-06-14 12:33:40,719 INFO L140 encePairwiseOnDemand]: 42/54 looper letters, 150 selfloop transitions, 26 changer transitions 0/184 dead transitions. [2024-06-14 12:33:40,719 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 114 places, 184 transitions, 1926 flow [2024-06-14 12:33:40,720 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 12:33:40,720 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 12:33:40,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 185 transitions. [2024-06-14 12:33:40,720 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4894179894179894 [2024-06-14 12:33:40,720 INFO L175 Difference]: Start difference. First operand has 108 places, 144 transitions, 1306 flow. Second operand 7 states and 185 transitions. [2024-06-14 12:33:40,720 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 114 places, 184 transitions, 1926 flow [2024-06-14 12:33:40,836 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 107 places, 184 transitions, 1789 flow, removed 4 selfloop flow, removed 7 redundant places. [2024-06-14 12:33:40,838 INFO L231 Difference]: Finished difference. Result has 108 places, 148 transitions, 1296 flow [2024-06-14 12:33:40,838 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=1169, PETRI_DIFFERENCE_MINUEND_PLACES=101, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=144, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=118, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1296, PETRI_PLACES=108, PETRI_TRANSITIONS=148} [2024-06-14 12:33:40,839 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 51 predicate places. [2024-06-14 12:33:40,839 INFO L495 AbstractCegarLoop]: Abstraction has has 108 places, 148 transitions, 1296 flow [2024-06-14 12:33:40,839 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 14.5) internal successors, (116), 8 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:33:40,839 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:33:40,839 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:33:40,839 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-06-14 12:33:40,839 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 12:33:40,840 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:33:40,840 INFO L85 PathProgramCache]: Analyzing trace with hash 648889273, now seen corresponding path program 1 times [2024-06-14 12:33:40,840 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:33:40,840 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1025356729] [2024-06-14 12:33:40,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:33:40,840 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:33:40,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:33:41,742 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:33:41,743 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:33:41,743 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1025356729] [2024-06-14 12:33:41,744 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1025356729] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:33:41,745 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:33:41,745 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 12:33:41,745 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2124989961] [2024-06-14 12:33:41,745 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:33:41,745 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 12:33:41,745 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:33:41,745 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 12:33:41,745 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-14 12:33:41,827 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 54 [2024-06-14 12:33:41,828 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 108 places, 148 transitions, 1296 flow. Second operand has 7 states, 7 states have (on average 15.857142857142858) internal successors, (111), 7 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:33:41,828 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:33:41,828 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 54 [2024-06-14 12:33:41,828 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:33:43,379 INFO L124 PetriNetUnfolderBase]: 9247/13491 cut-off events. [2024-06-14 12:33:43,380 INFO L125 PetriNetUnfolderBase]: For 160201/160218 co-relation queries the response was YES. [2024-06-14 12:33:43,432 INFO L83 FinitePrefix]: Finished finitePrefix Result has 67335 conditions, 13491 events. 9247/13491 cut-off events. For 160201/160218 co-relation queries the response was YES. Maximal size of possible extension queue 485. Compared 79956 event pairs, 4523 based on Foata normal form. 17/13366 useless extension candidates. Maximal degree in co-relation 67292. Up to 12528 conditions per place. [2024-06-14 12:33:43,491 INFO L140 encePairwiseOnDemand]: 45/54 looper letters, 133 selfloop transitions, 10 changer transitions 0/162 dead transitions. [2024-06-14 12:33:43,491 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 112 places, 162 transitions, 1626 flow [2024-06-14 12:33:43,492 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-14 12:33:43,492 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-14 12:33:43,492 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 128 transitions. [2024-06-14 12:33:43,492 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4740740740740741 [2024-06-14 12:33:43,492 INFO L175 Difference]: Start difference. First operand has 108 places, 148 transitions, 1296 flow. Second operand 5 states and 128 transitions. [2024-06-14 12:33:43,492 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 112 places, 162 transitions, 1626 flow [2024-06-14 12:33:43,625 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 107 places, 162 transitions, 1519 flow, removed 30 selfloop flow, removed 5 redundant places. [2024-06-14 12:33:43,627 INFO L231 Difference]: Finished difference. Result has 108 places, 148 transitions, 1218 flow [2024-06-14 12:33:43,627 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=1189, PETRI_DIFFERENCE_MINUEND_PLACES=103, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=148, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=138, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1218, PETRI_PLACES=108, PETRI_TRANSITIONS=148} [2024-06-14 12:33:43,628 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 51 predicate places. [2024-06-14 12:33:43,628 INFO L495 AbstractCegarLoop]: Abstraction has has 108 places, 148 transitions, 1218 flow [2024-06-14 12:33:43,628 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.857142857142858) internal successors, (111), 7 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:33:43,628 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:33:43,628 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:33:43,628 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-06-14 12:33:43,628 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 12:33:43,629 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:33:43,629 INFO L85 PathProgramCache]: Analyzing trace with hash -138804672, now seen corresponding path program 1 times [2024-06-14 12:33:43,629 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:33:43,629 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1849746857] [2024-06-14 12:33:43,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:33:43,629 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:33:43,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:33:44,655 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:33:44,656 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:33:44,656 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1849746857] [2024-06-14 12:33:44,656 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1849746857] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:33:44,656 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:33:44,656 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:33:44,656 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1890751837] [2024-06-14 12:33:44,656 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:33:44,657 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:33:44,657 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:33:44,657 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:33:44,657 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:33:44,794 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 54 [2024-06-14 12:33:44,794 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 108 places, 148 transitions, 1218 flow. Second operand has 9 states, 9 states have (on average 13.444444444444445) internal successors, (121), 9 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:33:44,794 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:33:44,794 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 54 [2024-06-14 12:33:44,794 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:33:46,632 INFO L124 PetriNetUnfolderBase]: 11294/15577 cut-off events. [2024-06-14 12:33:46,632 INFO L125 PetriNetUnfolderBase]: For 212013/212024 co-relation queries the response was YES. [2024-06-14 12:33:46,691 INFO L83 FinitePrefix]: Finished finitePrefix Result has 79534 conditions, 15577 events. 11294/15577 cut-off events. For 212013/212024 co-relation queries the response was YES. Maximal size of possible extension queue 524. Compared 85200 event pairs, 5134 based on Foata normal form. 15/15514 useless extension candidates. Maximal degree in co-relation 79490. Up to 15032 conditions per place. [2024-06-14 12:33:46,761 INFO L140 encePairwiseOnDemand]: 40/54 looper letters, 158 selfloop transitions, 48 changer transitions 0/213 dead transitions. [2024-06-14 12:33:46,761 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 115 places, 213 transitions, 2146 flow [2024-06-14 12:33:46,762 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:33:46,762 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:33:46,762 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 211 transitions. [2024-06-14 12:33:46,763 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48842592592592593 [2024-06-14 12:33:46,763 INFO L175 Difference]: Start difference. First operand has 108 places, 148 transitions, 1218 flow. Second operand 8 states and 211 transitions. [2024-06-14 12:33:46,763 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 115 places, 213 transitions, 2146 flow [2024-06-14 12:33:46,922 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 111 places, 213 transitions, 2117 flow, removed 3 selfloop flow, removed 4 redundant places. [2024-06-14 12:33:46,925 INFO L231 Difference]: Finished difference. Result has 114 places, 162 transitions, 1519 flow [2024-06-14 12:33:46,925 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=1189, PETRI_DIFFERENCE_MINUEND_PLACES=104, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=148, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=107, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1519, PETRI_PLACES=114, PETRI_TRANSITIONS=162} [2024-06-14 12:33:46,926 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 57 predicate places. [2024-06-14 12:33:46,926 INFO L495 AbstractCegarLoop]: Abstraction has has 114 places, 162 transitions, 1519 flow [2024-06-14 12:33:46,926 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 13.444444444444445) internal successors, (121), 9 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:33:46,926 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:33:46,926 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:33:46,926 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-06-14 12:33:46,927 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 12:33:46,927 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:33:46,927 INFO L85 PathProgramCache]: Analyzing trace with hash -138654942, now seen corresponding path program 2 times [2024-06-14 12:33:46,927 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:33:46,927 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [169298241] [2024-06-14 12:33:46,927 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:33:46,927 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:33:46,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:33:48,069 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:33:48,069 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:33:48,069 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [169298241] [2024-06-14 12:33:48,069 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [169298241] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:33:48,069 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:33:48,069 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:33:48,069 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1605723515] [2024-06-14 12:33:48,069 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:33:48,069 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:33:48,069 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:33:48,070 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:33:48,070 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:33:48,168 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 54 [2024-06-14 12:33:48,168 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 114 places, 162 transitions, 1519 flow. Second operand has 9 states, 9 states have (on average 13.444444444444445) internal successors, (121), 9 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:33:48,168 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:33:48,168 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 54 [2024-06-14 12:33:48,168 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:33:50,245 INFO L124 PetriNetUnfolderBase]: 11437/15795 cut-off events. [2024-06-14 12:33:50,245 INFO L125 PetriNetUnfolderBase]: For 255855/255860 co-relation queries the response was YES. [2024-06-14 12:33:50,311 INFO L83 FinitePrefix]: Finished finitePrefix Result has 86981 conditions, 15795 events. 11437/15795 cut-off events. For 255855/255860 co-relation queries the response was YES. Maximal size of possible extension queue 526. Compared 86522 event pairs, 5068 based on Foata normal form. 7/15713 useless extension candidates. Maximal degree in co-relation 86935. Up to 14745 conditions per place. [2024-06-14 12:33:50,388 INFO L140 encePairwiseOnDemand]: 40/54 looper letters, 128 selfloop transitions, 98 changer transitions 0/233 dead transitions. [2024-06-14 12:33:50,388 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 121 places, 233 transitions, 2747 flow [2024-06-14 12:33:50,403 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:33:50,403 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:33:50,404 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 219 transitions. [2024-06-14 12:33:50,404 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5069444444444444 [2024-06-14 12:33:50,404 INFO L175 Difference]: Start difference. First operand has 114 places, 162 transitions, 1519 flow. Second operand 8 states and 219 transitions. [2024-06-14 12:33:50,404 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 121 places, 233 transitions, 2747 flow [2024-06-14 12:33:50,597 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 117 places, 233 transitions, 2602 flow, removed 45 selfloop flow, removed 4 redundant places. [2024-06-14 12:33:50,600 INFO L231 Difference]: Finished difference. Result has 120 places, 181 transitions, 1928 flow [2024-06-14 12:33:50,600 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=1374, PETRI_DIFFERENCE_MINUEND_PLACES=110, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=162, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=83, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=77, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1928, PETRI_PLACES=120, PETRI_TRANSITIONS=181} [2024-06-14 12:33:50,601 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 63 predicate places. [2024-06-14 12:33:50,601 INFO L495 AbstractCegarLoop]: Abstraction has has 120 places, 181 transitions, 1928 flow [2024-06-14 12:33:50,601 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 13.444444444444445) internal successors, (121), 9 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:33:50,601 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:33:50,601 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:33:50,601 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2024-06-14 12:33:50,601 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 12:33:50,601 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:33:50,602 INFO L85 PathProgramCache]: Analyzing trace with hash 873817634, now seen corresponding path program 3 times [2024-06-14 12:33:50,602 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:33:50,602 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2043458771] [2024-06-14 12:33:50,602 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:33:50,602 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:33:50,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:33:51,639 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:33:51,639 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:33:51,640 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2043458771] [2024-06-14 12:33:51,640 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2043458771] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:33:51,640 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:33:51,640 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:33:51,640 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1609331781] [2024-06-14 12:33:51,640 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:33:51,640 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:33:51,640 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:33:51,640 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:33:51,641 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:33:51,764 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 54 [2024-06-14 12:33:51,764 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 120 places, 181 transitions, 1928 flow. Second operand has 9 states, 9 states have (on average 13.444444444444445) internal successors, (121), 9 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:33:51,765 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:33:51,765 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 54 [2024-06-14 12:33:51,765 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:33:53,863 INFO L124 PetriNetUnfolderBase]: 11426/15783 cut-off events. [2024-06-14 12:33:53,863 INFO L125 PetriNetUnfolderBase]: For 303108/303113 co-relation queries the response was YES. [2024-06-14 12:33:53,934 INFO L83 FinitePrefix]: Finished finitePrefix Result has 93001 conditions, 15783 events. 11426/15783 cut-off events. For 303108/303113 co-relation queries the response was YES. Maximal size of possible extension queue 526. Compared 86444 event pairs, 5068 based on Foata normal form. 7/15700 useless extension candidates. Maximal degree in co-relation 92952. Up to 14738 conditions per place. [2024-06-14 12:33:54,012 INFO L140 encePairwiseOnDemand]: 40/54 looper letters, 133 selfloop transitions, 92 changer transitions 0/232 dead transitions. [2024-06-14 12:33:54,012 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 127 places, 232 transitions, 2872 flow [2024-06-14 12:33:54,012 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:33:54,012 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:33:54,013 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 218 transitions. [2024-06-14 12:33:54,013 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5046296296296297 [2024-06-14 12:33:54,013 INFO L175 Difference]: Start difference. First operand has 120 places, 181 transitions, 1928 flow. Second operand 8 states and 218 transitions. [2024-06-14 12:33:54,013 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 127 places, 232 transitions, 2872 flow [2024-06-14 12:33:54,266 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 125 places, 232 transitions, 2714 flow, removed 70 selfloop flow, removed 2 redundant places. [2024-06-14 12:33:54,454 INFO L231 Difference]: Finished difference. Result has 126 places, 181 transitions, 1969 flow [2024-06-14 12:33:54,454 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=1772, PETRI_DIFFERENCE_MINUEND_PLACES=118, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=181, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=92, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=89, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1969, PETRI_PLACES=126, PETRI_TRANSITIONS=181} [2024-06-14 12:33:54,455 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 69 predicate places. [2024-06-14 12:33:54,455 INFO L495 AbstractCegarLoop]: Abstraction has has 126 places, 181 transitions, 1969 flow [2024-06-14 12:33:54,455 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 13.444444444444445) internal successors, (121), 9 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:33:54,455 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:33:54,455 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:33:54,455 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2024-06-14 12:33:54,455 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 12:33:54,456 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:33:54,456 INFO L85 PathProgramCache]: Analyzing trace with hash -752248410, now seen corresponding path program 4 times [2024-06-14 12:33:54,456 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:33:54,456 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1347357248] [2024-06-14 12:33:54,456 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:33:54,456 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:33:54,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:33:55,462 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:33:55,462 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:33:55,462 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1347357248] [2024-06-14 12:33:55,463 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1347357248] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:33:55,463 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:33:55,463 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:33:55,463 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1537137354] [2024-06-14 12:33:55,463 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:33:55,463 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:33:55,463 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:33:55,464 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:33:55,464 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:33:55,562 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 54 [2024-06-14 12:33:55,562 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 126 places, 181 transitions, 1969 flow. Second operand has 9 states, 9 states have (on average 13.444444444444445) internal successors, (121), 9 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:33:55,562 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:33:55,562 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 54 [2024-06-14 12:33:55,562 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:33:57,840 INFO L124 PetriNetUnfolderBase]: 11492/15895 cut-off events. [2024-06-14 12:33:57,840 INFO L125 PetriNetUnfolderBase]: For 311089/311096 co-relation queries the response was YES. [2024-06-14 12:33:57,896 INFO L83 FinitePrefix]: Finished finitePrefix Result has 92120 conditions, 15895 events. 11492/15895 cut-off events. For 311089/311096 co-relation queries the response was YES. Maximal size of possible extension queue 526. Compared 87331 event pairs, 5062 based on Foata normal form. 7/15809 useless extension candidates. Maximal degree in co-relation 92069. Up to 14804 conditions per place. [2024-06-14 12:33:57,967 INFO L140 encePairwiseOnDemand]: 40/54 looper letters, 115 selfloop transitions, 115 changer transitions 0/237 dead transitions. [2024-06-14 12:33:57,967 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 133 places, 237 transitions, 3011 flow [2024-06-14 12:33:57,967 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:33:57,968 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:33:57,968 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 212 transitions. [2024-06-14 12:33:57,968 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49074074074074076 [2024-06-14 12:33:57,968 INFO L175 Difference]: Start difference. First operand has 126 places, 181 transitions, 1969 flow. Second operand 8 states and 212 transitions. [2024-06-14 12:33:57,968 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 133 places, 237 transitions, 3011 flow [2024-06-14 12:33:58,184 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 127 places, 237 transitions, 2803 flow, removed 21 selfloop flow, removed 6 redundant places. [2024-06-14 12:33:58,186 INFO L231 Difference]: Finished difference. Result has 129 places, 192 transitions, 2268 flow [2024-06-14 12:33:58,187 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=1769, PETRI_DIFFERENCE_MINUEND_PLACES=120, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=181, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=105, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=75, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2268, PETRI_PLACES=129, PETRI_TRANSITIONS=192} [2024-06-14 12:33:58,187 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 72 predicate places. [2024-06-14 12:33:58,187 INFO L495 AbstractCegarLoop]: Abstraction has has 129 places, 192 transitions, 2268 flow [2024-06-14 12:33:58,187 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 13.444444444444445) internal successors, (121), 9 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:33:58,187 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:33:58,187 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:33:58,187 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2024-06-14 12:33:58,188 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 12:33:58,188 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:33:58,188 INFO L85 PathProgramCache]: Analyzing trace with hash 1820591406, now seen corresponding path program 5 times [2024-06-14 12:33:58,188 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:33:58,188 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [893344234] [2024-06-14 12:33:58,188 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:33:58,188 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:33:58,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:33:59,186 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:33:59,186 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:33:59,187 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [893344234] [2024-06-14 12:33:59,187 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [893344234] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:33:59,187 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:33:59,187 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:33:59,187 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1532961038] [2024-06-14 12:33:59,187 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:33:59,187 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:33:59,187 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:33:59,188 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:33:59,188 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:33:59,289 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 54 [2024-06-14 12:33:59,290 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 129 places, 192 transitions, 2268 flow. Second operand has 9 states, 9 states have (on average 13.444444444444445) internal successors, (121), 9 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:33:59,290 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:33:59,290 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 54 [2024-06-14 12:33:59,290 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:34:01,530 INFO L124 PetriNetUnfolderBase]: 11535/15966 cut-off events. [2024-06-14 12:34:01,531 INFO L125 PetriNetUnfolderBase]: For 346411/346418 co-relation queries the response was YES. [2024-06-14 12:34:01,594 INFO L83 FinitePrefix]: Finished finitePrefix Result has 95297 conditions, 15966 events. 11535/15966 cut-off events. For 346411/346418 co-relation queries the response was YES. Maximal size of possible extension queue 526. Compared 87803 event pairs, 5062 based on Foata normal form. 7/15881 useless extension candidates. Maximal degree in co-relation 95245. Up to 14846 conditions per place. [2024-06-14 12:34:01,674 INFO L140 encePairwiseOnDemand]: 40/54 looper letters, 131 selfloop transitions, 106 changer transitions 0/244 dead transitions. [2024-06-14 12:34:01,674 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 136 places, 244 transitions, 3319 flow [2024-06-14 12:34:01,675 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:34:01,675 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:34:01,675 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 215 transitions. [2024-06-14 12:34:01,675 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4976851851851852 [2024-06-14 12:34:01,675 INFO L175 Difference]: Start difference. First operand has 129 places, 192 transitions, 2268 flow. Second operand 8 states and 215 transitions. [2024-06-14 12:34:01,675 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 136 places, 244 transitions, 3319 flow [2024-06-14 12:34:01,974 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 133 places, 244 transitions, 3191 flow, removed 47 selfloop flow, removed 3 redundant places. [2024-06-14 12:34:01,978 INFO L231 Difference]: Finished difference. Result has 134 places, 197 transitions, 2463 flow [2024-06-14 12:34:01,978 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=2150, PETRI_DIFFERENCE_MINUEND_PLACES=126, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=192, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=101, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=91, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2463, PETRI_PLACES=134, PETRI_TRANSITIONS=197} [2024-06-14 12:34:01,978 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 77 predicate places. [2024-06-14 12:34:01,978 INFO L495 AbstractCegarLoop]: Abstraction has has 134 places, 197 transitions, 2463 flow [2024-06-14 12:34:01,979 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 13.444444444444445) internal successors, (121), 9 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:34:01,979 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:34:01,979 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:34:01,979 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2024-06-14 12:34:01,979 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 12:34:01,979 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:34:01,979 INFO L85 PathProgramCache]: Analyzing trace with hash 1820585826, now seen corresponding path program 6 times [2024-06-14 12:34:01,979 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:34:01,980 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1596535679] [2024-06-14 12:34:01,980 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:34:01,980 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:34:01,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:34:02,948 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:34:02,949 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:34:02,949 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1596535679] [2024-06-14 12:34:02,949 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1596535679] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:34:02,949 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:34:02,949 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:34:02,949 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1562952451] [2024-06-14 12:34:02,949 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:34:02,950 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:34:02,950 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:34:02,950 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:34:02,950 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:34:03,043 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 54 [2024-06-14 12:34:03,044 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 134 places, 197 transitions, 2463 flow. Second operand has 9 states, 9 states have (on average 13.444444444444445) internal successors, (121), 9 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:34:03,044 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:34:03,044 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 54 [2024-06-14 12:34:03,044 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:34:05,278 INFO L124 PetriNetUnfolderBase]: 11524/15952 cut-off events. [2024-06-14 12:34:05,278 INFO L125 PetriNetUnfolderBase]: For 348008/348015 co-relation queries the response was YES. [2024-06-14 12:34:05,354 INFO L83 FinitePrefix]: Finished finitePrefix Result has 94381 conditions, 15952 events. 11524/15952 cut-off events. For 348008/348015 co-relation queries the response was YES. Maximal size of possible extension queue 526. Compared 87695 event pairs, 5062 based on Foata normal form. 7/15867 useless extension candidates. Maximal degree in co-relation 94327. Up to 14839 conditions per place. [2024-06-14 12:34:05,431 INFO L140 encePairwiseOnDemand]: 40/54 looper letters, 131 selfloop transitions, 105 changer transitions 0/243 dead transitions. [2024-06-14 12:34:05,431 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 141 places, 243 transitions, 3391 flow [2024-06-14 12:34:05,432 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:34:05,432 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:34:05,432 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 213 transitions. [2024-06-14 12:34:05,432 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4930555555555556 [2024-06-14 12:34:05,433 INFO L175 Difference]: Start difference. First operand has 134 places, 197 transitions, 2463 flow. Second operand 8 states and 213 transitions. [2024-06-14 12:34:05,433 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 141 places, 243 transitions, 3391 flow [2024-06-14 12:34:05,740 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 131 places, 243 transitions, 2863 flow, removed 57 selfloop flow, removed 10 redundant places. [2024-06-14 12:34:05,743 INFO L231 Difference]: Finished difference. Result has 132 places, 197 transitions, 2158 flow [2024-06-14 12:34:05,743 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=1935, PETRI_DIFFERENCE_MINUEND_PLACES=124, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=197, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=105, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=92, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2158, PETRI_PLACES=132, PETRI_TRANSITIONS=197} [2024-06-14 12:34:05,744 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 75 predicate places. [2024-06-14 12:34:05,744 INFO L495 AbstractCegarLoop]: Abstraction has has 132 places, 197 transitions, 2158 flow [2024-06-14 12:34:05,744 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 13.444444444444445) internal successors, (121), 9 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:34:05,744 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:34:05,744 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:34:05,744 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2024-06-14 12:34:05,744 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 12:34:05,744 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:34:05,744 INFO L85 PathProgramCache]: Analyzing trace with hash -1359267521, now seen corresponding path program 1 times [2024-06-14 12:34:05,744 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:34:05,744 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [844532114] [2024-06-14 12:34:05,745 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:34:05,745 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:34:05,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:34:06,720 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:34:06,720 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:34:06,720 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [844532114] [2024-06-14 12:34:06,721 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [844532114] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:34:06,721 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:34:06,721 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 12:34:06,721 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2146542993] [2024-06-14 12:34:06,721 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:34:06,721 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 12:34:06,721 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:34:06,722 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 12:34:06,722 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2024-06-14 12:34:06,848 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 54 [2024-06-14 12:34:06,848 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 132 places, 197 transitions, 2158 flow. Second operand has 8 states, 8 states have (on average 15.75) internal successors, (126), 8 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:34:06,848 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:34:06,849 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 54 [2024-06-14 12:34:06,849 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:34:08,668 INFO L124 PetriNetUnfolderBase]: 9555/14194 cut-off events. [2024-06-14 12:34:08,668 INFO L125 PetriNetUnfolderBase]: For 312892/312909 co-relation queries the response was YES. [2024-06-14 12:34:08,739 INFO L83 FinitePrefix]: Finished finitePrefix Result has 82283 conditions, 14194 events. 9555/14194 cut-off events. For 312892/312909 co-relation queries the response was YES. Maximal size of possible extension queue 508. Compared 86845 event pairs, 4305 based on Foata normal form. 19/14190 useless extension candidates. Maximal degree in co-relation 82231. Up to 12885 conditions per place. [2024-06-14 12:34:08,812 INFO L140 encePairwiseOnDemand]: 44/54 looper letters, 187 selfloop transitions, 14 changer transitions 0/220 dead transitions. [2024-06-14 12:34:08,812 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 137 places, 220 transitions, 2668 flow [2024-06-14 12:34:08,812 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 12:34:08,812 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 12:34:08,812 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 151 transitions. [2024-06-14 12:34:08,813 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4660493827160494 [2024-06-14 12:34:08,813 INFO L175 Difference]: Start difference. First operand has 132 places, 197 transitions, 2158 flow. Second operand 6 states and 151 transitions. [2024-06-14 12:34:08,813 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 137 places, 220 transitions, 2668 flow [2024-06-14 12:34:09,069 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 129 places, 220 transitions, 2379 flow, removed 10 selfloop flow, removed 8 redundant places. [2024-06-14 12:34:09,071 INFO L231 Difference]: Finished difference. Result has 130 places, 201 transitions, 1964 flow [2024-06-14 12:34:09,071 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=1869, PETRI_DIFFERENCE_MINUEND_PLACES=124, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=197, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=183, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1964, PETRI_PLACES=130, PETRI_TRANSITIONS=201} [2024-06-14 12:34:09,072 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 73 predicate places. [2024-06-14 12:34:09,072 INFO L495 AbstractCegarLoop]: Abstraction has has 130 places, 201 transitions, 1964 flow [2024-06-14 12:34:09,072 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.75) internal successors, (126), 8 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:34:09,072 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:34:09,072 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:34:09,072 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2024-06-14 12:34:09,072 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 12:34:09,073 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:34:09,073 INFO L85 PathProgramCache]: Analyzing trace with hash 1200391729, now seen corresponding path program 1 times [2024-06-14 12:34:09,073 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:34:09,073 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1163145483] [2024-06-14 12:34:09,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:34:09,073 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:34:09,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:34:10,112 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:34:10,113 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:34:10,113 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1163145483] [2024-06-14 12:34:10,113 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1163145483] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:34:10,113 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:34:10,113 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:34:10,113 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [739079923] [2024-06-14 12:34:10,113 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:34:10,113 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:34:10,113 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:34:10,114 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:34:10,114 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:34:10,239 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 54 [2024-06-14 12:34:10,239 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 130 places, 201 transitions, 1964 flow. Second operand has 9 states, 9 states have (on average 13.444444444444445) internal successors, (121), 9 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:34:10,239 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:34:10,239 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 54 [2024-06-14 12:34:10,239 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:34:12,469 INFO L124 PetriNetUnfolderBase]: 11597/16283 cut-off events. [2024-06-14 12:34:12,470 INFO L125 PetriNetUnfolderBase]: For 394710/394718 co-relation queries the response was YES. [2024-06-14 12:34:12,546 INFO L83 FinitePrefix]: Finished finitePrefix Result has 97864 conditions, 16283 events. 11597/16283 cut-off events. For 394710/394718 co-relation queries the response was YES. Maximal size of possible extension queue 541. Compared 91327 event pairs, 3948 based on Foata normal form. 14/16277 useless extension candidates. Maximal degree in co-relation 97813. Up to 15428 conditions per place. [2024-06-14 12:34:12,626 INFO L140 encePairwiseOnDemand]: 42/54 looper letters, 214 selfloop transitions, 43 changer transitions 0/264 dead transitions. [2024-06-14 12:34:12,627 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 138 places, 264 transitions, 2920 flow [2024-06-14 12:34:12,627 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:34:12,627 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:34:12,628 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 226 transitions. [2024-06-14 12:34:12,628 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46502057613168724 [2024-06-14 12:34:12,628 INFO L175 Difference]: Start difference. First operand has 130 places, 201 transitions, 1964 flow. Second operand 9 states and 226 transitions. [2024-06-14 12:34:12,628 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 138 places, 264 transitions, 2920 flow [2024-06-14 12:34:12,962 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 134 places, 264 transitions, 2855 flow, removed 21 selfloop flow, removed 4 redundant places. [2024-06-14 12:34:12,965 INFO L231 Difference]: Finished difference. Result has 135 places, 207 transitions, 2133 flow [2024-06-14 12:34:12,965 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=1899, PETRI_DIFFERENCE_MINUEND_PLACES=126, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=201, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=161, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2133, PETRI_PLACES=135, PETRI_TRANSITIONS=207} [2024-06-14 12:34:12,965 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 78 predicate places. [2024-06-14 12:34:12,965 INFO L495 AbstractCegarLoop]: Abstraction has has 135 places, 207 transitions, 2133 flow [2024-06-14 12:34:12,966 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 13.444444444444445) internal successors, (121), 9 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:34:12,966 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:34:12,966 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:34:12,966 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2024-06-14 12:34:12,966 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 12:34:12,966 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:34:12,966 INFO L85 PathProgramCache]: Analyzing trace with hash -121599585, now seen corresponding path program 2 times [2024-06-14 12:34:12,966 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:34:12,966 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1250038167] [2024-06-14 12:34:12,967 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:34:12,967 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:34:12,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:34:14,024 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:34:14,024 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:34:14,024 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1250038167] [2024-06-14 12:34:14,024 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1250038167] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:34:14,024 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:34:14,024 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:34:14,024 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [170266902] [2024-06-14 12:34:14,024 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:34:14,024 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:34:14,025 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:34:14,025 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:34:14,025 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:34:14,150 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 54 [2024-06-14 12:34:14,150 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 135 places, 207 transitions, 2133 flow. Second operand has 9 states, 9 states have (on average 13.444444444444445) internal successors, (121), 9 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:34:14,150 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:34:14,150 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 54 [2024-06-14 12:34:14,150 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:34:16,515 INFO L124 PetriNetUnfolderBase]: 11582/16262 cut-off events. [2024-06-14 12:34:16,515 INFO L125 PetriNetUnfolderBase]: For 433112/433120 co-relation queries the response was YES. [2024-06-14 12:34:16,561 INFO L83 FinitePrefix]: Finished finitePrefix Result has 100514 conditions, 16262 events. 11582/16262 cut-off events. For 433112/433120 co-relation queries the response was YES. Maximal size of possible extension queue 541. Compared 91152 event pairs, 4701 based on Foata normal form. 14/16256 useless extension candidates. Maximal degree in co-relation 100462. Up to 15514 conditions per place. [2024-06-14 12:34:16,637 INFO L140 encePairwiseOnDemand]: 42/54 looper letters, 209 selfloop transitions, 37 changer transitions 0/253 dead transitions. [2024-06-14 12:34:16,637 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 142 places, 253 transitions, 2777 flow [2024-06-14 12:34:16,638 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:34:16,638 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:34:16,638 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 199 transitions. [2024-06-14 12:34:16,638 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46064814814814814 [2024-06-14 12:34:16,638 INFO L175 Difference]: Start difference. First operand has 135 places, 207 transitions, 2133 flow. Second operand 8 states and 199 transitions. [2024-06-14 12:34:16,638 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 142 places, 253 transitions, 2777 flow [2024-06-14 12:34:17,031 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 137 places, 253 transitions, 2620 flow, removed 58 selfloop flow, removed 5 redundant places. [2024-06-14 12:34:17,034 INFO L231 Difference]: Finished difference. Result has 138 places, 207 transitions, 2061 flow [2024-06-14 12:34:17,034 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=1976, PETRI_DIFFERENCE_MINUEND_PLACES=130, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=207, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=170, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2061, PETRI_PLACES=138, PETRI_TRANSITIONS=207} [2024-06-14 12:34:17,035 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 81 predicate places. [2024-06-14 12:34:17,035 INFO L495 AbstractCegarLoop]: Abstraction has has 138 places, 207 transitions, 2061 flow [2024-06-14 12:34:17,035 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 13.444444444444445) internal successors, (121), 9 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:34:17,035 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:34:17,035 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:34:17,035 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2024-06-14 12:34:17,035 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 12:34:17,035 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:34:17,036 INFO L85 PathProgramCache]: Analyzing trace with hash -1279805455, now seen corresponding path program 3 times [2024-06-14 12:34:17,036 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:34:17,036 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1522274029] [2024-06-14 12:34:17,036 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:34:17,036 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:34:17,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:34:18,067 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:34:18,068 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:34:18,068 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1522274029] [2024-06-14 12:34:18,068 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1522274029] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:34:18,068 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:34:18,068 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:34:18,068 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1789216187] [2024-06-14 12:34:18,068 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:34:18,068 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:34:18,069 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:34:18,069 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:34:18,069 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:34:18,209 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 54 [2024-06-14 12:34:18,210 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 138 places, 207 transitions, 2061 flow. Second operand has 9 states, 9 states have (on average 13.444444444444445) internal successors, (121), 9 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:34:18,210 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:34:18,210 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 54 [2024-06-14 12:34:18,210 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:34:20,719 INFO L124 PetriNetUnfolderBase]: 11618/16313 cut-off events. [2024-06-14 12:34:20,719 INFO L125 PetriNetUnfolderBase]: For 462689/462699 co-relation queries the response was YES. [2024-06-14 12:34:20,785 INFO L83 FinitePrefix]: Finished finitePrefix Result has 101810 conditions, 16313 events. 11618/16313 cut-off events. For 462689/462699 co-relation queries the response was YES. Maximal size of possible extension queue 541. Compared 91545 event pairs, 4714 based on Foata normal form. 12/16304 useless extension candidates. Maximal degree in co-relation 101756. Up to 15491 conditions per place. [2024-06-14 12:34:20,879 INFO L140 encePairwiseOnDemand]: 42/54 looper letters, 191 selfloop transitions, 53 changer transitions 0/251 dead transitions. [2024-06-14 12:34:20,879 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 145 places, 251 transitions, 2749 flow [2024-06-14 12:34:20,880 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:34:20,880 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:34:20,880 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 200 transitions. [2024-06-14 12:34:20,880 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46296296296296297 [2024-06-14 12:34:20,881 INFO L175 Difference]: Start difference. First operand has 138 places, 207 transitions, 2061 flow. Second operand 8 states and 200 transitions. [2024-06-14 12:34:20,881 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 145 places, 251 transitions, 2749 flow [2024-06-14 12:34:21,262 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 138 places, 251 transitions, 2665 flow, removed 2 selfloop flow, removed 7 redundant places. [2024-06-14 12:34:21,265 INFO L231 Difference]: Finished difference. Result has 139 places, 210 transitions, 2171 flow [2024-06-14 12:34:21,265 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=1977, PETRI_DIFFERENCE_MINUEND_PLACES=131, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=207, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=50, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=154, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2171, PETRI_PLACES=139, PETRI_TRANSITIONS=210} [2024-06-14 12:34:21,266 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 82 predicate places. [2024-06-14 12:34:21,266 INFO L495 AbstractCegarLoop]: Abstraction has has 139 places, 210 transitions, 2171 flow [2024-06-14 12:34:21,266 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 13.444444444444445) internal successors, (121), 9 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:34:21,266 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:34:21,266 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:34:21,266 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2024-06-14 12:34:21,266 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 12:34:21,266 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:34:21,266 INFO L85 PathProgramCache]: Analyzing trace with hash -3327207, now seen corresponding path program 1 times [2024-06-14 12:34:21,267 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:34:21,267 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2052268748] [2024-06-14 12:34:21,267 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:34:21,267 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:34:21,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:34:22,285 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:34:22,285 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:34:22,285 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2052268748] [2024-06-14 12:34:22,285 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2052268748] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:34:22,285 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:34:22,285 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:34:22,285 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2027845992] [2024-06-14 12:34:22,285 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:34:22,286 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:34:22,286 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:34:22,286 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:34:22,286 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:34:22,401 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 54 [2024-06-14 12:34:22,402 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 139 places, 210 transitions, 2171 flow. Second operand has 9 states, 9 states have (on average 13.444444444444445) internal successors, (121), 9 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:34:22,402 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:34:22,402 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 54 [2024-06-14 12:34:22,402 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:34:24,814 INFO L124 PetriNetUnfolderBase]: 11689/16390 cut-off events. [2024-06-14 12:34:24,814 INFO L125 PetriNetUnfolderBase]: For 510727/510741 co-relation queries the response was YES. [2024-06-14 12:34:24,875 INFO L83 FinitePrefix]: Finished finitePrefix Result has 105299 conditions, 16390 events. 11689/16390 cut-off events. For 510727/510741 co-relation queries the response was YES. Maximal size of possible extension queue 540. Compared 91857 event pairs, 4664 based on Foata normal form. 22/16374 useless extension candidates. Maximal degree in co-relation 105244. Up to 15453 conditions per place. [2024-06-14 12:34:24,956 INFO L140 encePairwiseOnDemand]: 41/54 looper letters, 199 selfloop transitions, 58 changer transitions 0/264 dead transitions. [2024-06-14 12:34:24,956 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 146 places, 264 transitions, 3221 flow [2024-06-14 12:34:24,957 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:34:24,957 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:34:24,957 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 212 transitions. [2024-06-14 12:34:24,957 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49074074074074076 [2024-06-14 12:34:24,957 INFO L175 Difference]: Start difference. First operand has 139 places, 210 transitions, 2171 flow. Second operand 8 states and 212 transitions. [2024-06-14 12:34:24,957 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 146 places, 264 transitions, 3221 flow [2024-06-14 12:34:25,350 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 140 places, 264 transitions, 3053 flow, removed 33 selfloop flow, removed 6 redundant places. [2024-06-14 12:34:25,353 INFO L231 Difference]: Finished difference. Result has 141 places, 214 transitions, 2216 flow [2024-06-14 12:34:25,354 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=2003, PETRI_DIFFERENCE_MINUEND_PLACES=133, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=210, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=54, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=152, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2216, PETRI_PLACES=141, PETRI_TRANSITIONS=214} [2024-06-14 12:34:25,354 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 84 predicate places. [2024-06-14 12:34:25,354 INFO L495 AbstractCegarLoop]: Abstraction has has 141 places, 214 transitions, 2216 flow [2024-06-14 12:34:25,354 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 13.444444444444445) internal successors, (121), 9 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:34:25,354 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:34:25,354 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:34:25,354 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2024-06-14 12:34:25,354 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 12:34:25,355 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:34:25,355 INFO L85 PathProgramCache]: Analyzing trace with hash -401127242, now seen corresponding path program 1 times [2024-06-14 12:34:25,355 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:34:25,355 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1481521237] [2024-06-14 12:34:25,355 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:34:25,355 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:34:25,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:34:26,320 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:34:26,320 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:34:26,320 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1481521237] [2024-06-14 12:34:26,320 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1481521237] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:34:26,321 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:34:26,321 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 12:34:26,321 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1696473239] [2024-06-14 12:34:26,321 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:34:26,322 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 12:34:26,322 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:34:26,322 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 12:34:26,322 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2024-06-14 12:34:26,396 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 54 [2024-06-14 12:34:26,396 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 141 places, 214 transitions, 2216 flow. Second operand has 8 states, 8 states have (on average 14.75) internal successors, (118), 8 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:34:26,396 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:34:26,396 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 54 [2024-06-14 12:34:26,397 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:34:28,681 INFO L124 PetriNetUnfolderBase]: 11095/15789 cut-off events. [2024-06-14 12:34:28,682 INFO L125 PetriNetUnfolderBase]: For 540365/540403 co-relation queries the response was YES. [2024-06-14 12:34:28,760 INFO L83 FinitePrefix]: Finished finitePrefix Result has 105522 conditions, 15789 events. 11095/15789 cut-off events. For 540365/540403 co-relation queries the response was YES. Maximal size of possible extension queue 537. Compared 91115 event pairs, 4663 based on Foata normal form. 27/15786 useless extension candidates. Maximal degree in co-relation 105466. Up to 14832 conditions per place. [2024-06-14 12:34:28,844 INFO L140 encePairwiseOnDemand]: 44/54 looper letters, 186 selfloop transitions, 41 changer transitions 0/246 dead transitions. [2024-06-14 12:34:28,844 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 146 places, 246 transitions, 2951 flow [2024-06-14 12:34:28,844 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 12:34:28,844 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 12:34:28,845 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 155 transitions. [2024-06-14 12:34:28,845 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4783950617283951 [2024-06-14 12:34:28,845 INFO L175 Difference]: Start difference. First operand has 141 places, 214 transitions, 2216 flow. Second operand 6 states and 155 transitions. [2024-06-14 12:34:28,845 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 146 places, 246 transitions, 2951 flow [2024-06-14 12:34:29,301 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 140 places, 246 transitions, 2764 flow, removed 35 selfloop flow, removed 6 redundant places. [2024-06-14 12:34:29,306 INFO L231 Difference]: Finished difference. Result has 141 places, 221 transitions, 2228 flow [2024-06-14 12:34:29,306 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=2035, PETRI_DIFFERENCE_MINUEND_PLACES=135, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=214, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=180, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2228, PETRI_PLACES=141, PETRI_TRANSITIONS=221} [2024-06-14 12:34:29,306 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 84 predicate places. [2024-06-14 12:34:29,306 INFO L495 AbstractCegarLoop]: Abstraction has has 141 places, 221 transitions, 2228 flow [2024-06-14 12:34:29,307 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 14.75) internal successors, (118), 8 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:34:29,307 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:34:29,307 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:34:29,307 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2024-06-14 12:34:29,307 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 12:34:29,307 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:34:29,307 INFO L85 PathProgramCache]: Analyzing trace with hash 603582739, now seen corresponding path program 4 times [2024-06-14 12:34:29,308 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:34:29,308 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1008225523] [2024-06-14 12:34:29,308 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:34:29,308 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:34:29,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:34:30,339 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:34:30,339 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:34:30,339 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1008225523] [2024-06-14 12:34:30,339 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1008225523] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:34:30,339 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:34:30,340 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:34:30,340 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1401099850] [2024-06-14 12:34:30,340 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:34:30,340 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:34:30,340 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:34:30,340 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:34:30,340 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:34:30,436 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 54 [2024-06-14 12:34:30,436 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 141 places, 221 transitions, 2228 flow. Second operand has 9 states, 9 states have (on average 13.444444444444445) internal successors, (121), 9 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:34:30,436 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:34:30,436 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 54 [2024-06-14 12:34:30,436 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:34:33,285 INFO L124 PetriNetUnfolderBase]: 11706/16405 cut-off events. [2024-06-14 12:34:33,285 INFO L125 PetriNetUnfolderBase]: For 572706/572710 co-relation queries the response was YES. [2024-06-14 12:34:33,353 INFO L83 FinitePrefix]: Finished finitePrefix Result has 109147 conditions, 16405 events. 11706/16405 cut-off events. For 572706/572710 co-relation queries the response was YES. Maximal size of possible extension queue 537. Compared 91721 event pairs, 4678 based on Foata normal form. 6/16381 useless extension candidates. Maximal degree in co-relation 109090. Up to 15613 conditions per place. [2024-06-14 12:34:33,451 INFO L140 encePairwiseOnDemand]: 42/54 looper letters, 203 selfloop transitions, 53 changer transitions 0/263 dead transitions. [2024-06-14 12:34:33,451 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 148 places, 263 transitions, 2944 flow [2024-06-14 12:34:33,452 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:34:33,452 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:34:33,453 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 197 transitions. [2024-06-14 12:34:33,453 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45601851851851855 [2024-06-14 12:34:33,453 INFO L175 Difference]: Start difference. First operand has 141 places, 221 transitions, 2228 flow. Second operand 8 states and 197 transitions. [2024-06-14 12:34:33,453 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 148 places, 263 transitions, 2944 flow [2024-06-14 12:34:33,952 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 145 places, 263 transitions, 2857 flow, removed 22 selfloop flow, removed 3 redundant places. [2024-06-14 12:34:33,955 INFO L231 Difference]: Finished difference. Result has 146 places, 224 transitions, 2345 flow [2024-06-14 12:34:33,955 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=2141, PETRI_DIFFERENCE_MINUEND_PLACES=138, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=221, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=50, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=168, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2345, PETRI_PLACES=146, PETRI_TRANSITIONS=224} [2024-06-14 12:34:33,956 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 89 predicate places. [2024-06-14 12:34:33,956 INFO L495 AbstractCegarLoop]: Abstraction has has 146 places, 224 transitions, 2345 flow [2024-06-14 12:34:33,956 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 13.444444444444445) internal successors, (121), 9 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:34:33,956 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:34:33,956 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:34:33,957 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2024-06-14 12:34:33,957 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 12:34:33,957 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:34:33,957 INFO L85 PathProgramCache]: Analyzing trace with hash 603767437, now seen corresponding path program 2 times [2024-06-14 12:34:33,957 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:34:33,957 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [338062447] [2024-06-14 12:34:33,957 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:34:33,958 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:34:33,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:34:35,235 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:34:35,236 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:34:35,236 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [338062447] [2024-06-14 12:34:35,236 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [338062447] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:34:35,236 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:34:35,236 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:34:35,236 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1400509496] [2024-06-14 12:34:35,236 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:34:35,236 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:34:35,236 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:34:35,236 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:34:35,236 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:34:35,357 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 54 [2024-06-14 12:34:35,357 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 146 places, 224 transitions, 2345 flow. Second operand has 9 states, 9 states have (on average 13.444444444444445) internal successors, (121), 9 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:34:35,357 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:34:35,357 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 54 [2024-06-14 12:34:35,357 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:34:37,937 INFO L124 PetriNetUnfolderBase]: 11777/16521 cut-off events. [2024-06-14 12:34:37,938 INFO L125 PetriNetUnfolderBase]: For 627499/627522 co-relation queries the response was YES. [2024-06-14 12:34:37,996 INFO L83 FinitePrefix]: Finished finitePrefix Result has 112732 conditions, 16521 events. 11777/16521 cut-off events. For 627499/627522 co-relation queries the response was YES. Maximal size of possible extension queue 540. Compared 92726 event pairs, 4651 based on Foata normal form. 28/16511 useless extension candidates. Maximal degree in co-relation 112674. Up to 15566 conditions per place. [2024-06-14 12:34:38,078 INFO L140 encePairwiseOnDemand]: 41/54 looper letters, 208 selfloop transitions, 61 changer transitions 0/276 dead transitions. [2024-06-14 12:34:38,078 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 153 places, 276 transitions, 3461 flow [2024-06-14 12:34:38,079 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:34:38,079 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:34:38,079 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 208 transitions. [2024-06-14 12:34:38,079 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48148148148148145 [2024-06-14 12:34:38,080 INFO L175 Difference]: Start difference. First operand has 146 places, 224 transitions, 2345 flow. Second operand 8 states and 208 transitions. [2024-06-14 12:34:38,080 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 153 places, 276 transitions, 3461 flow [2024-06-14 12:34:38,553 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 147 places, 276 transitions, 3283 flow, removed 38 selfloop flow, removed 6 redundant places. [2024-06-14 12:34:38,556 INFO L231 Difference]: Finished difference. Result has 148 places, 228 transitions, 2398 flow [2024-06-14 12:34:38,556 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=2167, PETRI_DIFFERENCE_MINUEND_PLACES=140, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=224, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=57, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=163, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2398, PETRI_PLACES=148, PETRI_TRANSITIONS=228} [2024-06-14 12:34:38,557 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 91 predicate places. [2024-06-14 12:34:38,557 INFO L495 AbstractCegarLoop]: Abstraction has has 148 places, 228 transitions, 2398 flow [2024-06-14 12:34:38,557 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 13.444444444444445) internal successors, (121), 9 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:34:38,557 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:34:38,557 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:34:38,557 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2024-06-14 12:34:38,558 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 12:34:38,558 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:34:38,558 INFO L85 PathProgramCache]: Analyzing trace with hash 839942797, now seen corresponding path program 3 times [2024-06-14 12:34:38,558 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:34:38,558 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [672538036] [2024-06-14 12:34:38,558 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:34:38,558 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:34:38,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:34:39,714 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:34:39,715 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:34:39,715 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [672538036] [2024-06-14 12:34:39,715 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [672538036] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:34:39,715 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:34:39,715 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:34:39,715 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [730274860] [2024-06-14 12:34:39,715 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:34:39,715 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:34:39,715 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:34:39,716 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:34:39,716 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:34:39,821 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 54 [2024-06-14 12:34:39,822 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 148 places, 228 transitions, 2398 flow. Second operand has 9 states, 9 states have (on average 13.444444444444445) internal successors, (121), 9 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:34:39,822 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:34:39,822 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 54 [2024-06-14 12:34:39,822 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:34:42,531 INFO L124 PetriNetUnfolderBase]: 11848/16622 cut-off events. [2024-06-14 12:34:42,531 INFO L125 PetriNetUnfolderBase]: For 675324/675347 co-relation queries the response was YES. [2024-06-14 12:34:42,595 INFO L83 FinitePrefix]: Finished finitePrefix Result has 116809 conditions, 16622 events. 11848/16622 cut-off events. For 675324/675347 co-relation queries the response was YES. Maximal size of possible extension queue 540. Compared 93213 event pairs, 4659 based on Foata normal form. 28/16612 useless extension candidates. Maximal degree in co-relation 116750. Up to 15667 conditions per place. [2024-06-14 12:34:42,683 INFO L140 encePairwiseOnDemand]: 41/54 looper letters, 205 selfloop transitions, 66 changer transitions 0/278 dead transitions. [2024-06-14 12:34:42,683 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 155 places, 278 transitions, 3418 flow [2024-06-14 12:34:42,683 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:34:42,684 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:34:42,684 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 206 transitions. [2024-06-14 12:34:42,684 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47685185185185186 [2024-06-14 12:34:42,684 INFO L175 Difference]: Start difference. First operand has 148 places, 228 transitions, 2398 flow. Second operand 8 states and 206 transitions. [2024-06-14 12:34:42,684 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 155 places, 278 transitions, 3418 flow [2024-06-14 12:34:43,177 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 149 places, 278 transitions, 3219 flow, removed 41 selfloop flow, removed 6 redundant places. [2024-06-14 12:34:43,180 INFO L231 Difference]: Finished difference. Result has 150 places, 232 transitions, 2448 flow [2024-06-14 12:34:43,180 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=2199, PETRI_DIFFERENCE_MINUEND_PLACES=142, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=228, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=62, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=162, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2448, PETRI_PLACES=150, PETRI_TRANSITIONS=232} [2024-06-14 12:34:43,180 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 93 predicate places. [2024-06-14 12:34:43,180 INFO L495 AbstractCegarLoop]: Abstraction has has 150 places, 232 transitions, 2448 flow [2024-06-14 12:34:43,181 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 13.444444444444445) internal successors, (121), 9 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:34:43,181 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:34:43,181 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:34:43,181 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2024-06-14 12:34:43,181 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 12:34:43,181 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:34:43,181 INFO L85 PathProgramCache]: Analyzing trace with hash 840239467, now seen corresponding path program 4 times [2024-06-14 12:34:43,182 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:34:43,182 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1386037424] [2024-06-14 12:34:43,182 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:34:43,182 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:34:43,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:34:44,332 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:34:44,332 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:34:44,332 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1386037424] [2024-06-14 12:34:44,332 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1386037424] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:34:44,332 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:34:44,332 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:34:44,332 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [54031510] [2024-06-14 12:34:44,332 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:34:44,332 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:34:44,332 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:34:44,333 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:34:44,333 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:34:44,472 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 54 [2024-06-14 12:34:44,473 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 150 places, 232 transitions, 2448 flow. Second operand has 9 states, 9 states have (on average 13.444444444444445) internal successors, (121), 9 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:34:44,473 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:34:44,473 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 54 [2024-06-14 12:34:44,473 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:34:47,122 INFO L124 PetriNetUnfolderBase]: 11868/16650 cut-off events. [2024-06-14 12:34:47,123 INFO L125 PetriNetUnfolderBase]: For 719839/719862 co-relation queries the response was YES. [2024-06-14 12:34:47,202 INFO L83 FinitePrefix]: Finished finitePrefix Result has 119800 conditions, 16650 events. 11868/16650 cut-off events. For 719839/719862 co-relation queries the response was YES. Maximal size of possible extension queue 540. Compared 93442 event pairs, 4362 based on Foata normal form. 28/16640 useless extension candidates. Maximal degree in co-relation 119740. Up to 15472 conditions per place. [2024-06-14 12:34:47,292 INFO L140 encePairwiseOnDemand]: 41/54 looper letters, 195 selfloop transitions, 81 changer transitions 0/283 dead transitions. [2024-06-14 12:34:47,293 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 157 places, 283 transitions, 3496 flow [2024-06-14 12:34:47,293 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:34:47,293 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:34:47,294 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 207 transitions. [2024-06-14 12:34:47,294 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4791666666666667 [2024-06-14 12:34:47,294 INFO L175 Difference]: Start difference. First operand has 150 places, 232 transitions, 2448 flow. Second operand 8 states and 207 transitions. [2024-06-14 12:34:47,294 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 157 places, 283 transitions, 3496 flow [2024-06-14 12:34:47,930 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 151 places, 283 transitions, 3279 flow, removed 45 selfloop flow, removed 6 redundant places. [2024-06-14 12:34:47,933 INFO L231 Difference]: Finished difference. Result has 152 places, 236 transitions, 2518 flow [2024-06-14 12:34:47,934 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=2231, PETRI_DIFFERENCE_MINUEND_PLACES=144, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=232, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=77, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=151, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2518, PETRI_PLACES=152, PETRI_TRANSITIONS=236} [2024-06-14 12:34:47,934 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 95 predicate places. [2024-06-14 12:34:47,934 INFO L495 AbstractCegarLoop]: Abstraction has has 152 places, 236 transitions, 2518 flow [2024-06-14 12:34:47,934 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 13.444444444444445) internal successors, (121), 9 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:34:47,934 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:34:47,934 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:34:47,934 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2024-06-14 12:34:47,935 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 12:34:47,935 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:34:47,935 INFO L85 PathProgramCache]: Analyzing trace with hash 812367448, now seen corresponding path program 2 times [2024-06-14 12:34:47,935 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:34:47,935 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1454584457] [2024-06-14 12:34:47,935 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:34:47,935 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:34:47,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:34:49,026 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:34:49,026 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:34:49,026 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1454584457] [2024-06-14 12:34:49,026 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1454584457] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:34:49,026 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:34:49,026 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 12:34:49,026 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [180921864] [2024-06-14 12:34:49,026 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:34:49,027 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 12:34:49,027 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:34:49,027 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 12:34:49,027 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2024-06-14 12:34:49,098 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 54 [2024-06-14 12:34:49,098 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 152 places, 236 transitions, 2518 flow. Second operand has 8 states, 8 states have (on average 14.75) internal successors, (118), 8 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:34:49,099 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:34:49,099 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 54 [2024-06-14 12:34:49,099 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:34:51,600 INFO L124 PetriNetUnfolderBase]: 11185/15937 cut-off events. [2024-06-14 12:34:51,600 INFO L125 PetriNetUnfolderBase]: For 751243/751258 co-relation queries the response was YES. [2024-06-14 12:34:51,678 INFO L83 FinitePrefix]: Finished finitePrefix Result has 117334 conditions, 15937 events. 11185/15937 cut-off events. For 751243/751258 co-relation queries the response was YES. Maximal size of possible extension queue 540. Compared 92209 event pairs, 4675 based on Foata normal form. 15/15907 useless extension candidates. Maximal degree in co-relation 117273. Up to 14961 conditions per place. [2024-06-14 12:34:51,761 INFO L140 encePairwiseOnDemand]: 44/54 looper letters, 191 selfloop transitions, 41 changer transitions 0/254 dead transitions. [2024-06-14 12:34:51,762 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 157 places, 254 transitions, 3038 flow [2024-06-14 12:34:51,762 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 12:34:51,762 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 12:34:51,762 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 147 transitions. [2024-06-14 12:34:51,762 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4537037037037037 [2024-06-14 12:34:51,763 INFO L175 Difference]: Start difference. First operand has 152 places, 236 transitions, 2518 flow. Second operand 6 states and 147 transitions. [2024-06-14 12:34:51,763 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 157 places, 254 transitions, 3038 flow [2024-06-14 12:34:52,424 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 151 places, 254 transitions, 2753 flow, removed 64 selfloop flow, removed 6 redundant places. [2024-06-14 12:34:52,427 INFO L231 Difference]: Finished difference. Result has 152 places, 236 transitions, 2327 flow [2024-06-14 12:34:52,427 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=2233, PETRI_DIFFERENCE_MINUEND_PLACES=146, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=236, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=195, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2327, PETRI_PLACES=152, PETRI_TRANSITIONS=236} [2024-06-14 12:34:52,427 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 95 predicate places. [2024-06-14 12:34:52,427 INFO L495 AbstractCegarLoop]: Abstraction has has 152 places, 236 transitions, 2327 flow [2024-06-14 12:34:52,428 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 14.75) internal successors, (118), 8 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:34:52,428 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:34:52,428 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:34:52,428 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2024-06-14 12:34:52,428 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 12:34:52,428 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:34:52,428 INFO L85 PathProgramCache]: Analyzing trace with hash 1754853142, now seen corresponding path program 1 times [2024-06-14 12:34:52,428 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:34:52,428 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [191709362] [2024-06-14 12:34:52,428 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:34:52,428 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:34:52,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:34:53,362 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:34:53,363 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:34:53,363 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [191709362] [2024-06-14 12:34:53,363 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [191709362] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:34:53,363 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:34:53,363 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 12:34:53,363 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [911466472] [2024-06-14 12:34:53,363 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:34:53,363 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 12:34:53,363 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:34:53,363 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 12:34:53,363 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2024-06-14 12:34:53,466 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 54 [2024-06-14 12:34:53,467 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 152 places, 236 transitions, 2327 flow. Second operand has 8 states, 8 states have (on average 14.75) internal successors, (118), 8 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:34:53,467 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:34:53,467 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 54 [2024-06-14 12:34:53,467 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:34:56,142 INFO L124 PetriNetUnfolderBase]: 10468/15155 cut-off events. [2024-06-14 12:34:56,142 INFO L125 PetriNetUnfolderBase]: For 684575/684583 co-relation queries the response was YES. [2024-06-14 12:34:56,196 INFO L83 FinitePrefix]: Finished finitePrefix Result has 109341 conditions, 15155 events. 10468/15155 cut-off events. For 684575/684583 co-relation queries the response was YES. Maximal size of possible extension queue 501. Compared 88946 event pairs, 3999 based on Foata normal form. 8/15106 useless extension candidates. Maximal degree in co-relation 109279. Up to 14134 conditions per place. [2024-06-14 12:34:56,272 INFO L140 encePairwiseOnDemand]: 43/54 looper letters, 230 selfloop transitions, 25 changer transitions 0/263 dead transitions. [2024-06-14 12:34:56,272 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 157 places, 263 transitions, 3084 flow [2024-06-14 12:34:56,272 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 12:34:56,272 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 12:34:56,272 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 154 transitions. [2024-06-14 12:34:56,273 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47530864197530864 [2024-06-14 12:34:56,273 INFO L175 Difference]: Start difference. First operand has 152 places, 236 transitions, 2327 flow. Second operand 6 states and 154 transitions. [2024-06-14 12:34:56,273 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 157 places, 263 transitions, 3084 flow [2024-06-14 12:34:56,686 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 152 places, 263 transitions, 2969 flow, removed 7 selfloop flow, removed 5 redundant places. [2024-06-14 12:34:56,689 INFO L231 Difference]: Finished difference. Result has 153 places, 240 transitions, 2324 flow [2024-06-14 12:34:56,689 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=2212, PETRI_DIFFERENCE_MINUEND_PLACES=147, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=236, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=214, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2324, PETRI_PLACES=153, PETRI_TRANSITIONS=240} [2024-06-14 12:34:56,690 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 96 predicate places. [2024-06-14 12:34:56,690 INFO L495 AbstractCegarLoop]: Abstraction has has 153 places, 240 transitions, 2324 flow [2024-06-14 12:34:56,690 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 14.75) internal successors, (118), 8 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:34:56,690 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:34:56,690 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:34:56,690 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2024-06-14 12:34:56,690 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 12:34:56,690 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:34:56,691 INFO L85 PathProgramCache]: Analyzing trace with hash 813411280, now seen corresponding path program 2 times [2024-06-14 12:34:56,691 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:34:56,691 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1004085934] [2024-06-14 12:34:56,691 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:34:56,691 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:34:56,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:34:57,702 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:34:57,703 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:34:57,703 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1004085934] [2024-06-14 12:34:57,703 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1004085934] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:34:57,703 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:34:57,703 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 12:34:57,703 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1870250436] [2024-06-14 12:34:57,703 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:34:57,703 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 12:34:57,703 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:34:57,704 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 12:34:57,704 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2024-06-14 12:34:57,793 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 54 [2024-06-14 12:34:57,793 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 153 places, 240 transitions, 2324 flow. Second operand has 8 states, 8 states have (on average 14.75) internal successors, (118), 8 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:34:57,793 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:34:57,793 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 54 [2024-06-14 12:34:57,793 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:34:59,999 INFO L124 PetriNetUnfolderBase]: 10422/15080 cut-off events. [2024-06-14 12:34:59,999 INFO L125 PetriNetUnfolderBase]: For 713167/713169 co-relation queries the response was YES. [2024-06-14 12:35:00,063 INFO L83 FinitePrefix]: Finished finitePrefix Result has 109934 conditions, 15080 events. 10422/15080 cut-off events. For 713167/713169 co-relation queries the response was YES. Maximal size of possible extension queue 501. Compared 88393 event pairs, 4011 based on Foata normal form. 2/15022 useless extension candidates. Maximal degree in co-relation 109871. Up to 14072 conditions per place. [2024-06-14 12:35:00,143 INFO L140 encePairwiseOnDemand]: 43/54 looper letters, 224 selfloop transitions, 26 changer transitions 0/258 dead transitions. [2024-06-14 12:35:00,143 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 158 places, 258 transitions, 2880 flow [2024-06-14 12:35:00,144 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 12:35:00,144 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 12:35:00,144 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 150 transitions. [2024-06-14 12:35:00,144 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46296296296296297 [2024-06-14 12:35:00,144 INFO L175 Difference]: Start difference. First operand has 153 places, 240 transitions, 2324 flow. Second operand 6 states and 150 transitions. [2024-06-14 12:35:00,144 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 158 places, 258 transitions, 2880 flow [2024-06-14 12:35:00,631 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 155 places, 258 transitions, 2829 flow, removed 11 selfloop flow, removed 3 redundant places. [2024-06-14 12:35:00,634 INFO L231 Difference]: Finished difference. Result has 156 places, 240 transitions, 2334 flow [2024-06-14 12:35:00,634 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=2273, PETRI_DIFFERENCE_MINUEND_PLACES=150, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=240, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=214, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2334, PETRI_PLACES=156, PETRI_TRANSITIONS=240} [2024-06-14 12:35:00,635 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 99 predicate places. [2024-06-14 12:35:00,635 INFO L495 AbstractCegarLoop]: Abstraction has has 156 places, 240 transitions, 2334 flow [2024-06-14 12:35:00,635 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 14.75) internal successors, (118), 8 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:35:00,635 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:35:00,635 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:35:00,635 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2024-06-14 12:35:00,635 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 12:35:00,635 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:35:00,635 INFO L85 PathProgramCache]: Analyzing trace with hash 523508121, now seen corresponding path program 1 times [2024-06-14 12:35:00,635 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:35:00,635 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [377210053] [2024-06-14 12:35:00,635 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:35:00,635 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:35:00,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:35:02,020 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:35:02,020 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:35:02,020 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [377210053] [2024-06-14 12:35:02,020 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [377210053] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:35:02,020 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:35:02,020 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:35:02,020 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1225997680] [2024-06-14 12:35:02,020 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:35:02,020 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:35:02,021 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:35:02,021 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:35:02,021 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:35:02,160 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 54 [2024-06-14 12:35:02,160 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 156 places, 240 transitions, 2334 flow. Second operand has 10 states, 10 states have (on average 13.4) internal successors, (134), 10 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:35:02,161 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:35:02,161 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 54 [2024-06-14 12:35:02,161 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand