./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/pthread-wmm/safe025_rmo.i --full-output --witness-type correctness_witness --witnessparser.only.consider.loop.invariants false --cacsl2boogietranslator.check.unreachability.of.reach_error.function false --validate ./goblint.2024-06-19_11-23-25.files/protection/safe025_rmo.yml/witness.yml --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 7724a2de 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/safe025_rmo.i ./goblint.2024-06-19_11-23-25.files/protection/safe025_rmo.yml/witness.yml -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --traceabstraction.compute.hoare.annotation.of.negated.interpolant.automaton,.abstraction.and.cfg false --witnessparser.only.consider.loop.invariants false --cacsl2boogietranslator.check.unreachability.of.reach_error.function false --- Real Ultimate output --- This is Ultimate 0.2.4-tmp.fs.goblint-validation-7724a2d-m [2024-06-27 21:26:53,270 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-06-27 21:26:53,341 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-06-27 21:26:53,347 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-06-27 21:26:53,347 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-06-27 21:26:53,370 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-06-27 21:26:53,371 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-06-27 21:26:53,371 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-06-27 21:26:53,372 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-06-27 21:26:53,375 INFO L153 SettingsManager]: * Use memory slicer=true [2024-06-27 21:26:53,375 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-06-27 21:26:53,375 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-06-27 21:26:53,376 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-06-27 21:26:53,377 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-06-27 21:26:53,377 INFO L153 SettingsManager]: * Use SBE=true [2024-06-27 21:26:53,378 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-06-27 21:26:53,378 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-06-27 21:26:53,378 INFO L153 SettingsManager]: * sizeof long=4 [2024-06-27 21:26:53,378 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-06-27 21:26:53,379 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-06-27 21:26:53,379 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-06-27 21:26:53,379 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-06-27 21:26:53,379 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-06-27 21:26:53,380 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-06-27 21:26:53,380 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-06-27 21:26:53,380 INFO L153 SettingsManager]: * sizeof long double=12 [2024-06-27 21:26:53,380 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-06-27 21:26:53,380 INFO L153 SettingsManager]: * Use constant arrays=true [2024-06-27 21:26:53,381 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-06-27 21:26:53,381 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-06-27 21:26:53,382 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-06-27 21:26:53,382 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-06-27 21:26:53,382 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-27 21:26:53,382 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-06-27 21:26:53,383 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-06-27 21:26:53,383 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-06-27 21:26:53,383 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-06-27 21:26:53,383 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-06-27 21:26:53,383 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-06-27 21:26:53,383 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-06-27 21:26:53,384 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-06-27 21:26:53,384 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-06-27 21:26:53,384 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-06-27 21:26:53,384 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check unreachability of reach_error function -> false [2024-06-27 21:26:53,580 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-06-27 21:26:53,613 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-06-27 21:26:53,615 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-06-27 21:26:53,616 INFO L270 PluginConnector]: Initializing CDTParser... [2024-06-27 21:26:53,616 INFO L274 PluginConnector]: CDTParser initialized [2024-06-27 21:26:53,617 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-wmm/safe025_rmo.i [2024-06-27 21:26:54,643 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-06-27 21:26:54,822 INFO L384 CDTParser]: Found 1 translation units. [2024-06-27 21:26:54,823 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/safe025_rmo.i [2024-06-27 21:26:54,835 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f9ca11a0c/54f1d53787b845a1ac4e1dc02faa3d9f/FLAGae6bfdb00 [2024-06-27 21:26:54,847 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f9ca11a0c/54f1d53787b845a1ac4e1dc02faa3d9f [2024-06-27 21:26:54,849 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-06-27 21:26:54,850 INFO L274 PluginConnector]: Witness Parser initialized [2024-06-27 21:26:54,850 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/./goblint.2024-06-19_11-23-25.files/protection/safe025_rmo.yml/witness.yml [2024-06-27 21:26:55,023 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-06-27 21:26:55,026 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-06-27 21:26:55,027 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-06-27 21:26:55,027 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-06-27 21:26:55,031 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-06-27 21:26:55,031 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.06 09:26:54" (1/2) ... [2024-06-27 21:26:55,032 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4e3ce8a7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 09:26:55, skipping insertion in model container [2024-06-27 21:26:55,032 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.06 09:26:54" (1/2) ... [2024-06-27 21:26:55,033 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@3fda93a6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 09:26:55, skipping insertion in model container [2024-06-27 21:26:55,033 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 27.06 09:26:55" (2/2) ... [2024-06-27 21:26:55,034 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4e3ce8a7 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 09:26:55, skipping insertion in model container [2024-06-27 21:26:55,034 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 27.06 09:26:55" (2/2) ... [2024-06-27 21:26:55,034 INFO L83 nessWitnessExtractor]: Extracting all invariants from correctness witness [2024-06-27 21:26:55,147 INFO L95 edCorrectnessWitness]: Found the following entries in the witness: [2024-06-27 21:26:55,148 INFO L97 edCorrectnessWitness]: Location invariant before [L859-L859] ((((((((((((((((((((((((((((((((((((! multithreaded || __unbuffered_p2_EAX$r_buff1_thd1 == (_Bool)0) && (! multithreaded || x$read_delayed == (_Bool)0)) && (! multithreaded || x$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || x$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || ((x$mem_tmp == 0 || x$mem_tmp == 1) || x$mem_tmp == 2))) && (! multithreaded || x$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || x$read_delayed_var == 0)) && (! multithreaded || __unbuffered_p2_EAX$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || ((x == 0 || x == 1) || x == 2))) && (! multithreaded || __unbuffered_p2_EAX$mem_tmp == 0)) && (! multithreaded || x$flush_delayed == (_Bool)0)) && (! multithreaded || x$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$w_buff1 == 0)) && (! multithreaded || (__unbuffered_p2_EBX == 0 || __unbuffered_p2_EBX == 1))) && (! multithreaded || x$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || x$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$w_buff0_used == (_Bool)0)) && (! multithreaded || x$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$w_buff1_used == (_Bool)0)) && (! multithreaded || (y == 0 || y == 1))) && (! multithreaded || ((__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1) || __unbuffered_p2_EAX == 2))) && (! multithreaded || x$w_buff0_used == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$w_buff0 == 0)) && (! multithreaded || x$w_buff1_used == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || ((__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1) || __unbuffered_p0_EAX == 2))) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || x$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$flush_delayed == (_Bool)0)) && (! multithreaded || (__unbuffered_p2_EAX$read_delayed_var == 0 || (__unbuffered_p2_EAX$read_delayed_var == & x && ((*__unbuffered_p2_EAX$read_delayed_var == 0 || *__unbuffered_p2_EAX$read_delayed_var == 1) || *__unbuffered_p2_EAX$read_delayed_var == 2))))) && (! multithreaded || x$w_buff1 == 0)) && (! multithreaded || __unbuffered_p2_EAX$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || x$w_buff0 == 0) [2024-06-27 21:26:55,149 INFO L97 edCorrectnessWitness]: Location invariant before [L857-L857] ((((((((((((((((((((((((((((((((((((! multithreaded || __unbuffered_p2_EAX$r_buff1_thd1 == (_Bool)0) && (! multithreaded || x$read_delayed == (_Bool)0)) && (! multithreaded || x$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || x$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || ((x$mem_tmp == 0 || x$mem_tmp == 1) || x$mem_tmp == 2))) && (! multithreaded || x$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || x$read_delayed_var == 0)) && (! multithreaded || __unbuffered_p2_EAX$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || ((x == 0 || x == 1) || x == 2))) && (! multithreaded || __unbuffered_p2_EAX$mem_tmp == 0)) && (! multithreaded || x$flush_delayed == (_Bool)0)) && (! multithreaded || x$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$w_buff1 == 0)) && (! multithreaded || (__unbuffered_p2_EBX == 0 || __unbuffered_p2_EBX == 1))) && (! multithreaded || x$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || x$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$w_buff0_used == (_Bool)0)) && (! multithreaded || x$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$w_buff1_used == (_Bool)0)) && (! multithreaded || (y == 0 || y == 1))) && (! multithreaded || ((__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1) || __unbuffered_p2_EAX == 2))) && (! multithreaded || x$w_buff0_used == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$w_buff0 == 0)) && (! multithreaded || x$w_buff1_used == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || ((__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1) || __unbuffered_p0_EAX == 2))) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || x$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$flush_delayed == (_Bool)0)) && (! multithreaded || (__unbuffered_p2_EAX$read_delayed_var == 0 || (__unbuffered_p2_EAX$read_delayed_var == & x && ((*__unbuffered_p2_EAX$read_delayed_var == 0 || *__unbuffered_p2_EAX$read_delayed_var == 1) || *__unbuffered_p2_EAX$read_delayed_var == 2))))) && (! multithreaded || x$w_buff1 == 0)) && (! multithreaded || __unbuffered_p2_EAX$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || x$w_buff0 == 0) [2024-06-27 21:26:55,149 INFO L97 edCorrectnessWitness]: Location invariant before [L860-L860] ((((((((((((((((((((((((((((((((((((! multithreaded || __unbuffered_p2_EAX$r_buff1_thd1 == (_Bool)0) && (! multithreaded || x$read_delayed == (_Bool)0)) && (! multithreaded || x$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || x$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || ((x$mem_tmp == 0 || x$mem_tmp == 1) || x$mem_tmp == 2))) && (! multithreaded || x$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || x$read_delayed_var == 0)) && (! multithreaded || __unbuffered_p2_EAX$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || ((x == 0 || x == 1) || x == 2))) && (! multithreaded || __unbuffered_p2_EAX$mem_tmp == 0)) && (! multithreaded || x$flush_delayed == (_Bool)0)) && (! multithreaded || x$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$w_buff1 == 0)) && (! multithreaded || (__unbuffered_p2_EBX == 0 || __unbuffered_p2_EBX == 1))) && (! multithreaded || x$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || x$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$w_buff0_used == (_Bool)0)) && (! multithreaded || x$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$w_buff1_used == (_Bool)0)) && (! multithreaded || (y == 0 || y == 1))) && (! multithreaded || ((__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1) || __unbuffered_p2_EAX == 2))) && (! multithreaded || x$w_buff0_used == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$w_buff0 == 0)) && (! multithreaded || x$w_buff1_used == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || ((__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1) || __unbuffered_p0_EAX == 2))) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || x$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$flush_delayed == (_Bool)0)) && (! multithreaded || (__unbuffered_p2_EAX$read_delayed_var == 0 || (__unbuffered_p2_EAX$read_delayed_var == & x && ((*__unbuffered_p2_EAX$read_delayed_var == 0 || *__unbuffered_p2_EAX$read_delayed_var == 1) || *__unbuffered_p2_EAX$read_delayed_var == 2))))) && (! multithreaded || x$w_buff1 == 0)) && (! multithreaded || __unbuffered_p2_EAX$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || x$w_buff0 == 0) [2024-06-27 21:26:55,149 INFO L103 edCorrectnessWitness]: ghost_variable multithreaded = 0 [2024-06-27 21:26:55,149 INFO L106 edCorrectnessWitness]: ghost_update [L855-L855] multithreaded = 1; [2024-06-27 21:26:55,245 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-06-27 21:26:55,483 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-27 21:26:55,490 INFO L202 MainTranslator]: Completed pre-run Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local [2024-06-27 21:26:55,581 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-27 21:26:55,607 INFO L206 MainTranslator]: Completed translation [2024-06-27 21:26:55,607 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 09:26:55 WrapperNode [2024-06-27 21:26:55,608 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-06-27 21:26:55,608 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-06-27 21:26:55,609 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-06-27 21:26:55,609 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-06-27 21:26:55,614 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 09:26:55" (1/1) ... [2024-06-27 21:26:55,628 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 09:26:55" (1/1) ... [2024-06-27 21:26:55,656 INFO L138 Inliner]: procedures = 175, calls = 91, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 225 [2024-06-27 21:26:55,657 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-06-27 21:26:55,657 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-06-27 21:26:55,657 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-06-27 21:26:55,658 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-06-27 21:26:55,665 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 09:26:55" (1/1) ... [2024-06-27 21:26:55,666 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 09:26:55" (1/1) ... [2024-06-27 21:26:55,670 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 09:26:55" (1/1) ... [2024-06-27 21:26:55,691 INFO L175 MemorySlicer]: Split 48 memory accesses to 2 slices as follows [2, 46]. 96 percent of accesses are in the largest equivalence class. The 3 initializations are split as follows [2, 1]. The 11 writes are split as follows [0, 11]. [2024-06-27 21:26:55,691 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 09:26:55" (1/1) ... [2024-06-27 21:26:55,692 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 09:26:55" (1/1) ... [2024-06-27 21:26:55,701 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 09:26:55" (1/1) ... [2024-06-27 21:26:55,703 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 09:26:55" (1/1) ... [2024-06-27 21:26:55,705 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 09:26:55" (1/1) ... [2024-06-27 21:26:55,706 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 09:26:55" (1/1) ... [2024-06-27 21:26:55,710 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-06-27 21:26:55,711 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-06-27 21:26:55,711 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-06-27 21:26:55,711 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-06-27 21:26:55,711 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 09:26:55" (1/1) ... [2024-06-27 21:26:55,716 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-27 21:26:55,721 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 21:26:55,745 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) [2024-06-27 21:26:55,765 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 [2024-06-27 21:26:55,777 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-06-27 21:26:55,778 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-06-27 21:26:55,778 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-06-27 21:26:55,778 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-06-27 21:26:55,778 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-06-27 21:26:55,778 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-06-27 21:26:55,779 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2024-06-27 21:26:55,779 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2024-06-27 21:26:55,779 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2024-06-27 21:26:55,779 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2024-06-27 21:26:55,779 INFO L130 BoogieDeclarations]: Found specification of procedure P2 [2024-06-27 21:26:55,779 INFO L138 BoogieDeclarations]: Found implementation of procedure P2 [2024-06-27 21:26:55,780 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-06-27 21:26:55,780 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-06-27 21:26:55,780 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-06-27 21:26:55,781 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-06-27 21:26:55,782 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-06-27 21:26:55,783 WARN L214 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2024-06-27 21:26:55,948 INFO L244 CfgBuilder]: Building ICFG [2024-06-27 21:26:55,950 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-06-27 21:26:56,406 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-06-27 21:26:56,406 INFO L293 CfgBuilder]: Performing block encoding [2024-06-27 21:26:56,791 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-06-27 21:26:56,792 INFO L320 CfgBuilder]: Removed 0 assume(true) statements. [2024-06-27 21:26:56,793 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.06 09:26:56 BoogieIcfgContainer [2024-06-27 21:26:56,793 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-06-27 21:26:56,795 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-06-27 21:26:56,795 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-06-27 21:26:56,797 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-06-27 21:26:56,799 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.06 09:26:54" (1/4) ... [2024-06-27 21:26:56,799 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@10294293 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.06 09:26:56, skipping insertion in model container [2024-06-27 21:26:56,800 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 27.06 09:26:55" (2/4) ... [2024-06-27 21:26:56,812 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@10294293 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 27.06 09:26:56, skipping insertion in model container [2024-06-27 21:26:56,812 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 09:26:55" (3/4) ... [2024-06-27 21:26:56,812 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@10294293 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 27.06 09:26:56, skipping insertion in model container [2024-06-27 21:26:56,812 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.06 09:26:56" (4/4) ... [2024-06-27 21:26:56,814 INFO L112 eAbstractionObserver]: Analyzing ICFG safe025_rmo.i [2024-06-27 21:26:56,828 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-06-27 21:26:56,833 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 3 error locations. [2024-06-27 21:26:56,834 INFO L522 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-06-27 21:26:56,955 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-06-27 21:26:57,004 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 53 places, 43 transitions, 98 flow [2024-06-27 21:26:57,076 INFO L124 PetriNetUnfolderBase]: 0/40 cut-off events. [2024-06-27 21:26:57,077 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-27 21:26:57,078 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50 conditions, 40 events. 0/40 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 55 event pairs, 0 based on Foata normal form. 0/37 useless extension candidates. Maximal degree in co-relation 0. Up to 1 conditions per place. [2024-06-27 21:26:57,078 INFO L82 GeneralOperation]: Start removeDead. Operand has 53 places, 43 transitions, 98 flow [2024-06-27 21:26:57,081 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 44 places, 34 transitions, 77 flow [2024-06-27 21:26:57,092 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-06-27 21:26:57,098 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;@5768737b, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-06-27 21:26:57,099 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2024-06-27 21:26:57,104 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-06-27 21:26:57,104 INFO L124 PetriNetUnfolderBase]: 0/6 cut-off events. [2024-06-27 21:26:57,104 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-27 21:26:57,104 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:26:57,105 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2024-06-27 21:26:57,105 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:26:57,111 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:26:57,112 INFO L85 PathProgramCache]: Analyzing trace with hash 805342282, now seen corresponding path program 1 times [2024-06-27 21:26:57,119 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:26:57,119 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [908487152] [2024-06-27 21:26:57,119 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:26:57,120 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:26:57,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:26:58,620 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:26:58,621 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:26:58,621 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [908487152] [2024-06-27 21:26:58,622 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [908487152] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:26:58,622 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:26:58,622 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-06-27 21:26:58,624 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1900625334] [2024-06-27 21:26:58,624 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:26:58,630 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-06-27 21:26:58,635 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:26:58,660 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-06-27 21:26:58,661 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-06-27 21:26:58,678 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-27 21:26:58,680 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 34 transitions, 77 flow. Second operand has 3 states, 3 states have (on average 11.333333333333334) internal successors, (34), 3 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:26:58,680 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:26:58,680 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-27 21:26:58,681 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:26:59,194 INFO L124 PetriNetUnfolderBase]: 1205/1912 cut-off events. [2024-06-27 21:26:59,194 INFO L125 PetriNetUnfolderBase]: For 34/34 co-relation queries the response was YES. [2024-06-27 21:26:59,200 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3817 conditions, 1912 events. 1205/1912 cut-off events. For 34/34 co-relation queries the response was YES. Maximal size of possible extension queue 88. Compared 9498 event pairs, 800 based on Foata normal form. 1/1879 useless extension candidates. Maximal degree in co-relation 3805. Up to 1818 conditions per place. [2024-06-27 21:26:59,209 INFO L140 encePairwiseOnDemand]: 36/43 looper letters, 35 selfloop transitions, 4 changer transitions 0/46 dead transitions. [2024-06-27 21:26:59,209 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 46 transitions, 185 flow [2024-06-27 21:26:59,210 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-06-27 21:26:59,212 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-06-27 21:26:59,217 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 72 transitions. [2024-06-27 21:26:59,219 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5581395348837209 [2024-06-27 21:26:59,220 INFO L175 Difference]: Start difference. First operand has 44 places, 34 transitions, 77 flow. Second operand 3 states and 72 transitions. [2024-06-27 21:26:59,221 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 46 transitions, 185 flow [2024-06-27 21:26:59,222 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 43 places, 46 transitions, 180 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-06-27 21:26:59,224 INFO L231 Difference]: Finished difference. Result has 44 places, 37 transitions, 104 flow [2024-06-27 21:26:59,226 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=74, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=34, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=104, PETRI_PLACES=44, PETRI_TRANSITIONS=37} [2024-06-27 21:26:59,228 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 0 predicate places. [2024-06-27 21:26:59,228 INFO L495 AbstractCegarLoop]: Abstraction has has 44 places, 37 transitions, 104 flow [2024-06-27 21:26:59,228 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 11.333333333333334) internal successors, (34), 3 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:26:59,228 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:26:59,228 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:26:59,229 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-06-27 21:26:59,229 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:26:59,229 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:26:59,229 INFO L85 PathProgramCache]: Analyzing trace with hash 839969089, now seen corresponding path program 1 times [2024-06-27 21:26:59,230 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:26:59,230 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1609952592] [2024-06-27 21:26:59,230 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:26:59,230 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:26:59,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:27:00,510 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:27:00,510 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:27:00,510 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1609952592] [2024-06-27 21:27:00,511 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1609952592] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:27:00,511 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:27:00,511 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-06-27 21:27:00,511 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1646811663] [2024-06-27 21:27:00,511 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:27:00,513 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-27 21:27:00,513 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:27:00,513 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-27 21:27:00,514 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-06-27 21:27:00,528 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-27 21:27:00,528 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 37 transitions, 104 flow. Second operand has 4 states, 4 states have (on average 10.25) internal successors, (41), 4 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:27:00,529 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:27:00,529 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-27 21:27:00,529 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:27:00,996 INFO L124 PetriNetUnfolderBase]: 1400/2131 cut-off events. [2024-06-27 21:27:00,996 INFO L125 PetriNetUnfolderBase]: For 399/399 co-relation queries the response was YES. [2024-06-27 21:27:00,999 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4875 conditions, 2131 events. 1400/2131 cut-off events. For 399/399 co-relation queries the response was YES. Maximal size of possible extension queue 99. Compared 10183 event pairs, 654 based on Foata normal form. 6/2137 useless extension candidates. Maximal degree in co-relation 4863. Up to 2059 conditions per place. [2024-06-27 21:27:01,005 INFO L140 encePairwiseOnDemand]: 35/43 looper letters, 46 selfloop transitions, 7 changer transitions 0/59 dead transitions. [2024-06-27 21:27:01,005 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 47 places, 59 transitions, 266 flow [2024-06-27 21:27:01,006 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-27 21:27:01,006 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-27 21:27:01,007 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 92 transitions. [2024-06-27 21:27:01,007 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5348837209302325 [2024-06-27 21:27:01,007 INFO L175 Difference]: Start difference. First operand has 44 places, 37 transitions, 104 flow. Second operand 4 states and 92 transitions. [2024-06-27 21:27:01,007 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 47 places, 59 transitions, 266 flow [2024-06-27 21:27:01,008 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 46 places, 59 transitions, 262 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-06-27 21:27:01,009 INFO L231 Difference]: Finished difference. Result has 47 places, 40 transitions, 140 flow [2024-06-27 21:27:01,009 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=100, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=140, PETRI_PLACES=47, PETRI_TRANSITIONS=40} [2024-06-27 21:27:01,010 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 3 predicate places. [2024-06-27 21:27:01,010 INFO L495 AbstractCegarLoop]: Abstraction has has 47 places, 40 transitions, 140 flow [2024-06-27 21:27:01,010 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 10.25) internal successors, (41), 4 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:27:01,010 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:27:01,010 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:27:01,010 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-06-27 21:27:01,011 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:27:01,011 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:27:01,011 INFO L85 PathProgramCache]: Analyzing trace with hash -2095493569, now seen corresponding path program 1 times [2024-06-27 21:27:01,011 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:27:01,011 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1198468298] [2024-06-27 21:27:01,011 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:27:01,012 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:27:01,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:27:03,387 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:27:03,387 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:27:03,388 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1198468298] [2024-06-27 21:27:03,388 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1198468298] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:27:03,388 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:27:03,388 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 21:27:03,388 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [440396510] [2024-06-27 21:27:03,388 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:27:03,389 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 21:27:03,389 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:27:03,389 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 21:27:03,389 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-06-27 21:27:03,416 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-27 21:27:03,417 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 47 places, 40 transitions, 140 flow. Second operand has 6 states, 6 states have (on average 10.166666666666666) internal successors, (61), 6 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:27:03,417 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:27:03,417 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-27 21:27:03,417 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:27:04,084 INFO L124 PetriNetUnfolderBase]: 1391/2116 cut-off events. [2024-06-27 21:27:04,085 INFO L125 PetriNetUnfolderBase]: For 1120/1120 co-relation queries the response was YES. [2024-06-27 21:27:04,087 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5383 conditions, 2116 events. 1391/2116 cut-off events. For 1120/1120 co-relation queries the response was YES. Maximal size of possible extension queue 99. Compared 10072 event pairs, 485 based on Foata normal form. 6/2122 useless extension candidates. Maximal degree in co-relation 5369. Up to 2006 conditions per place. [2024-06-27 21:27:04,095 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 59 selfloop transitions, 12 changer transitions 0/77 dead transitions. [2024-06-27 21:27:04,095 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 51 places, 77 transitions, 384 flow [2024-06-27 21:27:04,097 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 21:27:04,097 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 21:27:04,098 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 128 transitions. [2024-06-27 21:27:04,098 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49612403100775193 [2024-06-27 21:27:04,099 INFO L175 Difference]: Start difference. First operand has 47 places, 40 transitions, 140 flow. Second operand 6 states and 128 transitions. [2024-06-27 21:27:04,099 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 51 places, 77 transitions, 384 flow [2024-06-27 21:27:04,100 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 49 places, 77 transitions, 364 flow, removed 4 selfloop flow, removed 2 redundant places. [2024-06-27 21:27:04,101 INFO L231 Difference]: Finished difference. Result has 51 places, 44 transitions, 183 flow [2024-06-27 21:27:04,101 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=120, PETRI_DIFFERENCE_MINUEND_PLACES=44, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=39, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=183, PETRI_PLACES=51, PETRI_TRANSITIONS=44} [2024-06-27 21:27:04,102 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 7 predicate places. [2024-06-27 21:27:04,102 INFO L495 AbstractCegarLoop]: Abstraction has has 51 places, 44 transitions, 183 flow [2024-06-27 21:27:04,102 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 10.166666666666666) internal successors, (61), 6 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:27:04,102 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:27:04,102 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:27:04,102 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-06-27 21:27:04,103 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:27:04,103 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:27:04,103 INFO L85 PathProgramCache]: Analyzing trace with hash 975656872, now seen corresponding path program 1 times [2024-06-27 21:27:04,103 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:27:04,103 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [426671456] [2024-06-27 21:27:04,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:27:04,104 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:27:04,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:27:05,429 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:27:05,429 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:27:05,429 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [426671456] [2024-06-27 21:27:05,429 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [426671456] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:27:05,430 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:27:05,430 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 21:27:05,430 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1127179074] [2024-06-27 21:27:05,430 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:27:05,430 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 21:27:05,430 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:27:05,431 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 21:27:05,431 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-06-27 21:27:05,452 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-27 21:27:05,452 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 44 transitions, 183 flow. Second operand has 6 states, 6 states have (on average 10.666666666666666) internal successors, (64), 6 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:27:05,452 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:27:05,452 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-27 21:27:05,452 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:27:06,232 INFO L124 PetriNetUnfolderBase]: 1179/1896 cut-off events. [2024-06-27 21:27:06,233 INFO L125 PetriNetUnfolderBase]: For 1832/1832 co-relation queries the response was YES. [2024-06-27 21:27:06,235 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5196 conditions, 1896 events. 1179/1896 cut-off events. For 1832/1832 co-relation queries the response was YES. Maximal size of possible extension queue 90. Compared 9434 event pairs, 473 based on Foata normal form. 2/1898 useless extension candidates. Maximal degree in co-relation 5179. Up to 1739 conditions per place. [2024-06-27 21:27:06,241 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 50 selfloop transitions, 11 changer transitions 0/67 dead transitions. [2024-06-27 21:27:06,242 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 55 places, 67 transitions, 385 flow [2024-06-27 21:27:06,242 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 21:27:06,242 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 21:27:06,243 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 98 transitions. [2024-06-27 21:27:06,243 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4558139534883721 [2024-06-27 21:27:06,243 INFO L175 Difference]: Start difference. First operand has 51 places, 44 transitions, 183 flow. Second operand 5 states and 98 transitions. [2024-06-27 21:27:06,243 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 55 places, 67 transitions, 385 flow [2024-06-27 21:27:06,246 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 52 places, 67 transitions, 358 flow, removed 4 selfloop flow, removed 3 redundant places. [2024-06-27 21:27:06,247 INFO L231 Difference]: Finished difference. Result has 54 places, 50 transitions, 230 flow [2024-06-27 21:27:06,247 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=156, PETRI_DIFFERENCE_MINUEND_PLACES=48, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=44, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=230, PETRI_PLACES=54, PETRI_TRANSITIONS=50} [2024-06-27 21:27:06,248 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 10 predicate places. [2024-06-27 21:27:06,249 INFO L495 AbstractCegarLoop]: Abstraction has has 54 places, 50 transitions, 230 flow [2024-06-27 21:27:06,249 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 10.666666666666666) internal successors, (64), 6 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:27:06,249 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:27:06,249 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:27:06,249 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-06-27 21:27:06,249 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:27:06,250 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:27:06,250 INFO L85 PathProgramCache]: Analyzing trace with hash 181695742, now seen corresponding path program 1 times [2024-06-27 21:27:06,250 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:27:06,250 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [251072262] [2024-06-27 21:27:06,250 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:27:06,250 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:27:06,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:27:07,647 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:27:07,648 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:27:07,648 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [251072262] [2024-06-27 21:27:07,648 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [251072262] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:27:07,648 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:27:07,648 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 21:27:07,648 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1043986261] [2024-06-27 21:27:07,648 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:27:07,648 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 21:27:07,649 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:27:07,649 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 21:27:07,649 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-06-27 21:27:07,665 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-27 21:27:07,665 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 54 places, 50 transitions, 230 flow. Second operand has 6 states, 6 states have (on average 10.833333333333334) internal successors, (65), 6 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:27:07,665 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:27:07,665 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-27 21:27:07,665 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:27:08,540 INFO L124 PetriNetUnfolderBase]: 1169/1881 cut-off events. [2024-06-27 21:27:08,541 INFO L125 PetriNetUnfolderBase]: For 2845/2847 co-relation queries the response was YES. [2024-06-27 21:27:08,544 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5676 conditions, 1881 events. 1169/1881 cut-off events. For 2845/2847 co-relation queries the response was YES. Maximal size of possible extension queue 90. Compared 9336 event pairs, 467 based on Foata normal form. 6/1887 useless extension candidates. Maximal degree in co-relation 5656. Up to 1731 conditions per place. [2024-06-27 21:27:08,551 INFO L140 encePairwiseOnDemand]: 35/43 looper letters, 49 selfloop transitions, 10 changer transitions 0/65 dead transitions. [2024-06-27 21:27:08,551 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 58 places, 65 transitions, 384 flow [2024-06-27 21:27:08,552 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 21:27:08,552 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 21:27:08,555 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 96 transitions. [2024-06-27 21:27:08,555 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44651162790697674 [2024-06-27 21:27:08,556 INFO L175 Difference]: Start difference. First operand has 54 places, 50 transitions, 230 flow. Second operand 5 states and 96 transitions. [2024-06-27 21:27:08,556 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 58 places, 65 transitions, 384 flow [2024-06-27 21:27:08,560 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 57 places, 65 transitions, 370 flow, removed 6 selfloop flow, removed 1 redundant places. [2024-06-27 21:27:08,564 INFO L231 Difference]: Finished difference. Result has 58 places, 50 transitions, 244 flow [2024-06-27 21:27:08,564 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=216, PETRI_DIFFERENCE_MINUEND_PLACES=53, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=50, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=244, PETRI_PLACES=58, PETRI_TRANSITIONS=50} [2024-06-27 21:27:08,565 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 14 predicate places. [2024-06-27 21:27:08,565 INFO L495 AbstractCegarLoop]: Abstraction has has 58 places, 50 transitions, 244 flow [2024-06-27 21:27:08,565 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 10.833333333333334) internal successors, (65), 6 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:27:08,566 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:27:08,566 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:27:08,566 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-06-27 21:27:08,566 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:27:08,566 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:27:08,567 INFO L85 PathProgramCache]: Analyzing trace with hash 299361071, now seen corresponding path program 1 times [2024-06-27 21:27:08,567 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:27:08,567 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [851014151] [2024-06-27 21:27:08,567 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:27:08,567 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:27:08,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:27:10,259 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:27:10,259 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:27:10,259 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [851014151] [2024-06-27 21:27:10,259 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [851014151] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:27:10,259 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:27:10,260 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 21:27:10,260 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [934953280] [2024-06-27 21:27:10,260 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:27:10,260 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 21:27:10,260 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:27:10,260 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 21:27:10,261 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-27 21:27:10,272 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-27 21:27:10,273 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 58 places, 50 transitions, 244 flow. Second operand has 7 states, 7 states have (on average 9.571428571428571) internal successors, (67), 7 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:27:10,273 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:27:10,273 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-27 21:27:10,273 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:27:11,426 INFO L124 PetriNetUnfolderBase]: 1389/2123 cut-off events. [2024-06-27 21:27:11,426 INFO L125 PetriNetUnfolderBase]: For 4413/4415 co-relation queries the response was YES. [2024-06-27 21:27:11,430 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6770 conditions, 2123 events. 1389/2123 cut-off events. For 4413/4415 co-relation queries the response was YES. Maximal size of possible extension queue 98. Compared 10125 event pairs, 523 based on Foata normal form. 4/2127 useless extension candidates. Maximal degree in co-relation 6747. Up to 1956 conditions per place. [2024-06-27 21:27:11,439 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 61 selfloop transitions, 18 changer transitions 0/84 dead transitions. [2024-06-27 21:27:11,439 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 63 places, 84 transitions, 526 flow [2024-06-27 21:27:11,440 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 21:27:11,440 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 21:27:11,441 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 118 transitions. [2024-06-27 21:27:11,441 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4573643410852713 [2024-06-27 21:27:11,441 INFO L175 Difference]: Start difference. First operand has 58 places, 50 transitions, 244 flow. Second operand 6 states and 118 transitions. [2024-06-27 21:27:11,442 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 63 places, 84 transitions, 526 flow [2024-06-27 21:27:11,445 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 61 places, 84 transitions, 512 flow, removed 2 selfloop flow, removed 2 redundant places. [2024-06-27 21:27:11,447 INFO L231 Difference]: Finished difference. Result has 63 places, 56 transitions, 328 flow [2024-06-27 21:27:11,447 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=230, PETRI_DIFFERENCE_MINUEND_PLACES=56, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=50, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=328, PETRI_PLACES=63, PETRI_TRANSITIONS=56} [2024-06-27 21:27:11,450 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 19 predicate places. [2024-06-27 21:27:11,451 INFO L495 AbstractCegarLoop]: Abstraction has has 63 places, 56 transitions, 328 flow [2024-06-27 21:27:11,451 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 9.571428571428571) internal successors, (67), 7 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:27:11,451 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:27:11,451 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:27:11,451 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-06-27 21:27:11,451 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:27:11,452 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:27:11,452 INFO L85 PathProgramCache]: Analyzing trace with hash 1336498001, now seen corresponding path program 2 times [2024-06-27 21:27:11,452 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:27:11,454 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [935087330] [2024-06-27 21:27:11,455 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:27:11,455 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:27:11,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:27:13,063 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:27:13,063 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:27:13,063 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [935087330] [2024-06-27 21:27:13,063 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [935087330] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:27:13,064 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:27:13,064 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 21:27:13,064 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [544643748] [2024-06-27 21:27:13,064 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:27:13,065 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 21:27:13,065 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:27:13,065 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 21:27:13,065 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-27 21:27:13,073 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-27 21:27:13,073 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 56 transitions, 328 flow. Second operand has 7 states, 7 states have (on average 9.571428571428571) internal successors, (67), 7 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:27:13,073 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:27:13,073 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-27 21:27:13,073 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:27:14,041 INFO L124 PetriNetUnfolderBase]: 1384/2110 cut-off events. [2024-06-27 21:27:14,041 INFO L125 PetriNetUnfolderBase]: For 6481/6483 co-relation queries the response was YES. [2024-06-27 21:27:14,049 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7418 conditions, 2110 events. 1384/2110 cut-off events. For 6481/6483 co-relation queries the response was YES. Maximal size of possible extension queue 98. Compared 10127 event pairs, 537 based on Foata normal form. 4/2113 useless extension candidates. Maximal degree in co-relation 7392. Up to 1953 conditions per place. [2024-06-27 21:27:14,061 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 55 selfloop transitions, 21 changer transitions 0/81 dead transitions. [2024-06-27 21:27:14,061 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 68 places, 81 transitions, 582 flow [2024-06-27 21:27:14,062 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 21:27:14,062 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 21:27:14,063 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 112 transitions. [2024-06-27 21:27:14,063 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43410852713178294 [2024-06-27 21:27:14,063 INFO L175 Difference]: Start difference. First operand has 63 places, 56 transitions, 328 flow. Second operand 6 states and 112 transitions. [2024-06-27 21:27:14,063 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 68 places, 81 transitions, 582 flow [2024-06-27 21:27:14,068 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 66 places, 81 transitions, 552 flow, removed 10 selfloop flow, removed 2 redundant places. [2024-06-27 21:27:14,070 INFO L231 Difference]: Finished difference. Result has 67 places, 59 transitions, 376 flow [2024-06-27 21:27:14,070 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=300, PETRI_DIFFERENCE_MINUEND_PLACES=61, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=56, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=376, PETRI_PLACES=67, PETRI_TRANSITIONS=59} [2024-06-27 21:27:14,071 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 23 predicate places. [2024-06-27 21:27:14,071 INFO L495 AbstractCegarLoop]: Abstraction has has 67 places, 59 transitions, 376 flow [2024-06-27 21:27:14,071 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 9.571428571428571) internal successors, (67), 7 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:27:14,071 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:27:14,071 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:27:14,071 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-06-27 21:27:14,071 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:27:14,072 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:27:14,072 INFO L85 PathProgramCache]: Analyzing trace with hash -1656754499, now seen corresponding path program 1 times [2024-06-27 21:27:14,072 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:27:14,072 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1004948323] [2024-06-27 21:27:14,072 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:27:14,072 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:27:14,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:27:15,333 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:27:15,333 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:27:15,333 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1004948323] [2024-06-27 21:27:15,333 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1004948323] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:27:15,333 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:27:15,333 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 21:27:15,333 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1392517687] [2024-06-27 21:27:15,333 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:27:15,334 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 21:27:15,334 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:27:15,334 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 21:27:15,334 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-27 21:27:15,345 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-27 21:27:15,346 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 67 places, 59 transitions, 376 flow. Second operand has 7 states, 7 states have (on average 9.714285714285714) internal successors, (68), 7 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:27:15,346 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:27:15,346 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-27 21:27:15,346 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:27:16,341 INFO L124 PetriNetUnfolderBase]: 1471/2249 cut-off events. [2024-06-27 21:27:16,341 INFO L125 PetriNetUnfolderBase]: For 8405/8409 co-relation queries the response was YES. [2024-06-27 21:27:16,345 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8340 conditions, 2249 events. 1471/2249 cut-off events. For 8405/8409 co-relation queries the response was YES. Maximal size of possible extension queue 98. Compared 10805 event pairs, 524 based on Foata normal form. 8/2257 useless extension candidates. Maximal degree in co-relation 8312. Up to 2020 conditions per place. [2024-06-27 21:27:16,353 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 72 selfloop transitions, 34 changer transitions 0/111 dead transitions. [2024-06-27 21:27:16,353 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 73 places, 111 transitions, 862 flow [2024-06-27 21:27:16,355 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 21:27:16,355 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 21:27:16,356 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 141 transitions. [2024-06-27 21:27:16,356 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4684385382059801 [2024-06-27 21:27:16,356 INFO L175 Difference]: Start difference. First operand has 67 places, 59 transitions, 376 flow. Second operand 7 states and 141 transitions. [2024-06-27 21:27:16,356 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 73 places, 111 transitions, 862 flow [2024-06-27 21:27:16,361 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 70 places, 111 transitions, 798 flow, removed 12 selfloop flow, removed 3 redundant places. [2024-06-27 21:27:16,362 INFO L231 Difference]: Finished difference. Result has 73 places, 75 transitions, 562 flow [2024-06-27 21:27:16,362 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=340, PETRI_DIFFERENCE_MINUEND_PLACES=64, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=59, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=562, PETRI_PLACES=73, PETRI_TRANSITIONS=75} [2024-06-27 21:27:16,363 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 29 predicate places. [2024-06-27 21:27:16,363 INFO L495 AbstractCegarLoop]: Abstraction has has 73 places, 75 transitions, 562 flow [2024-06-27 21:27:16,363 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 9.714285714285714) internal successors, (68), 7 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:27:16,363 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:27:16,363 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:27:16,364 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-06-27 21:27:16,364 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:27:16,364 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:27:16,364 INFO L85 PathProgramCache]: Analyzing trace with hash -1747229887, now seen corresponding path program 2 times [2024-06-27 21:27:16,364 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:27:16,364 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1645339856] [2024-06-27 21:27:16,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:27:16,365 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:27:16,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:27:17,894 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:27:17,894 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:27:17,894 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1645339856] [2024-06-27 21:27:17,894 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1645339856] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:27:17,894 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:27:17,894 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 21:27:17,895 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1466124496] [2024-06-27 21:27:17,895 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:27:17,895 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 21:27:17,895 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:27:17,896 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 21:27:17,897 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-27 21:27:17,916 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-27 21:27:17,917 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 73 places, 75 transitions, 562 flow. Second operand has 7 states, 7 states have (on average 9.714285714285714) internal successors, (68), 7 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:27:17,917 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:27:17,917 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-27 21:27:17,917 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:27:18,947 INFO L124 PetriNetUnfolderBase]: 1515/2327 cut-off events. [2024-06-27 21:27:18,947 INFO L125 PetriNetUnfolderBase]: For 10885/10891 co-relation queries the response was YES. [2024-06-27 21:27:18,952 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9059 conditions, 2327 events. 1515/2327 cut-off events. For 10885/10891 co-relation queries the response was YES. Maximal size of possible extension queue 98. Compared 11249 event pairs, 531 based on Foata normal form. 12/2339 useless extension candidates. Maximal degree in co-relation 9027. Up to 2058 conditions per place. [2024-06-27 21:27:18,962 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 64 selfloop transitions, 40 changer transitions 0/109 dead transitions. [2024-06-27 21:27:18,962 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 78 places, 109 transitions, 950 flow [2024-06-27 21:27:18,963 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 21:27:18,963 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 21:27:18,964 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 119 transitions. [2024-06-27 21:27:18,964 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46124031007751937 [2024-06-27 21:27:18,964 INFO L175 Difference]: Start difference. First operand has 73 places, 75 transitions, 562 flow. Second operand 6 states and 119 transitions. [2024-06-27 21:27:18,965 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 78 places, 109 transitions, 950 flow [2024-06-27 21:27:18,974 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 75 places, 109 transitions, 900 flow, removed 4 selfloop flow, removed 3 redundant places. [2024-06-27 21:27:18,977 INFO L231 Difference]: Finished difference. Result has 76 places, 81 transitions, 679 flow [2024-06-27 21:27:18,977 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=518, PETRI_DIFFERENCE_MINUEND_PLACES=70, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=75, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=679, PETRI_PLACES=76, PETRI_TRANSITIONS=81} [2024-06-27 21:27:18,978 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 32 predicate places. [2024-06-27 21:27:18,978 INFO L495 AbstractCegarLoop]: Abstraction has has 76 places, 81 transitions, 679 flow [2024-06-27 21:27:18,979 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 9.714285714285714) internal successors, (68), 7 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:27:18,979 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:27:18,979 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:27:18,979 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-06-27 21:27:18,979 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:27:18,979 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:27:18,979 INFO L85 PathProgramCache]: Analyzing trace with hash -1518225757, now seen corresponding path program 3 times [2024-06-27 21:27:18,980 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:27:18,984 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1091530115] [2024-06-27 21:27:18,984 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:27:18,985 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:27:18,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:27:20,427 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:27:20,427 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:27:20,427 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1091530115] [2024-06-27 21:27:20,427 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1091530115] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:27:20,427 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:27:20,428 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 21:27:20,428 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1157907460] [2024-06-27 21:27:20,428 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:27:20,428 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 21:27:20,428 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:27:20,429 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 21:27:20,429 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-27 21:27:20,445 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-27 21:27:20,446 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 76 places, 81 transitions, 679 flow. Second operand has 7 states, 7 states have (on average 9.714285714285714) internal successors, (68), 7 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:27:20,446 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:27:20,446 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-27 21:27:20,446 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:27:21,550 INFO L124 PetriNetUnfolderBase]: 1499/2297 cut-off events. [2024-06-27 21:27:21,551 INFO L125 PetriNetUnfolderBase]: For 12907/12919 co-relation queries the response was YES. [2024-06-27 21:27:21,556 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9164 conditions, 2297 events. 1499/2297 cut-off events. For 12907/12919 co-relation queries the response was YES. Maximal size of possible extension queue 98. Compared 11062 event pairs, 536 based on Foata normal form. 18/2314 useless extension candidates. Maximal degree in co-relation 9131. Up to 2045 conditions per place. [2024-06-27 21:27:21,564 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 59 selfloop transitions, 39 changer transitions 0/103 dead transitions. [2024-06-27 21:27:21,564 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 81 places, 103 transitions, 941 flow [2024-06-27 21:27:21,565 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 21:27:21,565 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 21:27:21,565 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 111 transitions. [2024-06-27 21:27:21,566 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43023255813953487 [2024-06-27 21:27:21,566 INFO L175 Difference]: Start difference. First operand has 76 places, 81 transitions, 679 flow. Second operand 6 states and 111 transitions. [2024-06-27 21:27:21,566 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 81 places, 103 transitions, 941 flow [2024-06-27 21:27:21,573 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 77 places, 103 transitions, 866 flow, removed 14 selfloop flow, removed 4 redundant places. [2024-06-27 21:27:21,577 INFO L231 Difference]: Finished difference. Result has 78 places, 81 transitions, 693 flow [2024-06-27 21:27:21,578 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=604, PETRI_DIFFERENCE_MINUEND_PLACES=72, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=81, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=693, PETRI_PLACES=78, PETRI_TRANSITIONS=81} [2024-06-27 21:27:21,579 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 34 predicate places. [2024-06-27 21:27:21,579 INFO L495 AbstractCegarLoop]: Abstraction has has 78 places, 81 transitions, 693 flow [2024-06-27 21:27:21,579 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 9.714285714285714) internal successors, (68), 7 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:27:21,579 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:27:21,580 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:27:21,580 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-06-27 21:27:21,580 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:27:21,580 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:27:21,580 INFO L85 PathProgramCache]: Analyzing trace with hash -1517956367, now seen corresponding path program 1 times [2024-06-27 21:27:21,581 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:27:21,581 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1372466600] [2024-06-27 21:27:21,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:27:21,581 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:27:21,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:27:24,053 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:27:24,053 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:27:24,053 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1372466600] [2024-06-27 21:27:24,053 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1372466600] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:27:24,053 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:27:24,054 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 21:27:24,054 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [751325309] [2024-06-27 21:27:24,054 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:27:24,055 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 21:27:24,055 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:27:24,057 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 21:27:24,057 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-27 21:27:24,082 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-27 21:27:24,082 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 78 places, 81 transitions, 693 flow. Second operand has 8 states, 8 states have (on average 10.625) internal successors, (85), 8 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:27:24,082 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:27:24,082 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-27 21:27:24,083 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:27:24,992 INFO L124 PetriNetUnfolderBase]: 1284/2073 cut-off events. [2024-06-27 21:27:24,992 INFO L125 PetriNetUnfolderBase]: For 11226/11228 co-relation queries the response was YES. [2024-06-27 21:27:24,997 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8111 conditions, 2073 events. 1284/2073 cut-off events. For 11226/11228 co-relation queries the response was YES. Maximal size of possible extension queue 89. Compared 10343 event pairs, 435 based on Foata normal form. 6/2079 useless extension candidates. Maximal degree in co-relation 8078. Up to 1878 conditions per place. [2024-06-27 21:27:25,003 INFO L140 encePairwiseOnDemand]: 35/43 looper letters, 86 selfloop transitions, 12 changer transitions 0/104 dead transitions. [2024-06-27 21:27:25,004 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 83 places, 104 transitions, 965 flow [2024-06-27 21:27:25,004 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 21:27:25,005 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 21:27:25,005 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 113 transitions. [2024-06-27 21:27:25,005 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.437984496124031 [2024-06-27 21:27:25,005 INFO L175 Difference]: Start difference. First operand has 78 places, 81 transitions, 693 flow. Second operand 6 states and 113 transitions. [2024-06-27 21:27:25,005 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 83 places, 104 transitions, 965 flow [2024-06-27 21:27:25,013 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 75 places, 104 transitions, 796 flow, removed 4 selfloop flow, removed 8 redundant places. [2024-06-27 21:27:25,015 INFO L231 Difference]: Finished difference. Result has 76 places, 83 transitions, 577 flow [2024-06-27 21:27:25,015 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=524, PETRI_DIFFERENCE_MINUEND_PLACES=70, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=81, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=69, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=577, PETRI_PLACES=76, PETRI_TRANSITIONS=83} [2024-06-27 21:27:25,016 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 32 predicate places. [2024-06-27 21:27:25,016 INFO L495 AbstractCegarLoop]: Abstraction has has 76 places, 83 transitions, 577 flow [2024-06-27 21:27:25,016 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.625) internal successors, (85), 8 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:27:25,016 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:27:25,016 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:27:25,016 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-06-27 21:27:25,016 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:27:25,017 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:27:25,017 INFO L85 PathProgramCache]: Analyzing trace with hash 131315518, now seen corresponding path program 1 times [2024-06-27 21:27:25,017 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:27:25,017 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1973379168] [2024-06-27 21:27:25,017 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:27:25,017 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:27:25,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:27:27,507 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:27:27,508 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:27:27,508 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1973379168] [2024-06-27 21:27:27,508 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1973379168] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:27:27,508 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:27:27,508 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 21:27:27,509 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [354848219] [2024-06-27 21:27:27,509 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:27:27,509 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 21:27:27,509 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:27:27,510 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 21:27:27,510 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-27 21:27:27,572 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-27 21:27:27,572 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 76 places, 83 transitions, 577 flow. Second operand has 8 states, 8 states have (on average 9.5) internal successors, (76), 8 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:27:27,572 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:27:27,572 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-27 21:27:27,573 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:27:28,717 INFO L124 PetriNetUnfolderBase]: 1540/2366 cut-off events. [2024-06-27 21:27:28,717 INFO L125 PetriNetUnfolderBase]: For 13307/13307 co-relation queries the response was YES. [2024-06-27 21:27:28,721 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9441 conditions, 2366 events. 1540/2366 cut-off events. For 13307/13307 co-relation queries the response was YES. Maximal size of possible extension queue 98. Compared 11441 event pairs, 521 based on Foata normal form. 2/2368 useless extension candidates. Maximal degree in co-relation 9409. Up to 2209 conditions per place. [2024-06-27 21:27:28,728 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 105 selfloop transitions, 19 changer transitions 0/129 dead transitions. [2024-06-27 21:27:28,728 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 83 places, 129 transitions, 1029 flow [2024-06-27 21:27:28,729 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 21:27:28,729 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 21:27:28,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 149 transitions. [2024-06-27 21:27:28,729 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4331395348837209 [2024-06-27 21:27:28,730 INFO L175 Difference]: Start difference. First operand has 76 places, 83 transitions, 577 flow. Second operand 8 states and 149 transitions. [2024-06-27 21:27:28,730 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 83 places, 129 transitions, 1029 flow [2024-06-27 21:27:28,737 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 79 places, 129 transitions, 994 flow, removed 7 selfloop flow, removed 4 redundant places. [2024-06-27 21:27:28,738 INFO L231 Difference]: Finished difference. Result has 81 places, 89 transitions, 650 flow [2024-06-27 21:27:28,739 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=542, PETRI_DIFFERENCE_MINUEND_PLACES=72, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=83, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=66, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=650, PETRI_PLACES=81, PETRI_TRANSITIONS=89} [2024-06-27 21:27:28,739 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 37 predicate places. [2024-06-27 21:27:28,739 INFO L495 AbstractCegarLoop]: Abstraction has has 81 places, 89 transitions, 650 flow [2024-06-27 21:27:28,739 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.5) internal successors, (76), 8 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:27:28,739 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:27:28,740 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:27:28,740 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-06-27 21:27:28,740 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:27:28,740 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:27:28,740 INFO L85 PathProgramCache]: Analyzing trace with hash 131435488, now seen corresponding path program 2 times [2024-06-27 21:27:28,740 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:27:28,741 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1917447849] [2024-06-27 21:27:28,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:27:28,741 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:27:28,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:27:30,681 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:27:30,681 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:27:30,682 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1917447849] [2024-06-27 21:27:30,682 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1917447849] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:27:30,682 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:27:30,682 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 21:27:30,682 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [865684000] [2024-06-27 21:27:30,682 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:27:30,683 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 21:27:30,683 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:27:30,683 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 21:27:30,683 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-27 21:27:30,695 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-27 21:27:30,695 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 81 places, 89 transitions, 650 flow. Second operand has 8 states, 8 states have (on average 9.5) internal successors, (76), 8 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:27:30,695 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:27:30,696 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-27 21:27:30,696 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:27:31,918 INFO L124 PetriNetUnfolderBase]: 1553/2396 cut-off events. [2024-06-27 21:27:31,918 INFO L125 PetriNetUnfolderBase]: For 16561/16565 co-relation queries the response was YES. [2024-06-27 21:27:31,923 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10168 conditions, 2396 events. 1553/2396 cut-off events. For 16561/16565 co-relation queries the response was YES. Maximal size of possible extension queue 98. Compared 11714 event pairs, 479 based on Foata normal form. 6/2402 useless extension candidates. Maximal degree in co-relation 10134. Up to 1935 conditions per place. [2024-06-27 21:27:31,963 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 79 selfloop transitions, 45 changer transitions 0/129 dead transitions. [2024-06-27 21:27:31,964 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 87 places, 129 transitions, 1108 flow [2024-06-27 21:27:31,964 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 21:27:31,965 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 21:27:31,965 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 136 transitions. [2024-06-27 21:27:31,965 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45182724252491696 [2024-06-27 21:27:31,965 INFO L175 Difference]: Start difference. First operand has 81 places, 89 transitions, 650 flow. Second operand 7 states and 136 transitions. [2024-06-27 21:27:31,965 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 87 places, 129 transitions, 1108 flow [2024-06-27 21:27:31,977 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 81 places, 129 transitions, 1049 flow, removed 14 selfloop flow, removed 6 redundant places. [2024-06-27 21:27:31,981 INFO L231 Difference]: Finished difference. Result has 83 places, 95 transitions, 791 flow [2024-06-27 21:27:31,982 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=591, PETRI_DIFFERENCE_MINUEND_PLACES=75, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=89, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=791, PETRI_PLACES=83, PETRI_TRANSITIONS=95} [2024-06-27 21:27:31,982 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 39 predicate places. [2024-06-27 21:27:31,982 INFO L495 AbstractCegarLoop]: Abstraction has has 83 places, 95 transitions, 791 flow [2024-06-27 21:27:31,983 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.5) internal successors, (76), 8 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:27:31,983 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:27:31,983 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:27:31,983 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-06-27 21:27:31,983 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:27:31,983 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:27:31,984 INFO L85 PathProgramCache]: Analyzing trace with hash 982869238, now seen corresponding path program 3 times [2024-06-27 21:27:31,984 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:27:31,984 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [360072149] [2024-06-27 21:27:31,984 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:27:31,984 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:27:31,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:27:34,095 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:27:34,095 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:27:34,095 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [360072149] [2024-06-27 21:27:34,095 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [360072149] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:27:34,096 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:27:34,096 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 21:27:34,096 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1187758180] [2024-06-27 21:27:34,096 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:27:34,096 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 21:27:34,096 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:27:34,097 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 21:27:34,097 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-27 21:27:34,109 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-27 21:27:34,109 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 83 places, 95 transitions, 791 flow. Second operand has 8 states, 8 states have (on average 9.5) internal successors, (76), 8 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:27:34,109 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:27:34,109 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-27 21:27:34,110 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:27:35,260 INFO L124 PetriNetUnfolderBase]: 1548/2376 cut-off events. [2024-06-27 21:27:35,260 INFO L125 PetriNetUnfolderBase]: For 20211/20215 co-relation queries the response was YES. [2024-06-27 21:27:35,264 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10941 conditions, 2376 events. 1548/2376 cut-off events. For 20211/20215 co-relation queries the response was YES. Maximal size of possible extension queue 98. Compared 11596 event pairs, 536 based on Foata normal form. 6/2380 useless extension candidates. Maximal degree in co-relation 10906. Up to 1932 conditions per place. [2024-06-27 21:27:35,271 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 71 selfloop transitions, 50 changer transitions 0/126 dead transitions. [2024-06-27 21:27:35,271 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 89 places, 126 transitions, 1203 flow [2024-06-27 21:27:35,272 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 21:27:35,272 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 21:27:35,272 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 130 transitions. [2024-06-27 21:27:35,273 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4318936877076412 [2024-06-27 21:27:35,273 INFO L175 Difference]: Start difference. First operand has 83 places, 95 transitions, 791 flow. Second operand 7 states and 130 transitions. [2024-06-27 21:27:35,273 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 89 places, 126 transitions, 1203 flow [2024-06-27 21:27:35,283 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 86 places, 126 transitions, 1142 flow, removed 20 selfloop flow, removed 3 redundant places. [2024-06-27 21:27:35,284 INFO L231 Difference]: Finished difference. Result has 87 places, 98 transitions, 881 flow [2024-06-27 21:27:35,285 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=732, PETRI_DIFFERENCE_MINUEND_PLACES=80, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=95, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=47, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=881, PETRI_PLACES=87, PETRI_TRANSITIONS=98} [2024-06-27 21:27:35,285 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 43 predicate places. [2024-06-27 21:27:35,286 INFO L495 AbstractCegarLoop]: Abstraction has has 87 places, 98 transitions, 881 flow [2024-06-27 21:27:35,286 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.5) internal successors, (76), 8 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:27:35,286 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:27:35,286 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:27:35,286 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-06-27 21:27:35,286 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:27:35,287 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:27:35,287 INFO L85 PathProgramCache]: Analyzing trace with hash -1778545972, now seen corresponding path program 1 times [2024-06-27 21:27:35,287 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:27:35,287 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1030429513] [2024-06-27 21:27:35,287 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:27:35,287 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:27:35,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:27:36,838 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:27:36,838 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:27:36,838 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1030429513] [2024-06-27 21:27:36,838 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1030429513] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:27:36,838 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:27:36,838 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 21:27:36,838 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1109205209] [2024-06-27 21:27:36,838 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:27:36,839 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 21:27:36,839 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:27:36,839 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 21:27:36,839 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-27 21:27:36,856 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-27 21:27:36,857 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 87 places, 98 transitions, 881 flow. Second operand has 6 states, 6 states have (on average 11.333333333333334) internal successors, (68), 6 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:27:36,857 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:27:36,857 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-27 21:27:36,857 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:27:37,497 INFO L124 PetriNetUnfolderBase]: 1335/2164 cut-off events. [2024-06-27 21:27:37,497 INFO L125 PetriNetUnfolderBase]: For 18398/18398 co-relation queries the response was YES. [2024-06-27 21:27:37,503 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9856 conditions, 2164 events. 1335/2164 cut-off events. For 18398/18398 co-relation queries the response was YES. Maximal size of possible extension queue 89. Compared 10977 event pairs, 443 based on Foata normal form. 2/2166 useless extension candidates. Maximal degree in co-relation 9819. Up to 2002 conditions per place. [2024-06-27 21:27:37,510 INFO L140 encePairwiseOnDemand]: 36/43 looper letters, 98 selfloop transitions, 8 changer transitions 0/112 dead transitions. [2024-06-27 21:27:37,510 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 91 places, 112 transitions, 1141 flow [2024-06-27 21:27:37,511 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 21:27:37,511 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 21:27:37,511 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 90 transitions. [2024-06-27 21:27:37,511 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4186046511627907 [2024-06-27 21:27:37,511 INFO L175 Difference]: Start difference. First operand has 87 places, 98 transitions, 881 flow. Second operand 5 states and 90 transitions. [2024-06-27 21:27:37,511 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 91 places, 112 transitions, 1141 flow [2024-06-27 21:27:37,521 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 87 places, 112 transitions, 1055 flow, removed 13 selfloop flow, removed 4 redundant places. [2024-06-27 21:27:37,522 INFO L231 Difference]: Finished difference. Result has 88 places, 101 transitions, 841 flow [2024-06-27 21:27:37,522 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=795, PETRI_DIFFERENCE_MINUEND_PLACES=83, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=98, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=90, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=841, PETRI_PLACES=88, PETRI_TRANSITIONS=101} [2024-06-27 21:27:37,523 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 44 predicate places. [2024-06-27 21:27:37,523 INFO L495 AbstractCegarLoop]: Abstraction has has 88 places, 101 transitions, 841 flow [2024-06-27 21:27:37,523 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 11.333333333333334) internal successors, (68), 6 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:27:37,523 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:27:37,523 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:27:37,523 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-06-27 21:27:37,523 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:27:37,524 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:27:37,524 INFO L85 PathProgramCache]: Analyzing trace with hash 1767455638, now seen corresponding path program 1 times [2024-06-27 21:27:37,524 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:27:37,524 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1040791669] [2024-06-27 21:27:37,524 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:27:37,524 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:27:37,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:27:39,600 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:27:39,601 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:27:39,601 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1040791669] [2024-06-27 21:27:39,601 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1040791669] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:27:39,601 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:27:39,601 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 21:27:39,601 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [570380162] [2024-06-27 21:27:39,601 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:27:39,601 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 21:27:39,601 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:27:39,602 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 21:27:39,602 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-27 21:27:39,614 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-27 21:27:39,614 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 88 places, 101 transitions, 841 flow. Second operand has 8 states, 8 states have (on average 9.625) internal successors, (77), 8 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:27:39,614 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:27:39,614 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-27 21:27:39,614 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:27:40,719 INFO L124 PetriNetUnfolderBase]: 1529/2364 cut-off events. [2024-06-27 21:27:40,719 INFO L125 PetriNetUnfolderBase]: For 23366/23366 co-relation queries the response was YES. [2024-06-27 21:27:40,725 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11076 conditions, 2364 events. 1529/2364 cut-off events. For 23366/23366 co-relation queries the response was YES. Maximal size of possible extension queue 98. Compared 11586 event pairs, 520 based on Foata normal form. 4/2368 useless extension candidates. Maximal degree in co-relation 11037. Up to 2201 conditions per place. [2024-06-27 21:27:40,732 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 115 selfloop transitions, 19 changer transitions 0/139 dead transitions. [2024-06-27 21:27:40,733 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 95 places, 139 transitions, 1219 flow [2024-06-27 21:27:40,733 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 21:27:40,734 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 21:27:40,734 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 147 transitions. [2024-06-27 21:27:40,734 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4273255813953488 [2024-06-27 21:27:40,734 INFO L175 Difference]: Start difference. First operand has 88 places, 101 transitions, 841 flow. Second operand 8 states and 147 transitions. [2024-06-27 21:27:40,734 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 95 places, 139 transitions, 1219 flow [2024-06-27 21:27:40,747 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 92 places, 139 transitions, 1185 flow, removed 11 selfloop flow, removed 3 redundant places. [2024-06-27 21:27:40,748 INFO L231 Difference]: Finished difference. Result has 93 places, 101 transitions, 853 flow [2024-06-27 21:27:40,748 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=807, PETRI_DIFFERENCE_MINUEND_PLACES=85, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=101, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=82, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=853, PETRI_PLACES=93, PETRI_TRANSITIONS=101} [2024-06-27 21:27:40,749 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 49 predicate places. [2024-06-27 21:27:40,749 INFO L495 AbstractCegarLoop]: Abstraction has has 93 places, 101 transitions, 853 flow [2024-06-27 21:27:40,749 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.625) internal successors, (77), 8 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:27:40,749 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:27:40,749 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:27:40,750 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-06-27 21:27:40,750 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:27:40,750 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:27:40,750 INFO L85 PathProgramCache]: Analyzing trace with hash 1915272628, now seen corresponding path program 2 times [2024-06-27 21:27:40,750 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:27:40,750 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1151750423] [2024-06-27 21:27:40,750 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:27:40,751 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:27:40,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:27:42,734 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:27:42,734 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:27:42,734 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1151750423] [2024-06-27 21:27:42,734 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1151750423] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:27:42,735 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:27:42,735 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 21:27:42,735 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1657310544] [2024-06-27 21:27:42,735 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:27:42,735 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 21:27:42,735 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:27:42,736 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 21:27:42,736 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-27 21:27:42,755 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-27 21:27:42,755 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 93 places, 101 transitions, 853 flow. Second operand has 8 states, 8 states have (on average 9.625) internal successors, (77), 8 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:27:42,755 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:27:42,755 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-27 21:27:42,755 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:27:44,050 INFO L124 PetriNetUnfolderBase]: 1591/2476 cut-off events. [2024-06-27 21:27:44,050 INFO L125 PetriNetUnfolderBase]: For 26930/26938 co-relation queries the response was YES. [2024-06-27 21:27:44,056 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11810 conditions, 2476 events. 1591/2476 cut-off events. For 26930/26938 co-relation queries the response was YES. Maximal size of possible extension queue 99. Compared 12314 event pairs, 472 based on Foata normal form. 12/2488 useless extension candidates. Maximal degree in co-relation 11770. Up to 1964 conditions per place. [2024-06-27 21:27:44,064 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 84 selfloop transitions, 55 changer transitions 0/144 dead transitions. [2024-06-27 21:27:44,065 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 99 places, 144 transitions, 1425 flow [2024-06-27 21:27:44,065 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 21:27:44,065 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 21:27:44,066 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 140 transitions. [2024-06-27 21:27:44,066 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46511627906976744 [2024-06-27 21:27:44,066 INFO L175 Difference]: Start difference. First operand has 93 places, 101 transitions, 853 flow. Second operand 7 states and 140 transitions. [2024-06-27 21:27:44,066 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 99 places, 144 transitions, 1425 flow [2024-06-27 21:27:44,079 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 92 places, 144 transitions, 1387 flow, removed 0 selfloop flow, removed 7 redundant places. [2024-06-27 21:27:44,081 INFO L231 Difference]: Finished difference. Result has 93 places, 107 transitions, 1011 flow [2024-06-27 21:27:44,081 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=815, PETRI_DIFFERENCE_MINUEND_PLACES=86, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=101, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=49, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=52, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1011, PETRI_PLACES=93, PETRI_TRANSITIONS=107} [2024-06-27 21:27:44,081 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 49 predicate places. [2024-06-27 21:27:44,081 INFO L495 AbstractCegarLoop]: Abstraction has has 93 places, 107 transitions, 1011 flow [2024-06-27 21:27:44,082 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.625) internal successors, (77), 8 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:27:44,082 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:27:44,082 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:27:44,082 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-06-27 21:27:44,082 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:27:44,090 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:27:44,090 INFO L85 PathProgramCache]: Analyzing trace with hash 1771174708, now seen corresponding path program 3 times [2024-06-27 21:27:44,090 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:27:44,090 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1315081129] [2024-06-27 21:27:44,090 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:27:44,090 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:27:44,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:27:46,328 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:27:46,328 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:27:46,328 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1315081129] [2024-06-27 21:27:46,328 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1315081129] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:27:46,328 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:27:46,329 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:27:46,329 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1393369813] [2024-06-27 21:27:46,329 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:27:46,329 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:27:46,329 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:27:46,330 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:27:46,330 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:27:46,357 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-27 21:27:46,357 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 93 places, 107 transitions, 1011 flow. Second operand has 9 states, 9 states have (on average 9.444444444444445) internal successors, (85), 9 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:27:46,358 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:27:46,358 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-27 21:27:46,358 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:27:47,697 INFO L124 PetriNetUnfolderBase]: 1617/2509 cut-off events. [2024-06-27 21:27:47,697 INFO L125 PetriNetUnfolderBase]: For 30952/30956 co-relation queries the response was YES. [2024-06-27 21:27:47,704 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12425 conditions, 2509 events. 1617/2509 cut-off events. For 30952/30956 co-relation queries the response was YES. Maximal size of possible extension queue 98. Compared 12434 event pairs, 481 based on Foata normal form. 8/2517 useless extension candidates. Maximal degree in co-relation 12384. Up to 1986 conditions per place. [2024-06-27 21:27:47,711 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 88 selfloop transitions, 56 changer transitions 0/149 dead transitions. [2024-06-27 21:27:47,712 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 100 places, 149 transitions, 1515 flow [2024-06-27 21:27:47,712 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 21:27:47,713 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 21:27:47,713 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 153 transitions. [2024-06-27 21:27:47,713 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44476744186046513 [2024-06-27 21:27:47,714 INFO L175 Difference]: Start difference. First operand has 93 places, 107 transitions, 1011 flow. Second operand 8 states and 153 transitions. [2024-06-27 21:27:47,714 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 100 places, 149 transitions, 1515 flow [2024-06-27 21:27:47,733 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 97 places, 149 transitions, 1439 flow, removed 11 selfloop flow, removed 3 redundant places. [2024-06-27 21:27:47,734 INFO L231 Difference]: Finished difference. Result has 98 places, 110 transitions, 1099 flow [2024-06-27 21:27:47,735 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=938, PETRI_DIFFERENCE_MINUEND_PLACES=90, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=107, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=53, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=54, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1099, PETRI_PLACES=98, PETRI_TRANSITIONS=110} [2024-06-27 21:27:47,735 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 54 predicate places. [2024-06-27 21:27:47,735 INFO L495 AbstractCegarLoop]: Abstraction has has 98 places, 110 transitions, 1099 flow [2024-06-27 21:27:47,735 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.444444444444445) internal successors, (85), 9 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:27:47,735 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:27:47,735 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:27:47,736 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2024-06-27 21:27:47,736 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:27:47,736 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:27:47,736 INFO L85 PathProgramCache]: Analyzing trace with hash 1016246666, now seen corresponding path program 1 times [2024-06-27 21:27:47,736 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:27:47,736 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1350943196] [2024-06-27 21:27:47,736 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:27:47,737 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:27:47,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:27:50,151 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:27:50,151 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:27:50,151 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1350943196] [2024-06-27 21:27:50,151 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1350943196] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:27:50,151 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:27:50,152 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:27:50,152 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1538721284] [2024-06-27 21:27:50,152 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:27:50,153 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:27:50,154 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:27:50,154 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:27:50,154 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:27:50,194 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-27 21:27:50,194 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 98 places, 110 transitions, 1099 flow. Second operand has 9 states, 9 states have (on average 9.555555555555555) internal successors, (86), 9 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:27:50,194 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:27:50,194 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-27 21:27:50,194 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:27:51,248 INFO L124 PetriNetUnfolderBase]: 1637/2546 cut-off events. [2024-06-27 21:27:51,248 INFO L125 PetriNetUnfolderBase]: For 34889/34897 co-relation queries the response was YES. [2024-06-27 21:27:51,256 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12760 conditions, 2546 events. 1637/2546 cut-off events. For 34889/34897 co-relation queries the response was YES. Maximal size of possible extension queue 100. Compared 12727 event pairs, 483 based on Foata normal form. 12/2558 useless extension candidates. Maximal degree in co-relation 12718. Up to 2218 conditions per place. [2024-06-27 21:27:51,264 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 97 selfloop transitions, 42 changer transitions 0/144 dead transitions. [2024-06-27 21:27:51,265 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 104 places, 144 transitions, 1487 flow [2024-06-27 21:27:51,265 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 21:27:51,265 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 21:27:51,267 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 133 transitions. [2024-06-27 21:27:51,267 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4418604651162791 [2024-06-27 21:27:51,267 INFO L175 Difference]: Start difference. First operand has 98 places, 110 transitions, 1099 flow. Second operand 7 states and 133 transitions. [2024-06-27 21:27:51,267 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 104 places, 144 transitions, 1487 flow [2024-06-27 21:27:51,289 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 98 places, 144 transitions, 1355 flow, removed 10 selfloop flow, removed 6 redundant places. [2024-06-27 21:27:51,290 INFO L231 Difference]: Finished difference. Result has 99 places, 112 transitions, 1084 flow [2024-06-27 21:27:51,290 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=967, PETRI_DIFFERENCE_MINUEND_PLACES=92, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=110, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=68, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1084, PETRI_PLACES=99, PETRI_TRANSITIONS=112} [2024-06-27 21:27:51,291 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 55 predicate places. [2024-06-27 21:27:51,291 INFO L495 AbstractCegarLoop]: Abstraction has has 99 places, 112 transitions, 1084 flow [2024-06-27 21:27:51,291 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.555555555555555) internal successors, (86), 9 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:27:51,291 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:27:51,291 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:27:51,292 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2024-06-27 21:27:51,292 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:27:51,292 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:27:51,292 INFO L85 PathProgramCache]: Analyzing trace with hash 1266619444, now seen corresponding path program 4 times [2024-06-27 21:27:51,292 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:27:51,292 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [433896609] [2024-06-27 21:27:51,292 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:27:51,293 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:27:51,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:27:53,704 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:27:53,705 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:27:53,705 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [433896609] [2024-06-27 21:27:53,705 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [433896609] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:27:53,705 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:27:53,705 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:27:53,705 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [87536452] [2024-06-27 21:27:53,705 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:27:53,705 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:27:53,705 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:27:53,705 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:27:53,706 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:27:53,718 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-27 21:27:53,718 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 99 places, 112 transitions, 1084 flow. Second operand has 9 states, 9 states have (on average 9.444444444444445) internal successors, (85), 9 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:27:53,718 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:27:53,718 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-27 21:27:53,718 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:27:55,109 INFO L124 PetriNetUnfolderBase]: 1627/2508 cut-off events. [2024-06-27 21:27:55,109 INFO L125 PetriNetUnfolderBase]: For 37451/37455 co-relation queries the response was YES. [2024-06-27 21:27:55,117 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12800 conditions, 2508 events. 1627/2508 cut-off events. For 37451/37455 co-relation queries the response was YES. Maximal size of possible extension queue 100. Compared 12399 event pairs, 562 based on Foata normal form. 8/2514 useless extension candidates. Maximal degree in co-relation 12757. Up to 2010 conditions per place. [2024-06-27 21:27:55,125 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 82 selfloop transitions, 59 changer transitions 0/146 dead transitions. [2024-06-27 21:27:55,125 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 106 places, 146 transitions, 1534 flow [2024-06-27 21:27:55,126 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 21:27:55,126 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 21:27:55,126 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 147 transitions. [2024-06-27 21:27:55,127 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4273255813953488 [2024-06-27 21:27:55,127 INFO L175 Difference]: Start difference. First operand has 99 places, 112 transitions, 1084 flow. Second operand 8 states and 147 transitions. [2024-06-27 21:27:55,127 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 106 places, 146 transitions, 1534 flow [2024-06-27 21:27:55,147 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 101 places, 146 transitions, 1429 flow, removed 13 selfloop flow, removed 5 redundant places. [2024-06-27 21:27:55,149 INFO L231 Difference]: Finished difference. Result has 102 places, 112 transitions, 1105 flow [2024-06-27 21:27:55,149 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=979, PETRI_DIFFERENCE_MINUEND_PLACES=94, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=112, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=59, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1105, PETRI_PLACES=102, PETRI_TRANSITIONS=112} [2024-06-27 21:27:55,150 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 58 predicate places. [2024-06-27 21:27:55,150 INFO L495 AbstractCegarLoop]: Abstraction has has 102 places, 112 transitions, 1105 flow [2024-06-27 21:27:55,150 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.444444444444445) internal successors, (85), 9 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:27:55,150 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:27:55,150 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:27:55,150 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2024-06-27 21:27:55,150 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:27:55,151 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:27:55,151 INFO L85 PathProgramCache]: Analyzing trace with hash -199178884, now seen corresponding path program 5 times [2024-06-27 21:27:55,151 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:27:55,151 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1130232502] [2024-06-27 21:27:55,151 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:27:55,151 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:27:55,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:27:56,968 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:27:56,968 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:27:56,968 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1130232502] [2024-06-27 21:27:56,968 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1130232502] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:27:56,968 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:27:56,969 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 21:27:56,969 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1014027585] [2024-06-27 21:27:56,969 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:27:56,969 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 21:27:56,969 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:27:56,970 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 21:27:56,970 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-27 21:27:56,980 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-27 21:27:56,980 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 102 places, 112 transitions, 1105 flow. Second operand has 8 states, 8 states have (on average 9.625) internal successors, (77), 8 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:27:56,980 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:27:56,981 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-27 21:27:56,981 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:27:58,251 INFO L124 PetriNetUnfolderBase]: 1617/2499 cut-off events. [2024-06-27 21:27:58,251 INFO L125 PetriNetUnfolderBase]: For 40100/40108 co-relation queries the response was YES. [2024-06-27 21:27:58,258 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12889 conditions, 2499 events. 1617/2499 cut-off events. For 40100/40108 co-relation queries the response was YES. Maximal size of possible extension queue 100. Compared 12435 event pairs, 503 based on Foata normal form. 12/2509 useless extension candidates. Maximal degree in co-relation 12845. Up to 2002 conditions per place. [2024-06-27 21:27:58,267 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 79 selfloop transitions, 56 changer transitions 0/140 dead transitions. [2024-06-27 21:27:58,267 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 108 places, 140 transitions, 1457 flow [2024-06-27 21:27:58,268 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 21:27:58,268 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 21:27:58,269 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 130 transitions. [2024-06-27 21:27:58,269 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4318936877076412 [2024-06-27 21:27:58,269 INFO L175 Difference]: Start difference. First operand has 102 places, 112 transitions, 1105 flow. Second operand 7 states and 130 transitions. [2024-06-27 21:27:58,269 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 108 places, 140 transitions, 1457 flow [2024-06-27 21:27:58,292 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 100 places, 140 transitions, 1294 flow, removed 8 selfloop flow, removed 8 redundant places. [2024-06-27 21:27:58,294 INFO L231 Difference]: Finished difference. Result has 101 places, 112 transitions, 1063 flow [2024-06-27 21:27:58,294 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=942, PETRI_DIFFERENCE_MINUEND_PLACES=94, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=112, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=56, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=56, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1063, PETRI_PLACES=101, PETRI_TRANSITIONS=112} [2024-06-27 21:27:58,295 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 57 predicate places. [2024-06-27 21:27:58,295 INFO L495 AbstractCegarLoop]: Abstraction has has 101 places, 112 transitions, 1063 flow [2024-06-27 21:27:58,295 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.625) internal successors, (77), 8 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:27:58,295 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:27:58,295 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:27:58,295 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2024-06-27 21:27:58,296 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:27:58,296 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:27:58,296 INFO L85 PathProgramCache]: Analyzing trace with hash 1532532050, now seen corresponding path program 2 times [2024-06-27 21:27:58,296 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:27:58,296 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [895914879] [2024-06-27 21:27:58,296 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:27:58,296 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:27:58,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:28:00,633 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:28:00,634 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:28:00,634 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [895914879] [2024-06-27 21:28:00,634 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [895914879] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:28:00,634 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:28:00,634 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:28:00,634 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1156890911] [2024-06-27 21:28:00,635 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:28:00,635 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:28:00,635 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:28:00,635 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:28:00,635 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:28:00,647 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-27 21:28:00,648 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 101 places, 112 transitions, 1063 flow. Second operand has 9 states, 9 states have (on average 9.555555555555555) internal successors, (86), 9 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:28:00,648 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:28:00,648 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-27 21:28:00,648 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:28:01,882 INFO L124 PetriNetUnfolderBase]: 1637/2548 cut-off events. [2024-06-27 21:28:01,883 INFO L125 PetriNetUnfolderBase]: For 42872/42880 co-relation queries the response was YES. [2024-06-27 21:28:01,889 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13115 conditions, 2548 events. 1637/2548 cut-off events. For 42872/42880 co-relation queries the response was YES. Maximal size of possible extension queue 104. Compared 12754 event pairs, 494 based on Foata normal form. 12/2559 useless extension candidates. Maximal degree in co-relation 13071. Up to 2228 conditions per place. [2024-06-27 21:28:01,896 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 96 selfloop transitions, 41 changer transitions 0/142 dead transitions. [2024-06-27 21:28:01,896 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 107 places, 142 transitions, 1443 flow [2024-06-27 21:28:01,897 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 21:28:01,897 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 21:28:01,898 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 127 transitions. [2024-06-27 21:28:01,898 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4219269102990033 [2024-06-27 21:28:01,898 INFO L175 Difference]: Start difference. First operand has 101 places, 112 transitions, 1063 flow. Second operand 7 states and 127 transitions. [2024-06-27 21:28:01,898 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 107 places, 142 transitions, 1443 flow [2024-06-27 21:28:01,922 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 97 places, 142 transitions, 1173 flow, removed 6 selfloop flow, removed 10 redundant places. [2024-06-27 21:28:01,924 INFO L231 Difference]: Finished difference. Result has 98 places, 114 transitions, 911 flow [2024-06-27 21:28:01,924 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=793, PETRI_DIFFERENCE_MINUEND_PLACES=91, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=112, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=71, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=911, PETRI_PLACES=98, PETRI_TRANSITIONS=114} [2024-06-27 21:28:01,925 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 54 predicate places. [2024-06-27 21:28:01,925 INFO L495 AbstractCegarLoop]: Abstraction has has 98 places, 114 transitions, 911 flow [2024-06-27 21:28:01,925 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.555555555555555) internal successors, (86), 9 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:28:01,925 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:28:01,925 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:28:01,925 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2024-06-27 21:28:01,925 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:28:01,926 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:28:01,926 INFO L85 PathProgramCache]: Analyzing trace with hash 1532858480, now seen corresponding path program 3 times [2024-06-27 21:28:01,926 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:28:01,926 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1991705509] [2024-06-27 21:28:01,926 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:28:01,926 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:28:01,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:28:04,340 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:28:04,340 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:28:04,340 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1991705509] [2024-06-27 21:28:04,341 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1991705509] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:28:04,341 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:28:04,341 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:28:04,341 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [889153533] [2024-06-27 21:28:04,341 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:28:04,341 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:28:04,342 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:28:04,342 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:28:04,342 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:28:04,352 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-27 21:28:04,352 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 98 places, 114 transitions, 911 flow. Second operand has 9 states, 9 states have (on average 9.555555555555555) internal successors, (86), 9 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:28:04,352 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:28:04,352 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-27 21:28:04,352 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:28:05,281 INFO L124 PetriNetUnfolderBase]: 1629/2542 cut-off events. [2024-06-27 21:28:05,281 INFO L125 PetriNetUnfolderBase]: For 44079/44087 co-relation queries the response was YES. [2024-06-27 21:28:05,288 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12898 conditions, 2542 events. 1629/2542 cut-off events. For 44079/44087 co-relation queries the response was YES. Maximal size of possible extension queue 105. Compared 12753 event pairs, 466 based on Foata normal form. 12/2553 useless extension candidates. Maximal degree in co-relation 12856. Up to 2134 conditions per place. [2024-06-27 21:28:05,294 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 93 selfloop transitions, 46 changer transitions 0/144 dead transitions. [2024-06-27 21:28:05,295 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 104 places, 144 transitions, 1297 flow [2024-06-27 21:28:05,295 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 21:28:05,296 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 21:28:05,296 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 127 transitions. [2024-06-27 21:28:05,296 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4219269102990033 [2024-06-27 21:28:05,296 INFO L175 Difference]: Start difference. First operand has 98 places, 114 transitions, 911 flow. Second operand 7 states and 127 transitions. [2024-06-27 21:28:05,296 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 104 places, 144 transitions, 1297 flow [2024-06-27 21:28:05,323 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 99 places, 144 transitions, 1199 flow, removed 10 selfloop flow, removed 5 redundant places. [2024-06-27 21:28:05,329 INFO L231 Difference]: Finished difference. Result has 100 places, 116 transitions, 944 flow [2024-06-27 21:28:05,329 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=813, PETRI_DIFFERENCE_MINUEND_PLACES=93, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=114, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=44, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=68, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=944, PETRI_PLACES=100, PETRI_TRANSITIONS=116} [2024-06-27 21:28:05,329 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 56 predicate places. [2024-06-27 21:28:05,329 INFO L495 AbstractCegarLoop]: Abstraction has has 100 places, 116 transitions, 944 flow [2024-06-27 21:28:05,329 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.555555555555555) internal successors, (86), 9 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:28:05,330 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:28:05,330 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:28:05,330 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2024-06-27 21:28:05,330 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:28:05,344 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:28:05,344 INFO L85 PathProgramCache]: Analyzing trace with hash 1004581711, now seen corresponding path program 1 times [2024-06-27 21:28:05,344 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:28:05,344 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1632869466] [2024-06-27 21:28:05,345 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:28:05,345 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:28:05,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:28:07,858 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:28:07,858 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:28:07,858 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1632869466] [2024-06-27 21:28:07,858 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1632869466] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:28:07,858 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:28:07,858 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:28:07,858 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1678324909] [2024-06-27 21:28:07,858 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:28:07,859 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:28:07,859 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:28:07,859 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:28:07,859 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:28:07,882 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-27 21:28:07,882 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 100 places, 116 transitions, 944 flow. Second operand has 9 states, 9 states have (on average 9.444444444444445) internal successors, (85), 9 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:28:07,883 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:28:07,883 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-27 21:28:07,883 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:28:09,200 INFO L124 PetriNetUnfolderBase]: 1801/2814 cut-off events. [2024-06-27 21:28:09,201 INFO L125 PetriNetUnfolderBase]: For 56532/56532 co-relation queries the response was YES. [2024-06-27 21:28:09,209 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14944 conditions, 2814 events. 1801/2814 cut-off events. For 56532/56532 co-relation queries the response was YES. Maximal size of possible extension queue 125. Compared 14479 event pairs, 422 based on Foata normal form. 4/2818 useless extension candidates. Maximal degree in co-relation 14901. Up to 2319 conditions per place. [2024-06-27 21:28:09,217 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 143 selfloop transitions, 23 changer transitions 0/171 dead transitions. [2024-06-27 21:28:09,218 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 108 places, 171 transitions, 1582 flow [2024-06-27 21:28:09,219 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 21:28:09,219 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 21:28:09,219 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 171 transitions. [2024-06-27 21:28:09,219 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4418604651162791 [2024-06-27 21:28:09,220 INFO L175 Difference]: Start difference. First operand has 100 places, 116 transitions, 944 flow. Second operand 9 states and 171 transitions. [2024-06-27 21:28:09,220 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 108 places, 171 transitions, 1582 flow [2024-06-27 21:28:09,260 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 103 places, 171 transitions, 1469 flow, removed 12 selfloop flow, removed 5 redundant places. [2024-06-27 21:28:09,262 INFO L231 Difference]: Finished difference. Result has 104 places, 119 transitions, 946 flow [2024-06-27 21:28:09,262 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=831, PETRI_DIFFERENCE_MINUEND_PLACES=95, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=116, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=94, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=946, PETRI_PLACES=104, PETRI_TRANSITIONS=119} [2024-06-27 21:28:09,263 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 60 predicate places. [2024-06-27 21:28:09,263 INFO L495 AbstractCegarLoop]: Abstraction has has 104 places, 119 transitions, 946 flow [2024-06-27 21:28:09,263 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.444444444444445) internal successors, (85), 9 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:28:09,263 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:28:09,263 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:28:09,264 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2024-06-27 21:28:09,264 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:28:09,264 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:28:09,264 INFO L85 PathProgramCache]: Analyzing trace with hash -1043453267, now seen corresponding path program 2 times [2024-06-27 21:28:09,264 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:28:09,264 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [947540173] [2024-06-27 21:28:09,264 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:28:09,265 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:28:09,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:28:11,827 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:28:11,827 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:28:11,827 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [947540173] [2024-06-27 21:28:11,827 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [947540173] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:28:11,828 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:28:11,828 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:28:11,828 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [647741268] [2024-06-27 21:28:11,828 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:28:11,828 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:28:11,828 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:28:11,829 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:28:11,829 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:28:11,865 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-27 21:28:11,865 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 104 places, 119 transitions, 946 flow. Second operand has 9 states, 9 states have (on average 9.444444444444445) internal successors, (85), 9 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:28:11,865 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:28:11,865 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-27 21:28:11,865 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:28:13,016 INFO L124 PetriNetUnfolderBase]: 1793/2796 cut-off events. [2024-06-27 21:28:13,017 INFO L125 PetriNetUnfolderBase]: For 59785/59785 co-relation queries the response was YES. [2024-06-27 21:28:13,026 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14981 conditions, 2796 events. 1793/2796 cut-off events. For 59785/59785 co-relation queries the response was YES. Maximal size of possible extension queue 124. Compared 14389 event pairs, 536 based on Foata normal form. 4/2800 useless extension candidates. Maximal degree in co-relation 14937. Up to 2599 conditions per place. [2024-06-27 21:28:13,037 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 139 selfloop transitions, 21 changer transitions 0/165 dead transitions. [2024-06-27 21:28:13,037 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 112 places, 165 transitions, 1432 flow [2024-06-27 21:28:13,038 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 21:28:13,038 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 21:28:13,039 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 163 transitions. [2024-06-27 21:28:13,039 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42118863049095606 [2024-06-27 21:28:13,040 INFO L175 Difference]: Start difference. First operand has 104 places, 119 transitions, 946 flow. Second operand 9 states and 163 transitions. [2024-06-27 21:28:13,040 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 112 places, 165 transitions, 1432 flow [2024-06-27 21:28:13,081 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 107 places, 165 transitions, 1369 flow, removed 20 selfloop flow, removed 5 redundant places. [2024-06-27 21:28:13,083 INFO L231 Difference]: Finished difference. Result has 108 places, 121 transitions, 976 flow [2024-06-27 21:28:13,084 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=887, PETRI_DIFFERENCE_MINUEND_PLACES=99, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=119, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=98, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=976, PETRI_PLACES=108, PETRI_TRANSITIONS=121} [2024-06-27 21:28:13,084 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 64 predicate places. [2024-06-27 21:28:13,084 INFO L495 AbstractCegarLoop]: Abstraction has has 108 places, 121 transitions, 976 flow [2024-06-27 21:28:13,084 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.444444444444445) internal successors, (85), 9 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:28:13,085 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:28:13,085 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:28:13,085 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2024-06-27 21:28:13,085 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:28:13,086 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:28:13,086 INFO L85 PathProgramCache]: Analyzing trace with hash -928162097, now seen corresponding path program 3 times [2024-06-27 21:28:13,086 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:28:13,086 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [877453015] [2024-06-27 21:28:13,086 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:28:13,086 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:28:13,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:28:15,453 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:28:15,453 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:28:15,453 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [877453015] [2024-06-27 21:28:15,454 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [877453015] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:28:15,454 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:28:15,454 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:28:15,454 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [38304896] [2024-06-27 21:28:15,454 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:28:15,454 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:28:15,454 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:28:15,455 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:28:15,455 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:28:15,478 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-27 21:28:15,478 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 108 places, 121 transitions, 976 flow. Second operand has 9 states, 9 states have (on average 9.444444444444445) internal successors, (85), 9 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:28:15,478 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:28:15,478 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-27 21:28:15,478 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:28:16,825 INFO L124 PetriNetUnfolderBase]: 1813/2839 cut-off events. [2024-06-27 21:28:16,825 INFO L125 PetriNetUnfolderBase]: For 65151/65155 co-relation queries the response was YES. [2024-06-27 21:28:16,832 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15440 conditions, 2839 events. 1813/2839 cut-off events. For 65151/65155 co-relation queries the response was YES. Maximal size of possible extension queue 128. Compared 14645 event pairs, 475 based on Foata normal form. 8/2847 useless extension candidates. Maximal degree in co-relation 15394. Up to 2300 conditions per place. [2024-06-27 21:28:16,839 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 97 selfloop transitions, 58 changer transitions 0/160 dead transitions. [2024-06-27 21:28:16,840 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 115 places, 160 transitions, 1434 flow [2024-06-27 21:28:16,840 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 21:28:16,840 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 21:28:16,841 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 150 transitions. [2024-06-27 21:28:16,841 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.436046511627907 [2024-06-27 21:28:16,841 INFO L175 Difference]: Start difference. First operand has 108 places, 121 transitions, 976 flow. Second operand 8 states and 150 transitions. [2024-06-27 21:28:16,841 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 115 places, 160 transitions, 1434 flow [2024-06-27 21:28:16,871 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 108 places, 160 transitions, 1365 flow, removed 15 selfloop flow, removed 7 redundant places. [2024-06-27 21:28:16,873 INFO L231 Difference]: Finished difference. Result has 109 places, 123 transitions, 1076 flow [2024-06-27 21:28:16,873 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=907, PETRI_DIFFERENCE_MINUEND_PLACES=101, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=121, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=56, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=63, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1076, PETRI_PLACES=109, PETRI_TRANSITIONS=123} [2024-06-27 21:28:16,874 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 65 predicate places. [2024-06-27 21:28:16,874 INFO L495 AbstractCegarLoop]: Abstraction has has 109 places, 123 transitions, 1076 flow [2024-06-27 21:28:16,874 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.444444444444445) internal successors, (85), 9 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:28:16,874 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:28:16,874 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:28:16,874 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2024-06-27 21:28:16,874 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:28:16,875 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:28:16,875 INFO L85 PathProgramCache]: Analyzing trace with hash 201984523, now seen corresponding path program 1 times [2024-06-27 21:28:16,875 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:28:16,875 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2030719489] [2024-06-27 21:28:16,875 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:28:16,875 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:28:16,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:28:18,679 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:28:18,679 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:28:18,679 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2030719489] [2024-06-27 21:28:18,679 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2030719489] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:28:18,679 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:28:18,680 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 21:28:18,680 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2048069124] [2024-06-27 21:28:18,680 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:28:18,682 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 21:28:18,683 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:28:18,684 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 21:28:18,684 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-27 21:28:18,699 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-27 21:28:18,700 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 109 places, 123 transitions, 1076 flow. Second operand has 7 states, 7 states have (on average 10.142857142857142) internal successors, (71), 7 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:28:18,700 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:28:18,700 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-27 21:28:18,700 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:28:19,796 INFO L124 PetriNetUnfolderBase]: 1823/2846 cut-off events. [2024-06-27 21:28:19,796 INFO L125 PetriNetUnfolderBase]: For 70047/70047 co-relation queries the response was YES. [2024-06-27 21:28:19,805 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15908 conditions, 2846 events. 1823/2846 cut-off events. For 70047/70047 co-relation queries the response was YES. Maximal size of possible extension queue 129. Compared 14644 event pairs, 529 based on Foata normal form. 2/2848 useless extension candidates. Maximal degree in co-relation 15861. Up to 2678 conditions per place. [2024-06-27 21:28:19,814 INFO L140 encePairwiseOnDemand]: 35/43 looper letters, 131 selfloop transitions, 19 changer transitions 0/155 dead transitions. [2024-06-27 21:28:19,815 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 114 places, 155 transitions, 1554 flow [2024-06-27 21:28:19,815 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 21:28:19,815 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 21:28:19,816 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 110 transitions. [2024-06-27 21:28:19,816 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4263565891472868 [2024-06-27 21:28:19,816 INFO L175 Difference]: Start difference. First operand has 109 places, 123 transitions, 1076 flow. Second operand 6 states and 110 transitions. [2024-06-27 21:28:19,816 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 114 places, 155 transitions, 1554 flow [2024-06-27 21:28:19,867 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 108 places, 155 transitions, 1403 flow, removed 19 selfloop flow, removed 6 redundant places. [2024-06-27 21:28:19,869 INFO L231 Difference]: Finished difference. Result has 110 places, 132 transitions, 1033 flow [2024-06-27 21:28:19,869 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=925, PETRI_DIFFERENCE_MINUEND_PLACES=103, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=123, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=108, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1033, PETRI_PLACES=110, PETRI_TRANSITIONS=132} [2024-06-27 21:28:19,869 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 66 predicate places. [2024-06-27 21:28:19,870 INFO L495 AbstractCegarLoop]: Abstraction has has 110 places, 132 transitions, 1033 flow [2024-06-27 21:28:19,870 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 10.142857142857142) internal successors, (71), 7 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:28:19,870 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:28:19,870 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:28:19,870 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2024-06-27 21:28:19,870 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:28:19,870 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:28:19,871 INFO L85 PathProgramCache]: Analyzing trace with hash -1173694747, now seen corresponding path program 4 times [2024-06-27 21:28:19,871 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:28:19,871 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1502515151] [2024-06-27 21:28:19,871 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:28:19,871 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:28:19,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:28:22,223 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:28:22,224 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:28:22,224 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1502515151] [2024-06-27 21:28:22,225 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1502515151] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:28:22,225 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:28:22,225 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:28:22,226 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [421998232] [2024-06-27 21:28:22,226 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:28:22,226 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:28:22,226 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:28:22,227 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:28:22,227 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:28:22,246 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-27 21:28:22,247 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 110 places, 132 transitions, 1033 flow. Second operand has 9 states, 9 states have (on average 9.444444444444445) internal successors, (85), 9 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:28:22,247 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:28:22,247 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-27 21:28:22,247 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:28:23,593 INFO L124 PetriNetUnfolderBase]: 1815/2828 cut-off events. [2024-06-27 21:28:23,593 INFO L125 PetriNetUnfolderBase]: For 73280/73284 co-relation queries the response was YES. [2024-06-27 21:28:23,602 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15820 conditions, 2828 events. 1815/2828 cut-off events. For 73280/73284 co-relation queries the response was YES. Maximal size of possible extension queue 129. Compared 14559 event pairs, 565 based on Foata normal form. 8/2834 useless extension candidates. Maximal degree in co-relation 15771. Up to 2302 conditions per place. [2024-06-27 21:28:23,611 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 100 selfloop transitions, 61 changer transitions 0/166 dead transitions. [2024-06-27 21:28:23,611 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 117 places, 166 transitions, 1495 flow [2024-06-27 21:28:23,612 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 21:28:23,612 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 21:28:23,612 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 144 transitions. [2024-06-27 21:28:23,612 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4186046511627907 [2024-06-27 21:28:23,613 INFO L175 Difference]: Start difference. First operand has 110 places, 132 transitions, 1033 flow. Second operand 8 states and 144 transitions. [2024-06-27 21:28:23,613 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 117 places, 166 transitions, 1495 flow [2024-06-27 21:28:23,651 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 116 places, 166 transitions, 1481 flow, removed 6 selfloop flow, removed 1 redundant places. [2024-06-27 21:28:23,653 INFO L231 Difference]: Finished difference. Result has 117 places, 134 transitions, 1198 flow [2024-06-27 21:28:23,653 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1019, PETRI_DIFFERENCE_MINUEND_PLACES=109, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=132, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=59, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=71, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1198, PETRI_PLACES=117, PETRI_TRANSITIONS=134} [2024-06-27 21:28:23,655 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 73 predicate places. [2024-06-27 21:28:23,655 INFO L495 AbstractCegarLoop]: Abstraction has has 117 places, 134 transitions, 1198 flow [2024-06-27 21:28:23,655 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.444444444444445) internal successors, (85), 9 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:28:23,655 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:28:23,655 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:28:23,655 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2024-06-27 21:28:23,655 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:28:23,656 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:28:23,656 INFO L85 PathProgramCache]: Analyzing trace with hash 602243503, now seen corresponding path program 2 times [2024-06-27 21:28:23,656 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:28:23,656 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [712049592] [2024-06-27 21:28:23,656 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:28:23,656 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:28:23,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:28:25,656 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:28:25,656 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:28:25,656 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [712049592] [2024-06-27 21:28:25,656 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [712049592] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:28:25,656 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:28:25,656 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 21:28:25,656 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1377157067] [2024-06-27 21:28:25,656 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:28:25,656 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 21:28:25,657 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:28:25,657 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 21:28:25,657 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-27 21:28:25,667 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-27 21:28:25,668 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 117 places, 134 transitions, 1198 flow. Second operand has 7 states, 7 states have (on average 10.142857142857142) internal successors, (71), 7 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:28:25,668 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:28:25,668 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-27 21:28:25,668 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:28:26,699 INFO L124 PetriNetUnfolderBase]: 1809/2814 cut-off events. [2024-06-27 21:28:26,699 INFO L125 PetriNetUnfolderBase]: For 78276/78276 co-relation queries the response was YES. [2024-06-27 21:28:26,709 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16336 conditions, 2814 events. 1809/2814 cut-off events. For 78276/78276 co-relation queries the response was YES. Maximal size of possible extension queue 127. Compared 14427 event pairs, 541 based on Foata normal form. 2/2814 useless extension candidates. Maximal degree in co-relation 16284. Up to 2661 conditions per place. [2024-06-27 21:28:26,718 INFO L140 encePairwiseOnDemand]: 35/43 looper letters, 124 selfloop transitions, 19 changer transitions 0/148 dead transitions. [2024-06-27 21:28:26,719 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 122 places, 148 transitions, 1540 flow [2024-06-27 21:28:26,719 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 21:28:26,719 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 21:28:26,721 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 102 transitions. [2024-06-27 21:28:26,721 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3953488372093023 [2024-06-27 21:28:26,721 INFO L175 Difference]: Start difference. First operand has 117 places, 134 transitions, 1198 flow. Second operand 6 states and 102 transitions. [2024-06-27 21:28:26,721 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 122 places, 148 transitions, 1540 flow [2024-06-27 21:28:26,759 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 116 places, 148 transitions, 1373 flow, removed 24 selfloop flow, removed 6 redundant places. [2024-06-27 21:28:26,760 INFO L231 Difference]: Finished difference. Result has 117 places, 134 transitions, 1075 flow [2024-06-27 21:28:26,761 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1031, PETRI_DIFFERENCE_MINUEND_PLACES=111, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=134, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=115, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1075, PETRI_PLACES=117, PETRI_TRANSITIONS=134} [2024-06-27 21:28:26,763 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 73 predicate places. [2024-06-27 21:28:26,763 INFO L495 AbstractCegarLoop]: Abstraction has has 117 places, 134 transitions, 1075 flow [2024-06-27 21:28:26,763 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 10.142857142857142) internal successors, (71), 7 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:28:26,763 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:28:26,763 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:28:26,763 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2024-06-27 21:28:26,763 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:28:26,765 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:28:26,765 INFO L85 PathProgramCache]: Analyzing trace with hash 208657707, now seen corresponding path program 1 times [2024-06-27 21:28:26,765 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:28:26,765 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1337820936] [2024-06-27 21:28:26,766 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:28:26,766 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:28:26,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:28:28,595 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:28:28,595 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:28:28,595 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1337820936] [2024-06-27 21:28:28,596 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1337820936] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:28:28,596 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:28:28,596 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 21:28:28,596 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2009797847] [2024-06-27 21:28:28,596 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:28:28,596 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 21:28:28,596 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:28:28,596 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 21:28:28,596 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-27 21:28:28,617 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-27 21:28:28,617 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 117 places, 134 transitions, 1075 flow. Second operand has 7 states, 7 states have (on average 11.142857142857142) internal successors, (78), 7 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:28:28,617 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:28:28,617 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-27 21:28:28,617 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:28:29,667 INFO L124 PetriNetUnfolderBase]: 1691/2724 cut-off events. [2024-06-27 21:28:29,667 INFO L125 PetriNetUnfolderBase]: For 70877/70881 co-relation queries the response was YES. [2024-06-27 21:28:29,675 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15029 conditions, 2724 events. 1691/2724 cut-off events. For 70877/70881 co-relation queries the response was YES. Maximal size of possible extension queue 130. Compared 14538 event pairs, 448 based on Foata normal form. 6/2720 useless extension candidates. Maximal degree in co-relation 14976. Up to 2444 conditions per place. [2024-06-27 21:28:29,682 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 132 selfloop transitions, 23 changer transitions 0/164 dead transitions. [2024-06-27 21:28:29,682 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 122 places, 164 transitions, 1643 flow [2024-06-27 21:28:29,683 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 21:28:29,683 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 21:28:29,683 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 115 transitions. [2024-06-27 21:28:29,684 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44573643410852715 [2024-06-27 21:28:29,684 INFO L175 Difference]: Start difference. First operand has 117 places, 134 transitions, 1075 flow. Second operand 6 states and 115 transitions. [2024-06-27 21:28:29,684 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 122 places, 164 transitions, 1643 flow [2024-06-27 21:28:29,720 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 118 places, 164 transitions, 1602 flow, removed 3 selfloop flow, removed 4 redundant places. [2024-06-27 21:28:29,722 INFO L231 Difference]: Finished difference. Result has 120 places, 143 transitions, 1202 flow [2024-06-27 21:28:29,722 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1034, PETRI_DIFFERENCE_MINUEND_PLACES=113, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=134, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=116, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1202, PETRI_PLACES=120, PETRI_TRANSITIONS=143} [2024-06-27 21:28:29,722 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 76 predicate places. [2024-06-27 21:28:29,722 INFO L495 AbstractCegarLoop]: Abstraction has has 120 places, 143 transitions, 1202 flow [2024-06-27 21:28:29,723 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 11.142857142857142) internal successors, (78), 7 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:28:29,723 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:28:29,723 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:28:29,723 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2024-06-27 21:28:29,723 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:28:29,723 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:28:29,723 INFO L85 PathProgramCache]: Analyzing trace with hash 615656397, now seen corresponding path program 2 times [2024-06-27 21:28:29,723 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:28:29,724 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1956189954] [2024-06-27 21:28:29,724 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:28:29,724 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:28:29,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:28:31,522 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:28:31,522 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:28:31,522 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1956189954] [2024-06-27 21:28:31,522 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1956189954] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:28:31,522 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:28:31,522 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 21:28:31,523 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [873592785] [2024-06-27 21:28:31,523 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:28:31,523 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 21:28:31,524 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:28:31,524 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 21:28:31,531 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-27 21:28:31,558 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-27 21:28:31,558 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 120 places, 143 transitions, 1202 flow. Second operand has 7 states, 7 states have (on average 11.142857142857142) internal successors, (78), 7 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:28:31,558 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:28:31,558 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-27 21:28:31,558 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:28:32,369 INFO L124 PetriNetUnfolderBase]: 1715/2754 cut-off events. [2024-06-27 21:28:32,369 INFO L125 PetriNetUnfolderBase]: For 76277/76277 co-relation queries the response was YES. [2024-06-27 21:28:32,379 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15760 conditions, 2754 events. 1715/2754 cut-off events. For 76277/76277 co-relation queries the response was YES. Maximal size of possible extension queue 132. Compared 14782 event pairs, 459 based on Foata normal form. 3/2752 useless extension candidates. Maximal degree in co-relation 15705. Up to 2534 conditions per place. [2024-06-27 21:28:32,388 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 138 selfloop transitions, 16 changer transitions 0/163 dead transitions. [2024-06-27 21:28:32,388 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 126 places, 163 transitions, 1639 flow [2024-06-27 21:28:32,389 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 21:28:32,389 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 21:28:32,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 120 transitions. [2024-06-27 21:28:32,390 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39867109634551495 [2024-06-27 21:28:32,390 INFO L175 Difference]: Start difference. First operand has 120 places, 143 transitions, 1202 flow. Second operand 7 states and 120 transitions. [2024-06-27 21:28:32,390 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 126 places, 163 transitions, 1639 flow [2024-06-27 21:28:32,446 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 125 places, 163 transitions, 1575 flow, removed 31 selfloop flow, removed 1 redundant places. [2024-06-27 21:28:32,448 INFO L231 Difference]: Finished difference. Result has 127 places, 146 transitions, 1216 flow [2024-06-27 21:28:32,448 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1140, PETRI_DIFFERENCE_MINUEND_PLACES=119, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=143, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=127, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1216, PETRI_PLACES=127, PETRI_TRANSITIONS=146} [2024-06-27 21:28:32,448 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 83 predicate places. [2024-06-27 21:28:32,448 INFO L495 AbstractCegarLoop]: Abstraction has has 127 places, 146 transitions, 1216 flow [2024-06-27 21:28:32,449 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 11.142857142857142) internal successors, (78), 7 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:28:32,449 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:28:32,449 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:28:32,449 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2024-06-27 21:28:32,449 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:28:32,449 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:28:32,450 INFO L85 PathProgramCache]: Analyzing trace with hash 1924123063, now seen corresponding path program 1 times [2024-06-27 21:28:32,450 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:28:32,451 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1663800795] [2024-06-27 21:28:32,451 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:28:32,451 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:28:32,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:28:34,959 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:28:34,959 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:28:34,959 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1663800795] [2024-06-27 21:28:34,959 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1663800795] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:28:34,959 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:28:34,959 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:28:34,959 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1714103424] [2024-06-27 21:28:34,959 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:28:34,960 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:28:34,960 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:28:34,960 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:28:34,960 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:28:35,007 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-27 21:28:35,007 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 127 places, 146 transitions, 1216 flow. Second operand has 9 states, 9 states have (on average 9.555555555555555) internal successors, (86), 9 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:28:35,008 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:28:35,008 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-27 21:28:35,008 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:28:36,080 INFO L124 PetriNetUnfolderBase]: 1931/3017 cut-off events. [2024-06-27 21:28:36,080 INFO L125 PetriNetUnfolderBase]: For 100598/100598 co-relation queries the response was YES. [2024-06-27 21:28:36,091 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17657 conditions, 3017 events. 1931/3017 cut-off events. For 100598/100598 co-relation queries the response was YES. Maximal size of possible extension queue 138. Compared 15701 event pairs, 418 based on Foata normal form. 16/3033 useless extension candidates. Maximal degree in co-relation 17598. Up to 2434 conditions per place. [2024-06-27 21:28:36,101 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 171 selfloop transitions, 25 changer transitions 0/201 dead transitions. [2024-06-27 21:28:36,101 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 135 places, 201 transitions, 1900 flow [2024-06-27 21:28:36,102 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 21:28:36,102 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 21:28:36,102 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 173 transitions. [2024-06-27 21:28:36,103 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4470284237726098 [2024-06-27 21:28:36,103 INFO L175 Difference]: Start difference. First operand has 127 places, 146 transitions, 1216 flow. Second operand 9 states and 173 transitions. [2024-06-27 21:28:36,103 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 135 places, 201 transitions, 1900 flow [2024-06-27 21:28:36,165 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 130 places, 201 transitions, 1860 flow, removed 4 selfloop flow, removed 5 redundant places. [2024-06-27 21:28:36,167 INFO L231 Difference]: Finished difference. Result has 131 places, 147 transitions, 1255 flow [2024-06-27 21:28:36,167 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1176, PETRI_DIFFERENCE_MINUEND_PLACES=122, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=146, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=122, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1255, PETRI_PLACES=131, PETRI_TRANSITIONS=147} [2024-06-27 21:28:36,168 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 87 predicate places. [2024-06-27 21:28:36,168 INFO L495 AbstractCegarLoop]: Abstraction has has 131 places, 147 transitions, 1255 flow [2024-06-27 21:28:36,168 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.555555555555555) internal successors, (86), 9 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:28:36,168 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:28:36,168 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:28:36,169 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2024-06-27 21:28:36,169 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:28:36,169 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:28:36,169 INFO L85 PathProgramCache]: Analyzing trace with hash -2081321895, now seen corresponding path program 2 times [2024-06-27 21:28:36,169 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:28:36,169 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1489405180] [2024-06-27 21:28:36,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:28:36,170 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:28:36,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:28:38,623 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:28:38,623 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:28:38,623 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1489405180] [2024-06-27 21:28:38,623 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1489405180] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:28:38,623 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:28:38,623 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:28:38,624 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [412025409] [2024-06-27 21:28:38,624 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:28:38,624 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:28:38,624 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:28:38,624 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:28:38,625 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:28:38,646 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-27 21:28:38,646 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 131 places, 147 transitions, 1255 flow. Second operand has 9 states, 9 states have (on average 9.555555555555555) internal successors, (86), 9 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:28:38,647 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:28:38,647 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-27 21:28:38,647 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:28:39,796 INFO L124 PetriNetUnfolderBase]: 1895/2961 cut-off events. [2024-06-27 21:28:39,796 INFO L125 PetriNetUnfolderBase]: For 98838/98838 co-relation queries the response was YES. [2024-06-27 21:28:39,807 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17114 conditions, 2961 events. 1895/2961 cut-off events. For 98838/98838 co-relation queries the response was YES. Maximal size of possible extension queue 134. Compared 15322 event pairs, 526 based on Foata normal form. 20/2981 useless extension candidates. Maximal degree in co-relation 17054. Up to 2636 conditions per place. [2024-06-27 21:28:39,817 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 170 selfloop transitions, 20 changer transitions 0/195 dead transitions. [2024-06-27 21:28:39,817 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 139 places, 195 transitions, 1779 flow [2024-06-27 21:28:39,818 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 21:28:39,818 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 21:28:39,818 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 166 transitions. [2024-06-27 21:28:39,818 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4289405684754522 [2024-06-27 21:28:39,819 INFO L175 Difference]: Start difference. First operand has 131 places, 147 transitions, 1255 flow. Second operand 9 states and 166 transitions. [2024-06-27 21:28:39,819 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 139 places, 195 transitions, 1779 flow [2024-06-27 21:28:39,893 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 133 places, 195 transitions, 1714 flow, removed 14 selfloop flow, removed 6 redundant places. [2024-06-27 21:28:39,895 INFO L231 Difference]: Finished difference. Result has 134 places, 147 transitions, 1237 flow [2024-06-27 21:28:39,896 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1190, PETRI_DIFFERENCE_MINUEND_PLACES=125, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=147, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=127, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1237, PETRI_PLACES=134, PETRI_TRANSITIONS=147} [2024-06-27 21:28:39,896 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 90 predicate places. [2024-06-27 21:28:39,896 INFO L495 AbstractCegarLoop]: Abstraction has has 134 places, 147 transitions, 1237 flow [2024-06-27 21:28:39,896 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.555555555555555) internal successors, (86), 9 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:28:39,896 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:28:39,897 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:28:39,897 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2024-06-27 21:28:39,897 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:28:39,897 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:28:39,897 INFO L85 PathProgramCache]: Analyzing trace with hash -1963923981, now seen corresponding path program 3 times [2024-06-27 21:28:39,897 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:28:39,897 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [630866828] [2024-06-27 21:28:39,898 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:28:39,898 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:28:39,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:28:42,286 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:28:42,286 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:28:42,286 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [630866828] [2024-06-27 21:28:42,286 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [630866828] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:28:42,286 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:28:42,287 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:28:42,287 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1033705101] [2024-06-27 21:28:42,287 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:28:42,287 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:28:42,287 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:28:42,287 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:28:42,288 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:28:42,322 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-27 21:28:42,322 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 134 places, 147 transitions, 1237 flow. Second operand has 9 states, 9 states have (on average 9.555555555555555) internal successors, (86), 9 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:28:42,322 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:28:42,322 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-27 21:28:42,322 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:28:43,745 INFO L124 PetriNetUnfolderBase]: 1983/3137 cut-off events. [2024-06-27 21:28:43,745 INFO L125 PetriNetUnfolderBase]: For 106146/106154 co-relation queries the response was YES. [2024-06-27 21:28:43,757 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17745 conditions, 3137 events. 1983/3137 cut-off events. For 106146/106154 co-relation queries the response was YES. Maximal size of possible extension queue 146. Compared 16637 event pairs, 472 based on Foata normal form. 28/3165 useless extension candidates. Maximal degree in co-relation 17684. Up to 2453 conditions per place. [2024-06-27 21:28:43,768 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 127 selfloop transitions, 59 changer transitions 0/191 dead transitions. [2024-06-27 21:28:43,768 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 141 places, 191 transitions, 1765 flow [2024-06-27 21:28:43,769 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 21:28:43,769 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 21:28:43,769 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 155 transitions. [2024-06-27 21:28:43,769 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45058139534883723 [2024-06-27 21:28:43,770 INFO L175 Difference]: Start difference. First operand has 134 places, 147 transitions, 1237 flow. Second operand 8 states and 155 transitions. [2024-06-27 21:28:43,770 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 141 places, 191 transitions, 1765 flow [2024-06-27 21:28:43,822 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 132 places, 191 transitions, 1704 flow, removed 2 selfloop flow, removed 9 redundant places. [2024-06-27 21:28:43,824 INFO L231 Difference]: Finished difference. Result has 133 places, 148 transitions, 1331 flow [2024-06-27 21:28:43,825 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1176, PETRI_DIFFERENCE_MINUEND_PLACES=125, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=147, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=58, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=88, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1331, PETRI_PLACES=133, PETRI_TRANSITIONS=148} [2024-06-27 21:28:43,825 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 89 predicate places. [2024-06-27 21:28:43,825 INFO L495 AbstractCegarLoop]: Abstraction has has 133 places, 148 transitions, 1331 flow [2024-06-27 21:28:43,825 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.555555555555555) internal successors, (86), 9 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:28:43,825 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:28:43,826 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:28:43,826 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2024-06-27 21:28:43,826 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:28:43,826 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:28:43,826 INFO L85 PathProgramCache]: Analyzing trace with hash 2131741525, now seen corresponding path program 4 times [2024-06-27 21:28:43,826 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:28:43,826 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1567649191] [2024-06-27 21:28:43,827 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:28:43,827 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:28:43,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:28:46,516 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:28:46,517 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:28:46,517 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1567649191] [2024-06-27 21:28:46,517 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1567649191] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:28:46,517 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:28:46,517 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:28:46,517 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1049114561] [2024-06-27 21:28:46,517 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:28:46,517 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:28:46,517 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:28:46,518 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:28:46,518 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:28:46,535 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-27 21:28:46,535 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 133 places, 148 transitions, 1331 flow. Second operand has 10 states, 10 states have (on average 9.4) internal successors, (94), 10 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:28:46,535 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:28:46,535 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-27 21:28:46,535 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:28:48,195 INFO L124 PetriNetUnfolderBase]: 2071/3280 cut-off events. [2024-06-27 21:28:48,196 INFO L125 PetriNetUnfolderBase]: For 114918/114922 co-relation queries the response was YES. [2024-06-27 21:28:48,209 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18735 conditions, 3280 events. 2071/3280 cut-off events. For 114918/114922 co-relation queries the response was YES. Maximal size of possible extension queue 160. Compared 17686 event pairs, 509 based on Foata normal form. 24/3304 useless extension candidates. Maximal degree in co-relation 18673. Up to 2601 conditions per place. [2024-06-27 21:28:48,219 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 134 selfloop transitions, 57 changer transitions 0/196 dead transitions. [2024-06-27 21:28:48,220 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 141 places, 196 transitions, 1883 flow [2024-06-27 21:28:48,220 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 21:28:48,220 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 21:28:48,221 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 170 transitions. [2024-06-27 21:28:48,221 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4392764857881137 [2024-06-27 21:28:48,221 INFO L175 Difference]: Start difference. First operand has 133 places, 148 transitions, 1331 flow. Second operand 9 states and 170 transitions. [2024-06-27 21:28:48,221 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 141 places, 196 transitions, 1883 flow [2024-06-27 21:28:48,290 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 135 places, 196 transitions, 1746 flow, removed 11 selfloop flow, removed 6 redundant places. [2024-06-27 21:28:48,292 INFO L231 Difference]: Finished difference. Result has 136 places, 149 transitions, 1347 flow [2024-06-27 21:28:48,292 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1194, PETRI_DIFFERENCE_MINUEND_PLACES=127, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=148, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=56, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=91, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1347, PETRI_PLACES=136, PETRI_TRANSITIONS=149} [2024-06-27 21:28:48,293 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 92 predicate places. [2024-06-27 21:28:48,293 INFO L495 AbstractCegarLoop]: Abstraction has has 136 places, 149 transitions, 1347 flow [2024-06-27 21:28:48,293 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.4) internal successors, (94), 10 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:28:48,293 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:28:48,293 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:28:48,293 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2024-06-27 21:28:48,293 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:28:48,294 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:28:48,294 INFO L85 PathProgramCache]: Analyzing trace with hash 2131593655, now seen corresponding path program 5 times [2024-06-27 21:28:48,294 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:28:48,294 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [497248597] [2024-06-27 21:28:48,294 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:28:48,294 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:28:48,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:28:51,079 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:28:51,079 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:28:51,079 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [497248597] [2024-06-27 21:28:51,080 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [497248597] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:28:51,080 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:28:51,080 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:28:51,080 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2095657947] [2024-06-27 21:28:51,080 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:28:51,080 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:28:51,080 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:28:51,080 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:28:51,080 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:28:51,093 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-27 21:28:51,093 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 136 places, 149 transitions, 1347 flow. Second operand has 10 states, 10 states have (on average 9.4) internal successors, (94), 10 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:28:51,093 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:28:51,093 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-27 21:28:51,093 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:28:52,743 INFO L124 PetriNetUnfolderBase]: 2139/3396 cut-off events. [2024-06-27 21:28:52,743 INFO L125 PetriNetUnfolderBase]: For 119563/119567 co-relation queries the response was YES. [2024-06-27 21:28:52,756 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19254 conditions, 3396 events. 2139/3396 cut-off events. For 119563/119567 co-relation queries the response was YES. Maximal size of possible extension queue 168. Compared 18499 event pairs, 493 based on Foata normal form. 20/3416 useless extension candidates. Maximal degree in co-relation 19191. Up to 2583 conditions per place. [2024-06-27 21:28:52,767 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 141 selfloop transitions, 60 changer transitions 0/206 dead transitions. [2024-06-27 21:28:52,767 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 145 places, 206 transitions, 1947 flow [2024-06-27 21:28:52,768 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 21:28:52,768 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 21:28:52,768 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 189 transitions. [2024-06-27 21:28:52,769 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43953488372093025 [2024-06-27 21:28:52,769 INFO L175 Difference]: Start difference. First operand has 136 places, 149 transitions, 1347 flow. Second operand 10 states and 189 transitions. [2024-06-27 21:28:52,769 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 145 places, 206 transitions, 1947 flow [2024-06-27 21:28:52,837 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 138 places, 206 transitions, 1812 flow, removed 12 selfloop flow, removed 7 redundant places. [2024-06-27 21:28:52,839 INFO L231 Difference]: Finished difference. Result has 139 places, 150 transitions, 1372 flow [2024-06-27 21:28:52,839 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1212, PETRI_DIFFERENCE_MINUEND_PLACES=129, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=149, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=59, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=89, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1372, PETRI_PLACES=139, PETRI_TRANSITIONS=150} [2024-06-27 21:28:52,840 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 95 predicate places. [2024-06-27 21:28:52,840 INFO L495 AbstractCegarLoop]: Abstraction has has 139 places, 150 transitions, 1372 flow [2024-06-27 21:28:52,840 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.4) internal successors, (94), 10 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:28:52,840 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:28:52,840 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:28:52,840 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2024-06-27 21:28:52,841 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:28:52,841 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:28:52,841 INFO L85 PathProgramCache]: Analyzing trace with hash -1078936279, now seen corresponding path program 1 times [2024-06-27 21:28:52,841 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:28:52,841 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [754708444] [2024-06-27 21:28:52,841 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:28:52,841 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:28:52,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:28:55,603 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:28:55,603 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:28:55,604 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [754708444] [2024-06-27 21:28:55,604 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [754708444] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:28:55,604 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:28:55,604 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:28:55,604 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [420960559] [2024-06-27 21:28:55,604 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:28:55,605 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:28:55,606 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:28:55,606 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:28:55,606 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:28:55,629 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-27 21:28:55,629 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 139 places, 150 transitions, 1372 flow. Second operand has 10 states, 10 states have (on average 9.5) internal successors, (95), 10 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) [2024-06-27 21:28:55,629 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:28:55,629 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-27 21:28:55,629 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:28:57,111 INFO L124 PetriNetUnfolderBase]: 2311/3683 cut-off events. [2024-06-27 21:28:57,112 INFO L125 PetriNetUnfolderBase]: For 137616/137624 co-relation queries the response was YES. [2024-06-27 21:28:57,124 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21340 conditions, 3683 events. 2311/3683 cut-off events. For 137616/137624 co-relation queries the response was YES. Maximal size of possible extension queue 190. Compared 20644 event pairs, 534 based on Foata normal form. 20/3703 useless extension candidates. Maximal degree in co-relation 21276. Up to 2405 conditions per place. [2024-06-27 21:28:57,133 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 132 selfloop transitions, 62 changer transitions 0/199 dead transitions. [2024-06-27 21:28:57,134 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 146 places, 199 transitions, 2100 flow [2024-06-27 21:28:57,135 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 21:28:57,135 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 21:28:57,135 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 158 transitions. [2024-06-27 21:28:57,135 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45930232558139533 [2024-06-27 21:28:57,136 INFO L175 Difference]: Start difference. First operand has 139 places, 150 transitions, 1372 flow. Second operand 8 states and 158 transitions. [2024-06-27 21:28:57,136 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 146 places, 199 transitions, 2100 flow [2024-06-27 21:28:57,223 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 138 places, 199 transitions, 1952 flow, removed 15 selfloop flow, removed 8 redundant places. [2024-06-27 21:28:57,225 INFO L231 Difference]: Finished difference. Result has 139 places, 152 transitions, 1424 flow [2024-06-27 21:28:57,225 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1224, PETRI_DIFFERENCE_MINUEND_PLACES=131, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=150, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=61, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=89, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1424, PETRI_PLACES=139, PETRI_TRANSITIONS=152} [2024-06-27 21:28:57,225 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 95 predicate places. [2024-06-27 21:28:57,225 INFO L495 AbstractCegarLoop]: Abstraction has has 139 places, 152 transitions, 1424 flow [2024-06-27 21:28:57,226 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.5) internal successors, (95), 10 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) [2024-06-27 21:28:57,226 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:28:57,226 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:28:57,226 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2024-06-27 21:28:57,226 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:28:57,226 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:28:57,227 INFO L85 PathProgramCache]: Analyzing trace with hash -384504645, now seen corresponding path program 1 times [2024-06-27 21:28:57,227 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:28:57,227 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [35463361] [2024-06-27 21:28:57,227 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:28:57,227 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:28:57,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:28:59,483 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:28:59,484 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:28:59,484 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [35463361] [2024-06-27 21:28:59,484 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [35463361] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:28:59,484 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:28:59,484 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 21:28:59,484 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2078019884] [2024-06-27 21:28:59,485 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:28:59,486 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 21:28:59,486 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:28:59,486 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 21:28:59,486 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-27 21:28:59,547 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-27 21:28:59,548 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 139 places, 152 transitions, 1424 flow. Second operand has 8 states, 8 states have (on average 10.0) internal successors, (80), 8 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:28:59,548 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:28:59,548 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-27 21:28:59,548 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:29:00,984 INFO L124 PetriNetUnfolderBase]: 2331/3709 cut-off events. [2024-06-27 21:29:00,985 INFO L125 PetriNetUnfolderBase]: For 139081/139081 co-relation queries the response was YES. [2024-06-27 21:29:00,999 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21525 conditions, 3709 events. 2331/3709 cut-off events. For 139081/139081 co-relation queries the response was YES. Maximal size of possible extension queue 195. Compared 20812 event pairs, 666 based on Foata normal form. 4/3713 useless extension candidates. Maximal degree in co-relation 21460. Up to 3474 conditions per place. [2024-06-27 21:29:01,009 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 155 selfloop transitions, 26 changer transitions 0/186 dead transitions. [2024-06-27 21:29:01,009 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 145 places, 186 transitions, 2010 flow [2024-06-27 21:29:01,010 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 21:29:01,010 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 21:29:01,010 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 128 transitions. [2024-06-27 21:29:01,010 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42524916943521596 [2024-06-27 21:29:01,011 INFO L175 Difference]: Start difference. First operand has 139 places, 152 transitions, 1424 flow. Second operand 7 states and 128 transitions. [2024-06-27 21:29:01,011 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 145 places, 186 transitions, 2010 flow [2024-06-27 21:29:01,085 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 141 places, 186 transitions, 1912 flow, removed 16 selfloop flow, removed 4 redundant places. [2024-06-27 21:29:01,087 INFO L231 Difference]: Finished difference. Result has 142 places, 158 transitions, 1442 flow [2024-06-27 21:29:01,087 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1326, PETRI_DIFFERENCE_MINUEND_PLACES=135, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=152, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=129, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1442, PETRI_PLACES=142, PETRI_TRANSITIONS=158} [2024-06-27 21:29:01,087 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 98 predicate places. [2024-06-27 21:29:01,087 INFO L495 AbstractCegarLoop]: Abstraction has has 142 places, 158 transitions, 1442 flow [2024-06-27 21:29:01,088 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.0) internal successors, (80), 8 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:29:01,088 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:29:01,088 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:29:01,088 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2024-06-27 21:29:01,088 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:29:01,088 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:29:01,088 INFO L85 PathProgramCache]: Analyzing trace with hash 1794382455, now seen corresponding path program 6 times [2024-06-27 21:29:01,089 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:29:01,089 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1318152099] [2024-06-27 21:29:01,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:29:01,089 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:29:01,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:29:03,512 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:29:03,512 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:29:03,512 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1318152099] [2024-06-27 21:29:03,513 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1318152099] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:29:03,513 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:29:03,513 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:29:03,513 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [647815452] [2024-06-27 21:29:03,513 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:29:03,513 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:29:03,513 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:29:03,513 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:29:03,513 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:29:03,546 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-27 21:29:03,547 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 142 places, 158 transitions, 1442 flow. Second operand has 9 states, 9 states have (on average 9.555555555555555) internal successors, (86), 9 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:29:03,547 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:29:03,547 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-27 21:29:03,547 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:29:05,036 INFO L124 PetriNetUnfolderBase]: 2419/3862 cut-off events. [2024-06-27 21:29:05,036 INFO L125 PetriNetUnfolderBase]: For 155806/155814 co-relation queries the response was YES. [2024-06-27 21:29:05,051 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22559 conditions, 3862 events. 2419/3862 cut-off events. For 155806/155814 co-relation queries the response was YES. Maximal size of possible extension queue 207. Compared 21955 event pairs, 623 based on Foata normal form. 28/3888 useless extension candidates. Maximal degree in co-relation 22492. Up to 3181 conditions per place. [2024-06-27 21:29:05,061 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 135 selfloop transitions, 57 changer transitions 0/197 dead transitions. [2024-06-27 21:29:05,062 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 149 places, 197 transitions, 1980 flow [2024-06-27 21:29:05,063 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 21:29:05,063 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 21:29:05,063 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 149 transitions. [2024-06-27 21:29:05,063 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4331395348837209 [2024-06-27 21:29:05,063 INFO L175 Difference]: Start difference. First operand has 142 places, 158 transitions, 1442 flow. Second operand 8 states and 149 transitions. [2024-06-27 21:29:05,064 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 149 places, 197 transitions, 1980 flow [2024-06-27 21:29:05,170 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 146 places, 197 transitions, 1942 flow, removed 11 selfloop flow, removed 3 redundant places. [2024-06-27 21:29:05,172 INFO L231 Difference]: Finished difference. Result has 147 places, 159 transitions, 1563 flow [2024-06-27 21:29:05,172 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1404, PETRI_DIFFERENCE_MINUEND_PLACES=139, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=158, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=56, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=101, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1563, PETRI_PLACES=147, PETRI_TRANSITIONS=159} [2024-06-27 21:29:05,172 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 103 predicate places. [2024-06-27 21:29:05,173 INFO L495 AbstractCegarLoop]: Abstraction has has 147 places, 159 transitions, 1563 flow [2024-06-27 21:29:05,173 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.555555555555555) internal successors, (86), 9 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:29:05,173 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:29:05,173 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:29:05,173 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2024-06-27 21:29:05,173 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:29:05,174 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:29:05,174 INFO L85 PathProgramCache]: Analyzing trace with hash 1745591411, now seen corresponding path program 7 times [2024-06-27 21:29:05,174 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:29:05,174 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1338679020] [2024-06-27 21:29:05,174 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:29:05,174 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:29:05,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:29:07,866 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:29:07,866 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:29:07,866 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1338679020] [2024-06-27 21:29:07,867 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1338679020] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:29:07,867 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:29:07,867 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:29:07,867 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1796502213] [2024-06-27 21:29:07,867 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:29:07,867 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:29:07,867 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:29:07,868 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:29:07,868 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:29:07,890 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-27 21:29:07,891 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 147 places, 159 transitions, 1563 flow. Second operand has 10 states, 10 states have (on average 9.4) internal successors, (94), 10 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:29:07,891 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:29:07,891 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-27 21:29:07,891 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:29:09,550 INFO L124 PetriNetUnfolderBase]: 2383/3809 cut-off events. [2024-06-27 21:29:09,551 INFO L125 PetriNetUnfolderBase]: For 152027/152031 co-relation queries the response was YES. [2024-06-27 21:29:09,568 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22060 conditions, 3809 events. 2383/3809 cut-off events. For 152027/152031 co-relation queries the response was YES. Maximal size of possible extension queue 205. Compared 21709 event pairs, 662 based on Foata normal form. 24/3831 useless extension candidates. Maximal degree in co-relation 21991. Up to 3125 conditions per place. [2024-06-27 21:29:09,580 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 136 selfloop transitions, 60 changer transitions 0/201 dead transitions. [2024-06-27 21:29:09,580 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 155 places, 201 transitions, 2085 flow [2024-06-27 21:29:09,581 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 21:29:09,581 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 21:29:09,584 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 164 transitions. [2024-06-27 21:29:09,584 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42377260981912146 [2024-06-27 21:29:09,584 INFO L175 Difference]: Start difference. First operand has 147 places, 159 transitions, 1563 flow. Second operand 9 states and 164 transitions. [2024-06-27 21:29:09,584 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 155 places, 201 transitions, 2085 flow [2024-06-27 21:29:09,715 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 149 places, 201 transitions, 1928 flow, removed 23 selfloop flow, removed 6 redundant places. [2024-06-27 21:29:09,717 INFO L231 Difference]: Finished difference. Result has 150 places, 159 transitions, 1533 flow [2024-06-27 21:29:09,717 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1406, PETRI_DIFFERENCE_MINUEND_PLACES=141, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=159, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=60, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=99, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1533, PETRI_PLACES=150, PETRI_TRANSITIONS=159} [2024-06-27 21:29:09,726 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 106 predicate places. [2024-06-27 21:29:09,727 INFO L495 AbstractCegarLoop]: Abstraction has has 150 places, 159 transitions, 1533 flow [2024-06-27 21:29:09,727 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.4) internal successors, (94), 10 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:29:09,727 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:29:09,727 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:29:09,727 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2024-06-27 21:29:09,727 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:29:09,728 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:29:09,728 INFO L85 PathProgramCache]: Analyzing trace with hash -2024797057, now seen corresponding path program 8 times [2024-06-27 21:29:09,728 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:29:09,728 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1196734164] [2024-06-27 21:29:09,728 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:29:09,728 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:29:09,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:29:12,194 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:29:12,195 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:29:12,195 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1196734164] [2024-06-27 21:29:12,195 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1196734164] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:29:12,195 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:29:12,195 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:29:12,195 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1162160476] [2024-06-27 21:29:12,196 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:29:12,196 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:29:12,196 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:29:12,196 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:29:12,196 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:29:12,223 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-27 21:29:12,223 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 150 places, 159 transitions, 1533 flow. Second operand has 10 states, 10 states have (on average 9.4) internal successors, (94), 10 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:29:12,223 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:29:12,223 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-27 21:29:12,224 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:29:13,650 INFO L124 PetriNetUnfolderBase]: 2395/3829 cut-off events. [2024-06-27 21:29:13,651 INFO L125 PetriNetUnfolderBase]: For 147656/147660 co-relation queries the response was YES. [2024-06-27 21:29:13,668 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21651 conditions, 3829 events. 2395/3829 cut-off events. For 147656/147660 co-relation queries the response was YES. Maximal size of possible extension queue 206. Compared 21824 event pairs, 642 based on Foata normal form. 20/3847 useless extension candidates. Maximal degree in co-relation 21581. Up to 3019 conditions per place. [2024-06-27 21:29:13,681 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 143 selfloop transitions, 63 changer transitions 0/211 dead transitions. [2024-06-27 21:29:13,681 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 159 places, 211 transitions, 2139 flow [2024-06-27 21:29:13,682 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 21:29:13,682 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 21:29:13,682 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 183 transitions. [2024-06-27 21:29:13,683 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4255813953488372 [2024-06-27 21:29:13,683 INFO L175 Difference]: Start difference. First operand has 150 places, 159 transitions, 1533 flow. Second operand 10 states and 183 transitions. [2024-06-27 21:29:13,683 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 159 places, 211 transitions, 2139 flow [2024-06-27 21:29:13,898 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 151 places, 211 transitions, 1997 flow, removed 4 selfloop flow, removed 8 redundant places. [2024-06-27 21:29:13,900 INFO L231 Difference]: Finished difference. Result has 152 places, 160 transitions, 1563 flow [2024-06-27 21:29:13,901 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1391, PETRI_DIFFERENCE_MINUEND_PLACES=142, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=159, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=62, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=96, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1563, PETRI_PLACES=152, PETRI_TRANSITIONS=160} [2024-06-27 21:29:13,902 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 108 predicate places. [2024-06-27 21:29:13,902 INFO L495 AbstractCegarLoop]: Abstraction has has 152 places, 160 transitions, 1563 flow [2024-06-27 21:29:13,902 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.4) internal successors, (94), 10 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:29:13,902 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:29:13,902 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:29:13,902 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2024-06-27 21:29:13,902 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:29:13,903 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:29:13,903 INFO L85 PathProgramCache]: Analyzing trace with hash -407557555, now seen corresponding path program 2 times [2024-06-27 21:29:13,903 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:29:13,903 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [579885408] [2024-06-27 21:29:13,903 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:29:13,904 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:29:13,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:29:17,042 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:29:17,042 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:29:17,042 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [579885408] [2024-06-27 21:29:17,042 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [579885408] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:29:17,042 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:29:17,042 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:29:17,042 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [696271999] [2024-06-27 21:29:17,042 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:29:17,042 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:29:17,043 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:29:17,043 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:29:17,043 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:29:17,086 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-27 21:29:17,086 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 152 places, 160 transitions, 1563 flow. Second operand has 10 states, 10 states have (on average 9.5) internal successors, (95), 10 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) [2024-06-27 21:29:17,087 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:29:17,087 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-27 21:29:17,087 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:29:18,630 INFO L124 PetriNetUnfolderBase]: 2443/3924 cut-off events. [2024-06-27 21:29:18,630 INFO L125 PetriNetUnfolderBase]: For 153979/153987 co-relation queries the response was YES. [2024-06-27 21:29:18,645 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22201 conditions, 3924 events. 2443/3924 cut-off events. For 153979/153987 co-relation queries the response was YES. Maximal size of possible extension queue 212. Compared 22695 event pairs, 609 based on Foata normal form. 20/3942 useless extension candidates. Maximal degree in co-relation 22130. Up to 3127 conditions per place. [2024-06-27 21:29:18,656 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 139 selfloop transitions, 58 changer transitions 0/202 dead transitions. [2024-06-27 21:29:18,656 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 159 places, 202 transitions, 2131 flow [2024-06-27 21:29:18,657 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 21:29:18,657 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 21:29:18,657 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 151 transitions. [2024-06-27 21:29:18,658 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.438953488372093 [2024-06-27 21:29:18,658 INFO L175 Difference]: Start difference. First operand has 152 places, 160 transitions, 1563 flow. Second operand 8 states and 151 transitions. [2024-06-27 21:29:18,658 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 159 places, 202 transitions, 2131 flow [2024-06-27 21:29:18,770 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 151 places, 202 transitions, 1971 flow, removed 18 selfloop flow, removed 8 redundant places. [2024-06-27 21:29:18,772 INFO L231 Difference]: Finished difference. Result has 152 places, 161 transitions, 1567 flow [2024-06-27 21:29:18,772 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1403, PETRI_DIFFERENCE_MINUEND_PLACES=144, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=160, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=57, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=102, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1567, PETRI_PLACES=152, PETRI_TRANSITIONS=161} [2024-06-27 21:29:18,773 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 108 predicate places. [2024-06-27 21:29:18,773 INFO L495 AbstractCegarLoop]: Abstraction has has 152 places, 161 transitions, 1567 flow [2024-06-27 21:29:18,773 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.5) internal successors, (95), 10 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) [2024-06-27 21:29:18,773 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:29:18,773 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:29:18,773 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2024-06-27 21:29:18,773 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:29:18,774 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:29:18,774 INFO L85 PathProgramCache]: Analyzing trace with hash -96734737, now seen corresponding path program 3 times [2024-06-27 21:29:18,774 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:29:18,774 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [192282635] [2024-06-27 21:29:18,774 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:29:18,774 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:29:18,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:29:21,543 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:29:21,543 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:29:21,544 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [192282635] [2024-06-27 21:29:21,545 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [192282635] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:29:21,545 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:29:21,545 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:29:21,546 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2073909835] [2024-06-27 21:29:21,546 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:29:21,546 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:29:21,546 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:29:21,555 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:29:21,555 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:29:21,587 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-27 21:29:21,587 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 152 places, 161 transitions, 1567 flow. Second operand has 10 states, 10 states have (on average 9.5) internal successors, (95), 10 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) [2024-06-27 21:29:21,587 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:29:21,588 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-27 21:29:21,588 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:29:23,059 INFO L124 PetriNetUnfolderBase]: 2423/3892 cut-off events. [2024-06-27 21:29:23,064 INFO L125 PetriNetUnfolderBase]: For 149310/149318 co-relation queries the response was YES. [2024-06-27 21:29:23,078 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21428 conditions, 3892 events. 2423/3892 cut-off events. For 149310/149318 co-relation queries the response was YES. Maximal size of possible extension queue 209. Compared 22398 event pairs, 560 based on Foata normal form. 20/3910 useless extension candidates. Maximal degree in co-relation 21356. Up to 2261 conditions per place. [2024-06-27 21:29:23,089 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 128 selfloop transitions, 67 changer transitions 0/200 dead transitions. [2024-06-27 21:29:23,089 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 158 places, 200 transitions, 2013 flow [2024-06-27 21:29:23,090 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 21:29:23,090 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 21:29:23,091 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 149 transitions. [2024-06-27 21:29:23,091 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4331395348837209 [2024-06-27 21:29:23,091 INFO L175 Difference]: Start difference. First operand has 152 places, 161 transitions, 1567 flow. Second operand 8 states and 149 transitions. [2024-06-27 21:29:23,091 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 158 places, 200 transitions, 2013 flow [2024-06-27 21:29:23,221 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 152 places, 200 transitions, 1865 flow, removed 17 selfloop flow, removed 6 redundant places. [2024-06-27 21:29:23,237 INFO L231 Difference]: Finished difference. Result has 153 places, 160 transitions, 1485 flow [2024-06-27 21:29:23,239 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1347, PETRI_DIFFERENCE_MINUEND_PLACES=145, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=160, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=67, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=93, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1485, PETRI_PLACES=153, PETRI_TRANSITIONS=160} [2024-06-27 21:29:23,239 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 109 predicate places. [2024-06-27 21:29:23,239 INFO L495 AbstractCegarLoop]: Abstraction has has 153 places, 160 transitions, 1485 flow [2024-06-27 21:29:23,240 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.5) internal successors, (95), 10 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) [2024-06-27 21:29:23,240 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:29:23,240 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:29:23,240 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2024-06-27 21:29:23,240 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:29:23,240 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:29:23,241 INFO L85 PathProgramCache]: Analyzing trace with hash -1944181611, now seen corresponding path program 2 times [2024-06-27 21:29:23,241 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:29:23,241 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1377015876] [2024-06-27 21:29:23,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:29:23,241 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:29:23,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:29:25,409 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:29:25,409 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:29:25,409 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1377015876] [2024-06-27 21:29:25,409 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1377015876] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:29:25,410 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:29:25,410 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 21:29:25,410 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2003800721] [2024-06-27 21:29:25,410 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:29:25,411 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 21:29:25,411 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:29:25,412 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 21:29:25,412 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-27 21:29:25,421 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-27 21:29:25,421 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 153 places, 160 transitions, 1485 flow. Second operand has 8 states, 8 states have (on average 10.0) internal successors, (80), 8 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:29:25,422 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:29:25,422 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-27 21:29:25,422 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:29:26,573 INFO L124 PetriNetUnfolderBase]: 2443/3930 cut-off events. [2024-06-27 21:29:26,573 INFO L125 PetriNetUnfolderBase]: For 148630/148630 co-relation queries the response was YES. [2024-06-27 21:29:26,593 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21667 conditions, 3930 events. 2443/3930 cut-off events. For 148630/148630 co-relation queries the response was YES. Maximal size of possible extension queue 212. Compared 22692 event pairs, 698 based on Foata normal form. 4/3934 useless extension candidates. Maximal degree in co-relation 21594. Up to 3771 conditions per place. [2024-06-27 21:29:26,606 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 159 selfloop transitions, 14 changer transitions 0/178 dead transitions. [2024-06-27 21:29:26,607 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 159 places, 178 transitions, 1907 flow [2024-06-27 21:29:26,607 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 21:29:26,608 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 21:29:26,608 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 111 transitions. [2024-06-27 21:29:26,608 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3687707641196013 [2024-06-27 21:29:26,608 INFO L175 Difference]: Start difference. First operand has 153 places, 160 transitions, 1485 flow. Second operand 7 states and 111 transitions. [2024-06-27 21:29:26,608 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 159 places, 178 transitions, 1907 flow [2024-06-27 21:29:26,722 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 151 places, 178 transitions, 1686 flow, removed 18 selfloop flow, removed 8 redundant places. [2024-06-27 21:29:26,725 INFO L231 Difference]: Finished difference. Result has 152 places, 163 transitions, 1334 flow [2024-06-27 21:29:26,725 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1264, PETRI_DIFFERENCE_MINUEND_PLACES=145, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=160, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=146, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1334, PETRI_PLACES=152, PETRI_TRANSITIONS=163} [2024-06-27 21:29:26,725 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 108 predicate places. [2024-06-27 21:29:26,725 INFO L495 AbstractCegarLoop]: Abstraction has has 152 places, 163 transitions, 1334 flow [2024-06-27 21:29:26,725 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.0) internal successors, (80), 8 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:29:26,726 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:29:26,726 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:29:26,726 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2024-06-27 21:29:26,726 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:29:26,727 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:29:26,727 INFO L85 PathProgramCache]: Analyzing trace with hash -1944627081, now seen corresponding path program 3 times [2024-06-27 21:29:26,730 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:29:26,730 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [386702722] [2024-06-27 21:29:26,730 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:29:26,730 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:29:26,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:29:28,958 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:29:28,958 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:29:28,958 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [386702722] [2024-06-27 21:29:28,958 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [386702722] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:29:28,958 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:29:28,958 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 21:29:28,959 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [549470183] [2024-06-27 21:29:28,959 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:29:28,959 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 21:29:28,964 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:29:28,964 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 21:29:28,965 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-27 21:29:28,981 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-27 21:29:28,981 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 152 places, 163 transitions, 1334 flow. Second operand has 8 states, 8 states have (on average 10.0) internal successors, (80), 8 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:29:28,981 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:29:28,982 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-27 21:29:28,982 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:29:30,267 INFO L124 PetriNetUnfolderBase]: 2431/3899 cut-off events. [2024-06-27 21:29:30,267 INFO L125 PetriNetUnfolderBase]: For 148276/148276 co-relation queries the response was YES. [2024-06-27 21:29:30,285 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20683 conditions, 3899 events. 2431/3899 cut-off events. For 148276/148276 co-relation queries the response was YES. Maximal size of possible extension queue 209. Compared 22444 event pairs, 693 based on Foata normal form. 4/3901 useless extension candidates. Maximal degree in co-relation 20611. Up to 3654 conditions per place. [2024-06-27 21:29:30,297 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 148 selfloop transitions, 29 changer transitions 0/182 dead transitions. [2024-06-27 21:29:30,297 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 158 places, 182 transitions, 1762 flow [2024-06-27 21:29:30,299 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 21:29:30,300 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 21:29:30,300 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 119 transitions. [2024-06-27 21:29:30,300 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3953488372093023 [2024-06-27 21:29:30,300 INFO L175 Difference]: Start difference. First operand has 152 places, 163 transitions, 1334 flow. Second operand 7 states and 119 transitions. [2024-06-27 21:29:30,300 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 158 places, 182 transitions, 1762 flow [2024-06-27 21:29:30,409 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 151 places, 182 transitions, 1686 flow, removed 16 selfloop flow, removed 7 redundant places. [2024-06-27 21:29:30,412 INFO L231 Difference]: Finished difference. Result has 152 places, 163 transitions, 1322 flow [2024-06-27 21:29:30,412 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1258, PETRI_DIFFERENCE_MINUEND_PLACES=145, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=163, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=134, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1322, PETRI_PLACES=152, PETRI_TRANSITIONS=163} [2024-06-27 21:29:30,412 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 108 predicate places. [2024-06-27 21:29:30,412 INFO L495 AbstractCegarLoop]: Abstraction has has 152 places, 163 transitions, 1322 flow [2024-06-27 21:29:30,412 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.0) internal successors, (80), 8 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:29:30,413 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:29:30,413 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:29:30,413 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2024-06-27 21:29:30,413 INFO L420 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:29:30,413 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:29:30,413 INFO L85 PathProgramCache]: Analyzing trace with hash -2121663493, now seen corresponding path program 1 times [2024-06-27 21:29:30,413 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:29:30,414 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2136319276] [2024-06-27 21:29:30,414 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:29:30,414 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:29:30,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:29:32,149 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:29:32,150 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:29:32,150 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2136319276] [2024-06-27 21:29:32,150 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2136319276] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:29:32,150 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:29:32,150 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 21:29:32,150 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [318635900] [2024-06-27 21:29:32,150 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:29:32,151 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 21:29:32,151 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:29:32,152 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 21:29:32,152 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-27 21:29:32,174 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-27 21:29:32,174 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 152 places, 163 transitions, 1322 flow. Second operand has 7 states, 7 states have (on average 11.285714285714286) internal successors, (79), 7 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:29:32,174 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:29:32,174 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-27 21:29:32,175 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:29:33,248 INFO L124 PetriNetUnfolderBase]: 2275/3747 cut-off events. [2024-06-27 21:29:33,249 INFO L125 PetriNetUnfolderBase]: For 126243/126246 co-relation queries the response was YES. [2024-06-27 21:29:33,266 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18822 conditions, 3747 events. 2275/3747 cut-off events. For 126243/126246 co-relation queries the response was YES. Maximal size of possible extension queue 211. Compared 22179 event pairs, 573 based on Foata normal form. 7/3743 useless extension candidates. Maximal degree in co-relation 18751. Up to 3425 conditions per place. [2024-06-27 21:29:33,277 INFO L140 encePairwiseOnDemand]: 35/43 looper letters, 152 selfloop transitions, 26 changer transitions 0/187 dead transitions. [2024-06-27 21:29:33,277 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 157 places, 187 transitions, 1853 flow [2024-06-27 21:29:33,278 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 21:29:33,278 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 21:29:33,278 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 114 transitions. [2024-06-27 21:29:33,279 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4418604651162791 [2024-06-27 21:29:33,279 INFO L175 Difference]: Start difference. First operand has 152 places, 163 transitions, 1322 flow. Second operand 6 states and 114 transitions. [2024-06-27 21:29:33,279 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 157 places, 187 transitions, 1853 flow [2024-06-27 21:29:33,389 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 151 places, 187 transitions, 1766 flow, removed 8 selfloop flow, removed 6 redundant places. [2024-06-27 21:29:33,391 INFO L231 Difference]: Finished difference. Result has 152 places, 166 transitions, 1326 flow [2024-06-27 21:29:33,391 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1235, PETRI_DIFFERENCE_MINUEND_PLACES=146, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=163, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=140, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1326, PETRI_PLACES=152, PETRI_TRANSITIONS=166} [2024-06-27 21:29:33,391 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 108 predicate places. [2024-06-27 21:29:33,391 INFO L495 AbstractCegarLoop]: Abstraction has has 152 places, 166 transitions, 1326 flow [2024-06-27 21:29:33,392 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 11.285714285714286) internal successors, (79), 7 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:29:33,392 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:29:33,392 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:29:33,392 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2024-06-27 21:29:33,392 INFO L420 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:29:33,392 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:29:33,392 INFO L85 PathProgramCache]: Analyzing trace with hash 690676697, now seen corresponding path program 2 times [2024-06-27 21:29:33,393 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:29:33,393 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1510029034] [2024-06-27 21:29:33,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:29:33,393 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:29:33,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:29:35,490 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:29:35,490 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:29:35,490 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1510029034] [2024-06-27 21:29:35,490 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1510029034] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:29:35,490 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:29:35,490 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 21:29:35,491 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1495871244] [2024-06-27 21:29:35,491 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:29:35,491 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 21:29:35,491 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:29:35,491 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 21:29:35,491 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-27 21:29:35,519 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-27 21:29:35,520 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 152 places, 166 transitions, 1326 flow. Second operand has 8 states, 8 states have (on average 11.0) internal successors, (88), 8 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) [2024-06-27 21:29:35,520 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:29:35,520 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-27 21:29:35,520 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:29:36,808 INFO L124 PetriNetUnfolderBase]: 2263/3731 cut-off events. [2024-06-27 21:29:36,808 INFO L125 PetriNetUnfolderBase]: For 127363/127366 co-relation queries the response was YES. [2024-06-27 21:29:36,826 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18650 conditions, 3731 events. 2263/3731 cut-off events. For 127363/127366 co-relation queries the response was YES. Maximal size of possible extension queue 209. Compared 22122 event pairs, 588 based on Foata normal form. 7/3726 useless extension candidates. Maximal degree in co-relation 18578. Up to 3417 conditions per place. [2024-06-27 21:29:36,836 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 151 selfloop transitions, 29 changer transitions 0/189 dead transitions. [2024-06-27 21:29:36,836 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 158 places, 189 transitions, 1834 flow [2024-06-27 21:29:36,837 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 21:29:36,837 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 21:29:36,837 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 128 transitions. [2024-06-27 21:29:36,838 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42524916943521596 [2024-06-27 21:29:36,838 INFO L175 Difference]: Start difference. First operand has 152 places, 166 transitions, 1326 flow. Second operand 7 states and 128 transitions. [2024-06-27 21:29:36,838 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 158 places, 189 transitions, 1834 flow [2024-06-27 21:29:36,929 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 154 places, 189 transitions, 1758 flow, removed 9 selfloop flow, removed 4 redundant places. [2024-06-27 21:29:36,931 INFO L231 Difference]: Finished difference. Result has 155 places, 166 transitions, 1314 flow [2024-06-27 21:29:36,932 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1250, PETRI_DIFFERENCE_MINUEND_PLACES=148, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=166, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=137, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1314, PETRI_PLACES=155, PETRI_TRANSITIONS=166} [2024-06-27 21:29:36,933 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 111 predicate places. [2024-06-27 21:29:36,933 INFO L495 AbstractCegarLoop]: Abstraction has has 155 places, 166 transitions, 1314 flow [2024-06-27 21:29:36,933 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.0) internal successors, (88), 8 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) [2024-06-27 21:29:36,933 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:29:36,933 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:29:36,933 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2024-06-27 21:29:36,934 INFO L420 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:29:36,934 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:29:36,934 INFO L85 PathProgramCache]: Analyzing trace with hash 1912631115, now seen corresponding path program 3 times [2024-06-27 21:29:36,934 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:29:36,934 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1208519251] [2024-06-27 21:29:36,934 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:29:36,934 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:29:36,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:29:38,690 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:29:38,690 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:29:38,690 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1208519251] [2024-06-27 21:29:38,691 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1208519251] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:29:38,691 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:29:38,691 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 21:29:38,691 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1259544004] [2024-06-27 21:29:38,691 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:29:38,691 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 21:29:38,691 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:29:38,692 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 21:29:38,692 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-27 21:29:38,726 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-27 21:29:38,726 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 155 places, 166 transitions, 1314 flow. Second operand has 7 states, 7 states have (on average 11.285714285714286) internal successors, (79), 7 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:29:38,727 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:29:38,727 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-27 21:29:38,727 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:29:39,664 INFO L124 PetriNetUnfolderBase]: 2262/3737 cut-off events. [2024-06-27 21:29:39,665 INFO L125 PetriNetUnfolderBase]: For 130082/130083 co-relation queries the response was YES. [2024-06-27 21:29:39,683 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18565 conditions, 3737 events. 2262/3737 cut-off events. For 130082/130083 co-relation queries the response was YES. Maximal size of possible extension queue 207. Compared 22232 event pairs, 600 based on Foata normal form. 7/3735 useless extension candidates. Maximal degree in co-relation 18493. Up to 3488 conditions per place. [2024-06-27 21:29:39,694 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 157 selfloop transitions, 16 changer transitions 0/182 dead transitions. [2024-06-27 21:29:39,694 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 161 places, 182 transitions, 1700 flow [2024-06-27 21:29:39,695 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 21:29:39,695 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 21:29:39,695 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 118 transitions. [2024-06-27 21:29:39,695 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3920265780730897 [2024-06-27 21:29:39,695 INFO L175 Difference]: Start difference. First operand has 155 places, 166 transitions, 1314 flow. Second operand 7 states and 118 transitions. [2024-06-27 21:29:39,695 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 161 places, 182 transitions, 1700 flow [2024-06-27 21:29:39,837 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 152 places, 182 transitions, 1588 flow, removed 13 selfloop flow, removed 9 redundant places. [2024-06-27 21:29:39,839 INFO L231 Difference]: Finished difference. Result has 153 places, 166 transitions, 1240 flow [2024-06-27 21:29:39,852 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1202, PETRI_DIFFERENCE_MINUEND_PLACES=146, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=166, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=150, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1240, PETRI_PLACES=153, PETRI_TRANSITIONS=166} [2024-06-27 21:29:39,852 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 109 predicate places. [2024-06-27 21:29:39,852 INFO L495 AbstractCegarLoop]: Abstraction has has 153 places, 166 transitions, 1240 flow [2024-06-27 21:29:39,853 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 11.285714285714286) internal successors, (79), 7 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:29:39,853 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:29:39,853 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:29:39,853 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2024-06-27 21:29:39,853 INFO L420 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:29:39,853 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:29:39,853 INFO L85 PathProgramCache]: Analyzing trace with hash 1490143089, now seen corresponding path program 1 times [2024-06-27 21:29:39,854 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:29:39,854 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1107623654] [2024-06-27 21:29:39,854 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:29:39,854 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:29:39,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:29:42,864 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:29:42,865 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:29:42,865 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1107623654] [2024-06-27 21:29:42,865 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1107623654] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:29:42,865 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:29:42,865 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:29:42,865 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1840493192] [2024-06-27 21:29:42,865 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:29:42,866 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:29:42,870 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:29:42,871 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:29:42,871 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:29:42,906 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-27 21:29:42,906 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 153 places, 166 transitions, 1240 flow. Second operand has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:29:42,906 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:29:42,906 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-27 21:29:42,907 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:29:44,044 INFO L124 PetriNetUnfolderBase]: 2420/3901 cut-off events. [2024-06-27 21:29:44,044 INFO L125 PetriNetUnfolderBase]: For 155818/155818 co-relation queries the response was YES. [2024-06-27 21:29:44,063 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20139 conditions, 3901 events. 2420/3901 cut-off events. For 155818/155818 co-relation queries the response was YES. Maximal size of possible extension queue 206. Compared 22467 event pairs, 677 based on Foata normal form. 2/3903 useless extension candidates. Maximal degree in co-relation 20069. Up to 3752 conditions per place. [2024-06-27 21:29:44,076 INFO L140 encePairwiseOnDemand]: 35/43 looper letters, 164 selfloop transitions, 13 changer transitions 0/182 dead transitions. [2024-06-27 21:29:44,076 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 159 places, 182 transitions, 1654 flow [2024-06-27 21:29:44,077 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 21:29:44,077 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 21:29:44,077 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 109 transitions. [2024-06-27 21:29:44,077 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36212624584717606 [2024-06-27 21:29:44,077 INFO L175 Difference]: Start difference. First operand has 153 places, 166 transitions, 1240 flow. Second operand 7 states and 109 transitions. [2024-06-27 21:29:44,077 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 159 places, 182 transitions, 1654 flow [2024-06-27 21:29:44,193 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 153 places, 182 transitions, 1622 flow, removed 0 selfloop flow, removed 6 redundant places. [2024-06-27 21:29:44,195 INFO L231 Difference]: Finished difference. Result has 154 places, 168 transitions, 1267 flow [2024-06-27 21:29:44,195 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1208, PETRI_DIFFERENCE_MINUEND_PLACES=147, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=166, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=153, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1267, PETRI_PLACES=154, PETRI_TRANSITIONS=168} [2024-06-27 21:29:44,196 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 110 predicate places. [2024-06-27 21:29:44,196 INFO L495 AbstractCegarLoop]: Abstraction has has 154 places, 168 transitions, 1267 flow [2024-06-27 21:29:44,196 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:29:44,196 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:29:44,196 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:29:44,196 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2024-06-27 21:29:44,197 INFO L420 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:29:44,197 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:29:44,197 INFO L85 PathProgramCache]: Analyzing trace with hash -553607634, now seen corresponding path program 1 times [2024-06-27 21:29:44,197 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:29:44,197 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [540307205] [2024-06-27 21:29:44,197 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:29:44,197 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:29:44,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:29:46,085 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:29:46,086 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:29:46,086 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [540307205] [2024-06-27 21:29:46,086 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [540307205] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:29:46,086 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:29:46,086 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 21:29:46,086 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1438085420] [2024-06-27 21:29:46,086 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:29:46,087 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 21:29:46,087 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:29:46,087 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 21:29:46,088 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-27 21:29:46,104 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-27 21:29:46,105 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 154 places, 168 transitions, 1267 flow. Second operand has 8 states, 8 states have (on average 10.0) internal successors, (80), 8 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:29:46,105 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:29:46,105 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-27 21:29:46,105 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:29:47,518 INFO L124 PetriNetUnfolderBase]: 2433/3933 cut-off events. [2024-06-27 21:29:47,518 INFO L125 PetriNetUnfolderBase]: For 162607/162609 co-relation queries the response was YES. [2024-06-27 21:29:47,536 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20520 conditions, 3933 events. 2433/3933 cut-off events. For 162607/162609 co-relation queries the response was YES. Maximal size of possible extension queue 208. Compared 22784 event pairs, 611 based on Foata normal form. 3/3936 useless extension candidates. Maximal degree in co-relation 20449. Up to 3483 conditions per place. [2024-06-27 21:29:47,548 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 165 selfloop transitions, 51 changer transitions 0/221 dead transitions. [2024-06-27 21:29:47,548 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 160 places, 221 transitions, 2179 flow [2024-06-27 21:29:47,549 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 21:29:47,549 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 21:29:47,549 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 131 transitions. [2024-06-27 21:29:47,549 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43521594684385384 [2024-06-27 21:29:47,549 INFO L175 Difference]: Start difference. First operand has 154 places, 168 transitions, 1267 flow. Second operand 7 states and 131 transitions. [2024-06-27 21:29:47,549 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 160 places, 221 transitions, 2179 flow [2024-06-27 21:29:47,687 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 155 places, 221 transitions, 2136 flow, removed 10 selfloop flow, removed 5 redundant places. [2024-06-27 21:29:47,689 INFO L231 Difference]: Finished difference. Result has 159 places, 190 transitions, 1602 flow [2024-06-27 21:29:47,689 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1224, PETRI_DIFFERENCE_MINUEND_PLACES=149, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=168, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=123, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1602, PETRI_PLACES=159, PETRI_TRANSITIONS=190} [2024-06-27 21:29:47,692 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 115 predicate places. [2024-06-27 21:29:47,693 INFO L495 AbstractCegarLoop]: Abstraction has has 159 places, 190 transitions, 1602 flow [2024-06-27 21:29:47,693 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.0) internal successors, (80), 8 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:29:47,693 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:29:47,693 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:29:47,693 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2024-06-27 21:29:47,693 INFO L420 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:29:47,694 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:29:47,694 INFO L85 PathProgramCache]: Analyzing trace with hash 833665194, now seen corresponding path program 2 times [2024-06-27 21:29:47,694 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:29:47,694 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [941342405] [2024-06-27 21:29:47,694 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:29:47,694 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:29:47,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:29:49,728 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:29:49,728 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:29:49,728 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [941342405] [2024-06-27 21:29:49,728 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [941342405] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:29:49,728 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:29:49,729 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 21:29:49,729 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1487762623] [2024-06-27 21:29:49,729 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:29:49,729 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 21:29:49,729 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:29:49,729 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 21:29:49,729 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-27 21:29:49,741 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-27 21:29:49,741 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 159 places, 190 transitions, 1602 flow. Second operand has 8 states, 8 states have (on average 10.0) internal successors, (80), 8 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:29:49,741 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:29:49,742 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-27 21:29:49,742 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:29:50,870 INFO L124 PetriNetUnfolderBase]: 2475/3974 cut-off events. [2024-06-27 21:29:50,870 INFO L125 PetriNetUnfolderBase]: For 177959/177959 co-relation queries the response was YES. [2024-06-27 21:29:50,891 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22093 conditions, 3974 events. 2475/3974 cut-off events. For 177959/177959 co-relation queries the response was YES. Maximal size of possible extension queue 212. Compared 22963 event pairs, 676 based on Foata normal form. 2/3976 useless extension candidates. Maximal degree in co-relation 22018. Up to 3747 conditions per place. [2024-06-27 21:29:50,905 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 188 selfloop transitions, 35 changer transitions 0/228 dead transitions. [2024-06-27 21:29:50,905 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 166 places, 228 transitions, 2385 flow [2024-06-27 21:29:50,906 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 21:29:50,906 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 21:29:50,907 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 136 transitions. [2024-06-27 21:29:50,907 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3953488372093023 [2024-06-27 21:29:50,907 INFO L175 Difference]: Start difference. First operand has 159 places, 190 transitions, 1602 flow. Second operand 8 states and 136 transitions. [2024-06-27 21:29:50,907 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 166 places, 228 transitions, 2385 flow [2024-06-27 21:29:51,098 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 165 places, 228 transitions, 2337 flow, removed 23 selfloop flow, removed 1 redundant places. [2024-06-27 21:29:51,100 INFO L231 Difference]: Finished difference. Result has 167 places, 202 transitions, 1807 flow [2024-06-27 21:29:51,101 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1560, PETRI_DIFFERENCE_MINUEND_PLACES=158, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=190, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=157, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1807, PETRI_PLACES=167, PETRI_TRANSITIONS=202} [2024-06-27 21:29:51,101 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 123 predicate places. [2024-06-27 21:29:51,101 INFO L495 AbstractCegarLoop]: Abstraction has has 167 places, 202 transitions, 1807 flow [2024-06-27 21:29:51,101 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.0) internal successors, (80), 8 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:29:51,101 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:29:51,102 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:29:51,102 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2024-06-27 21:29:51,102 INFO L420 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:29:51,102 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:29:51,102 INFO L85 PathProgramCache]: Analyzing trace with hash 55597390, now seen corresponding path program 3 times [2024-06-27 21:29:51,102 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:29:51,102 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [120268187] [2024-06-27 21:29:51,102 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:29:51,103 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:29:51,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:29:53,180 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:29:53,180 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:29:53,180 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [120268187] [2024-06-27 21:29:53,180 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [120268187] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:29:53,180 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:29:53,180 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 21:29:53,181 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1056590482] [2024-06-27 21:29:53,181 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:29:53,181 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 21:29:53,181 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:29:53,181 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 21:29:53,181 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-27 21:29:53,198 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-27 21:29:53,199 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 167 places, 202 transitions, 1807 flow. Second operand has 8 states, 8 states have (on average 10.0) internal successors, (80), 8 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:29:53,199 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:29:53,199 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-27 21:29:53,199 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:29:54,396 INFO L124 PetriNetUnfolderBase]: 2480/3986 cut-off events. [2024-06-27 21:29:54,397 INFO L125 PetriNetUnfolderBase]: For 185251/185253 co-relation queries the response was YES. [2024-06-27 21:29:54,417 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22828 conditions, 3986 events. 2480/3986 cut-off events. For 185251/185253 co-relation queries the response was YES. Maximal size of possible extension queue 212. Compared 22927 event pairs, 649 based on Foata normal form. 3/3988 useless extension candidates. Maximal degree in co-relation 22749. Up to 3535 conditions per place. [2024-06-27 21:29:54,430 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 166 selfloop transitions, 65 changer transitions 0/236 dead transitions. [2024-06-27 21:29:54,430 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 173 places, 236 transitions, 2770 flow [2024-06-27 21:29:54,431 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 21:29:54,431 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 21:29:54,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 126 transitions. [2024-06-27 21:29:54,431 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4186046511627907 [2024-06-27 21:29:54,431 INFO L175 Difference]: Start difference. First operand has 167 places, 202 transitions, 1807 flow. Second operand 7 states and 126 transitions. [2024-06-27 21:29:54,431 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 173 places, 236 transitions, 2770 flow [2024-06-27 21:29:54,635 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 169 places, 236 transitions, 2661 flow, removed 40 selfloop flow, removed 4 redundant places. [2024-06-27 21:29:54,638 INFO L231 Difference]: Finished difference. Result has 171 places, 211 transitions, 1995 flow [2024-06-27 21:29:54,638 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1698, PETRI_DIFFERENCE_MINUEND_PLACES=163, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=202, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=57, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=143, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1995, PETRI_PLACES=171, PETRI_TRANSITIONS=211} [2024-06-27 21:29:54,639 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 127 predicate places. [2024-06-27 21:29:54,639 INFO L495 AbstractCegarLoop]: Abstraction has has 171 places, 211 transitions, 1995 flow [2024-06-27 21:29:54,639 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.0) internal successors, (80), 8 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:29:54,639 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:29:54,639 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:29:54,639 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2024-06-27 21:29:54,639 INFO L420 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:29:54,640 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:29:54,640 INFO L85 PathProgramCache]: Analyzing trace with hash -1343346518, now seen corresponding path program 4 times [2024-06-27 21:29:54,640 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:29:54,640 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1306818501] [2024-06-27 21:29:54,640 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:29:54,640 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:29:54,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:29:56,663 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:29:56,663 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:29:56,663 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1306818501] [2024-06-27 21:29:56,663 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1306818501] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:29:56,663 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:29:56,664 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 21:29:56,664 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2060719489] [2024-06-27 21:29:56,664 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:29:56,664 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 21:29:56,664 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:29:56,665 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 21:29:56,665 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-27 21:29:56,676 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-27 21:29:56,677 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 171 places, 211 transitions, 1995 flow. Second operand has 8 states, 8 states have (on average 10.0) internal successors, (80), 8 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:29:56,677 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:29:56,677 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-27 21:29:56,677 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:29:58,067 INFO L124 PetriNetUnfolderBase]: 2485/3995 cut-off events. [2024-06-27 21:29:58,067 INFO L125 PetriNetUnfolderBase]: For 194322/194324 co-relation queries the response was YES. [2024-06-27 21:29:58,084 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23351 conditions, 3995 events. 2485/3995 cut-off events. For 194322/194324 co-relation queries the response was YES. Maximal size of possible extension queue 213. Compared 23065 event pairs, 647 based on Foata normal form. 3/3997 useless extension candidates. Maximal degree in co-relation 23269. Up to 3539 conditions per place. [2024-06-27 21:29:58,095 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 160 selfloop transitions, 70 changer transitions 0/235 dead transitions. [2024-06-27 21:29:58,096 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 177 places, 235 transitions, 2785 flow [2024-06-27 21:29:58,096 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 21:29:58,096 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 21:29:58,097 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 121 transitions. [2024-06-27 21:29:58,097 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4019933554817276 [2024-06-27 21:29:58,097 INFO L175 Difference]: Start difference. First operand has 171 places, 211 transitions, 1995 flow. Second operand 7 states and 121 transitions. [2024-06-27 21:29:58,097 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 177 places, 235 transitions, 2785 flow [2024-06-27 21:29:58,361 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 176 places, 235 transitions, 2717 flow, removed 33 selfloop flow, removed 1 redundant places. [2024-06-27 21:29:58,376 INFO L231 Difference]: Finished difference. Result has 177 places, 215 transitions, 2143 flow [2024-06-27 21:29:58,392 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1939, PETRI_DIFFERENCE_MINUEND_PLACES=170, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=211, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=66, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=145, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2143, PETRI_PLACES=177, PETRI_TRANSITIONS=215} [2024-06-27 21:29:58,392 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 133 predicate places. [2024-06-27 21:29:58,392 INFO L495 AbstractCegarLoop]: Abstraction has has 177 places, 215 transitions, 2143 flow [2024-06-27 21:29:58,393 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.0) internal successors, (80), 8 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:29:58,393 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:29:58,393 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:29:58,393 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2024-06-27 21:29:58,393 INFO L420 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:29:58,393 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:29:58,394 INFO L85 PathProgramCache]: Analyzing trace with hash -1066295604, now seen corresponding path program 5 times [2024-06-27 21:29:58,394 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:29:58,394 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1067909867] [2024-06-27 21:29:58,394 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:29:58,394 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:29:58,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:30:00,497 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:30:00,497 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:30:00,497 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1067909867] [2024-06-27 21:30:00,497 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1067909867] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:30:00,498 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:30:00,498 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 21:30:00,498 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [275485584] [2024-06-27 21:30:00,498 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:30:00,498 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 21:30:00,498 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:30:00,499 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 21:30:00,499 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-27 21:30:00,503 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-27 21:30:00,503 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 177 places, 215 transitions, 2143 flow. Second operand has 8 states, 8 states have (on average 10.0) internal successors, (80), 8 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:30:00,503 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:30:00,503 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-27 21:30:00,503 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:30:01,768 INFO L124 PetriNetUnfolderBase]: 2519/4027 cut-off events. [2024-06-27 21:30:01,769 INFO L125 PetriNetUnfolderBase]: For 206828/206828 co-relation queries the response was YES. [2024-06-27 21:30:01,793 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24137 conditions, 4027 events. 2519/4027 cut-off events. For 206828/206828 co-relation queries the response was YES. Maximal size of possible extension queue 218. Compared 23217 event pairs, 683 based on Foata normal form. 2/4027 useless extension candidates. Maximal degree in co-relation 24052. Up to 3764 conditions per place. [2024-06-27 21:30:01,809 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 189 selfloop transitions, 52 changer transitions 0/246 dead transitions. [2024-06-27 21:30:01,809 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 185 places, 246 transitions, 3059 flow [2024-06-27 21:30:01,828 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 21:30:01,829 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 21:30:01,838 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 147 transitions. [2024-06-27 21:30:01,839 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3798449612403101 [2024-06-27 21:30:01,839 INFO L175 Difference]: Start difference. First operand has 177 places, 215 transitions, 2143 flow. Second operand 9 states and 147 transitions. [2024-06-27 21:30:01,839 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 185 places, 246 transitions, 3059 flow [2024-06-27 21:30:02,130 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 182 places, 246 transitions, 2899 flow, removed 28 selfloop flow, removed 3 redundant places. [2024-06-27 21:30:02,133 INFO L231 Difference]: Finished difference. Result has 185 places, 225 transitions, 2285 flow [2024-06-27 21:30:02,133 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1995, PETRI_DIFFERENCE_MINUEND_PLACES=174, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=215, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=44, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=165, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2285, PETRI_PLACES=185, PETRI_TRANSITIONS=225} [2024-06-27 21:30:02,134 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 141 predicate places. [2024-06-27 21:30:02,134 INFO L495 AbstractCegarLoop]: Abstraction has has 185 places, 225 transitions, 2285 flow [2024-06-27 21:30:02,134 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.0) internal successors, (80), 8 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:30:02,134 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:30:02,135 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:30:02,135 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2024-06-27 21:30:02,135 INFO L420 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:30:02,135 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:30:02,135 INFO L85 PathProgramCache]: Analyzing trace with hash -147236694, now seen corresponding path program 6 times [2024-06-27 21:30:02,135 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:30:02,135 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [739583735] [2024-06-27 21:30:02,136 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:30:02,136 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:30:02,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:30:04,502 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:30:04,502 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:30:04,502 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [739583735] [2024-06-27 21:30:04,502 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [739583735] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:30:04,502 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:30:04,502 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 21:30:04,503 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1783262256] [2024-06-27 21:30:04,503 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:30:04,503 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 21:30:04,503 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:30:04,503 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 21:30:04,503 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-27 21:30:04,509 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-27 21:30:04,509 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 185 places, 225 transitions, 2285 flow. Second operand has 8 states, 8 states have (on average 10.0) internal successors, (80), 8 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:30:04,509 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:30:04,509 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-27 21:30:04,509 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:30:05,638 INFO L124 PetriNetUnfolderBase]: 2516/4021 cut-off events. [2024-06-27 21:30:05,638 INFO L125 PetriNetUnfolderBase]: For 213924/213924 co-relation queries the response was YES. [2024-06-27 21:30:05,660 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24617 conditions, 4021 events. 2516/4021 cut-off events. For 213924/213924 co-relation queries the response was YES. Maximal size of possible extension queue 217. Compared 23148 event pairs, 683 based on Foata normal form. 1/4020 useless extension candidates. Maximal degree in co-relation 24529. Up to 3762 conditions per place. [2024-06-27 21:30:05,672 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 183 selfloop transitions, 54 changer transitions 0/242 dead transitions. [2024-06-27 21:30:05,673 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 192 places, 242 transitions, 2928 flow [2024-06-27 21:30:05,673 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 21:30:05,673 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 21:30:05,674 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 130 transitions. [2024-06-27 21:30:05,674 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37790697674418605 [2024-06-27 21:30:05,674 INFO L175 Difference]: Start difference. First operand has 185 places, 225 transitions, 2285 flow. Second operand 8 states and 130 transitions. [2024-06-27 21:30:05,674 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 192 places, 242 transitions, 2928 flow [2024-06-27 21:30:05,917 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 187 places, 242 transitions, 2758 flow, removed 58 selfloop flow, removed 5 redundant places. [2024-06-27 21:30:05,920 INFO L231 Difference]: Finished difference. Result has 188 places, 225 transitions, 2229 flow [2024-06-27 21:30:05,920 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2115, PETRI_DIFFERENCE_MINUEND_PLACES=180, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=225, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=54, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=171, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2229, PETRI_PLACES=188, PETRI_TRANSITIONS=225} [2024-06-27 21:30:05,920 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 144 predicate places. [2024-06-27 21:30:05,921 INFO L495 AbstractCegarLoop]: Abstraction has has 188 places, 225 transitions, 2229 flow [2024-06-27 21:30:05,921 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.0) internal successors, (80), 8 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:30:05,921 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:30:05,921 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:30:05,921 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2024-06-27 21:30:05,921 INFO L420 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:30:05,921 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:30:05,922 INFO L85 PathProgramCache]: Analyzing trace with hash 537632442, now seen corresponding path program 1 times [2024-06-27 21:30:05,922 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:30:05,922 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [849940756] [2024-06-27 21:30:05,922 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:30:05,922 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:30:05,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:30:08,103 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:30:08,103 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:30:08,103 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [849940756] [2024-06-27 21:30:08,103 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [849940756] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:30:08,104 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:30:08,104 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 21:30:08,104 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [346936167] [2024-06-27 21:30:08,104 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:30:08,104 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 21:30:08,104 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:30:08,105 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 21:30:08,105 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-27 21:30:08,118 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-27 21:30:08,118 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 188 places, 225 transitions, 2229 flow. Second operand has 8 states, 8 states have (on average 10.125) internal successors, (81), 8 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:30:08,118 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:30:08,118 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-27 21:30:08,119 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:30:09,457 INFO L124 PetriNetUnfolderBase]: 2558/4109 cut-off events. [2024-06-27 21:30:09,458 INFO L125 PetriNetUnfolderBase]: For 228300/228306 co-relation queries the response was YES. [2024-06-27 21:30:09,477 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25078 conditions, 4109 events. 2558/4109 cut-off events. For 228300/228306 co-relation queries the response was YES. Maximal size of possible extension queue 224. Compared 23780 event pairs, 616 based on Foata normal form. 8/4117 useless extension candidates. Maximal degree in co-relation 24989. Up to 3619 conditions per place. [2024-06-27 21:30:09,489 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 178 selfloop transitions, 81 changer transitions 0/264 dead transitions. [2024-06-27 21:30:09,489 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 194 places, 264 transitions, 3177 flow [2024-06-27 21:30:09,490 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 21:30:09,490 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 21:30:09,490 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 133 transitions. [2024-06-27 21:30:09,491 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4418604651162791 [2024-06-27 21:30:09,491 INFO L175 Difference]: Start difference. First operand has 188 places, 225 transitions, 2229 flow. Second operand 7 states and 133 transitions. [2024-06-27 21:30:09,491 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 194 places, 264 transitions, 3177 flow [2024-06-27 21:30:09,713 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 189 places, 264 transitions, 3093 flow, removed 1 selfloop flow, removed 5 redundant places. [2024-06-27 21:30:09,716 INFO L231 Difference]: Finished difference. Result has 190 places, 234 transitions, 2447 flow [2024-06-27 21:30:09,716 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2148, PETRI_DIFFERENCE_MINUEND_PLACES=183, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=225, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=72, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=153, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2447, PETRI_PLACES=190, PETRI_TRANSITIONS=234} [2024-06-27 21:30:09,716 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 146 predicate places. [2024-06-27 21:30:09,717 INFO L495 AbstractCegarLoop]: Abstraction has has 190 places, 234 transitions, 2447 flow [2024-06-27 21:30:09,717 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.125) internal successors, (81), 8 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:30:09,717 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:30:09,717 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:30:09,717 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2024-06-27 21:30:09,717 INFO L420 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:30:09,717 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:30:09,718 INFO L85 PathProgramCache]: Analyzing trace with hash 1567860794, now seen corresponding path program 2 times [2024-06-27 21:30:09,718 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:30:09,718 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [346858602] [2024-06-27 21:30:09,718 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:30:09,718 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:30:09,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:30:11,962 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:30:11,963 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:30:11,963 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [346858602] [2024-06-27 21:30:11,963 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [346858602] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:30:11,963 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:30:11,963 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:30:11,963 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1216193793] [2024-06-27 21:30:11,963 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:30:11,963 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:30:11,964 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:30:11,964 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:30:11,964 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:30:11,978 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-27 21:30:11,978 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 190 places, 234 transitions, 2447 flow. Second operand has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:30:11,978 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:30:11,978 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-27 21:30:11,979 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:30:13,606 INFO L124 PetriNetUnfolderBase]: 2568/4124 cut-off events. [2024-06-27 21:30:13,606 INFO L125 PetriNetUnfolderBase]: For 237281/237283 co-relation queries the response was YES. [2024-06-27 21:30:13,631 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25527 conditions, 4124 events. 2568/4124 cut-off events. For 237281/237283 co-relation queries the response was YES. Maximal size of possible extension queue 225. Compared 23865 event pairs, 621 based on Foata normal form. 4/4128 useless extension candidates. Maximal degree in co-relation 25437. Up to 3629 conditions per place. [2024-06-27 21:30:13,645 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 180 selfloop transitions, 81 changer transitions 0/266 dead transitions. [2024-06-27 21:30:13,646 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 197 places, 266 transitions, 3210 flow [2024-06-27 21:30:13,647 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 21:30:13,647 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 21:30:13,655 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 143 transitions. [2024-06-27 21:30:13,655 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41569767441860467 [2024-06-27 21:30:13,656 INFO L175 Difference]: Start difference. First operand has 190 places, 234 transitions, 2447 flow. Second operand 8 states and 143 transitions. [2024-06-27 21:30:13,656 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 197 places, 266 transitions, 3210 flow [2024-06-27 21:30:13,960 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 194 places, 266 transitions, 3094 flow, removed 17 selfloop flow, removed 3 redundant places. [2024-06-27 21:30:13,964 INFO L231 Difference]: Finished difference. Result has 195 places, 237 transitions, 2550 flow [2024-06-27 21:30:13,965 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2336, PETRI_DIFFERENCE_MINUEND_PLACES=187, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=234, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=78, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=156, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2550, PETRI_PLACES=195, PETRI_TRANSITIONS=237} [2024-06-27 21:30:13,965 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 151 predicate places. [2024-06-27 21:30:13,965 INFO L495 AbstractCegarLoop]: Abstraction has has 195 places, 237 transitions, 2550 flow [2024-06-27 21:30:13,965 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:30:13,965 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:30:13,966 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:30:13,966 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2024-06-27 21:30:13,966 INFO L420 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:30:13,967 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:30:13,967 INFO L85 PathProgramCache]: Analyzing trace with hash -319078148, now seen corresponding path program 1 times [2024-06-27 21:30:13,967 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:30:13,967 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1703135213] [2024-06-27 21:30:13,967 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:30:13,967 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:30:14,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:30:16,457 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:30:16,457 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:30:16,457 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1703135213] [2024-06-27 21:30:16,458 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1703135213] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:30:16,458 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:30:16,458 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:30:16,458 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1501528156] [2024-06-27 21:30:16,458 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:30:16,458 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:30:16,458 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:30:16,458 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:30:16,458 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:30:16,489 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-27 21:30:16,490 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 195 places, 237 transitions, 2550 flow. Second operand has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:30:16,490 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:30:16,490 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-27 21:30:16,490 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:30:17,904 INFO L124 PetriNetUnfolderBase]: 2594/4164 cut-off events. [2024-06-27 21:30:17,904 INFO L125 PetriNetUnfolderBase]: For 250052/250054 co-relation queries the response was YES. [2024-06-27 21:30:17,928 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26095 conditions, 4164 events. 2594/4164 cut-off events. For 250052/250054 co-relation queries the response was YES. Maximal size of possible extension queue 230. Compared 24042 event pairs, 650 based on Foata normal form. 4/4168 useless extension candidates. Maximal degree in co-relation 26004. Up to 3419 conditions per place. [2024-06-27 21:30:17,941 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 189 selfloop transitions, 92 changer transitions 0/286 dead transitions. [2024-06-27 21:30:17,942 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 202 places, 286 transitions, 3622 flow [2024-06-27 21:30:17,942 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 21:30:17,942 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 21:30:17,942 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 150 transitions. [2024-06-27 21:30:17,943 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.436046511627907 [2024-06-27 21:30:17,943 INFO L175 Difference]: Start difference. First operand has 195 places, 237 transitions, 2550 flow. Second operand 8 states and 150 transitions. [2024-06-27 21:30:17,943 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 202 places, 286 transitions, 3622 flow [2024-06-27 21:30:18,279 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 196 places, 286 transitions, 3438 flow, removed 11 selfloop flow, removed 6 redundant places. [2024-06-27 21:30:18,282 INFO L231 Difference]: Finished difference. Result has 199 places, 252 transitions, 2826 flow [2024-06-27 21:30:18,283 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2366, PETRI_DIFFERENCE_MINUEND_PLACES=189, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=237, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=79, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=150, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2826, PETRI_PLACES=199, PETRI_TRANSITIONS=252} [2024-06-27 21:30:18,283 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 155 predicate places. [2024-06-27 21:30:18,283 INFO L495 AbstractCegarLoop]: Abstraction has has 199 places, 252 transitions, 2826 flow [2024-06-27 21:30:18,283 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:30:18,283 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:30:18,283 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:30:18,284 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57 [2024-06-27 21:30:18,284 INFO L420 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:30:18,284 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:30:18,284 INFO L85 PathProgramCache]: Analyzing trace with hash 74056726, now seen corresponding path program 2 times [2024-06-27 21:30:18,284 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:30:18,284 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2119198356] [2024-06-27 21:30:18,284 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:30:18,285 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:30:18,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:30:20,591 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:30:20,591 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:30:20,591 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2119198356] [2024-06-27 21:30:20,592 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2119198356] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:30:20,592 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:30:20,592 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:30:20,592 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1614012497] [2024-06-27 21:30:20,592 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:30:20,592 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:30:20,593 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:30:20,593 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:30:20,593 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:30:20,623 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-27 21:30:20,624 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 199 places, 252 transitions, 2826 flow. Second operand has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:30:20,624 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:30:20,624 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-27 21:30:20,624 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:30:22,385 INFO L124 PetriNetUnfolderBase]: 2710/4323 cut-off events. [2024-06-27 21:30:22,385 INFO L125 PetriNetUnfolderBase]: For 284660/284660 co-relation queries the response was YES. [2024-06-27 21:30:22,413 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28796 conditions, 4323 events. 2710/4323 cut-off events. For 284660/284660 co-relation queries the response was YES. Maximal size of possible extension queue 241. Compared 24974 event pairs, 677 based on Foata normal form. 4/4327 useless extension candidates. Maximal degree in co-relation 28702. Up to 3912 conditions per place. [2024-06-27 21:30:22,428 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 238 selfloop transitions, 62 changer transitions 0/305 dead transitions. [2024-06-27 21:30:22,429 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 208 places, 305 transitions, 4105 flow [2024-06-27 21:30:22,429 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 21:30:22,430 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 21:30:22,430 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 173 transitions. [2024-06-27 21:30:22,430 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40232558139534885 [2024-06-27 21:30:22,430 INFO L175 Difference]: Start difference. First operand has 199 places, 252 transitions, 2826 flow. Second operand 10 states and 173 transitions. [2024-06-27 21:30:22,430 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 208 places, 305 transitions, 4105 flow [2024-06-27 21:30:22,734 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 205 places, 305 transitions, 4001 flow, removed 34 selfloop flow, removed 3 redundant places. [2024-06-27 21:30:22,738 INFO L231 Difference]: Finished difference. Result has 207 places, 266 transitions, 3113 flow [2024-06-27 21:30:22,738 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2736, PETRI_DIFFERENCE_MINUEND_PLACES=196, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=252, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=52, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=194, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3113, PETRI_PLACES=207, PETRI_TRANSITIONS=266} [2024-06-27 21:30:22,739 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 163 predicate places. [2024-06-27 21:30:22,739 INFO L495 AbstractCegarLoop]: Abstraction has has 207 places, 266 transitions, 3113 flow [2024-06-27 21:30:22,739 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:30:22,739 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:30:22,739 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:30:22,739 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58 [2024-06-27 21:30:22,739 INFO L420 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:30:22,740 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:30:22,740 INFO L85 PathProgramCache]: Analyzing trace with hash 73819576, now seen corresponding path program 3 times [2024-06-27 21:30:22,740 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:30:22,740 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1445095210] [2024-06-27 21:30:22,740 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:30:22,740 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:30:22,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:30:24,978 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:30:24,978 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:30:24,978 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1445095210] [2024-06-27 21:30:24,979 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1445095210] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:30:24,979 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:30:24,979 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:30:24,979 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1555212995] [2024-06-27 21:30:24,979 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:30:24,979 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:30:24,979 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:30:24,980 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:30:24,980 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:30:25,000 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-27 21:30:25,000 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 207 places, 266 transitions, 3113 flow. Second operand has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:30:25,000 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:30:25,000 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-27 21:30:25,000 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:30:26,420 INFO L124 PetriNetUnfolderBase]: 2698/4295 cut-off events. [2024-06-27 21:30:26,421 INFO L125 PetriNetUnfolderBase]: For 290844/290844 co-relation queries the response was YES. [2024-06-27 21:30:26,446 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29295 conditions, 4295 events. 2698/4295 cut-off events. For 290844/290844 co-relation queries the response was YES. Maximal size of possible extension queue 239. Compared 24707 event pairs, 676 based on Foata normal form. 4/4299 useless extension candidates. Maximal degree in co-relation 29198. Up to 3906 conditions per place. [2024-06-27 21:30:26,461 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 236 selfloop transitions, 64 changer transitions 0/305 dead transitions. [2024-06-27 21:30:26,461 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 215 places, 305 transitions, 4089 flow [2024-06-27 21:30:26,462 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 21:30:26,462 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 21:30:26,462 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 160 transitions. [2024-06-27 21:30:26,462 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4134366925064599 [2024-06-27 21:30:26,462 INFO L175 Difference]: Start difference. First operand has 207 places, 266 transitions, 3113 flow. Second operand 9 states and 160 transitions. [2024-06-27 21:30:26,462 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 215 places, 305 transitions, 4089 flow [2024-06-27 21:30:26,807 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 209 places, 305 transitions, 3896 flow, removed 67 selfloop flow, removed 6 redundant places. [2024-06-27 21:30:26,810 INFO L231 Difference]: Finished difference. Result has 210 places, 270 transitions, 3168 flow [2024-06-27 21:30:26,810 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2930, PETRI_DIFFERENCE_MINUEND_PLACES=201, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=266, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=60, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=204, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3168, PETRI_PLACES=210, PETRI_TRANSITIONS=270} [2024-06-27 21:30:26,811 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 166 predicate places. [2024-06-27 21:30:26,811 INFO L495 AbstractCegarLoop]: Abstraction has has 210 places, 270 transitions, 3168 flow [2024-06-27 21:30:26,811 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:30:26,811 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:30:26,811 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:30:26,811 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59 [2024-06-27 21:30:26,812 INFO L420 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:30:26,812 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:30:26,812 INFO L85 PathProgramCache]: Analyzing trace with hash -141946814, now seen corresponding path program 3 times [2024-06-27 21:30:26,812 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:30:26,812 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [598651415] [2024-06-27 21:30:26,812 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:30:26,812 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:30:26,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:30:28,863 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:30:28,863 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:30:28,863 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [598651415] [2024-06-27 21:30:28,863 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [598651415] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:30:28,864 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:30:28,864 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 21:30:28,864 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1405559642] [2024-06-27 21:30:28,864 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:30:28,864 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 21:30:28,864 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:30:28,865 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 21:30:28,865 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-27 21:30:28,878 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-27 21:30:28,879 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 210 places, 270 transitions, 3168 flow. Second operand has 8 states, 8 states have (on average 10.125) internal successors, (81), 8 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:30:28,879 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:30:28,879 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-27 21:30:28,879 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:30:30,280 INFO L124 PetriNetUnfolderBase]: 2686/4279 cut-off events. [2024-06-27 21:30:30,280 INFO L125 PetriNetUnfolderBase]: For 293957/293957 co-relation queries the response was YES. [2024-06-27 21:30:30,304 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29083 conditions, 4279 events. 2686/4279 cut-off events. For 293957/293957 co-relation queries the response was YES. Maximal size of possible extension queue 238. Compared 24679 event pairs, 696 based on Foata normal form. 4/4283 useless extension candidates. Maximal degree in co-relation 28984. Up to 4046 conditions per place. [2024-06-27 21:30:30,318 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 255 selfloop transitions, 35 changer transitions 0/295 dead transitions. [2024-06-27 21:30:30,319 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 217 places, 295 transitions, 3856 flow [2024-06-27 21:30:30,320 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 21:30:30,320 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 21:30:30,320 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 135 transitions. [2024-06-27 21:30:30,320 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39244186046511625 [2024-06-27 21:30:30,320 INFO L175 Difference]: Start difference. First operand has 210 places, 270 transitions, 3168 flow. Second operand 8 states and 135 transitions. [2024-06-27 21:30:30,320 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 217 places, 295 transitions, 3856 flow [2024-06-27 21:30:30,677 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 211 places, 295 transitions, 3658 flow, removed 47 selfloop flow, removed 6 redundant places. [2024-06-27 21:30:30,681 INFO L231 Difference]: Finished difference. Result has 212 places, 270 transitions, 3050 flow [2024-06-27 21:30:30,681 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2970, PETRI_DIFFERENCE_MINUEND_PLACES=204, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=270, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=235, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3050, PETRI_PLACES=212, PETRI_TRANSITIONS=270} [2024-06-27 21:30:30,681 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 168 predicate places. [2024-06-27 21:30:30,681 INFO L495 AbstractCegarLoop]: Abstraction has has 212 places, 270 transitions, 3050 flow [2024-06-27 21:30:30,685 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.125) internal successors, (81), 8 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:30:30,685 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:30:30,685 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:30:30,685 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60 [2024-06-27 21:30:30,685 INFO L420 AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:30:30,686 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:30:30,686 INFO L85 PathProgramCache]: Analyzing trace with hash -141700550, now seen corresponding path program 1 times [2024-06-27 21:30:30,686 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:30:30,686 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [130720454] [2024-06-27 21:30:30,686 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:30:30,686 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:30:30,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:30:34,035 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:30:34,036 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:30:34,036 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [130720454] [2024-06-27 21:30:34,036 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [130720454] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:30:34,036 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:30:34,036 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:30:34,036 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1970634099] [2024-06-27 21:30:34,037 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:30:34,037 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:30:34,037 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:30:34,037 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:30:34,037 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:30:34,066 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-27 21:30:34,066 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 212 places, 270 transitions, 3050 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:30:34,066 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:30:34,066 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-27 21:30:34,066 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:30:35,578 INFO L124 PetriNetUnfolderBase]: 2730/4347 cut-off events. [2024-06-27 21:30:35,578 INFO L125 PetriNetUnfolderBase]: For 316439/316439 co-relation queries the response was YES. [2024-06-27 21:30:35,606 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29329 conditions, 4347 events. 2730/4347 cut-off events. For 316439/316439 co-relation queries the response was YES. Maximal size of possible extension queue 242. Compared 25096 event pairs, 679 based on Foata normal form. 12/4359 useless extension candidates. Maximal degree in co-relation 29229. Up to 4026 conditions per place. [2024-06-27 21:30:35,622 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 262 selfloop transitions, 39 changer transitions 0/306 dead transitions. [2024-06-27 21:30:35,622 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 219 places, 306 transitions, 3854 flow [2024-06-27 21:30:35,623 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 21:30:35,623 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 21:30:35,623 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 142 transitions. [2024-06-27 21:30:35,623 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4127906976744186 [2024-06-27 21:30:35,623 INFO L175 Difference]: Start difference. First operand has 212 places, 270 transitions, 3050 flow. Second operand 8 states and 142 transitions. [2024-06-27 21:30:35,624 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 219 places, 306 transitions, 3854 flow [2024-06-27 21:30:35,956 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 212 places, 306 transitions, 3784 flow, removed 0 selfloop flow, removed 7 redundant places. [2024-06-27 21:30:35,960 INFO L231 Difference]: Finished difference. Result has 213 places, 271 transitions, 3082 flow [2024-06-27 21:30:35,960 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2980, PETRI_DIFFERENCE_MINUEND_PLACES=205, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=270, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=231, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3082, PETRI_PLACES=213, PETRI_TRANSITIONS=271} [2024-06-27 21:30:35,961 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 169 predicate places. [2024-06-27 21:30:35,961 INFO L495 AbstractCegarLoop]: Abstraction has has 213 places, 271 transitions, 3082 flow [2024-06-27 21:30:35,961 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:30:35,961 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:30:35,961 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:30:35,961 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61 [2024-06-27 21:30:35,962 INFO L420 AbstractCegarLoop]: === Iteration 63 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:30:35,962 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:30:35,962 INFO L85 PathProgramCache]: Analyzing trace with hash 922148094, now seen corresponding path program 4 times [2024-06-27 21:30:35,962 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:30:35,962 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1448548904] [2024-06-27 21:30:35,962 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:30:35,962 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:30:35,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:30:38,368 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:30:38,368 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:30:38,369 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1448548904] [2024-06-27 21:30:38,369 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1448548904] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:30:38,369 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:30:38,369 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:30:38,369 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [314430673] [2024-06-27 21:30:38,369 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:30:38,369 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:30:38,370 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:30:38,370 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:30:38,370 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:30:38,382 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-27 21:30:38,383 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 213 places, 271 transitions, 3082 flow. Second operand has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:30:38,383 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:30:38,383 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-27 21:30:38,383 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:30:40,071 INFO L124 PetriNetUnfolderBase]: 2740/4364 cut-off events. [2024-06-27 21:30:40,071 INFO L125 PetriNetUnfolderBase]: For 308732/308734 co-relation queries the response was YES. [2024-06-27 21:30:40,100 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29698 conditions, 4364 events. 2740/4364 cut-off events. For 308732/308734 co-relation queries the response was YES. Maximal size of possible extension queue 243. Compared 25179 event pairs, 695 based on Foata normal form. 4/4367 useless extension candidates. Maximal degree in co-relation 29597. Up to 3874 conditions per place. [2024-06-27 21:30:40,115 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 206 selfloop transitions, 88 changer transitions 0/299 dead transitions. [2024-06-27 21:30:40,115 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 220 places, 299 transitions, 3916 flow [2024-06-27 21:30:40,116 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 21:30:40,116 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 21:30:40,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 137 transitions. [2024-06-27 21:30:40,117 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39825581395348836 [2024-06-27 21:30:40,117 INFO L175 Difference]: Start difference. First operand has 213 places, 271 transitions, 3082 flow. Second operand 8 states and 137 transitions. [2024-06-27 21:30:40,117 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 220 places, 299 transitions, 3916 flow [2024-06-27 21:30:40,416 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 214 places, 299 transitions, 3836 flow, removed 3 selfloop flow, removed 6 redundant places. [2024-06-27 21:30:40,419 INFO L231 Difference]: Finished difference. Result has 215 places, 274 transitions, 3236 flow [2024-06-27 21:30:40,419 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3002, PETRI_DIFFERENCE_MINUEND_PLACES=207, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=271, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=85, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=186, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3236, PETRI_PLACES=215, PETRI_TRANSITIONS=274} [2024-06-27 21:30:40,420 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 171 predicate places. [2024-06-27 21:30:40,420 INFO L495 AbstractCegarLoop]: Abstraction has has 215 places, 274 transitions, 3236 flow [2024-06-27 21:30:40,420 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:30:40,420 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:30:40,420 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:30:40,420 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62 [2024-06-27 21:30:40,420 INFO L420 AbstractCegarLoop]: === Iteration 64 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:30:40,421 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:30:40,421 INFO L85 PathProgramCache]: Analyzing trace with hash 922148280, now seen corresponding path program 4 times [2024-06-27 21:30:40,421 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:30:40,421 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [885202291] [2024-06-27 21:30:40,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:30:40,421 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:30:40,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:30:42,727 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:30:42,728 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:30:42,728 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [885202291] [2024-06-27 21:30:42,728 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [885202291] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:30:42,728 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:30:42,728 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:30:42,728 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1578834285] [2024-06-27 21:30:42,729 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:30:42,729 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:30:42,729 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:30:42,732 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:30:42,732 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:30:42,748 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-27 21:30:42,748 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 215 places, 274 transitions, 3236 flow. Second operand has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:30:42,748 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:30:42,748 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-27 21:30:42,748 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:30:44,402 INFO L124 PetriNetUnfolderBase]: 2750/4380 cut-off events. [2024-06-27 21:30:44,403 INFO L125 PetriNetUnfolderBase]: For 319730/319732 co-relation queries the response was YES. [2024-06-27 21:30:44,431 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30152 conditions, 4380 events. 2750/4380 cut-off events. For 319730/319732 co-relation queries the response was YES. Maximal size of possible extension queue 245. Compared 25291 event pairs, 734 based on Foata normal form. 4/4383 useless extension candidates. Maximal degree in co-relation 30050. Up to 3596 conditions per place. [2024-06-27 21:30:44,447 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 193 selfloop transitions, 112 changer transitions 0/310 dead transitions. [2024-06-27 21:30:44,448 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 222 places, 310 transitions, 4440 flow [2024-06-27 21:30:44,448 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 21:30:44,448 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 21:30:44,449 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 145 transitions. [2024-06-27 21:30:44,449 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42151162790697677 [2024-06-27 21:30:44,449 INFO L175 Difference]: Start difference. First operand has 215 places, 274 transitions, 3236 flow. Second operand 8 states and 145 transitions. [2024-06-27 21:30:44,449 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 222 places, 310 transitions, 4440 flow [2024-06-27 21:30:44,821 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 216 places, 310 transitions, 4242 flow, removed 11 selfloop flow, removed 6 redundant places. [2024-06-27 21:30:44,825 INFO L231 Difference]: Finished difference. Result has 217 places, 280 transitions, 3410 flow [2024-06-27 21:30:44,826 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3038, PETRI_DIFFERENCE_MINUEND_PLACES=209, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=274, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=107, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=167, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3410, PETRI_PLACES=217, PETRI_TRANSITIONS=280} [2024-06-27 21:30:44,827 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 173 predicate places. [2024-06-27 21:30:44,827 INFO L495 AbstractCegarLoop]: Abstraction has has 217 places, 280 transitions, 3410 flow [2024-06-27 21:30:44,827 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:30:44,828 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:30:44,828 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:30:44,828 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63 [2024-06-27 21:30:44,828 INFO L420 AbstractCegarLoop]: === Iteration 65 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:30:44,828 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:30:44,828 INFO L85 PathProgramCache]: Analyzing trace with hash -1993181606, now seen corresponding path program 5 times [2024-06-27 21:30:44,828 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:30:44,829 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1218503873] [2024-06-27 21:30:44,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:30:44,829 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:30:44,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:30:46,820 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:30:46,820 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:30:46,820 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1218503873] [2024-06-27 21:30:46,820 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1218503873] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:30:46,820 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:30:46,820 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 21:30:46,820 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [350501589] [2024-06-27 21:30:46,820 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:30:46,821 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 21:30:46,821 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:30:46,821 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 21:30:46,821 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-27 21:30:46,831 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-27 21:30:46,832 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 217 places, 280 transitions, 3410 flow. Second operand has 8 states, 8 states have (on average 10.125) internal successors, (81), 8 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:30:46,832 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:30:46,832 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-27 21:30:46,832 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:30:48,426 INFO L124 PetriNetUnfolderBase]: 2760/4401 cut-off events. [2024-06-27 21:30:48,427 INFO L125 PetriNetUnfolderBase]: For 330835/330843 co-relation queries the response was YES. [2024-06-27 21:30:48,451 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30570 conditions, 4401 events. 2760/4401 cut-off events. For 330835/330843 co-relation queries the response was YES. Maximal size of possible extension queue 251. Compared 25477 event pairs, 657 based on Foata normal form. 10/4410 useless extension candidates. Maximal degree in co-relation 30467. Up to 3898 conditions per place. [2024-06-27 21:30:48,465 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 217 selfloop transitions, 88 changer transitions 0/310 dead transitions. [2024-06-27 21:30:48,465 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 223 places, 310 transitions, 4421 flow [2024-06-27 21:30:48,466 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 21:30:48,466 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 21:30:48,466 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 127 transitions. [2024-06-27 21:30:48,467 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4219269102990033 [2024-06-27 21:30:48,467 INFO L175 Difference]: Start difference. First operand has 217 places, 280 transitions, 3410 flow. Second operand 7 states and 127 transitions. [2024-06-27 21:30:48,467 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 223 places, 310 transitions, 4421 flow [2024-06-27 21:30:48,775 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 220 places, 310 transitions, 4299 flow, removed 36 selfloop flow, removed 3 redundant places. [2024-06-27 21:30:48,779 INFO L231 Difference]: Finished difference. Result has 221 places, 284 transitions, 3546 flow [2024-06-27 21:30:48,779 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3288, PETRI_DIFFERENCE_MINUEND_PLACES=214, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=280, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=84, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=196, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3546, PETRI_PLACES=221, PETRI_TRANSITIONS=284} [2024-06-27 21:30:48,779 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 177 predicate places. [2024-06-27 21:30:48,780 INFO L495 AbstractCegarLoop]: Abstraction has has 221 places, 284 transitions, 3546 flow [2024-06-27 21:30:48,780 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.125) internal successors, (81), 8 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:30:48,780 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:30:48,780 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:30:48,780 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64 [2024-06-27 21:30:48,780 INFO L420 AbstractCegarLoop]: === Iteration 66 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:30:48,780 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:30:48,781 INFO L85 PathProgramCache]: Analyzing trace with hash -1649782248, now seen corresponding path program 6 times [2024-06-27 21:30:48,781 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:30:48,781 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1934488216] [2024-06-27 21:30:48,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:30:48,781 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:30:48,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:30:50,864 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:30:50,865 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:30:50,865 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1934488216] [2024-06-27 21:30:50,865 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1934488216] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:30:50,865 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:30:50,865 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 21:30:50,865 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1540071315] [2024-06-27 21:30:50,866 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:30:50,866 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 21:30:50,866 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:30:50,866 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 21:30:50,866 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-27 21:30:50,876 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-27 21:30:50,877 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 221 places, 284 transitions, 3546 flow. Second operand has 8 states, 8 states have (on average 10.125) internal successors, (81), 8 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:30:50,877 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:30:50,877 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-27 21:30:50,877 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:30:52,309 INFO L124 PetriNetUnfolderBase]: 2770/4409 cut-off events. [2024-06-27 21:30:52,309 INFO L125 PetriNetUnfolderBase]: For 341405/341413 co-relation queries the response was YES. [2024-06-27 21:30:52,340 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31023 conditions, 4409 events. 2770/4409 cut-off events. For 341405/341413 co-relation queries the response was YES. Maximal size of possible extension queue 253. Compared 25530 event pairs, 665 based on Foata normal form. 10/4418 useless extension candidates. Maximal degree in co-relation 30917. Up to 3908 conditions per place. [2024-06-27 21:30:52,357 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 211 selfloop transitions, 93 changer transitions 0/309 dead transitions. [2024-06-27 21:30:52,357 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 227 places, 309 transitions, 4411 flow [2024-06-27 21:30:52,358 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 21:30:52,358 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 21:30:52,358 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 122 transitions. [2024-06-27 21:30:52,358 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4053156146179402 [2024-06-27 21:30:52,363 INFO L175 Difference]: Start difference. First operand has 221 places, 284 transitions, 3546 flow. Second operand 7 states and 122 transitions. [2024-06-27 21:30:52,363 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 227 places, 309 transitions, 4411 flow [2024-06-27 21:30:52,804 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 225 places, 309 transitions, 4303 flow, removed 17 selfloop flow, removed 2 redundant places. [2024-06-27 21:30:52,808 INFO L231 Difference]: Finished difference. Result has 226 places, 288 transitions, 3701 flow [2024-06-27 21:30:52,808 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3446, PETRI_DIFFERENCE_MINUEND_PLACES=219, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=284, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=89, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=195, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3701, PETRI_PLACES=226, PETRI_TRANSITIONS=288} [2024-06-27 21:30:52,809 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 182 predicate places. [2024-06-27 21:30:52,809 INFO L495 AbstractCegarLoop]: Abstraction has has 226 places, 288 transitions, 3701 flow [2024-06-27 21:30:52,809 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.125) internal successors, (81), 8 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:30:52,809 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:30:52,809 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:30:52,809 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65 [2024-06-27 21:30:52,809 INFO L420 AbstractCegarLoop]: === Iteration 67 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:30:52,810 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:30:52,810 INFO L85 PathProgramCache]: Analyzing trace with hash -1979831820, now seen corresponding path program 5 times [2024-06-27 21:30:52,810 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:30:52,810 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1359189352] [2024-06-27 21:30:52,810 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:30:52,811 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:30:52,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:30:55,190 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:30:55,190 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:30:55,190 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1359189352] [2024-06-27 21:30:55,190 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1359189352] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:30:55,190 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:30:55,190 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:30:55,190 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [227379515] [2024-06-27 21:30:55,190 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:30:55,191 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:30:55,191 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:30:55,191 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:30:55,191 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:30:55,203 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-27 21:30:55,203 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 226 places, 288 transitions, 3701 flow. Second operand has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:30:55,203 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:30:55,203 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-27 21:30:55,204 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:30:57,089 INFO L124 PetriNetUnfolderBase]: 2796/4460 cut-off events. [2024-06-27 21:30:57,089 INFO L125 PetriNetUnfolderBase]: For 357921/357923 co-relation queries the response was YES. [2024-06-27 21:30:57,120 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31673 conditions, 4460 events. 2796/4460 cut-off events. For 357921/357923 co-relation queries the response was YES. Maximal size of possible extension queue 260. Compared 25816 event pairs, 741 based on Foata normal form. 4/4463 useless extension candidates. Maximal degree in co-relation 31565. Up to 3623 conditions per place. [2024-06-27 21:30:57,139 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 193 selfloop transitions, 123 changer transitions 0/321 dead transitions. [2024-06-27 21:30:57,139 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 233 places, 321 transitions, 4917 flow [2024-06-27 21:30:57,140 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 21:30:57,140 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 21:30:57,140 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 143 transitions. [2024-06-27 21:30:57,140 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41569767441860467 [2024-06-27 21:30:57,140 INFO L175 Difference]: Start difference. First operand has 226 places, 288 transitions, 3701 flow. Second operand 8 states and 143 transitions. [2024-06-27 21:30:57,140 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 233 places, 321 transitions, 4917 flow [2024-06-27 21:30:57,555 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 230 places, 321 transitions, 4787 flow, removed 9 selfloop flow, removed 3 redundant places. [2024-06-27 21:30:57,560 INFO L231 Difference]: Finished difference. Result has 231 places, 294 transitions, 3947 flow [2024-06-27 21:30:57,560 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3571, PETRI_DIFFERENCE_MINUEND_PLACES=223, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=288, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=117, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=171, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3947, PETRI_PLACES=231, PETRI_TRANSITIONS=294} [2024-06-27 21:30:57,560 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 187 predicate places. [2024-06-27 21:30:57,560 INFO L495 AbstractCegarLoop]: Abstraction has has 231 places, 294 transitions, 3947 flow [2024-06-27 21:30:57,560 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:30:57,561 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:30:57,561 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:30:57,561 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66 [2024-06-27 21:30:57,561 INFO L420 AbstractCegarLoop]: === Iteration 68 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:30:57,562 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:30:57,562 INFO L85 PathProgramCache]: Analyzing trace with hash 771018168, now seen corresponding path program 7 times [2024-06-27 21:30:57,562 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:30:57,562 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1698548101] [2024-06-27 21:30:57,562 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:30:57,562 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:30:57,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:31:00,158 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:31:00,158 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:31:00,158 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1698548101] [2024-06-27 21:31:00,159 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1698548101] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:31:00,159 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:31:00,159 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:31:00,159 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [877517025] [2024-06-27 21:31:00,159 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:31:00,159 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:31:00,159 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:31:00,159 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:31:00,159 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:31:00,186 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-27 21:31:00,186 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 231 places, 294 transitions, 3947 flow. Second operand has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:31:00,186 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:31:00,186 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-27 21:31:00,186 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:31:02,284 INFO L124 PetriNetUnfolderBase]: 2790/4450 cut-off events. [2024-06-27 21:31:02,284 INFO L125 PetriNetUnfolderBase]: For 364927/364929 co-relation queries the response was YES. [2024-06-27 21:31:02,314 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31824 conditions, 4450 events. 2790/4450 cut-off events. For 364927/364929 co-relation queries the response was YES. Maximal size of possible extension queue 260. Compared 25862 event pairs, 702 based on Foata normal form. 4/4453 useless extension candidates. Maximal degree in co-relation 31715. Up to 3939 conditions per place. [2024-06-27 21:31:02,331 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 217 selfloop transitions, 98 changer transitions 0/320 dead transitions. [2024-06-27 21:31:02,331 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 240 places, 320 transitions, 4909 flow [2024-06-27 21:31:02,332 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 21:31:02,333 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 21:31:02,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 161 transitions. [2024-06-27 21:31:02,333 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3744186046511628 [2024-06-27 21:31:02,333 INFO L175 Difference]: Start difference. First operand has 231 places, 294 transitions, 3947 flow. Second operand 10 states and 161 transitions. [2024-06-27 21:31:02,333 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 240 places, 320 transitions, 4909 flow [2024-06-27 21:31:02,717 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 236 places, 320 transitions, 4675 flow, removed 22 selfloop flow, removed 4 redundant places. [2024-06-27 21:31:02,721 INFO L231 Difference]: Finished difference. Result has 237 places, 294 transitions, 3915 flow [2024-06-27 21:31:02,721 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3713, PETRI_DIFFERENCE_MINUEND_PLACES=227, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=294, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=98, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=196, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3915, PETRI_PLACES=237, PETRI_TRANSITIONS=294} [2024-06-27 21:31:02,722 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 193 predicate places. [2024-06-27 21:31:02,722 INFO L495 AbstractCegarLoop]: Abstraction has has 237 places, 294 transitions, 3915 flow [2024-06-27 21:31:02,722 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:31:02,722 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:31:02,722 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:31:02,722 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67 [2024-06-27 21:31:02,722 INFO L420 AbstractCegarLoop]: === Iteration 69 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:31:02,723 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:31:02,723 INFO L85 PathProgramCache]: Analyzing trace with hash -2063891584, now seen corresponding path program 6 times [2024-06-27 21:31:02,723 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:31:02,723 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [549505054] [2024-06-27 21:31:02,723 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:31:02,723 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:31:02,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:31:05,389 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:31:05,389 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:31:05,389 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [549505054] [2024-06-27 21:31:05,389 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [549505054] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:31:05,389 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:31:05,389 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:31:05,389 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [93519463] [2024-06-27 21:31:05,389 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:31:05,390 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:31:05,390 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:31:05,390 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:31:05,390 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:31:05,428 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-27 21:31:05,428 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 237 places, 294 transitions, 3915 flow. Second operand has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:31:05,428 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:31:05,428 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-27 21:31:05,428 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:31:07,103 INFO L124 PetriNetUnfolderBase]: 2784/4444 cut-off events. [2024-06-27 21:31:07,103 INFO L125 PetriNetUnfolderBase]: For 369718/369720 co-relation queries the response was YES. [2024-06-27 21:31:07,129 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31605 conditions, 4444 events. 2784/4444 cut-off events. For 369718/369720 co-relation queries the response was YES. Maximal size of possible extension queue 261. Compared 25830 event pairs, 693 based on Foata normal form. 4/4448 useless extension candidates. Maximal degree in co-relation 31495. Up to 4132 conditions per place. [2024-06-27 21:31:07,144 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 268 selfloop transitions, 43 changer transitions 0/316 dead transitions. [2024-06-27 21:31:07,145 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 244 places, 316 transitions, 4593 flow [2024-06-27 21:31:07,145 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 21:31:07,146 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 21:31:07,146 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 134 transitions. [2024-06-27 21:31:07,146 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38953488372093026 [2024-06-27 21:31:07,146 INFO L175 Difference]: Start difference. First operand has 237 places, 294 transitions, 3915 flow. Second operand 8 states and 134 transitions. [2024-06-27 21:31:07,146 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 244 places, 316 transitions, 4593 flow [2024-06-27 21:31:07,701 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 238 places, 316 transitions, 4379 flow, removed 37 selfloop flow, removed 6 redundant places. [2024-06-27 21:31:07,705 INFO L231 Difference]: Finished difference. Result has 239 places, 294 transitions, 3793 flow [2024-06-27 21:31:07,705 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3701, PETRI_DIFFERENCE_MINUEND_PLACES=231, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=294, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=251, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3793, PETRI_PLACES=239, PETRI_TRANSITIONS=294} [2024-06-27 21:31:07,705 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 195 predicate places. [2024-06-27 21:31:07,706 INFO L495 AbstractCegarLoop]: Abstraction has has 239 places, 294 transitions, 3793 flow [2024-06-27 21:31:07,706 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:31:07,706 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:31:07,706 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:31:07,706 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68 [2024-06-27 21:31:07,706 INFO L420 AbstractCegarLoop]: === Iteration 70 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:31:07,706 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:31:07,706 INFO L85 PathProgramCache]: Analyzing trace with hash 1640541228, now seen corresponding path program 8 times [2024-06-27 21:31:07,707 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:31:07,707 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [836616534] [2024-06-27 21:31:07,707 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:31:07,707 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:31:07,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:31:10,018 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:31:10,018 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:31:10,019 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [836616534] [2024-06-27 21:31:10,019 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [836616534] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:31:10,019 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:31:10,019 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:31:10,019 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1426345080] [2024-06-27 21:31:10,019 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:31:10,019 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:31:10,019 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:31:10,020 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:31:10,020 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:31:10,023 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-27 21:31:10,024 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 239 places, 294 transitions, 3793 flow. Second operand has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:31:10,024 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:31:10,024 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-27 21:31:10,024 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:31:11,632 INFO L124 PetriNetUnfolderBase]: 2778/4430 cut-off events. [2024-06-27 21:31:11,632 INFO L125 PetriNetUnfolderBase]: For 374041/374043 co-relation queries the response was YES. [2024-06-27 21:31:11,663 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31224 conditions, 4430 events. 2778/4430 cut-off events. For 374041/374043 co-relation queries the response was YES. Maximal size of possible extension queue 259. Compared 25688 event pairs, 691 based on Foata normal form. 4/4433 useless extension candidates. Maximal degree in co-relation 31113. Up to 3926 conditions per place. [2024-06-27 21:31:11,695 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 214 selfloop transitions, 97 changer transitions 0/316 dead transitions. [2024-06-27 21:31:11,696 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 246 places, 316 transitions, 4611 flow [2024-06-27 21:31:11,696 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 21:31:11,697 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 21:31:11,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 135 transitions. [2024-06-27 21:31:11,697 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39244186046511625 [2024-06-27 21:31:11,697 INFO L175 Difference]: Start difference. First operand has 239 places, 294 transitions, 3793 flow. Second operand 8 states and 135 transitions. [2024-06-27 21:31:11,697 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 246 places, 316 transitions, 4611 flow [2024-06-27 21:31:12,227 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 239 places, 316 transitions, 4495 flow, removed 7 selfloop flow, removed 7 redundant places. [2024-06-27 21:31:12,231 INFO L231 Difference]: Finished difference. Result has 240 places, 294 transitions, 3877 flow [2024-06-27 21:31:12,231 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3677, PETRI_DIFFERENCE_MINUEND_PLACES=232, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=294, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=97, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=197, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3877, PETRI_PLACES=240, PETRI_TRANSITIONS=294} [2024-06-27 21:31:12,231 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 196 predicate places. [2024-06-27 21:31:12,232 INFO L495 AbstractCegarLoop]: Abstraction has has 240 places, 294 transitions, 3877 flow [2024-06-27 21:31:12,232 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:31:12,232 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:31:12,232 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:31:12,232 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable69 [2024-06-27 21:31:12,232 INFO L420 AbstractCegarLoop]: === Iteration 71 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:31:12,233 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:31:12,233 INFO L85 PathProgramCache]: Analyzing trace with hash 1304814132, now seen corresponding path program 7 times [2024-06-27 21:31:12,233 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:31:12,233 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [628420181] [2024-06-27 21:31:12,233 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:31:12,233 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:31:12,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:31:14,504 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:31:14,505 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:31:14,505 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [628420181] [2024-06-27 21:31:14,505 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [628420181] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:31:14,505 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:31:14,505 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:31:14,505 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [35699876] [2024-06-27 21:31:14,505 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:31:14,506 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:31:14,506 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:31:14,506 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:31:14,506 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:31:14,561 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-27 21:31:14,562 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 240 places, 294 transitions, 3877 flow. Second operand has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:31:14,562 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:31:14,562 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-27 21:31:14,562 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:31:16,461 INFO L124 PetriNetUnfolderBase]: 2990/4711 cut-off events. [2024-06-27 21:31:16,461 INFO L125 PetriNetUnfolderBase]: For 448105/448105 co-relation queries the response was YES. [2024-06-27 21:31:16,490 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35360 conditions, 4711 events. 2990/4711 cut-off events. For 448105/448105 co-relation queries the response was YES. Maximal size of possible extension queue 275. Compared 27203 event pairs, 699 based on Foata normal form. 4/4713 useless extension candidates. Maximal degree in co-relation 35248. Up to 4023 conditions per place. [2024-06-27 21:31:16,505 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 242 selfloop transitions, 107 changer transitions 0/354 dead transitions. [2024-06-27 21:31:16,506 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 250 places, 354 transitions, 5674 flow [2024-06-27 21:31:16,506 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-27 21:31:16,507 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-27 21:31:16,507 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 187 transitions. [2024-06-27 21:31:16,507 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3953488372093023 [2024-06-27 21:31:16,507 INFO L175 Difference]: Start difference. First operand has 240 places, 294 transitions, 3877 flow. Second operand 11 states and 187 transitions. [2024-06-27 21:31:16,507 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 250 places, 354 transitions, 5674 flow [2024-06-27 21:31:17,136 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 243 places, 354 transitions, 5478 flow, removed 0 selfloop flow, removed 7 redundant places. [2024-06-27 21:31:17,141 INFO L231 Difference]: Finished difference. Result has 246 places, 316 transitions, 4348 flow [2024-06-27 21:31:17,141 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3683, PETRI_DIFFERENCE_MINUEND_PLACES=233, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=294, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=90, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=201, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=4348, PETRI_PLACES=246, PETRI_TRANSITIONS=316} [2024-06-27 21:31:17,141 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 202 predicate places. [2024-06-27 21:31:17,141 INFO L495 AbstractCegarLoop]: Abstraction has has 246 places, 316 transitions, 4348 flow [2024-06-27 21:31:17,142 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:31:17,142 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:31:17,142 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:31:17,142 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70 [2024-06-27 21:31:17,142 INFO L420 AbstractCegarLoop]: === Iteration 72 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:31:17,142 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:31:17,142 INFO L85 PathProgramCache]: Analyzing trace with hash 1947535700, now seen corresponding path program 8 times [2024-06-27 21:31:17,142 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:31:17,143 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [426933542] [2024-06-27 21:31:17,143 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:31:17,143 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:31:17,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:31:20,070 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:31:20,071 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:31:20,071 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [426933542] [2024-06-27 21:31:20,071 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [426933542] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:31:20,071 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:31:20,071 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:31:20,071 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [66852547] [2024-06-27 21:31:20,071 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:31:20,071 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:31:20,071 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:31:20,071 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:31:20,072 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:31:20,087 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-27 21:31:20,087 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 246 places, 316 transitions, 4348 flow. Second operand has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:31:20,087 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:31:20,087 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-27 21:31:20,087 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:31:21,945 INFO L124 PetriNetUnfolderBase]: 2984/4714 cut-off events. [2024-06-27 21:31:21,945 INFO L125 PetriNetUnfolderBase]: For 457028/457028 co-relation queries the response was YES. [2024-06-27 21:31:21,975 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36178 conditions, 4714 events. 2984/4714 cut-off events. For 457028/457028 co-relation queries the response was YES. Maximal size of possible extension queue 274. Compared 27340 event pairs, 738 based on Foata normal form. 2/4716 useless extension candidates. Maximal degree in co-relation 36063. Up to 4443 conditions per place. [2024-06-27 21:31:21,992 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 305 selfloop transitions, 32 changer transitions 0/342 dead transitions. [2024-06-27 21:31:21,992 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 255 places, 342 transitions, 5320 flow [2024-06-27 21:31:21,993 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 21:31:21,993 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 21:31:21,993 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 156 transitions. [2024-06-27 21:31:21,993 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3627906976744186 [2024-06-27 21:31:21,993 INFO L175 Difference]: Start difference. First operand has 246 places, 316 transitions, 4348 flow. Second operand 10 states and 156 transitions. [2024-06-27 21:31:21,994 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 255 places, 342 transitions, 5320 flow [2024-06-27 21:31:22,658 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 247 places, 342 transitions, 4980 flow, removed 103 selfloop flow, removed 8 redundant places. [2024-06-27 21:31:22,662 INFO L231 Difference]: Finished difference. Result has 249 places, 318 transitions, 4159 flow [2024-06-27 21:31:22,662 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=4008, PETRI_DIFFERENCE_MINUEND_PLACES=238, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=316, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=284, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=4159, PETRI_PLACES=249, PETRI_TRANSITIONS=318} [2024-06-27 21:31:22,662 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 205 predicate places. [2024-06-27 21:31:22,663 INFO L495 AbstractCegarLoop]: Abstraction has has 249 places, 318 transitions, 4159 flow [2024-06-27 21:31:22,663 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:31:22,663 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:31:22,663 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:31:22,663 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71 [2024-06-27 21:31:22,663 INFO L420 AbstractCegarLoop]: === Iteration 73 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:31:22,663 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:31:22,664 INFO L85 PathProgramCache]: Analyzing trace with hash -268922410, now seen corresponding path program 9 times [2024-06-27 21:31:22,664 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:31:22,664 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1858377136] [2024-06-27 21:31:22,664 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:31:22,664 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:31:22,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:31:25,085 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:31:25,085 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:31:25,085 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1858377136] [2024-06-27 21:31:25,085 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1858377136] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:31:25,085 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:31:25,085 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:31:25,086 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [801659375] [2024-06-27 21:31:25,086 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:31:25,086 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:31:25,086 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:31:25,086 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:31:25,086 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:31:25,106 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-27 21:31:25,106 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 249 places, 318 transitions, 4159 flow. Second operand has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:31:25,106 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:31:25,106 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-27 21:31:25,106 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:31:26,654 INFO L124 PetriNetUnfolderBase]: 3004/4744 cut-off events. [2024-06-27 21:31:26,654 INFO L125 PetriNetUnfolderBase]: For 462285/462285 co-relation queries the response was YES. [2024-06-27 21:31:26,689 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35399 conditions, 4744 events. 3004/4744 cut-off events. For 462285/462285 co-relation queries the response was YES. Maximal size of possible extension queue 278. Compared 27543 event pairs, 731 based on Foata normal form. 2/4746 useless extension candidates. Maximal degree in co-relation 35283. Up to 4520 conditions per place. [2024-06-27 21:31:26,709 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 312 selfloop transitions, 27 changer transitions 0/344 dead transitions. [2024-06-27 21:31:26,709 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 257 places, 344 transitions, 4999 flow [2024-06-27 21:31:26,710 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 21:31:26,710 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 21:31:26,710 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 141 transitions. [2024-06-27 21:31:26,711 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3643410852713178 [2024-06-27 21:31:26,711 INFO L175 Difference]: Start difference. First operand has 249 places, 318 transitions, 4159 flow. Second operand 9 states and 141 transitions. [2024-06-27 21:31:26,711 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 257 places, 344 transitions, 4999 flow [2024-06-27 21:31:27,330 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 251 places, 344 transitions, 4874 flow, removed 35 selfloop flow, removed 6 redundant places. [2024-06-27 21:31:27,334 INFO L231 Difference]: Finished difference. Result has 252 places, 324 transitions, 4214 flow [2024-06-27 21:31:27,334 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=4041, PETRI_DIFFERENCE_MINUEND_PLACES=243, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=318, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=294, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4214, PETRI_PLACES=252, PETRI_TRANSITIONS=324} [2024-06-27 21:31:27,334 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 208 predicate places. [2024-06-27 21:31:27,335 INFO L495 AbstractCegarLoop]: Abstraction has has 252 places, 324 transitions, 4214 flow [2024-06-27 21:31:27,335 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:31:27,335 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:31:27,335 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:31:27,335 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72 [2024-06-27 21:31:27,335 INFO L420 AbstractCegarLoop]: === Iteration 74 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:31:27,335 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:31:27,336 INFO L85 PathProgramCache]: Analyzing trace with hash -476021506, now seen corresponding path program 9 times [2024-06-27 21:31:27,336 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:31:27,336 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1423732976] [2024-06-27 21:31:27,336 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:31:27,336 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:31:27,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:31:29,394 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:31:29,394 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:31:29,394 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1423732976] [2024-06-27 21:31:29,394 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1423732976] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:31:29,395 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:31:29,395 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 21:31:29,395 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [481021661] [2024-06-27 21:31:29,395 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:31:29,395 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 21:31:29,395 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:31:29,396 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 21:31:29,396 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-27 21:31:29,417 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-27 21:31:29,417 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 252 places, 324 transitions, 4214 flow. Second operand has 8 states, 8 states have (on average 10.125) internal successors, (81), 8 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:31:29,417 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:31:29,417 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-27 21:31:29,417 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:31:30,916 INFO L124 PetriNetUnfolderBase]: 2992/4727 cut-off events. [2024-06-27 21:31:30,917 INFO L125 PetriNetUnfolderBase]: For 469121/469121 co-relation queries the response was YES. [2024-06-27 21:31:30,948 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35033 conditions, 4727 events. 2992/4727 cut-off events. For 469121/469121 co-relation queries the response was YES. Maximal size of possible extension queue 279. Compared 27471 event pairs, 762 based on Foata normal form. 4/4729 useless extension candidates. Maximal degree in co-relation 34916. Up to 4435 conditions per place. [2024-06-27 21:31:30,964 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 283 selfloop transitions, 56 changer transitions 0/344 dead transitions. [2024-06-27 21:31:30,964 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 260 places, 344 transitions, 5105 flow [2024-06-27 21:31:30,965 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 21:31:30,965 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 21:31:30,965 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 147 transitions. [2024-06-27 21:31:30,966 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3798449612403101 [2024-06-27 21:31:30,966 INFO L175 Difference]: Start difference. First operand has 252 places, 324 transitions, 4214 flow. Second operand 9 states and 147 transitions. [2024-06-27 21:31:30,966 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 260 places, 344 transitions, 5105 flow [2024-06-27 21:31:31,654 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 254 places, 344 transitions, 5007 flow, removed 25 selfloop flow, removed 6 redundant places. [2024-06-27 21:31:31,658 INFO L231 Difference]: Finished difference. Result has 255 places, 324 transitions, 4239 flow [2024-06-27 21:31:31,659 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=4116, PETRI_DIFFERENCE_MINUEND_PLACES=246, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=324, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=56, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=268, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4239, PETRI_PLACES=255, PETRI_TRANSITIONS=324} [2024-06-27 21:31:31,659 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 211 predicate places. [2024-06-27 21:31:31,659 INFO L495 AbstractCegarLoop]: Abstraction has has 255 places, 324 transitions, 4239 flow [2024-06-27 21:31:31,659 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.125) internal successors, (81), 8 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:31:31,659 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:31:31,659 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:31:31,660 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73 [2024-06-27 21:31:31,660 INFO L420 AbstractCegarLoop]: === Iteration 75 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:31:31,660 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:31:31,660 INFO L85 PathProgramCache]: Analyzing trace with hash -2021755050, now seen corresponding path program 10 times [2024-06-27 21:31:31,660 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:31:31,660 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [512405314] [2024-06-27 21:31:31,660 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:31:31,661 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:31:31,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:31:33,921 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:31:33,921 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:31:33,921 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [512405314] [2024-06-27 21:31:33,921 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [512405314] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:31:33,921 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:31:33,922 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 21:31:33,922 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1632836253] [2024-06-27 21:31:33,922 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:31:33,922 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 21:31:33,922 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:31:33,922 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 21:31:33,922 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-27 21:31:33,934 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-27 21:31:33,934 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 255 places, 324 transitions, 4239 flow. Second operand has 8 states, 8 states have (on average 10.125) internal successors, (81), 8 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:31:33,934 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:31:33,934 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-27 21:31:33,934 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:31:35,212 INFO L124 PetriNetUnfolderBase]: 2986/4703 cut-off events. [2024-06-27 21:31:35,213 INFO L125 PetriNetUnfolderBase]: For 469492/469492 co-relation queries the response was YES. [2024-06-27 21:31:35,247 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34963 conditions, 4703 events. 2986/4703 cut-off events. For 469492/469492 co-relation queries the response was YES. Maximal size of possible extension queue 278. Compared 27249 event pairs, 761 based on Foata normal form. 2/4703 useless extension candidates. Maximal degree in co-relation 34845. Up to 4430 conditions per place. [2024-06-27 21:31:35,265 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 278 selfloop transitions, 57 changer transitions 0/340 dead transitions. [2024-06-27 21:31:35,265 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 262 places, 340 transitions, 4953 flow [2024-06-27 21:31:35,266 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 21:31:35,266 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 21:31:35,266 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 130 transitions. [2024-06-27 21:31:35,266 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37790697674418605 [2024-06-27 21:31:35,266 INFO L175 Difference]: Start difference. First operand has 255 places, 324 transitions, 4239 flow. Second operand 8 states and 130 transitions. [2024-06-27 21:31:35,267 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 262 places, 340 transitions, 4953 flow [2024-06-27 21:31:35,958 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 256 places, 340 transitions, 4858 flow, removed 4 selfloop flow, removed 6 redundant places. [2024-06-27 21:31:35,962 INFO L231 Difference]: Finished difference. Result has 257 places, 324 transitions, 4264 flow [2024-06-27 21:31:35,962 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=4144, PETRI_DIFFERENCE_MINUEND_PLACES=249, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=324, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=57, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=267, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4264, PETRI_PLACES=257, PETRI_TRANSITIONS=324} [2024-06-27 21:31:35,963 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 213 predicate places. [2024-06-27 21:31:35,963 INFO L495 AbstractCegarLoop]: Abstraction has has 257 places, 324 transitions, 4264 flow [2024-06-27 21:31:35,963 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.125) internal successors, (81), 8 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:31:35,963 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:31:35,963 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:31:35,963 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74 [2024-06-27 21:31:35,963 INFO L420 AbstractCegarLoop]: === Iteration 76 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:31:35,964 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:31:35,964 INFO L85 PathProgramCache]: Analyzing trace with hash 1359879060, now seen corresponding path program 10 times [2024-06-27 21:31:35,964 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:31:35,964 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1633917881] [2024-06-27 21:31:35,964 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:31:35,964 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:31:35,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:31:38,401 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:31:38,402 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:31:38,402 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1633917881] [2024-06-27 21:31:38,402 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1633917881] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:31:38,402 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:31:38,402 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:31:38,402 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [824693844] [2024-06-27 21:31:38,402 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:31:38,403 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:31:38,403 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:31:38,403 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:31:38,403 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:31:38,417 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-27 21:31:38,418 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 257 places, 324 transitions, 4264 flow. Second operand has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:31:38,418 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:31:38,418 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-27 21:31:38,418 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:31:39,995 INFO L124 PetriNetUnfolderBase]: 2974/4695 cut-off events. [2024-06-27 21:31:39,995 INFO L125 PetriNetUnfolderBase]: For 475684/475684 co-relation queries the response was YES. [2024-06-27 21:31:40,030 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34694 conditions, 4695 events. 2974/4695 cut-off events. For 475684/475684 co-relation queries the response was YES. Maximal size of possible extension queue 279. Compared 27150 event pairs, 701 based on Foata normal form. 4/4697 useless extension candidates. Maximal degree in co-relation 34575. Up to 4013 conditions per place. [2024-06-27 21:31:40,049 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 240 selfloop transitions, 115 changer transitions 0/360 dead transitions. [2024-06-27 21:31:40,049 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 266 places, 360 transitions, 5679 flow [2024-06-27 21:31:40,050 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 21:31:40,050 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 21:31:40,050 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 172 transitions. [2024-06-27 21:31:40,051 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4 [2024-06-27 21:31:40,051 INFO L175 Difference]: Start difference. First operand has 257 places, 324 transitions, 4264 flow. Second operand 10 states and 172 transitions. [2024-06-27 21:31:40,051 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 266 places, 360 transitions, 5679 flow [2024-06-27 21:31:40,612 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 257 places, 360 transitions, 5489 flow, removed 14 selfloop flow, removed 9 redundant places. [2024-06-27 21:31:40,616 INFO L231 Difference]: Finished difference. Result has 258 places, 330 transitions, 4446 flow [2024-06-27 21:31:40,617 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=4074, PETRI_DIFFERENCE_MINUEND_PLACES=248, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=324, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=110, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=214, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=4446, PETRI_PLACES=258, PETRI_TRANSITIONS=330} [2024-06-27 21:31:40,617 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 214 predicate places. [2024-06-27 21:31:40,617 INFO L495 AbstractCegarLoop]: Abstraction has has 258 places, 330 transitions, 4446 flow [2024-06-27 21:31:40,617 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:31:40,617 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:31:40,617 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:31:40,618 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75 [2024-06-27 21:31:40,618 INFO L420 AbstractCegarLoop]: === Iteration 77 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:31:40,618 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:31:40,618 INFO L85 PathProgramCache]: Analyzing trace with hash 1794879120, now seen corresponding path program 11 times [2024-06-27 21:31:40,618 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:31:40,618 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2075875534] [2024-06-27 21:31:40,618 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:31:40,619 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:31:40,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:31:43,185 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:31:43,185 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:31:43,185 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2075875534] [2024-06-27 21:31:43,185 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2075875534] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:31:43,186 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:31:43,186 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:31:43,186 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1067680125] [2024-06-27 21:31:43,186 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:31:43,186 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:31:43,186 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:31:43,186 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:31:43,187 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:31:43,199 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-27 21:31:43,199 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 258 places, 330 transitions, 4446 flow. Second operand has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:31:43,199 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:31:43,199 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-27 21:31:43,199 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:31:45,154 INFO L124 PetriNetUnfolderBase]: 2968/4698 cut-off events. [2024-06-27 21:31:45,154 INFO L125 PetriNetUnfolderBase]: For 477694/477694 co-relation queries the response was YES. [2024-06-27 21:31:45,185 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34906 conditions, 4698 events. 2968/4698 cut-off events. For 477694/477694 co-relation queries the response was YES. Maximal size of possible extension queue 278. Compared 27295 event pairs, 726 based on Foata normal form. 2/4700 useless extension candidates. Maximal degree in co-relation 34786. Up to 4408 conditions per place. [2024-06-27 21:31:45,201 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 315 selfloop transitions, 38 changer transitions 0/358 dead transitions. [2024-06-27 21:31:45,201 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 269 places, 358 transitions, 5405 flow [2024-06-27 21:31:45,202 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-27 21:31:45,202 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-27 21:31:45,203 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 182 transitions. [2024-06-27 21:31:45,203 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.35271317829457366 [2024-06-27 21:31:45,203 INFO L175 Difference]: Start difference. First operand has 258 places, 330 transitions, 4446 flow. Second operand 12 states and 182 transitions. [2024-06-27 21:31:45,203 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 269 places, 358 transitions, 5405 flow [2024-06-27 21:31:45,924 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 264 places, 358 transitions, 5254 flow, removed 36 selfloop flow, removed 5 redundant places. [2024-06-27 21:31:45,929 INFO L231 Difference]: Finished difference. Result has 265 places, 331 transitions, 4420 flow [2024-06-27 21:31:45,929 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=4295, PETRI_DIFFERENCE_MINUEND_PLACES=253, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=330, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=292, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=4420, PETRI_PLACES=265, PETRI_TRANSITIONS=331} [2024-06-27 21:31:45,929 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 221 predicate places. [2024-06-27 21:31:45,929 INFO L495 AbstractCegarLoop]: Abstraction has has 265 places, 331 transitions, 4420 flow [2024-06-27 21:31:45,930 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:31:45,930 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:31:45,930 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:31:45,930 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76 [2024-06-27 21:31:45,930 INFO L420 AbstractCegarLoop]: === Iteration 78 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:31:45,930 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:31:45,930 INFO L85 PathProgramCache]: Analyzing trace with hash -2022021774, now seen corresponding path program 12 times [2024-06-27 21:31:45,931 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:31:45,931 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1720504207] [2024-06-27 21:31:45,931 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:31:45,931 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:31:45,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:31:48,614 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:31:48,614 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:31:48,614 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1720504207] [2024-06-27 21:31:48,614 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1720504207] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:31:48,615 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:31:48,615 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:31:48,615 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2110208096] [2024-06-27 21:31:48,615 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:31:48,615 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:31:48,615 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:31:48,616 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:31:48,616 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:31:48,634 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-27 21:31:48,634 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 265 places, 331 transitions, 4420 flow. Second operand has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:31:48,634 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:31:48,634 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-27 21:31:48,634 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:31:49,931 INFO L124 PetriNetUnfolderBase]: 2962/4673 cut-off events. [2024-06-27 21:31:49,931 INFO L125 PetriNetUnfolderBase]: For 481087/481087 co-relation queries the response was YES. [2024-06-27 21:31:49,965 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34790 conditions, 4673 events. 2962/4673 cut-off events. For 481087/481087 co-relation queries the response was YES. Maximal size of possible extension queue 278. Compared 27002 event pairs, 696 based on Foata normal form. 2/4673 useless extension candidates. Maximal degree in co-relation 34668. Up to 4007 conditions per place. [2024-06-27 21:31:49,982 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 227 selfloop transitions, 123 changer transitions 0/355 dead transitions. [2024-06-27 21:31:49,982 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 273 places, 355 transitions, 5505 flow [2024-06-27 21:31:49,983 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 21:31:49,983 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 21:31:49,983 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 152 transitions. [2024-06-27 21:31:49,984 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39276485788113696 [2024-06-27 21:31:49,984 INFO L175 Difference]: Start difference. First operand has 265 places, 331 transitions, 4420 flow. Second operand 9 states and 152 transitions. [2024-06-27 21:31:49,984 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 273 places, 355 transitions, 5505 flow [2024-06-27 21:31:50,498 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 263 places, 355 transitions, 5319 flow, removed 44 selfloop flow, removed 10 redundant places. [2024-06-27 21:31:50,502 INFO L231 Difference]: Finished difference. Result has 264 places, 331 transitions, 4486 flow [2024-06-27 21:31:50,502 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=4234, PETRI_DIFFERENCE_MINUEND_PLACES=255, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=331, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=123, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=208, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4486, PETRI_PLACES=264, PETRI_TRANSITIONS=331} [2024-06-27 21:31:50,503 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 220 predicate places. [2024-06-27 21:31:50,503 INFO L495 AbstractCegarLoop]: Abstraction has has 264 places, 331 transitions, 4486 flow [2024-06-27 21:31:50,503 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:31:50,503 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:31:50,503 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:31:50,503 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77 [2024-06-27 21:31:50,503 INFO L420 AbstractCegarLoop]: === Iteration 79 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:31:50,504 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:31:50,504 INFO L85 PathProgramCache]: Analyzing trace with hash -475775242, now seen corresponding path program 2 times [2024-06-27 21:31:50,504 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:31:50,504 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1644895741] [2024-06-27 21:31:50,504 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:31:50,504 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:31:50,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:31:53,794 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:31:53,795 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:31:53,795 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1644895741] [2024-06-27 21:31:53,795 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1644895741] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:31:53,795 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:31:53,795 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:31:53,795 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1568246778] [2024-06-27 21:31:53,796 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:31:53,796 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:31:53,796 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:31:53,796 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:31:53,796 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:31:53,821 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-27 21:31:53,821 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 264 places, 331 transitions, 4486 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:31:53,822 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:31:53,822 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-27 21:31:53,822 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:31:55,398 INFO L124 PetriNetUnfolderBase]: 3006/4755 cut-off events. [2024-06-27 21:31:55,398 INFO L125 PetriNetUnfolderBase]: For 522223/522223 co-relation queries the response was YES. [2024-06-27 21:31:55,435 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35464 conditions, 4755 events. 3006/4755 cut-off events. For 522223/522223 co-relation queries the response was YES. Maximal size of possible extension queue 282. Compared 27688 event pairs, 722 based on Foata normal form. 12/4765 useless extension candidates. Maximal degree in co-relation 35342. Up to 4418 conditions per place. [2024-06-27 21:31:55,455 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 314 selfloop transitions, 39 changer transitions 0/358 dead transitions. [2024-06-27 21:31:55,455 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 271 places, 358 transitions, 5365 flow [2024-06-27 21:31:55,456 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 21:31:55,456 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 21:31:55,456 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 135 transitions. [2024-06-27 21:31:55,456 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39244186046511625 [2024-06-27 21:31:55,456 INFO L175 Difference]: Start difference. First operand has 264 places, 331 transitions, 4486 flow. Second operand 8 states and 135 transitions. [2024-06-27 21:31:55,456 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 271 places, 358 transitions, 5365 flow [2024-06-27 21:31:56,035 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 263 places, 358 transitions, 5078 flow, removed 4 selfloop flow, removed 8 redundant places. [2024-06-27 21:31:56,039 INFO L231 Difference]: Finished difference. Result has 264 places, 332 transitions, 4303 flow [2024-06-27 21:31:56,039 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=4199, PETRI_DIFFERENCE_MINUEND_PLACES=256, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=331, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=292, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4303, PETRI_PLACES=264, PETRI_TRANSITIONS=332} [2024-06-27 21:31:56,040 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 220 predicate places. [2024-06-27 21:31:56,040 INFO L495 AbstractCegarLoop]: Abstraction has has 264 places, 332 transitions, 4303 flow [2024-06-27 21:31:56,040 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:31:56,040 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:31:56,040 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:31:56,040 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78 [2024-06-27 21:31:56,041 INFO L420 AbstractCegarLoop]: === Iteration 80 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:31:56,041 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:31:56,041 INFO L85 PathProgramCache]: Analyzing trace with hash -47246122, now seen corresponding path program 3 times [2024-06-27 21:31:56,041 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:31:56,041 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [851801368] [2024-06-27 21:31:56,041 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:31:56,041 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:31:56,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:31:59,503 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:31:59,504 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:31:59,504 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [851801368] [2024-06-27 21:31:59,504 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [851801368] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:31:59,504 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:31:59,504 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:31:59,504 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1640576460] [2024-06-27 21:31:59,504 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:31:59,504 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:31:59,504 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:31:59,504 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:31:59,505 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:31:59,522 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-27 21:31:59,522 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 264 places, 332 transitions, 4303 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:31:59,522 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:31:59,522 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-27 21:31:59,522 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:32:01,288 INFO L124 PetriNetUnfolderBase]: 3050/4842 cut-off events. [2024-06-27 21:32:01,289 INFO L125 PetriNetUnfolderBase]: For 535514/535514 co-relation queries the response was YES. [2024-06-27 21:32:01,329 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35784 conditions, 4842 events. 3050/4842 cut-off events. For 535514/535514 co-relation queries the response was YES. Maximal size of possible extension queue 285. Compared 28395 event pairs, 761 based on Foata normal form. 12/4854 useless extension candidates. Maximal degree in co-relation 35661. Up to 4587 conditions per place. [2024-06-27 21:32:01,349 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 332 selfloop transitions, 17 changer transitions 0/354 dead transitions. [2024-06-27 21:32:01,350 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 271 places, 354 transitions, 5103 flow [2024-06-27 21:32:01,351 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 21:32:01,351 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 21:32:01,351 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 127 transitions. [2024-06-27 21:32:01,351 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3691860465116279 [2024-06-27 21:32:01,351 INFO L175 Difference]: Start difference. First operand has 264 places, 332 transitions, 4303 flow. Second operand 8 states and 127 transitions. [2024-06-27 21:32:01,351 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 271 places, 354 transitions, 5103 flow [2024-06-27 21:32:02,152 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 265 places, 354 transitions, 5021 flow, removed 4 selfloop flow, removed 6 redundant places. [2024-06-27 21:32:02,156 INFO L231 Difference]: Finished difference. Result has 266 places, 333 transitions, 4283 flow [2024-06-27 21:32:02,156 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=4221, PETRI_DIFFERENCE_MINUEND_PLACES=258, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=332, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=315, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4283, PETRI_PLACES=266, PETRI_TRANSITIONS=333} [2024-06-27 21:32:02,157 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 222 predicate places. [2024-06-27 21:32:02,157 INFO L495 AbstractCegarLoop]: Abstraction has has 266 places, 333 transitions, 4283 flow [2024-06-27 21:32:02,157 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:32:02,157 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:32:02,157 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:32:02,157 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79 [2024-06-27 21:32:02,157 INFO L420 AbstractCegarLoop]: === Iteration 81 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:32:02,158 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:32:02,158 INFO L85 PathProgramCache]: Analyzing trace with hash 1803458928, now seen corresponding path program 4 times [2024-06-27 21:32:02,158 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:32:02,158 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [515249200] [2024-06-27 21:32:02,158 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:32:02,158 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:32:02,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:32:05,643 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:32:05,643 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:32:05,643 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [515249200] [2024-06-27 21:32:05,643 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [515249200] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:32:05,643 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:32:05,643 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:32:05,643 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1967190386] [2024-06-27 21:32:05,643 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:32:05,644 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:32:05,644 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:32:05,644 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:32:05,644 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:32:05,692 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-27 21:32:05,693 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 266 places, 333 transitions, 4283 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:32:05,693 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:32:05,693 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-27 21:32:05,693 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:32:07,347 INFO L124 PetriNetUnfolderBase]: 3052/4848 cut-off events. [2024-06-27 21:32:07,348 INFO L125 PetriNetUnfolderBase]: For 523221/523221 co-relation queries the response was YES. [2024-06-27 21:32:07,385 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35558 conditions, 4848 events. 3052/4848 cut-off events. For 523221/523221 co-relation queries the response was YES. Maximal size of possible extension queue 285. Compared 28429 event pairs, 753 based on Foata normal form. 8/4856 useless extension candidates. Maximal degree in co-relation 35434. Up to 4555 conditions per place. [2024-06-27 21:32:07,403 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 335 selfloop transitions, 20 changer transitions 0/360 dead transitions. [2024-06-27 21:32:07,404 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 274 places, 360 transitions, 5129 flow [2024-06-27 21:32:07,404 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 21:32:07,405 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 21:32:07,405 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 142 transitions. [2024-06-27 21:32:07,405 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3669250645994832 [2024-06-27 21:32:07,405 INFO L175 Difference]: Start difference. First operand has 266 places, 333 transitions, 4283 flow. Second operand 9 states and 142 transitions. [2024-06-27 21:32:07,405 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 274 places, 360 transitions, 5129 flow [2024-06-27 21:32:08,315 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 268 places, 360 transitions, 5089 flow, removed 5 selfloop flow, removed 6 redundant places. [2024-06-27 21:32:08,319 INFO L231 Difference]: Finished difference. Result has 269 places, 334 transitions, 4311 flow [2024-06-27 21:32:08,319 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=4243, PETRI_DIFFERENCE_MINUEND_PLACES=260, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=333, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=313, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4311, PETRI_PLACES=269, PETRI_TRANSITIONS=334} [2024-06-27 21:32:08,320 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 225 predicate places. [2024-06-27 21:32:08,320 INFO L495 AbstractCegarLoop]: Abstraction has has 269 places, 334 transitions, 4311 flow [2024-06-27 21:32:08,320 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:32:08,320 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:32:08,320 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:32:08,320 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80 [2024-06-27 21:32:08,321 INFO L420 AbstractCegarLoop]: === Iteration 82 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:32:08,321 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:32:08,321 INFO L85 PathProgramCache]: Analyzing trace with hash 1188061754, now seen corresponding path program 1 times [2024-06-27 21:32:08,321 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:32:08,321 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2100702027] [2024-06-27 21:32:08,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:32:08,321 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:32:08,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:32:11,479 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:32:11,479 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:32:11,480 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2100702027] [2024-06-27 21:32:11,480 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2100702027] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:32:11,480 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:32:11,480 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:32:11,480 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [197155579] [2024-06-27 21:32:11,480 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:32:11,480 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:32:11,480 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:32:11,481 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:32:11,481 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:32:11,513 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-27 21:32:11,513 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 269 places, 334 transitions, 4311 flow. Second operand has 9 states, 9 states have (on average 11.0) internal successors, (99), 9 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:32:11,513 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:32:11,513 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-27 21:32:11,514 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:32:13,092 INFO L124 PetriNetUnfolderBase]: 3012/4864 cut-off events. [2024-06-27 21:32:13,092 INFO L125 PetriNetUnfolderBase]: For 500104/500118 co-relation queries the response was YES. [2024-06-27 21:32:13,134 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34732 conditions, 4864 events. 3012/4864 cut-off events. For 500104/500118 co-relation queries the response was YES. Maximal size of possible extension queue 290. Compared 29301 event pairs, 628 based on Foata normal form. 10/4854 useless extension candidates. Maximal degree in co-relation 34607. Up to 4269 conditions per place. [2024-06-27 21:32:13,155 INFO L140 encePairwiseOnDemand]: 35/43 looper letters, 292 selfloop transitions, 42 changer transitions 0/370 dead transitions. [2024-06-27 21:32:13,155 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 275 places, 370 transitions, 5279 flow [2024-06-27 21:32:13,156 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 21:32:13,156 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 21:32:13,156 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 136 transitions. [2024-06-27 21:32:13,157 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45182724252491696 [2024-06-27 21:32:13,157 INFO L175 Difference]: Start difference. First operand has 269 places, 334 transitions, 4311 flow. Second operand 7 states and 136 transitions. [2024-06-27 21:32:13,157 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 275 places, 370 transitions, 5279 flow [2024-06-27 21:32:14,057 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 268 places, 370 transitions, 5227 flow, removed 7 selfloop flow, removed 7 redundant places. [2024-06-27 21:32:14,061 INFO L231 Difference]: Finished difference. Result has 269 places, 336 transitions, 4373 flow [2024-06-27 21:32:14,062 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=4259, PETRI_DIFFERENCE_MINUEND_PLACES=262, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=334, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=293, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4373, PETRI_PLACES=269, PETRI_TRANSITIONS=336} [2024-06-27 21:32:14,062 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 225 predicate places. [2024-06-27 21:32:14,062 INFO L495 AbstractCegarLoop]: Abstraction has has 269 places, 336 transitions, 4373 flow [2024-06-27 21:32:14,062 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.0) internal successors, (99), 9 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:32:14,063 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:32:14,063 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:32:14,063 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81 [2024-06-27 21:32:14,063 INFO L420 AbstractCegarLoop]: === Iteration 83 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:32:14,063 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:32:14,063 INFO L85 PathProgramCache]: Analyzing trace with hash -1652568838, now seen corresponding path program 2 times [2024-06-27 21:32:14,063 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:32:14,064 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1334360309] [2024-06-27 21:32:14,064 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:32:14,064 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:32:14,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:32:17,143 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:32:17,143 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:32:17,143 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1334360309] [2024-06-27 21:32:17,143 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1334360309] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:32:17,143 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:32:17,143 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:32:17,143 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [809559651] [2024-06-27 21:32:17,143 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:32:17,143 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:32:17,144 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:32:17,144 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:32:17,144 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:32:17,186 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-27 21:32:17,187 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 269 places, 336 transitions, 4373 flow. Second operand has 9 states, 9 states have (on average 11.0) internal successors, (99), 9 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:32:17,187 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:32:17,187 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-27 21:32:17,187 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:32:18,794 INFO L124 PetriNetUnfolderBase]: 3051/4917 cut-off events. [2024-06-27 21:32:18,794 INFO L125 PetriNetUnfolderBase]: For 528972/528988 co-relation queries the response was YES. [2024-06-27 21:32:18,834 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35158 conditions, 4917 events. 3051/4917 cut-off events. For 528972/528988 co-relation queries the response was YES. Maximal size of possible extension queue 297. Compared 29638 event pairs, 660 based on Foata normal form. 16/4910 useless extension candidates. Maximal degree in co-relation 35032. Up to 4443 conditions per place. [2024-06-27 21:32:18,853 INFO L140 encePairwiseOnDemand]: 35/43 looper letters, 288 selfloop transitions, 40 changer transitions 0/364 dead transitions. [2024-06-27 21:32:18,854 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 275 places, 364 transitions, 5131 flow [2024-06-27 21:32:18,854 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 21:32:18,855 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 21:32:18,855 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 130 transitions. [2024-06-27 21:32:18,856 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4318936877076412 [2024-06-27 21:32:18,856 INFO L175 Difference]: Start difference. First operand has 269 places, 336 transitions, 4373 flow. Second operand 7 states and 130 transitions. [2024-06-27 21:32:18,856 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 275 places, 364 transitions, 5131 flow [2024-06-27 21:32:19,699 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 272 places, 364 transitions, 5080 flow, removed 3 selfloop flow, removed 3 redundant places. [2024-06-27 21:32:19,703 INFO L231 Difference]: Finished difference. Result has 273 places, 337 transitions, 4424 flow [2024-06-27 21:32:19,703 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=4322, PETRI_DIFFERENCE_MINUEND_PLACES=266, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=336, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=296, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4424, PETRI_PLACES=273, PETRI_TRANSITIONS=337} [2024-06-27 21:32:19,704 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 229 predicate places. [2024-06-27 21:32:19,704 INFO L495 AbstractCegarLoop]: Abstraction has has 273 places, 337 transitions, 4424 flow [2024-06-27 21:32:19,704 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.0) internal successors, (99), 9 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:32:19,704 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:32:19,704 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:32:19,704 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82 [2024-06-27 21:32:19,704 INFO L420 AbstractCegarLoop]: === Iteration 84 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:32:19,705 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:32:19,705 INFO L85 PathProgramCache]: Analyzing trace with hash -1979555176, now seen corresponding path program 3 times [2024-06-27 21:32:19,705 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:32:19,705 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2049405993] [2024-06-27 21:32:19,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:32:19,705 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:32:19,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:32:22,995 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:32:22,995 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:32:22,995 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2049405993] [2024-06-27 21:32:22,995 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2049405993] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:32:22,995 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:32:22,996 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:32:22,996 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [942628738] [2024-06-27 21:32:22,996 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:32:22,996 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:32:22,996 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:32:22,996 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:32:22,996 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:32:23,043 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-27 21:32:23,043 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 273 places, 337 transitions, 4424 flow. Second operand has 10 states, 10 states have (on average 10.8) internal successors, (108), 10 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) [2024-06-27 21:32:23,043 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:32:23,043 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-27 21:32:23,043 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:32:24,883 INFO L124 PetriNetUnfolderBase]: 3099/4989 cut-off events. [2024-06-27 21:32:24,883 INFO L125 PetriNetUnfolderBase]: For 542038/542052 co-relation queries the response was YES. [2024-06-27 21:32:24,925 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35864 conditions, 4989 events. 3099/4989 cut-off events. For 542038/542052 co-relation queries the response was YES. Maximal size of possible extension queue 303. Compared 30120 event pairs, 677 based on Foata normal form. 16/4984 useless extension candidates. Maximal degree in co-relation 35736. Up to 4519 conditions per place. [2024-06-27 21:32:24,944 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 288 selfloop transitions, 43 changer transitions 0/367 dead transitions. [2024-06-27 21:32:24,945 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 280 places, 367 transitions, 5194 flow [2024-06-27 21:32:24,945 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 21:32:24,946 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 21:32:24,946 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 144 transitions. [2024-06-27 21:32:24,946 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4186046511627907 [2024-06-27 21:32:24,946 INFO L175 Difference]: Start difference. First operand has 273 places, 337 transitions, 4424 flow. Second operand 8 states and 144 transitions. [2024-06-27 21:32:24,946 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 280 places, 367 transitions, 5194 flow [2024-06-27 21:32:25,776 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 275 places, 367 transitions, 5112 flow, removed 3 selfloop flow, removed 5 redundant places. [2024-06-27 21:32:25,781 INFO L231 Difference]: Finished difference. Result has 276 places, 338 transitions, 4452 flow [2024-06-27 21:32:25,781 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=4342, PETRI_DIFFERENCE_MINUEND_PLACES=268, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=337, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=42, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=294, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4452, PETRI_PLACES=276, PETRI_TRANSITIONS=338} [2024-06-27 21:32:25,781 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 232 predicate places. [2024-06-27 21:32:25,781 INFO L495 AbstractCegarLoop]: Abstraction has has 276 places, 338 transitions, 4452 flow [2024-06-27 21:32:25,781 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.8) internal successors, (108), 10 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) [2024-06-27 21:32:25,782 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:32:25,782 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:32:25,782 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83 [2024-06-27 21:32:25,782 INFO L420 AbstractCegarLoop]: === Iteration 85 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:32:25,782 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:32:25,782 INFO L85 PathProgramCache]: Analyzing trace with hash 2107767730, now seen corresponding path program 1 times [2024-06-27 21:32:25,783 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:32:25,783 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1144782312] [2024-06-27 21:32:25,783 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:32:25,783 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:32:25,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:32:29,026 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:32:29,026 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:32:29,026 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1144782312] [2024-06-27 21:32:29,027 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1144782312] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:32:29,027 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:32:29,027 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:32:29,027 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2122247886] [2024-06-27 21:32:29,027 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:32:29,027 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:32:29,027 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:32:29,028 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:32:29,028 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:32:29,104 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-27 21:32:29,104 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 276 places, 338 transitions, 4452 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:32:29,104 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:32:29,105 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-27 21:32:29,105 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:32:30,954 INFO L124 PetriNetUnfolderBase]: 3246/5150 cut-off events. [2024-06-27 21:32:30,954 INFO L125 PetriNetUnfolderBase]: For 582495/582497 co-relation queries the response was YES. [2024-06-27 21:32:30,997 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38505 conditions, 5150 events. 3246/5150 cut-off events. For 582495/582497 co-relation queries the response was YES. Maximal size of possible extension queue 300. Compared 30390 event pairs, 752 based on Foata normal form. 4/5154 useless extension candidates. Maximal degree in co-relation 38376. Up to 4814 conditions per place. [2024-06-27 21:32:31,018 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 312 selfloop transitions, 45 changer transitions 0/362 dead transitions. [2024-06-27 21:32:31,018 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 283 places, 362 transitions, 5284 flow [2024-06-27 21:32:31,019 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 21:32:31,019 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 21:32:31,019 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 133 transitions. [2024-06-27 21:32:31,020 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3866279069767442 [2024-06-27 21:32:31,020 INFO L175 Difference]: Start difference. First operand has 276 places, 338 transitions, 4452 flow. Second operand 8 states and 133 transitions. [2024-06-27 21:32:31,020 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 283 places, 362 transitions, 5284 flow [2024-06-27 21:32:31,955 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 277 places, 362 transitions, 5194 flow, removed 4 selfloop flow, removed 6 redundant places. [2024-06-27 21:32:31,967 INFO L231 Difference]: Finished difference. Result has 278 places, 340 transitions, 4523 flow [2024-06-27 21:32:31,967 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=4362, PETRI_DIFFERENCE_MINUEND_PLACES=270, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=338, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=293, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4523, PETRI_PLACES=278, PETRI_TRANSITIONS=340} [2024-06-27 21:32:31,968 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 234 predicate places. [2024-06-27 21:32:31,968 INFO L495 AbstractCegarLoop]: Abstraction has has 278 places, 340 transitions, 4523 flow [2024-06-27 21:32:31,968 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:32:31,968 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:32:31,969 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:32:31,969 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84 [2024-06-27 21:32:31,969 INFO L420 AbstractCegarLoop]: === Iteration 86 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:32:31,969 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:32:31,969 INFO L85 PathProgramCache]: Analyzing trace with hash 1511507066, now seen corresponding path program 4 times [2024-06-27 21:32:31,969 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:32:31,973 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1014280088] [2024-06-27 21:32:31,973 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:32:31,973 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:32:31,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:32:35,169 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:32:35,170 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:32:35,170 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1014280088] [2024-06-27 21:32:35,170 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1014280088] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:32:35,170 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:32:35,170 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:32:35,170 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [624947701] [2024-06-27 21:32:35,170 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:32:35,170 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:32:35,170 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:32:35,170 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:32:35,171 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:32:35,207 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-27 21:32:35,207 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 278 places, 340 transitions, 4523 flow. Second operand has 9 states, 9 states have (on average 11.0) internal successors, (99), 9 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:32:35,207 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:32:35,207 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-27 21:32:35,207 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:32:36,748 INFO L124 PetriNetUnfolderBase]: 3080/4963 cut-off events. [2024-06-27 21:32:36,748 INFO L125 PetriNetUnfolderBase]: For 518358/518370 co-relation queries the response was YES. [2024-06-27 21:32:36,788 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34867 conditions, 4963 events. 3080/4963 cut-off events. For 518358/518370 co-relation queries the response was YES. Maximal size of possible extension queue 304. Compared 30094 event pairs, 708 based on Foata normal form. 14/4964 useless extension candidates. Maximal degree in co-relation 34737. Up to 4563 conditions per place. [2024-06-27 21:32:36,806 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 303 selfloop transitions, 24 changer transitions 0/363 dead transitions. [2024-06-27 21:32:36,807 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 285 places, 363 transitions, 5253 flow [2024-06-27 21:32:36,808 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 21:32:36,808 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 21:32:36,808 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 135 transitions. [2024-06-27 21:32:36,808 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39244186046511625 [2024-06-27 21:32:36,808 INFO L175 Difference]: Start difference. First operand has 278 places, 340 transitions, 4523 flow. Second operand 8 states and 135 transitions. [2024-06-27 21:32:36,808 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 285 places, 363 transitions, 5253 flow [2024-06-27 21:32:37,649 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 279 places, 363 transitions, 5104 flow, removed 31 selfloop flow, removed 6 redundant places. [2024-06-27 21:32:37,653 INFO L231 Difference]: Finished difference. Result has 280 places, 340 transitions, 4428 flow [2024-06-27 21:32:37,653 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=4374, PETRI_DIFFERENCE_MINUEND_PLACES=272, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=340, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=316, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4428, PETRI_PLACES=280, PETRI_TRANSITIONS=340} [2024-06-27 21:32:37,653 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 236 predicate places. [2024-06-27 21:32:37,654 INFO L495 AbstractCegarLoop]: Abstraction has has 280 places, 340 transitions, 4428 flow [2024-06-27 21:32:37,654 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.0) internal successors, (99), 9 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:32:37,654 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:32:37,654 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:32:37,654 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85 [2024-06-27 21:32:37,654 INFO L420 AbstractCegarLoop]: === Iteration 87 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:32:37,655 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:32:37,655 INFO L85 PathProgramCache]: Analyzing trace with hash -2021560432, now seen corresponding path program 2 times [2024-06-27 21:32:37,655 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:32:37,655 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [156891004] [2024-06-27 21:32:37,655 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:32:37,655 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:32:37,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:32:41,065 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:32:41,066 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:32:41,066 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [156891004] [2024-06-27 21:32:41,066 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [156891004] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:32:41,066 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:32:41,066 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:32:41,066 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1135265501] [2024-06-27 21:32:41,066 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:32:41,066 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:32:41,066 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:32:41,066 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:32:41,066 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:32:41,083 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-27 21:32:41,084 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 280 places, 340 transitions, 4428 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:32:41,084 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:32:41,084 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-27 21:32:41,084 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:32:42,576 INFO L124 PetriNetUnfolderBase]: 3221/5101 cut-off events. [2024-06-27 21:32:42,577 INFO L125 PetriNetUnfolderBase]: For 559897/559897 co-relation queries the response was YES. [2024-06-27 21:32:42,616 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37290 conditions, 5101 events. 3221/5101 cut-off events. For 559897/559897 co-relation queries the response was YES. Maximal size of possible extension queue 301. Compared 30105 event pairs, 780 based on Foata normal form. 2/5103 useless extension candidates. Maximal degree in co-relation 37159. Up to 4871 conditions per place. [2024-06-27 21:32:42,634 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 331 selfloop transitions, 26 changer transitions 0/362 dead transitions. [2024-06-27 21:32:42,634 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 288 places, 362 transitions, 5256 flow [2024-06-27 21:32:42,635 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 21:32:42,635 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 21:32:42,636 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 140 transitions. [2024-06-27 21:32:42,636 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36175710594315247 [2024-06-27 21:32:42,636 INFO L175 Difference]: Start difference. First operand has 280 places, 340 transitions, 4428 flow. Second operand 9 states and 140 transitions. [2024-06-27 21:32:42,636 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 288 places, 362 transitions, 5256 flow [2024-06-27 21:32:43,617 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 282 places, 362 transitions, 5199 flow, removed 3 selfloop flow, removed 6 redundant places. [2024-06-27 21:32:43,621 INFO L231 Difference]: Finished difference. Result has 283 places, 342 transitions, 4498 flow [2024-06-27 21:32:43,622 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=4371, PETRI_DIFFERENCE_MINUEND_PLACES=274, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=340, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=314, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4498, PETRI_PLACES=283, PETRI_TRANSITIONS=342} [2024-06-27 21:32:43,622 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 239 predicate places. [2024-06-27 21:32:43,622 INFO L495 AbstractCegarLoop]: Abstraction has has 283 places, 342 transitions, 4498 flow [2024-06-27 21:32:43,622 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:32:43,622 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:32:43,623 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:32:43,623 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86 [2024-06-27 21:32:43,623 INFO L420 AbstractCegarLoop]: === Iteration 88 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:32:43,623 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:32:43,623 INFO L85 PathProgramCache]: Analyzing trace with hash -262419788, now seen corresponding path program 3 times [2024-06-27 21:32:43,623 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:32:43,623 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [840877454] [2024-06-27 21:32:43,623 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:32:43,624 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:32:43,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:32:46,887 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:32:46,887 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:32:46,888 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [840877454] [2024-06-27 21:32:46,888 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [840877454] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:32:46,888 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:32:46,888 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:32:46,888 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [690681358] [2024-06-27 21:32:46,888 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:32:46,888 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:32:46,889 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:32:46,889 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:32:46,889 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:32:46,942 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-27 21:32:46,943 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 283 places, 342 transitions, 4498 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:32:46,943 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:32:46,943 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-27 21:32:46,943 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:32:48,824 INFO L124 PetriNetUnfolderBase]: 3229/5113 cut-off events. [2024-06-27 21:32:48,824 INFO L125 PetriNetUnfolderBase]: For 573916/573916 co-relation queries the response was YES. [2024-06-27 21:32:48,866 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37565 conditions, 5113 events. 3229/5113 cut-off events. For 573916/573916 co-relation queries the response was YES. Maximal size of possible extension queue 303. Compared 30172 event pairs, 782 based on Foata normal form. 2/5115 useless extension candidates. Maximal degree in co-relation 37433. Up to 4883 conditions per place. [2024-06-27 21:32:48,886 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 334 selfloop transitions, 26 changer transitions 0/365 dead transitions. [2024-06-27 21:32:48,886 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 292 places, 365 transitions, 5338 flow [2024-06-27 21:32:48,887 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 21:32:48,887 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 21:32:48,888 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 151 transitions. [2024-06-27 21:32:48,888 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3511627906976744 [2024-06-27 21:32:48,888 INFO L175 Difference]: Start difference. First operand has 283 places, 342 transitions, 4498 flow. Second operand 10 states and 151 transitions. [2024-06-27 21:32:48,888 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 292 places, 365 transitions, 5338 flow [2024-06-27 21:32:49,928 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 285 places, 365 transitions, 5227 flow, removed 31 selfloop flow, removed 7 redundant places. [2024-06-27 21:32:49,932 INFO L231 Difference]: Finished difference. Result has 286 places, 344 transitions, 4518 flow [2024-06-27 21:32:49,933 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=4387, PETRI_DIFFERENCE_MINUEND_PLACES=276, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=342, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=316, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=4518, PETRI_PLACES=286, PETRI_TRANSITIONS=344} [2024-06-27 21:32:49,933 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 242 predicate places. [2024-06-27 21:32:49,933 INFO L495 AbstractCegarLoop]: Abstraction has has 286 places, 344 transitions, 4518 flow [2024-06-27 21:32:49,933 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:32:49,933 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:32:49,933 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:32:49,933 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable87 [2024-06-27 21:32:49,934 INFO L420 AbstractCegarLoop]: === Iteration 89 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:32:49,934 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:32:49,934 INFO L85 PathProgramCache]: Analyzing trace with hash -32434508, now seen corresponding path program 4 times [2024-06-27 21:32:49,934 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:32:49,934 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [865791248] [2024-06-27 21:32:49,934 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:32:49,934 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:32:49,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:32:53,400 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:32:53,400 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:32:53,400 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [865791248] [2024-06-27 21:32:53,401 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [865791248] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:32:53,401 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:32:53,401 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:32:53,401 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1308503493] [2024-06-27 21:32:53,401 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:32:53,401 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:32:53,401 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:32:53,402 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:32:53,402 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:32:53,424 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-27 21:32:53,425 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 286 places, 344 transitions, 4518 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:32:53,425 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:32:53,425 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-27 21:32:53,425 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:32:55,207 INFO L124 PetriNetUnfolderBase]: 3298/5218 cut-off events. [2024-06-27 21:32:55,207 INFO L125 PetriNetUnfolderBase]: For 606963/606963 co-relation queries the response was YES. [2024-06-27 21:32:55,250 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38680 conditions, 5218 events. 3298/5218 cut-off events. For 606963/606963 co-relation queries the response was YES. Maximal size of possible extension queue 305. Compared 30775 event pairs, 785 based on Foata normal form. 2/5220 useless extension candidates. Maximal degree in co-relation 38547. Up to 4860 conditions per place. [2024-06-27 21:32:55,269 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 339 selfloop transitions, 31 changer transitions 0/375 dead transitions. [2024-06-27 21:32:55,270 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 295 places, 375 transitions, 5619 flow [2024-06-27 21:32:55,270 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 21:32:55,271 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 21:32:55,271 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 157 transitions. [2024-06-27 21:32:55,271 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36511627906976746 [2024-06-27 21:32:55,271 INFO L175 Difference]: Start difference. First operand has 286 places, 344 transitions, 4518 flow. Second operand 10 states and 157 transitions. [2024-06-27 21:32:55,271 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 295 places, 375 transitions, 5619 flow [2024-06-27 21:32:56,553 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 287 places, 375 transitions, 5504 flow, removed 33 selfloop flow, removed 8 redundant places. [2024-06-27 21:32:56,558 INFO L231 Difference]: Finished difference. Result has 289 places, 348 transitions, 4591 flow [2024-06-27 21:32:56,558 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=4403, PETRI_DIFFERENCE_MINUEND_PLACES=278, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=344, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=314, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=4591, PETRI_PLACES=289, PETRI_TRANSITIONS=348} [2024-06-27 21:32:56,558 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 245 predicate places. [2024-06-27 21:32:56,559 INFO L495 AbstractCegarLoop]: Abstraction has has 289 places, 348 transitions, 4591 flow [2024-06-27 21:32:56,559 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:32:56,559 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:32:56,559 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:32:56,559 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable88 [2024-06-27 21:32:56,559 INFO L420 AbstractCegarLoop]: === Iteration 90 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:32:56,559 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:32:56,560 INFO L85 PathProgramCache]: Analyzing trace with hash -1595764283, now seen corresponding path program 1 times [2024-06-27 21:32:56,560 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:32:56,560 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1490536687] [2024-06-27 21:32:56,560 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:32:56,560 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:32:56,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:32:59,180 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:32:59,180 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:32:59,180 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1490536687] [2024-06-27 21:32:59,180 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1490536687] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:32:59,180 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:32:59,181 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:32:59,181 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [463592827] [2024-06-27 21:32:59,181 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:32:59,181 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:32:59,181 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:32:59,181 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:32:59,181 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:32:59,212 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-27 21:32:59,212 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 289 places, 348 transitions, 4591 flow. Second operand has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:32:59,212 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:32:59,212 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-27 21:32:59,212 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:33:01,132 INFO L124 PetriNetUnfolderBase]: 3306/5239 cut-off events. [2024-06-27 21:33:01,133 INFO L125 PetriNetUnfolderBase]: For 622664/622664 co-relation queries the response was YES. [2024-06-27 21:33:01,175 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39015 conditions, 5239 events. 3306/5239 cut-off events. For 622664/622664 co-relation queries the response was YES. Maximal size of possible extension queue 306. Compared 30983 event pairs, 711 based on Foata normal form. 2/5241 useless extension candidates. Maximal degree in co-relation 38880. Up to 4935 conditions per place. [2024-06-27 21:33:01,194 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 354 selfloop transitions, 29 changer transitions 0/388 dead transitions. [2024-06-27 21:33:01,195 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 296 places, 388 transitions, 5699 flow [2024-06-27 21:33:01,195 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 21:33:01,196 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 21:33:01,196 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 145 transitions. [2024-06-27 21:33:01,196 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42151162790697677 [2024-06-27 21:33:01,196 INFO L175 Difference]: Start difference. First operand has 289 places, 348 transitions, 4591 flow. Second operand 8 states and 145 transitions. [2024-06-27 21:33:01,196 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 296 places, 388 transitions, 5699 flow [2024-06-27 21:33:02,274 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 290 places, 388 transitions, 5599 flow, removed 35 selfloop flow, removed 6 redundant places. [2024-06-27 21:33:02,278 INFO L231 Difference]: Finished difference. Result has 291 places, 352 transitions, 4622 flow [2024-06-27 21:33:02,279 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=4491, PETRI_DIFFERENCE_MINUEND_PLACES=283, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=348, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=321, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4622, PETRI_PLACES=291, PETRI_TRANSITIONS=352} [2024-06-27 21:33:02,279 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 247 predicate places. [2024-06-27 21:33:02,279 INFO L495 AbstractCegarLoop]: Abstraction has has 291 places, 352 transitions, 4622 flow [2024-06-27 21:33:02,279 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:33:02,279 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:33:02,280 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:33:02,280 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable89 [2024-06-27 21:33:02,280 INFO L420 AbstractCegarLoop]: === Iteration 91 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:33:02,280 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:33:02,280 INFO L85 PathProgramCache]: Analyzing trace with hash -1587193403, now seen corresponding path program 2 times [2024-06-27 21:33:02,280 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:33:02,280 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [475640714] [2024-06-27 21:33:02,280 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:33:02,281 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:33:02,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:33:04,993 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:33:04,993 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:33:04,993 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [475640714] [2024-06-27 21:33:04,993 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [475640714] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:33:04,993 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:33:04,993 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:33:04,993 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1910475466] [2024-06-27 21:33:04,993 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:33:04,993 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:33:04,993 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:33:04,994 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:33:04,994 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:33:05,014 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-27 21:33:05,014 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 291 places, 352 transitions, 4622 flow. Second operand has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:33:05,014 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:33:05,014 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-27 21:33:05,014 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:33:06,888 INFO L124 PetriNetUnfolderBase]: 3319/5252 cut-off events. [2024-06-27 21:33:06,888 INFO L125 PetriNetUnfolderBase]: For 635326/635326 co-relation queries the response was YES. [2024-06-27 21:33:06,931 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39371 conditions, 5252 events. 3319/5252 cut-off events. For 635326/635326 co-relation queries the response was YES. Maximal size of possible extension queue 309. Compared 31115 event pairs, 826 based on Foata normal form. 2/5254 useless extension candidates. Maximal degree in co-relation 39234. Up to 5004 conditions per place. [2024-06-27 21:33:06,949 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 353 selfloop transitions, 29 changer transitions 0/387 dead transitions. [2024-06-27 21:33:06,950 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 298 places, 387 transitions, 5544 flow [2024-06-27 21:33:06,950 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 21:33:06,951 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 21:33:06,951 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 139 transitions. [2024-06-27 21:33:06,951 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40406976744186046 [2024-06-27 21:33:06,951 INFO L175 Difference]: Start difference. First operand has 291 places, 352 transitions, 4622 flow. Second operand 8 states and 139 transitions. [2024-06-27 21:33:06,951 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 298 places, 387 transitions, 5544 flow [2024-06-27 21:33:08,046 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 294 places, 387 transitions, 5380 flow, removed 31 selfloop flow, removed 4 redundant places. [2024-06-27 21:33:08,051 INFO L231 Difference]: Finished difference. Result has 295 places, 357 transitions, 4597 flow [2024-06-27 21:33:08,051 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=4472, PETRI_DIFFERENCE_MINUEND_PLACES=287, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=352, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=326, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4597, PETRI_PLACES=295, PETRI_TRANSITIONS=357} [2024-06-27 21:33:08,051 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 251 predicate places. [2024-06-27 21:33:08,051 INFO L495 AbstractCegarLoop]: Abstraction has has 295 places, 357 transitions, 4597 flow [2024-06-27 21:33:08,051 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:33:08,052 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:33:08,052 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:33:08,052 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90 [2024-06-27 21:33:08,052 INFO L420 AbstractCegarLoop]: === Iteration 92 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:33:08,052 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:33:08,052 INFO L85 PathProgramCache]: Analyzing trace with hash 800880681, now seen corresponding path program 1 times [2024-06-27 21:33:08,052 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:33:08,052 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [427325059] [2024-06-27 21:33:08,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:33:08,053 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:33:08,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:33:10,795 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:33:10,796 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:33:10,796 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [427325059] [2024-06-27 21:33:10,796 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [427325059] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:33:10,796 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:33:10,796 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:33:10,796 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1180540646] [2024-06-27 21:33:10,796 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:33:10,796 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:33:10,796 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:33:10,796 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:33:10,796 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:33:10,841 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-27 21:33:10,841 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 295 places, 357 transitions, 4597 flow. Second operand has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:33:10,841 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:33:10,841 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-27 21:33:10,841 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:33:12,751 INFO L124 PetriNetUnfolderBase]: 3340/5289 cut-off events. [2024-06-27 21:33:12,752 INFO L125 PetriNetUnfolderBase]: For 651940/651940 co-relation queries the response was YES. [2024-06-27 21:33:12,794 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39877 conditions, 5289 events. 3340/5289 cut-off events. For 651940/651940 co-relation queries the response was YES. Maximal size of possible extension queue 313. Compared 31424 event pairs, 828 based on Foata normal form. 1/5290 useless extension candidates. Maximal degree in co-relation 39739. Up to 4970 conditions per place. [2024-06-27 21:33:12,814 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 349 selfloop transitions, 49 changer transitions 0/403 dead transitions. [2024-06-27 21:33:12,814 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 303 places, 403 transitions, 5805 flow [2024-06-27 21:33:12,815 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 21:33:12,815 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 21:33:12,816 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 163 transitions. [2024-06-27 21:33:12,816 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42118863049095606 [2024-06-27 21:33:12,816 INFO L175 Difference]: Start difference. First operand has 295 places, 357 transitions, 4597 flow. Second operand 9 states and 163 transitions. [2024-06-27 21:33:12,816 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 303 places, 403 transitions, 5805 flow [2024-06-27 21:33:13,629 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 298 places, 403 transitions, 5734 flow, removed 9 selfloop flow, removed 5 redundant places. [2024-06-27 21:33:13,634 INFO L231 Difference]: Finished difference. Result has 300 places, 363 transitions, 4771 flow [2024-06-27 21:33:13,635 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=4526, PETRI_DIFFERENCE_MINUEND_PLACES=290, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=357, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=45, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=310, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4771, PETRI_PLACES=300, PETRI_TRANSITIONS=363} [2024-06-27 21:33:13,635 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 256 predicate places. [2024-06-27 21:33:13,635 INFO L495 AbstractCegarLoop]: Abstraction has has 300 places, 363 transitions, 4771 flow [2024-06-27 21:33:13,635 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:33:13,635 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:33:13,635 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:33:13,635 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91 [2024-06-27 21:33:13,636 INFO L420 AbstractCegarLoop]: === Iteration 93 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:33:13,636 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:33:13,636 INFO L85 PathProgramCache]: Analyzing trace with hash -2011335543, now seen corresponding path program 3 times [2024-06-27 21:33:13,636 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:33:13,636 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [236546584] [2024-06-27 21:33:13,636 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:33:13,636 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:33:13,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:33:16,289 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:33:16,289 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:33:16,289 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [236546584] [2024-06-27 21:33:16,289 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [236546584] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:33:16,289 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:33:16,289 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:33:16,289 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [896540458] [2024-06-27 21:33:16,290 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:33:16,290 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:33:16,290 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:33:16,290 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:33:16,290 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:33:16,310 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-27 21:33:16,310 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 300 places, 363 transitions, 4771 flow. Second operand has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:33:16,310 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:33:16,310 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-27 21:33:16,311 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:33:17,998 INFO L124 PetriNetUnfolderBase]: 3348/5305 cut-off events. [2024-06-27 21:33:17,998 INFO L125 PetriNetUnfolderBase]: For 673346/673346 co-relation queries the response was YES. [2024-06-27 21:33:18,041 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40686 conditions, 5305 events. 3348/5305 cut-off events. For 673346/673346 co-relation queries the response was YES. Maximal size of possible extension queue 314. Compared 31579 event pairs, 834 based on Foata normal form. 2/5307 useless extension candidates. Maximal degree in co-relation 40546. Up to 5045 conditions per place. [2024-06-27 21:33:18,059 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 355 selfloop transitions, 29 changer transitions 0/389 dead transitions. [2024-06-27 21:33:18,059 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 307 places, 389 transitions, 5654 flow [2024-06-27 21:33:18,060 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 21:33:18,060 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 21:33:18,061 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 132 transitions. [2024-06-27 21:33:18,061 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38372093023255816 [2024-06-27 21:33:18,061 INFO L175 Difference]: Start difference. First operand has 300 places, 363 transitions, 4771 flow. Second operand 8 states and 132 transitions. [2024-06-27 21:33:18,061 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 307 places, 389 transitions, 5654 flow [2024-06-27 21:33:19,031 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 303 places, 389 transitions, 5510 flow, removed 55 selfloop flow, removed 4 redundant places. [2024-06-27 21:33:19,035 INFO L231 Difference]: Finished difference. Result has 305 places, 366 transitions, 4754 flow [2024-06-27 21:33:19,036 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=4629, PETRI_DIFFERENCE_MINUEND_PLACES=296, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=363, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=334, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4754, PETRI_PLACES=305, PETRI_TRANSITIONS=366} [2024-06-27 21:33:19,036 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 261 predicate places. [2024-06-27 21:33:19,036 INFO L495 AbstractCegarLoop]: Abstraction has has 305 places, 366 transitions, 4754 flow [2024-06-27 21:33:19,036 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:33:19,036 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:33:19,036 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:33:19,036 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92 [2024-06-27 21:33:19,037 INFO L420 AbstractCegarLoop]: === Iteration 94 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:33:19,037 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:33:19,037 INFO L85 PathProgramCache]: Analyzing trace with hash 1081810985, now seen corresponding path program 2 times [2024-06-27 21:33:19,037 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:33:19,037 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1145147020] [2024-06-27 21:33:19,037 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:33:19,037 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:33:19,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:33:21,715 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:33:21,715 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:33:21,715 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1145147020] [2024-06-27 21:33:21,715 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1145147020] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:33:21,716 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:33:21,716 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:33:21,716 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [487602141] [2024-06-27 21:33:21,716 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:33:21,716 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:33:21,716 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:33:21,717 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:33:21,717 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:33:21,728 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-27 21:33:21,728 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 305 places, 366 transitions, 4754 flow. Second operand has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:33:21,728 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:33:21,728 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-27 21:33:21,728 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:33:23,728 INFO L124 PetriNetUnfolderBase]: 3361/5336 cut-off events. [2024-06-27 21:33:23,728 INFO L125 PetriNetUnfolderBase]: For 687481/687483 co-relation queries the response was YES. [2024-06-27 21:33:23,775 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41133 conditions, 5336 events. 3361/5336 cut-off events. For 687481/687483 co-relation queries the response was YES. Maximal size of possible extension queue 319. Compared 31744 event pairs, 711 based on Foata normal form. 3/5339 useless extension candidates. Maximal degree in co-relation 40990. Up to 4445 conditions per place. [2024-06-27 21:33:23,795 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 284 selfloop transitions, 121 changer transitions 0/410 dead transitions. [2024-06-27 21:33:23,796 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 312 places, 410 transitions, 6302 flow [2024-06-27 21:33:23,797 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 21:33:23,797 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 21:33:23,797 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 150 transitions. [2024-06-27 21:33:23,797 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.436046511627907 [2024-06-27 21:33:23,798 INFO L175 Difference]: Start difference. First operand has 305 places, 366 transitions, 4754 flow. Second operand 8 states and 150 transitions. [2024-06-27 21:33:23,798 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 312 places, 410 transitions, 6302 flow [2024-06-27 21:33:24,679 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 305 places, 410 transitions, 6111 flow, removed 25 selfloop flow, removed 7 redundant places. [2024-06-27 21:33:24,684 INFO L231 Difference]: Finished difference. Result has 308 places, 375 transitions, 5140 flow [2024-06-27 21:33:24,684 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=4577, PETRI_DIFFERENCE_MINUEND_PLACES=298, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=366, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=114, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=250, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5140, PETRI_PLACES=308, PETRI_TRANSITIONS=375} [2024-06-27 21:33:24,684 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 264 predicate places. [2024-06-27 21:33:24,684 INFO L495 AbstractCegarLoop]: Abstraction has has 308 places, 375 transitions, 5140 flow [2024-06-27 21:33:24,685 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:33:24,685 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:33:24,685 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:33:24,685 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93 [2024-06-27 21:33:24,686 INFO L420 AbstractCegarLoop]: === Iteration 95 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:33:24,686 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:33:24,686 INFO L85 PathProgramCache]: Analyzing trace with hash 1092286505, now seen corresponding path program 3 times [2024-06-27 21:33:24,686 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:33:24,686 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [870906982] [2024-06-27 21:33:24,686 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:33:24,686 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:33:24,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:33:27,742 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:33:27,743 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:33:27,743 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [870906982] [2024-06-27 21:33:27,743 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [870906982] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:33:27,743 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:33:27,743 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:33:27,743 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1091266524] [2024-06-27 21:33:27,743 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:33:27,743 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:33:27,743 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:33:27,743 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:33:27,744 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:33:27,753 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-27 21:33:27,753 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 308 places, 375 transitions, 5140 flow. Second operand has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:33:27,753 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:33:27,753 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-27 21:33:27,753 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:33:29,830 INFO L124 PetriNetUnfolderBase]: 3366/5345 cut-off events. [2024-06-27 21:33:29,830 INFO L125 PetriNetUnfolderBase]: For 704730/704732 co-relation queries the response was YES. [2024-06-27 21:33:29,878 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41941 conditions, 5345 events. 3366/5345 cut-off events. For 704730/704732 co-relation queries the response was YES. Maximal size of possible extension queue 321. Compared 31884 event pairs, 705 based on Foata normal form. 3/5348 useless extension candidates. Maximal degree in co-relation 41797. Up to 4449 conditions per place. [2024-06-27 21:33:29,898 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 281 selfloop transitions, 123 changer transitions 0/409 dead transitions. [2024-06-27 21:33:29,898 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 315 places, 409 transitions, 6554 flow [2024-06-27 21:33:29,899 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 21:33:29,899 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 21:33:29,899 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 146 transitions. [2024-06-27 21:33:29,899 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42441860465116277 [2024-06-27 21:33:29,899 INFO L175 Difference]: Start difference. First operand has 308 places, 375 transitions, 5140 flow. Second operand 8 states and 146 transitions. [2024-06-27 21:33:29,899 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 315 places, 409 transitions, 6554 flow [2024-06-27 21:33:31,228 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 312 places, 409 transitions, 6359 flow, removed 71 selfloop flow, removed 3 redundant places. [2024-06-27 21:33:31,233 INFO L231 Difference]: Finished difference. Result has 313 places, 378 transitions, 5289 flow [2024-06-27 21:33:31,234 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=4973, PETRI_DIFFERENCE_MINUEND_PLACES=305, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=375, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=120, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=255, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5289, PETRI_PLACES=313, PETRI_TRANSITIONS=378} [2024-06-27 21:33:31,234 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 269 predicate places. [2024-06-27 21:33:31,234 INFO L495 AbstractCegarLoop]: Abstraction has has 313 places, 378 transitions, 5289 flow [2024-06-27 21:33:31,234 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:33:31,234 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:33:31,234 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:33:31,234 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94 [2024-06-27 21:33:31,235 INFO L420 AbstractCegarLoop]: === Iteration 96 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:33:31,235 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:33:31,235 INFO L85 PathProgramCache]: Analyzing trace with hash -105388699, now seen corresponding path program 4 times [2024-06-27 21:33:31,235 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:33:31,235 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1598574460] [2024-06-27 21:33:31,235 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:33:31,235 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:33:31,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:33:34,009 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:33:34,009 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:33:34,010 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1598574460] [2024-06-27 21:33:34,010 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1598574460] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:33:34,010 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:33:34,010 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:33:34,010 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [654049236] [2024-06-27 21:33:34,010 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:33:34,010 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:33:34,010 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:33:34,011 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:33:34,011 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:33:34,030 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-27 21:33:34,030 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 313 places, 378 transitions, 5289 flow. Second operand has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:33:34,030 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:33:34,030 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-27 21:33:34,030 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:33:35,900 INFO L124 PetriNetUnfolderBase]: 3387/5369 cut-off events. [2024-06-27 21:33:35,900 INFO L125 PetriNetUnfolderBase]: For 726463/726463 co-relation queries the response was YES. [2024-06-27 21:33:35,947 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42422 conditions, 5369 events. 3387/5369 cut-off events. For 726463/726463 co-relation queries the response was YES. Maximal size of possible extension queue 325. Compared 32097 event pairs, 833 based on Foata normal form. 1/5370 useless extension candidates. Maximal degree in co-relation 42276. Up to 5069 conditions per place. [2024-06-27 21:33:35,967 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 361 selfloop transitions, 43 changer transitions 0/409 dead transitions. [2024-06-27 21:33:35,967 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 321 places, 409 transitions, 6478 flow [2024-06-27 21:33:35,968 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 21:33:35,968 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 21:33:35,969 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 148 transitions. [2024-06-27 21:33:35,969 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38242894056847543 [2024-06-27 21:33:35,969 INFO L175 Difference]: Start difference. First operand has 313 places, 378 transitions, 5289 flow. Second operand 9 states and 148 transitions. [2024-06-27 21:33:35,969 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 321 places, 409 transitions, 6478 flow [2024-06-27 21:33:37,796 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 316 places, 409 transitions, 6209 flow, removed 24 selfloop flow, removed 5 redundant places. [2024-06-27 21:33:37,802 INFO L231 Difference]: Finished difference. Result has 318 places, 384 transitions, 5258 flow [2024-06-27 21:33:37,802 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=5029, PETRI_DIFFERENCE_MINUEND_PLACES=308, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=378, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=335, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5258, PETRI_PLACES=318, PETRI_TRANSITIONS=384} [2024-06-27 21:33:37,802 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 274 predicate places. [2024-06-27 21:33:37,802 INFO L495 AbstractCegarLoop]: Abstraction has has 318 places, 384 transitions, 5258 flow [2024-06-27 21:33:37,802 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:33:37,802 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:33:37,803 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:33:37,803 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable95 [2024-06-27 21:33:37,803 INFO L420 AbstractCegarLoop]: === Iteration 97 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:33:37,803 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:33:37,803 INFO L85 PathProgramCache]: Analyzing trace with hash -1305210494, now seen corresponding path program 1 times [2024-06-27 21:33:37,803 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:33:37,803 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [60682505] [2024-06-27 21:33:37,804 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:33:37,804 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:33:37,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:33:40,015 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:33:40,016 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:33:40,016 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [60682505] [2024-06-27 21:33:40,016 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [60682505] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:33:40,016 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:33:40,016 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:33:40,016 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1970544843] [2024-06-27 21:33:40,016 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:33:40,017 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:33:40,017 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:33:40,017 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:33:40,017 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:33:40,042 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-27 21:33:40,043 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 318 places, 384 transitions, 5258 flow. Second operand has 9 states, 9 states have (on average 10.0) internal successors, (90), 9 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:33:40,043 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:33:40,043 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-27 21:33:40,043 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:33:42,076 INFO L124 PetriNetUnfolderBase]: 3503/5543 cut-off events. [2024-06-27 21:33:42,076 INFO L125 PetriNetUnfolderBase]: For 807532/807538 co-relation queries the response was YES. [2024-06-27 21:33:42,124 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44494 conditions, 5543 events. 3503/5543 cut-off events. For 807532/807538 co-relation queries the response was YES. Maximal size of possible extension queue 335. Compared 33100 event pairs, 730 based on Foata normal form. 10/5553 useless extension candidates. Maximal degree in co-relation 44346. Up to 4544 conditions per place. [2024-06-27 21:33:42,143 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 273 selfloop transitions, 154 changer transitions 0/432 dead transitions. [2024-06-27 21:33:42,144 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 325 places, 432 transitions, 6792 flow [2024-06-27 21:33:42,145 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 21:33:42,145 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 21:33:42,145 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 153 transitions. [2024-06-27 21:33:42,145 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44476744186046513 [2024-06-27 21:33:42,145 INFO L175 Difference]: Start difference. First operand has 318 places, 384 transitions, 5258 flow. Second operand 8 states and 153 transitions. [2024-06-27 21:33:42,145 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 325 places, 432 transitions, 6792 flow [2024-06-27 21:33:43,900 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 319 places, 432 transitions, 6661 flow, removed 30 selfloop flow, removed 6 redundant places. [2024-06-27 21:33:43,905 INFO L231 Difference]: Finished difference. Result has 320 places, 396 transitions, 5647 flow [2024-06-27 21:33:43,906 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=5127, PETRI_DIFFERENCE_MINUEND_PLACES=312, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=384, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=142, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=242, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5647, PETRI_PLACES=320, PETRI_TRANSITIONS=396} [2024-06-27 21:33:43,906 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 276 predicate places. [2024-06-27 21:33:43,906 INFO L495 AbstractCegarLoop]: Abstraction has has 320 places, 396 transitions, 5647 flow [2024-06-27 21:33:43,906 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.0) internal successors, (90), 9 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:33:43,906 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:33:43,906 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:33:43,906 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable96 [2024-06-27 21:33:43,907 INFO L420 AbstractCegarLoop]: === Iteration 98 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:33:43,907 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:33:43,907 INFO L85 PathProgramCache]: Analyzing trace with hash 1359046696, now seen corresponding path program 2 times [2024-06-27 21:33:43,907 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:33:43,907 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [552114223] [2024-06-27 21:33:43,907 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:33:43,907 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:33:43,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:33:46,605 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:33:46,605 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:33:46,605 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [552114223] [2024-06-27 21:33:46,605 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [552114223] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:33:46,605 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:33:46,606 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:33:46,606 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [220764753] [2024-06-27 21:33:46,606 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:33:46,606 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:33:46,606 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:33:46,606 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:33:46,606 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:33:46,643 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-27 21:33:46,643 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 320 places, 396 transitions, 5647 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:33:46,643 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:33:46,643 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-27 21:33:46,643 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:33:49,198 INFO L124 PetriNetUnfolderBase]: 3555/5616 cut-off events. [2024-06-27 21:33:49,199 INFO L125 PetriNetUnfolderBase]: For 847816/847818 co-relation queries the response was YES. [2024-06-27 21:33:49,247 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46096 conditions, 5616 events. 3555/5616 cut-off events. For 847816/847818 co-relation queries the response was YES. Maximal size of possible extension queue 340. Compared 33480 event pairs, 753 based on Foata normal form. 6/5622 useless extension candidates. Maximal degree in co-relation 45947. Up to 4584 conditions per place. [2024-06-27 21:33:49,267 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 281 selfloop transitions, 154 changer transitions 0/440 dead transitions. [2024-06-27 21:33:49,267 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 328 places, 440 transitions, 7117 flow [2024-06-27 21:33:49,267 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 21:33:49,268 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 21:33:49,268 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 168 transitions. [2024-06-27 21:33:49,268 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43410852713178294 [2024-06-27 21:33:49,268 INFO L175 Difference]: Start difference. First operand has 320 places, 396 transitions, 5647 flow. Second operand 9 states and 168 transitions. [2024-06-27 21:33:49,268 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 328 places, 440 transitions, 7117 flow [2024-06-27 21:33:51,160 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 324 places, 440 transitions, 6923 flow, removed 19 selfloop flow, removed 4 redundant places. [2024-06-27 21:33:51,165 INFO L231 Difference]: Finished difference. Result has 325 places, 402 transitions, 5885 flow [2024-06-27 21:33:51,166 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=5463, PETRI_DIFFERENCE_MINUEND_PLACES=316, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=396, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=148, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=248, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5885, PETRI_PLACES=325, PETRI_TRANSITIONS=402} [2024-06-27 21:33:51,172 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 281 predicate places. [2024-06-27 21:33:51,172 INFO L495 AbstractCegarLoop]: Abstraction has has 325 places, 402 transitions, 5885 flow [2024-06-27 21:33:51,173 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:33:51,173 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:33:51,173 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:33:51,173 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable97 [2024-06-27 21:33:51,173 INFO L420 AbstractCegarLoop]: === Iteration 99 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:33:51,173 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:33:51,174 INFO L85 PathProgramCache]: Analyzing trace with hash 1359052276, now seen corresponding path program 3 times [2024-06-27 21:33:51,174 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:33:51,174 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [475559201] [2024-06-27 21:33:51,174 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:33:51,174 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:33:51,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:33:53,897 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:33:53,898 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:33:53,898 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [475559201] [2024-06-27 21:33:53,898 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [475559201] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:33:53,898 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:33:53,898 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:33:53,898 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [973729053] [2024-06-27 21:33:53,898 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:33:53,899 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:33:53,899 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:33:53,899 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:33:53,900 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:33:53,924 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-27 21:33:53,924 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 325 places, 402 transitions, 5885 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:33:53,925 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:33:53,925 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-27 21:33:53,925 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:33:56,525 INFO L124 PetriNetUnfolderBase]: 3543/5602 cut-off events. [2024-06-27 21:33:56,526 INFO L125 PetriNetUnfolderBase]: For 848467/848469 co-relation queries the response was YES. [2024-06-27 21:33:56,577 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45825 conditions, 5602 events. 3543/5602 cut-off events. For 848467/848469 co-relation queries the response was YES. Maximal size of possible extension queue 340. Compared 33412 event pairs, 754 based on Foata normal form. 6/5608 useless extension candidates. Maximal degree in co-relation 45675. Up to 4576 conditions per place. [2024-06-27 21:33:56,598 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 282 selfloop transitions, 155 changer transitions 0/442 dead transitions. [2024-06-27 21:33:56,598 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 335 places, 442 transitions, 7055 flow [2024-06-27 21:33:56,599 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-27 21:33:56,599 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-27 21:33:56,599 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 190 transitions. [2024-06-27 21:33:56,599 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40169133192389006 [2024-06-27 21:33:56,600 INFO L175 Difference]: Start difference. First operand has 325 places, 402 transitions, 5885 flow. Second operand 11 states and 190 transitions. [2024-06-27 21:33:56,600 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 335 places, 442 transitions, 7055 flow [2024-06-27 21:33:58,513 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 329 places, 442 transitions, 6693 flow, removed 28 selfloop flow, removed 6 redundant places. [2024-06-27 21:33:58,519 INFO L231 Difference]: Finished difference. Result has 330 places, 402 transitions, 5839 flow [2024-06-27 21:33:58,519 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=5523, PETRI_DIFFERENCE_MINUEND_PLACES=319, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=402, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=155, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=247, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=5839, PETRI_PLACES=330, PETRI_TRANSITIONS=402} [2024-06-27 21:33:58,527 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 286 predicate places. [2024-06-27 21:33:58,527 INFO L495 AbstractCegarLoop]: Abstraction has has 330 places, 402 transitions, 5839 flow [2024-06-27 21:33:58,527 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:33:58,527 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:33:58,527 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:33:58,528 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable98 [2024-06-27 21:33:58,528 INFO L420 AbstractCegarLoop]: === Iteration 100 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:33:58,528 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:33:58,528 INFO L85 PathProgramCache]: Analyzing trace with hash -1157393504, now seen corresponding path program 4 times [2024-06-27 21:33:58,528 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:33:58,528 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [464742285] [2024-06-27 21:33:58,528 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:33:58,529 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:33:58,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:34:00,990 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:34:00,990 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:34:00,990 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [464742285] [2024-06-27 21:34:00,990 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [464742285] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:34:00,990 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:34:00,991 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:34:00,991 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [773768377] [2024-06-27 21:34:00,991 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:34:00,991 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:34:00,991 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:34:00,991 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:34:00,991 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:34:01,017 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-27 21:34:01,018 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 330 places, 402 transitions, 5839 flow. Second operand has 9 states, 9 states have (on average 10.0) internal successors, (90), 9 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:34:01,018 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:34:01,018 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-27 21:34:01,018 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:34:02,973 INFO L124 PetriNetUnfolderBase]: 3583/5635 cut-off events. [2024-06-27 21:34:02,974 INFO L125 PetriNetUnfolderBase]: For 883263/883263 co-relation queries the response was YES. [2024-06-27 21:34:03,031 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46137 conditions, 5635 events. 3583/5635 cut-off events. For 883263/883263 co-relation queries the response was YES. Maximal size of possible extension queue 343. Compared 33499 event pairs, 814 based on Foata normal form. 8/5643 useless extension candidates. Maximal degree in co-relation 45986. Up to 5185 conditions per place. [2024-06-27 21:34:03,058 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 363 selfloop transitions, 75 changer transitions 0/443 dead transitions. [2024-06-27 21:34:03,058 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 339 places, 443 transitions, 7137 flow [2024-06-27 21:34:03,059 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 21:34:03,059 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 21:34:03,059 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 173 transitions. [2024-06-27 21:34:03,059 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40232558139534885 [2024-06-27 21:34:03,059 INFO L175 Difference]: Start difference. First operand has 330 places, 402 transitions, 5839 flow. Second operand 10 states and 173 transitions. [2024-06-27 21:34:03,060 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 339 places, 443 transitions, 7137 flow [2024-06-27 21:34:04,916 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 329 places, 443 transitions, 6809 flow, removed 2 selfloop flow, removed 10 redundant places. [2024-06-27 21:34:04,923 INFO L231 Difference]: Finished difference. Result has 330 places, 408 transitions, 5765 flow [2024-06-27 21:34:04,923 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=5521, PETRI_DIFFERENCE_MINUEND_PLACES=320, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=402, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=69, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=333, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=5765, PETRI_PLACES=330, PETRI_TRANSITIONS=408} [2024-06-27 21:34:04,924 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 286 predicate places. [2024-06-27 21:34:04,924 INFO L495 AbstractCegarLoop]: Abstraction has has 330 places, 408 transitions, 5765 flow [2024-06-27 21:34:04,924 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.0) internal successors, (90), 9 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:34:04,924 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:34:04,924 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:34:04,924 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable99 [2024-06-27 21:34:04,924 INFO L420 AbstractCegarLoop]: === Iteration 101 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:34:04,925 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:34:04,925 INFO L85 PathProgramCache]: Analyzing trace with hash -105381600, now seen corresponding path program 5 times [2024-06-27 21:34:04,925 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:34:04,926 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2107291247] [2024-06-27 21:34:04,926 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:34:04,926 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:34:04,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:34:07,196 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:34:07,196 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:34:07,197 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2107291247] [2024-06-27 21:34:07,197 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2107291247] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:34:07,197 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:34:07,197 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:34:07,197 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1614956743] [2024-06-27 21:34:07,197 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:34:07,197 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:34:07,197 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:34:07,197 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:34:07,197 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:34:07,226 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-27 21:34:07,227 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 330 places, 408 transitions, 5765 flow. Second operand has 9 states, 9 states have (on average 10.0) internal successors, (90), 9 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:34:07,227 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:34:07,227 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-27 21:34:07,227 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:34:09,132 INFO L124 PetriNetUnfolderBase]: 3559/5603 cut-off events. [2024-06-27 21:34:09,133 INFO L125 PetriNetUnfolderBase]: For 857236/857236 co-relation queries the response was YES. [2024-06-27 21:34:09,186 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44908 conditions, 5603 events. 3559/5603 cut-off events. For 857236/857236 co-relation queries the response was YES. Maximal size of possible extension queue 343. Compared 33346 event pairs, 810 based on Foata normal form. 8/5611 useless extension candidates. Maximal degree in co-relation 44756. Up to 5169 conditions per place. [2024-06-27 21:34:09,210 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 364 selfloop transitions, 72 changer transitions 0/441 dead transitions. [2024-06-27 21:34:09,210 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 338 places, 441 transitions, 6767 flow [2024-06-27 21:34:09,211 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 21:34:09,211 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 21:34:09,211 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 160 transitions. [2024-06-27 21:34:09,211 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4134366925064599 [2024-06-27 21:34:09,211 INFO L175 Difference]: Start difference. First operand has 330 places, 408 transitions, 5765 flow. Second operand 9 states and 160 transitions. [2024-06-27 21:34:09,211 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 338 places, 441 transitions, 6767 flow [2024-06-27 21:34:11,245 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 331 places, 441 transitions, 6627 flow, removed 12 selfloop flow, removed 7 redundant places. [2024-06-27 21:34:11,254 INFO L231 Difference]: Finished difference. Result has 332 places, 408 transitions, 5779 flow [2024-06-27 21:34:11,256 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=5625, PETRI_DIFFERENCE_MINUEND_PLACES=323, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=408, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=72, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=336, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5779, PETRI_PLACES=332, PETRI_TRANSITIONS=408} [2024-06-27 21:34:11,256 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 288 predicate places. [2024-06-27 21:34:11,256 INFO L495 AbstractCegarLoop]: Abstraction has has 332 places, 408 transitions, 5779 flow [2024-06-27 21:34:11,256 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.0) internal successors, (90), 9 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:34:11,256 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:34:11,257 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:34:11,257 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable100 [2024-06-27 21:34:11,257 INFO L420 AbstractCegarLoop]: === Iteration 102 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:34:11,257 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:34:11,257 INFO L85 PathProgramCache]: Analyzing trace with hash 1782405675, now seen corresponding path program 4 times [2024-06-27 21:34:11,257 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:34:11,257 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1163233659] [2024-06-27 21:34:11,258 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:34:11,258 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:34:11,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:34:14,321 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:34:14,322 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:34:14,322 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1163233659] [2024-06-27 21:34:14,322 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1163233659] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:34:14,322 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:34:14,322 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:34:14,322 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1924588170] [2024-06-27 21:34:14,322 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:34:14,322 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:34:14,322 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:34:14,322 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:34:14,323 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:34:14,348 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-27 21:34:14,349 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 332 places, 408 transitions, 5779 flow. Second operand has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:34:14,349 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:34:14,349 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-27 21:34:14,349 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:34:16,476 INFO L124 PetriNetUnfolderBase]: 3554/5586 cut-off events. [2024-06-27 21:34:16,476 INFO L125 PetriNetUnfolderBase]: For 833772/833772 co-relation queries the response was YES. [2024-06-27 21:34:16,527 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44793 conditions, 5586 events. 3554/5586 cut-off events. For 833772/833772 co-relation queries the response was YES. Maximal size of possible extension queue 344. Compared 33284 event pairs, 885 based on Foata normal form. 2/5586 useless extension candidates. Maximal degree in co-relation 44640. Up to 5332 conditions per place. [2024-06-27 21:34:16,550 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 389 selfloop transitions, 29 changer transitions 0/423 dead transitions. [2024-06-27 21:34:16,550 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 339 places, 423 transitions, 6657 flow [2024-06-27 21:34:16,551 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 21:34:16,551 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 21:34:16,551 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 124 transitions. [2024-06-27 21:34:16,551 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36046511627906974 [2024-06-27 21:34:16,551 INFO L175 Difference]: Start difference. First operand has 332 places, 408 transitions, 5779 flow. Second operand 8 states and 124 transitions. [2024-06-27 21:34:16,551 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 339 places, 423 transitions, 6657 flow [2024-06-27 21:34:18,656 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 329 places, 423 transitions, 6437 flow, removed 8 selfloop flow, removed 10 redundant places. [2024-06-27 21:34:18,661 INFO L231 Difference]: Finished difference. Result has 330 places, 408 transitions, 5622 flow [2024-06-27 21:34:18,662 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=5559, PETRI_DIFFERENCE_MINUEND_PLACES=322, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=408, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=379, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5622, PETRI_PLACES=330, PETRI_TRANSITIONS=408} [2024-06-27 21:34:18,662 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 286 predicate places. [2024-06-27 21:34:18,662 INFO L495 AbstractCegarLoop]: Abstraction has has 330 places, 408 transitions, 5622 flow [2024-06-27 21:34:18,662 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:34:18,662 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:34:18,662 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:34:18,662 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable101 [2024-06-27 21:34:18,663 INFO L420 AbstractCegarLoop]: === Iteration 103 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:34:18,663 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:34:18,663 INFO L85 PathProgramCache]: Analyzing trace with hash -1488660439, now seen corresponding path program 5 times [2024-06-27 21:34:18,663 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:34:18,663 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1837265587] [2024-06-27 21:34:18,663 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:34:18,663 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:34:18,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:34:21,639 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:34:21,639 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:34:21,639 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1837265587] [2024-06-27 21:34:21,639 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1837265587] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:34:21,639 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:34:21,639 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:34:21,640 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1568726236] [2024-06-27 21:34:21,640 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:34:21,640 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:34:21,640 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:34:21,640 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:34:21,640 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:34:21,660 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-27 21:34:21,661 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 330 places, 408 transitions, 5622 flow. Second operand has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:34:21,661 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:34:21,661 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-27 21:34:21,661 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:34:23,789 INFO L124 PetriNetUnfolderBase]: 3559/5601 cut-off events. [2024-06-27 21:34:23,790 INFO L125 PetriNetUnfolderBase]: For 844892/844894 co-relation queries the response was YES. [2024-06-27 21:34:23,839 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44810 conditions, 5601 events. 3559/5601 cut-off events. For 844892/844894 co-relation queries the response was YES. Maximal size of possible extension queue 350. Compared 33392 event pairs, 857 based on Foata normal form. 3/5602 useless extension candidates. Maximal degree in co-relation 44656. Up to 4705 conditions per place. [2024-06-27 21:34:23,860 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 298 selfloop transitions, 141 changer transitions 0/444 dead transitions. [2024-06-27 21:34:23,860 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 337 places, 444 transitions, 7384 flow [2024-06-27 21:34:23,861 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 21:34:23,861 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 21:34:23,862 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 145 transitions. [2024-06-27 21:34:23,862 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42151162790697677 [2024-06-27 21:34:23,862 INFO L175 Difference]: Start difference. First operand has 330 places, 408 transitions, 5622 flow. Second operand 8 states and 145 transitions. [2024-06-27 21:34:23,862 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 337 places, 444 transitions, 7384 flow [2024-06-27 21:34:26,062 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 328 places, 444 transitions, 7251 flow, removed 7 selfloop flow, removed 9 redundant places. [2024-06-27 21:34:26,068 INFO L231 Difference]: Finished difference. Result has 329 places, 414 transitions, 5971 flow [2024-06-27 21:34:26,068 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=5489, PETRI_DIFFERENCE_MINUEND_PLACES=321, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=408, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=136, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=272, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5971, PETRI_PLACES=329, PETRI_TRANSITIONS=414} [2024-06-27 21:34:26,069 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 285 predicate places. [2024-06-27 21:34:26,069 INFO L495 AbstractCegarLoop]: Abstraction has has 329 places, 414 transitions, 5971 flow [2024-06-27 21:34:26,069 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:34:26,069 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:34:26,069 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:34:26,069 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable102 [2024-06-27 21:34:26,069 INFO L420 AbstractCegarLoop]: === Iteration 104 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:34:26,070 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:34:26,070 INFO L85 PathProgramCache]: Analyzing trace with hash 502480751, now seen corresponding path program 6 times [2024-06-27 21:34:26,070 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:34:26,070 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2118159003] [2024-06-27 21:34:26,070 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:34:26,070 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:34:26,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:34:28,756 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:34:28,756 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:34:28,756 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2118159003] [2024-06-27 21:34:28,756 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2118159003] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:34:28,757 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:34:28,757 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:34:28,757 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [101982052] [2024-06-27 21:34:28,757 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:34:28,757 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:34:28,757 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:34:28,757 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:34:28,758 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:34:28,769 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-27 21:34:28,769 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 329 places, 414 transitions, 5971 flow. Second operand has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:34:28,769 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:34:28,769 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-27 21:34:28,769 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:34:30,830 INFO L124 PetriNetUnfolderBase]: 3564/5610 cut-off events. [2024-06-27 21:34:30,830 INFO L125 PetriNetUnfolderBase]: For 864253/864255 co-relation queries the response was YES. [2024-06-27 21:34:30,886 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45326 conditions, 5610 events. 3564/5610 cut-off events. For 864253/864255 co-relation queries the response was YES. Maximal size of possible extension queue 352. Compared 33506 event pairs, 857 based on Foata normal form. 3/5611 useless extension candidates. Maximal degree in co-relation 45173. Up to 4709 conditions per place. [2024-06-27 21:34:30,907 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 297 selfloop transitions, 142 changer transitions 0/444 dead transitions. [2024-06-27 21:34:30,908 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 336 places, 444 transitions, 7641 flow [2024-06-27 21:34:30,909 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 21:34:30,909 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 21:34:30,909 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 142 transitions. [2024-06-27 21:34:30,909 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4127906976744186 [2024-06-27 21:34:30,909 INFO L175 Difference]: Start difference. First operand has 329 places, 414 transitions, 5971 flow. Second operand 8 states and 142 transitions. [2024-06-27 21:34:30,909 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 336 places, 444 transitions, 7641 flow [2024-06-27 21:34:33,430 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 332 places, 444 transitions, 7402 flow, removed 77 selfloop flow, removed 4 redundant places. [2024-06-27 21:34:33,453 INFO L231 Difference]: Finished difference. Result has 333 places, 417 transitions, 6124 flow [2024-06-27 21:34:33,453 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=5766, PETRI_DIFFERENCE_MINUEND_PLACES=325, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=414, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=139, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=275, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6124, PETRI_PLACES=333, PETRI_TRANSITIONS=417} [2024-06-27 21:34:33,453 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 289 predicate places. [2024-06-27 21:34:33,454 INFO L495 AbstractCegarLoop]: Abstraction has has 333 places, 417 transitions, 6124 flow [2024-06-27 21:34:33,454 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:34:33,454 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:34:33,454 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:34:33,454 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable103 [2024-06-27 21:34:33,454 INFO L420 AbstractCegarLoop]: === Iteration 105 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:34:33,455 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:34:33,455 INFO L85 PathProgramCache]: Analyzing trace with hash 1829214249, now seen corresponding path program 7 times [2024-06-27 21:34:33,455 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:34:33,455 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1116062100] [2024-06-27 21:34:33,455 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:34:33,456 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:34:33,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:34:36,109 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:34:36,110 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:34:36,110 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1116062100] [2024-06-27 21:34:36,110 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1116062100] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:34:36,110 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:34:36,110 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:34:36,110 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1926349762] [2024-06-27 21:34:36,110 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:34:36,111 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:34:36,111 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:34:36,111 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:34:36,111 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:34:36,128 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-27 21:34:36,129 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 333 places, 417 transitions, 6124 flow. Second operand has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:34:36,129 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:34:36,129 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-27 21:34:36,129 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:34:38,249 INFO L124 PetriNetUnfolderBase]: 3569/5619 cut-off events. [2024-06-27 21:34:38,249 INFO L125 PetriNetUnfolderBase]: For 880120/880122 co-relation queries the response was YES. [2024-06-27 21:34:38,305 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45785 conditions, 5619 events. 3569/5619 cut-off events. For 880120/880122 co-relation queries the response was YES. Maximal size of possible extension queue 354. Compared 33547 event pairs, 861 based on Foata normal form. 3/5620 useless extension candidates. Maximal degree in co-relation 45630. Up to 4713 conditions per place. [2024-06-27 21:34:38,328 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 288 selfloop transitions, 148 changer transitions 0/441 dead transitions. [2024-06-27 21:34:38,328 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 340 places, 441 transitions, 7540 flow [2024-06-27 21:34:38,329 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 21:34:38,329 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 21:34:38,329 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 136 transitions. [2024-06-27 21:34:38,330 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3953488372093023 [2024-06-27 21:34:38,330 INFO L175 Difference]: Start difference. First operand has 333 places, 417 transitions, 6124 flow. Second operand 8 states and 136 transitions. [2024-06-27 21:34:38,330 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 340 places, 441 transitions, 7540 flow [2024-06-27 21:34:40,391 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 335 places, 441 transitions, 7224 flow, removed 25 selfloop flow, removed 5 redundant places. [2024-06-27 21:34:40,396 INFO L231 Difference]: Finished difference. Result has 336 places, 420 transitions, 6184 flow [2024-06-27 21:34:40,397 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=5811, PETRI_DIFFERENCE_MINUEND_PLACES=328, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=417, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=145, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=272, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6184, PETRI_PLACES=336, PETRI_TRANSITIONS=420} [2024-06-27 21:34:40,411 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 292 predicate places. [2024-06-27 21:34:40,412 INFO L495 AbstractCegarLoop]: Abstraction has has 336 places, 420 transitions, 6184 flow [2024-06-27 21:34:40,412 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:34:40,412 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:34:40,412 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:34:40,412 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable104 [2024-06-27 21:34:40,412 INFO L420 AbstractCegarLoop]: === Iteration 106 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:34:40,413 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:34:40,413 INFO L85 PathProgramCache]: Analyzing trace with hash 1629421861, now seen corresponding path program 8 times [2024-06-27 21:34:40,413 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:34:40,413 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1201199209] [2024-06-27 21:34:40,413 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:34:40,413 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:34:40,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:34:43,105 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:34:43,105 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:34:43,105 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1201199209] [2024-06-27 21:34:43,105 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1201199209] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:34:43,105 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:34:43,106 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:34:43,106 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1987396321] [2024-06-27 21:34:43,106 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:34:43,106 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:34:43,106 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:34:43,106 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:34:43,107 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:34:43,123 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-27 21:34:43,124 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 336 places, 420 transitions, 6184 flow. Second operand has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:34:43,124 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:34:43,124 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-27 21:34:43,124 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:34:45,079 INFO L124 PetriNetUnfolderBase]: 3582/5631 cut-off events. [2024-06-27 21:34:45,079 INFO L125 PetriNetUnfolderBase]: For 898281/898281 co-relation queries the response was YES. [2024-06-27 21:34:45,135 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46167 conditions, 5631 events. 3582/5631 cut-off events. For 898281/898281 co-relation queries the response was YES. Maximal size of possible extension queue 353. Compared 33584 event pairs, 876 based on Foata normal form. 1/5630 useless extension candidates. Maximal degree in co-relation 46011. Up to 5274 conditions per place. [2024-06-27 21:34:45,158 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 372 selfloop transitions, 66 changer transitions 0/443 dead transitions. [2024-06-27 21:34:45,159 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 345 places, 443 transitions, 7593 flow [2024-06-27 21:34:45,160 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 21:34:45,160 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 21:34:45,160 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 159 transitions. [2024-06-27 21:34:45,160 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3697674418604651 [2024-06-27 21:34:45,160 INFO L175 Difference]: Start difference. First operand has 336 places, 420 transitions, 6184 flow. Second operand 10 states and 159 transitions. [2024-06-27 21:34:45,160 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 345 places, 443 transitions, 7593 flow [2024-06-27 21:34:47,311 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 340 places, 443 transitions, 7252 flow, removed 47 selfloop flow, removed 5 redundant places. [2024-06-27 21:34:47,316 INFO L231 Difference]: Finished difference. Result has 342 places, 423 transitions, 6070 flow [2024-06-27 21:34:47,317 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=5849, PETRI_DIFFERENCE_MINUEND_PLACES=331, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=420, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=63, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=354, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=6070, PETRI_PLACES=342, PETRI_TRANSITIONS=423} [2024-06-27 21:34:47,317 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 298 predicate places. [2024-06-27 21:34:47,317 INFO L495 AbstractCegarLoop]: Abstraction has has 342 places, 423 transitions, 6070 flow [2024-06-27 21:34:47,317 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:34:47,317 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:34:47,318 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:34:47,318 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable105 [2024-06-27 21:34:47,318 INFO L420 AbstractCegarLoop]: === Iteration 107 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:34:47,318 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:34:47,318 INFO L85 PathProgramCache]: Analyzing trace with hash 1317856717, now seen corresponding path program 9 times [2024-06-27 21:34:47,318 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:34:47,318 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1559575685] [2024-06-27 21:34:47,318 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:34:47,319 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:34:47,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:34:50,016 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:34:50,017 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:34:50,017 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1559575685] [2024-06-27 21:34:50,017 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1559575685] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:34:50,017 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:34:50,017 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:34:50,017 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [735891713] [2024-06-27 21:34:50,017 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:34:50,018 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:34:50,018 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:34:50,018 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:34:50,018 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:34:50,033 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-27 21:34:50,033 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 342 places, 423 transitions, 6070 flow. Second operand has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:34:50,033 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:34:50,033 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-27 21:34:50,033 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:34:51,910 INFO L124 PetriNetUnfolderBase]: 3579/5625 cut-off events. [2024-06-27 21:34:51,911 INFO L125 PetriNetUnfolderBase]: For 908780/908780 co-relation queries the response was YES. [2024-06-27 21:34:51,963 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45846 conditions, 5625 events. 3579/5625 cut-off events. For 908780/908780 co-relation queries the response was YES. Maximal size of possible extension queue 352. Compared 33516 event pairs, 878 based on Foata normal form. 1/5624 useless extension candidates. Maximal degree in co-relation 45688. Up to 5272 conditions per place. [2024-06-27 21:34:51,984 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 365 selfloop transitions, 70 changer transitions 0/440 dead transitions. [2024-06-27 21:34:51,985 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 350 places, 440 transitions, 7196 flow [2024-06-27 21:34:51,986 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 21:34:51,986 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 21:34:51,986 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 142 transitions. [2024-06-27 21:34:51,986 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3669250645994832 [2024-06-27 21:34:51,986 INFO L175 Difference]: Start difference. First operand has 342 places, 423 transitions, 6070 flow. Second operand 9 states and 142 transitions. [2024-06-27 21:34:51,986 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 350 places, 440 transitions, 7196 flow [2024-06-27 21:34:54,324 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 342 places, 440 transitions, 6968 flow, removed 38 selfloop flow, removed 8 redundant places. [2024-06-27 21:34:54,329 INFO L231 Difference]: Finished difference. Result has 343 places, 423 transitions, 5988 flow [2024-06-27 21:34:54,329 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=5842, PETRI_DIFFERENCE_MINUEND_PLACES=334, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=423, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=70, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=353, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5988, PETRI_PLACES=343, PETRI_TRANSITIONS=423} [2024-06-27 21:34:54,329 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 299 predicate places. [2024-06-27 21:34:54,329 INFO L495 AbstractCegarLoop]: Abstraction has has 343 places, 423 transitions, 5988 flow [2024-06-27 21:34:54,330 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:34:54,330 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:34:54,330 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:34:54,330 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable106 [2024-06-27 21:34:54,330 INFO L420 AbstractCegarLoop]: === Iteration 108 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:34:54,330 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:34:54,330 INFO L85 PathProgramCache]: Analyzing trace with hash 1889558868, now seen corresponding path program 6 times [2024-06-27 21:34:54,331 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:34:54,331 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [581866751] [2024-06-27 21:34:54,331 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:34:54,331 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:34:54,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:34:56,970 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:34:56,970 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:34:56,970 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [581866751] [2024-06-27 21:34:56,970 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [581866751] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:34:56,970 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:34:56,970 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:34:56,970 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [688140473] [2024-06-27 21:34:56,971 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:34:56,971 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:34:56,971 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:34:56,971 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:34:56,971 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:34:56,997 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-27 21:34:56,997 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 343 places, 423 transitions, 5988 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:34:56,997 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:34:56,997 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-27 21:34:56,997 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:34:59,824 INFO L124 PetriNetUnfolderBase]: 3631/5724 cut-off events. [2024-06-27 21:34:59,825 INFO L125 PetriNetUnfolderBase]: For 963701/963703 co-relation queries the response was YES. [2024-06-27 21:34:59,886 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46824 conditions, 5724 events. 3631/5724 cut-off events. For 963701/963703 co-relation queries the response was YES. Maximal size of possible extension queue 359. Compared 34126 event pairs, 882 based on Foata normal form. 6/5729 useless extension candidates. Maximal degree in co-relation 46665. Up to 4664 conditions per place. [2024-06-27 21:34:59,908 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 287 selfloop transitions, 174 changer transitions 0/466 dead transitions. [2024-06-27 21:34:59,908 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 353 places, 466 transitions, 7538 flow [2024-06-27 21:34:59,909 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-27 21:34:59,909 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-27 21:34:59,909 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 185 transitions. [2024-06-27 21:34:59,910 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39112050739957716 [2024-06-27 21:34:59,910 INFO L175 Difference]: Start difference. First operand has 343 places, 423 transitions, 5988 flow. Second operand 11 states and 185 transitions. [2024-06-27 21:34:59,910 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 353 places, 466 transitions, 7538 flow [2024-06-27 21:35:02,391 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 344 places, 466 transitions, 7341 flow, removed 1 selfloop flow, removed 9 redundant places. [2024-06-27 21:35:02,397 INFO L231 Difference]: Finished difference. Result has 345 places, 429 transitions, 6253 flow [2024-06-27 21:35:02,397 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=5791, PETRI_DIFFERENCE_MINUEND_PLACES=334, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=423, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=168, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=255, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=6253, PETRI_PLACES=345, PETRI_TRANSITIONS=429} [2024-06-27 21:35:02,397 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 301 predicate places. [2024-06-27 21:35:02,397 INFO L495 AbstractCegarLoop]: Abstraction has has 345 places, 429 transitions, 6253 flow [2024-06-27 21:35:02,398 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:35:02,398 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:35:02,398 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:35:02,398 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable107 [2024-06-27 21:35:02,398 INFO L420 AbstractCegarLoop]: === Iteration 109 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:35:02,399 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:35:02,399 INFO L85 PathProgramCache]: Analyzing trace with hash 1889553288, now seen corresponding path program 7 times [2024-06-27 21:35:02,399 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:35:02,399 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [985807622] [2024-06-27 21:35:02,399 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:35:02,399 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:35:02,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:35:05,134 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:35:05,134 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:35:05,134 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [985807622] [2024-06-27 21:35:05,134 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [985807622] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:35:05,134 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:35:05,134 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:35:05,134 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1151306613] [2024-06-27 21:35:05,134 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:35:05,134 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:35:05,135 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:35:05,135 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:35:05,135 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:35:05,167 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-27 21:35:05,167 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 345 places, 429 transitions, 6253 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:35:05,167 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:35:05,167 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-27 21:35:05,167 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:35:07,581 INFO L124 PetriNetUnfolderBase]: 3619/5706 cut-off events. [2024-06-27 21:35:07,582 INFO L125 PetriNetUnfolderBase]: For 961664/961666 co-relation queries the response was YES. [2024-06-27 21:35:07,643 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46987 conditions, 5706 events. 3619/5706 cut-off events. For 961664/961666 co-relation queries the response was YES. Maximal size of possible extension queue 359. Compared 34056 event pairs, 876 based on Foata normal form. 6/5711 useless extension candidates. Maximal degree in co-relation 46827. Up to 4656 conditions per place. [2024-06-27 21:35:07,667 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 284 selfloop transitions, 173 changer transitions 0/462 dead transitions. [2024-06-27 21:35:07,667 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 353 places, 462 transitions, 7469 flow [2024-06-27 21:35:07,669 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 21:35:07,669 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 21:35:07,669 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 161 transitions. [2024-06-27 21:35:07,669 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4160206718346253 [2024-06-27 21:35:07,669 INFO L175 Difference]: Start difference. First operand has 345 places, 429 transitions, 6253 flow. Second operand 9 states and 161 transitions. [2024-06-27 21:35:07,669 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 353 places, 462 transitions, 7469 flow [2024-06-27 21:35:10,398 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 345 places, 462 transitions, 7059 flow, removed 30 selfloop flow, removed 8 redundant places. [2024-06-27 21:35:10,403 INFO L231 Difference]: Finished difference. Result has 346 places, 429 transitions, 6195 flow [2024-06-27 21:35:10,403 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=5843, PETRI_DIFFERENCE_MINUEND_PLACES=337, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=429, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=173, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=256, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6195, PETRI_PLACES=346, PETRI_TRANSITIONS=429} [2024-06-27 21:35:10,403 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 302 predicate places. [2024-06-27 21:35:10,403 INFO L495 AbstractCegarLoop]: Abstraction has has 346 places, 429 transitions, 6195 flow [2024-06-27 21:35:10,416 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:35:10,432 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:35:10,432 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:35:10,432 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable108 [2024-06-27 21:35:10,432 INFO L420 AbstractCegarLoop]: === Iteration 110 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:35:10,433 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:35:10,433 INFO L85 PathProgramCache]: Analyzing trace with hash -222110622, now seen corresponding path program 8 times [2024-06-27 21:35:10,433 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:35:10,433 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1426112564] [2024-06-27 21:35:10,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:35:10,433 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:35:10,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:35:13,009 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:35:13,009 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:35:13,009 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1426112564] [2024-06-27 21:35:13,009 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1426112564] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:35:13,009 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:35:13,009 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:35:13,009 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [499455922] [2024-06-27 21:35:13,009 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:35:13,010 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:35:13,010 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:35:13,010 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:35:13,010 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:35:13,045 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-27 21:35:13,046 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 346 places, 429 transitions, 6195 flow. Second operand has 9 states, 9 states have (on average 10.0) internal successors, (90), 9 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:35:13,046 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:35:13,046 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-27 21:35:13,046 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:35:15,117 INFO L124 PetriNetUnfolderBase]: 3639/5737 cut-off events. [2024-06-27 21:35:15,117 INFO L125 PetriNetUnfolderBase]: For 977390/977398 co-relation queries the response was YES. [2024-06-27 21:35:15,173 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47193 conditions, 5737 events. 3639/5737 cut-off events. For 977390/977398 co-relation queries the response was YES. Maximal size of possible extension queue 362. Compared 34317 event pairs, 774 based on Foata normal form. 12/5748 useless extension candidates. Maximal degree in co-relation 47032. Up to 4672 conditions per place. [2024-06-27 21:35:15,195 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 291 selfloop transitions, 169 changer transitions 0/465 dead transitions. [2024-06-27 21:35:15,195 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 353 places, 465 transitions, 7721 flow [2024-06-27 21:35:15,196 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 21:35:15,196 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 21:35:15,196 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 147 transitions. [2024-06-27 21:35:15,196 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4273255813953488 [2024-06-27 21:35:15,197 INFO L175 Difference]: Start difference. First operand has 346 places, 429 transitions, 6195 flow. Second operand 8 states and 147 transitions. [2024-06-27 21:35:15,197 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 353 places, 465 transitions, 7721 flow [2024-06-27 21:35:17,575 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 346 places, 465 transitions, 7487 flow, removed 0 selfloop flow, removed 7 redundant places. [2024-06-27 21:35:17,580 INFO L231 Difference]: Finished difference. Result has 347 places, 433 transitions, 6393 flow [2024-06-27 21:35:17,581 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=5965, PETRI_DIFFERENCE_MINUEND_PLACES=339, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=429, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=165, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=264, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6393, PETRI_PLACES=347, PETRI_TRANSITIONS=433} [2024-06-27 21:35:17,585 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 303 predicate places. [2024-06-27 21:35:17,585 INFO L495 AbstractCegarLoop]: Abstraction has has 347 places, 433 transitions, 6393 flow [2024-06-27 21:35:17,586 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.0) internal successors, (90), 9 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:35:17,586 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:35:17,586 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:35:17,586 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable109 [2024-06-27 21:35:17,586 INFO L420 AbstractCegarLoop]: === Iteration 111 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:35:17,586 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:35:17,586 INFO L85 PathProgramCache]: Analyzing trace with hash 396360202, now seen corresponding path program 9 times [2024-06-27 21:35:17,587 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:35:17,587 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1891994216] [2024-06-27 21:35:17,587 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:35:17,587 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:35:17,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:35:19,996 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:35:19,996 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:35:19,996 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1891994216] [2024-06-27 21:35:19,997 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1891994216] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:35:19,997 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:35:19,997 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:35:19,997 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [6411553] [2024-06-27 21:35:19,997 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:35:19,997 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:35:19,997 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:35:19,998 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:35:19,998 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:35:20,023 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-27 21:35:20,024 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 347 places, 433 transitions, 6393 flow. Second operand has 9 states, 9 states have (on average 10.0) internal successors, (90), 9 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:35:20,024 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:35:20,024 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-27 21:35:20,024 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:35:22,195 INFO L124 PetriNetUnfolderBase]: 3691/5821 cut-off events. [2024-06-27 21:35:22,195 INFO L125 PetriNetUnfolderBase]: For 1024226/1024234 co-relation queries the response was YES. [2024-06-27 21:35:22,249 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48445 conditions, 5821 events. 3691/5821 cut-off events. For 1024226/1024234 co-relation queries the response was YES. Maximal size of possible extension queue 373. Compared 34912 event pairs, 792 based on Foata normal form. 12/5832 useless extension candidates. Maximal degree in co-relation 48282. Up to 4712 conditions per place. [2024-06-27 21:35:22,269 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 289 selfloop transitions, 174 changer transitions 0/468 dead transitions. [2024-06-27 21:35:22,270 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 354 places, 468 transitions, 7959 flow [2024-06-27 21:35:22,270 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 21:35:22,270 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 21:35:22,271 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 145 transitions. [2024-06-27 21:35:22,271 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42151162790697677 [2024-06-27 21:35:22,271 INFO L175 Difference]: Start difference. First operand has 347 places, 433 transitions, 6393 flow. Second operand 8 states and 145 transitions. [2024-06-27 21:35:22,271 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 354 places, 468 transitions, 7959 flow [2024-06-27 21:35:24,538 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 350 places, 468 transitions, 7655 flow, removed 34 selfloop flow, removed 4 redundant places. [2024-06-27 21:35:24,545 INFO L231 Difference]: Finished difference. Result has 351 places, 439 transitions, 6573 flow [2024-06-27 21:35:24,545 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=6111, PETRI_DIFFERENCE_MINUEND_PLACES=343, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=433, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=168, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=265, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6573, PETRI_PLACES=351, PETRI_TRANSITIONS=439} [2024-06-27 21:35:24,546 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 307 predicate places. [2024-06-27 21:35:24,546 INFO L495 AbstractCegarLoop]: Abstraction has has 351 places, 439 transitions, 6573 flow [2024-06-27 21:35:24,546 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.0) internal successors, (90), 9 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:35:24,546 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:35:24,547 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:35:24,547 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable110 [2024-06-27 21:35:24,547 INFO L420 AbstractCegarLoop]: === Iteration 112 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:35:24,548 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:35:24,548 INFO L85 PathProgramCache]: Analyzing trace with hash -1359116884, now seen corresponding path program 10 times [2024-06-27 21:35:24,549 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:35:24,549 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1913222979] [2024-06-27 21:35:24,549 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:35:24,549 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:35:24,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:35:27,276 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:35:27,276 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:35:27,276 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1913222979] [2024-06-27 21:35:27,276 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1913222979] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:35:27,276 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:35:27,276 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:35:27,277 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [5108709] [2024-06-27 21:35:27,277 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:35:27,277 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:35:27,277 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:35:27,277 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:35:27,277 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:35:27,296 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-27 21:35:27,297 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 351 places, 439 transitions, 6573 flow. Second operand has 9 states, 9 states have (on average 10.0) internal successors, (90), 9 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:35:27,297 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:35:27,297 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-27 21:35:27,297 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:35:29,412 INFO L124 PetriNetUnfolderBase]: 3679/5811 cut-off events. [2024-06-27 21:35:29,412 INFO L125 PetriNetUnfolderBase]: For 1020425/1020427 co-relation queries the response was YES. [2024-06-27 21:35:29,472 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47905 conditions, 5811 events. 3679/5811 cut-off events. For 1020425/1020427 co-relation queries the response was YES. Maximal size of possible extension queue 373. Compared 34938 event pairs, 773 based on Foata normal form. 6/5817 useless extension candidates. Maximal degree in co-relation 47740. Up to 5418 conditions per place. [2024-06-27 21:35:29,495 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 416 selfloop transitions, 43 changer transitions 0/464 dead transitions. [2024-06-27 21:35:29,496 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 358 places, 464 transitions, 7553 flow [2024-06-27 21:35:29,496 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 21:35:29,497 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 21:35:29,497 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 137 transitions. [2024-06-27 21:35:29,497 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39825581395348836 [2024-06-27 21:35:29,497 INFO L175 Difference]: Start difference. First operand has 351 places, 439 transitions, 6573 flow. Second operand 8 states and 137 transitions. [2024-06-27 21:35:29,497 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 358 places, 464 transitions, 7553 flow [2024-06-27 21:35:32,276 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 354 places, 464 transitions, 7274 flow, removed 22 selfloop flow, removed 4 redundant places. [2024-06-27 21:35:32,282 INFO L231 Difference]: Finished difference. Result has 355 places, 439 transitions, 6386 flow [2024-06-27 21:35:32,282 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=6294, PETRI_DIFFERENCE_MINUEND_PLACES=347, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=439, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=396, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6386, PETRI_PLACES=355, PETRI_TRANSITIONS=439} [2024-06-27 21:35:32,282 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 311 predicate places. [2024-06-27 21:35:32,282 INFO L495 AbstractCegarLoop]: Abstraction has has 355 places, 439 transitions, 6386 flow [2024-06-27 21:35:32,282 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.0) internal successors, (90), 9 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:35:32,282 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:35:32,283 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:35:32,283 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable111 [2024-06-27 21:35:32,283 INFO L420 AbstractCegarLoop]: === Iteration 113 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:35:32,283 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:35:32,283 INFO L85 PathProgramCache]: Analyzing trace with hash -1688734192, now seen corresponding path program 11 times [2024-06-27 21:35:32,283 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:35:32,284 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1134811994] [2024-06-27 21:35:32,284 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:35:32,284 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:35:32,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:35:35,269 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:35:35,269 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:35:35,269 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1134811994] [2024-06-27 21:35:35,270 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1134811994] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:35:35,270 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:35:35,270 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:35:35,270 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [594888314] [2024-06-27 21:35:35,270 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:35:35,270 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:35:35,270 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:35:35,270 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:35:35,270 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:35:35,282 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-27 21:35:35,282 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 355 places, 439 transitions, 6386 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:35:35,282 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:35:35,282 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-27 21:35:35,282 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:35:37,837 INFO L124 PetriNetUnfolderBase]: 3731/5882 cut-off events. [2024-06-27 21:35:37,837 INFO L125 PetriNetUnfolderBase]: For 1063148/1063150 co-relation queries the response was YES. [2024-06-27 21:35:37,898 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48369 conditions, 5882 events. 3731/5882 cut-off events. For 1063148/1063150 co-relation queries the response was YES. Maximal size of possible extension queue 377. Compared 35261 event pairs, 810 based on Foata normal form. 6/5888 useless extension candidates. Maximal degree in co-relation 48203. Up to 5458 conditions per place. [2024-06-27 21:35:37,921 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 419 selfloop transitions, 53 changer transitions 0/477 dead transitions. [2024-06-27 21:35:37,921 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 365 places, 477 transitions, 7745 flow [2024-06-27 21:35:37,922 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-27 21:35:37,922 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-27 21:35:37,922 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 178 transitions. [2024-06-27 21:35:37,922 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3763213530655391 [2024-06-27 21:35:37,923 INFO L175 Difference]: Start difference. First operand has 355 places, 439 transitions, 6386 flow. Second operand 11 states and 178 transitions. [2024-06-27 21:35:37,923 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 365 places, 477 transitions, 7745 flow [2024-06-27 21:35:40,688 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 358 places, 477 transitions, 7634 flow, removed 4 selfloop flow, removed 7 redundant places. [2024-06-27 21:35:40,693 INFO L231 Difference]: Finished difference. Result has 360 places, 445 transitions, 6524 flow [2024-06-27 21:35:40,693 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=6275, PETRI_DIFFERENCE_MINUEND_PLACES=348, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=439, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=47, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=386, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=6524, PETRI_PLACES=360, PETRI_TRANSITIONS=445} [2024-06-27 21:35:40,694 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 316 predicate places. [2024-06-27 21:35:40,694 INFO L495 AbstractCegarLoop]: Abstraction has has 360 places, 445 transitions, 6524 flow [2024-06-27 21:35:40,694 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:35:40,694 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:35:40,694 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:35:40,694 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable112 [2024-06-27 21:35:40,694 INFO L420 AbstractCegarLoop]: === Iteration 114 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:35:40,695 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:35:40,695 INFO L85 PathProgramCache]: Analyzing trace with hash 1843303408, now seen corresponding path program 12 times [2024-06-27 21:35:40,695 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:35:40,695 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2108133732] [2024-06-27 21:35:40,695 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:35:40,695 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:35:40,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:35:43,553 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:35:43,553 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:35:43,553 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2108133732] [2024-06-27 21:35:43,553 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2108133732] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:35:43,553 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:35:43,553 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:35:43,553 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [962682642] [2024-06-27 21:35:43,553 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:35:43,553 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:35:43,553 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:35:43,554 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:35:43,554 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:35:43,572 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-27 21:35:43,572 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 360 places, 445 transitions, 6524 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:35:43,572 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:35:43,573 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-27 21:35:43,573 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:35:46,017 INFO L124 PetriNetUnfolderBase]: 3771/5946 cut-off events. [2024-06-27 21:35:46,017 INFO L125 PetriNetUnfolderBase]: For 1082662/1082664 co-relation queries the response was YES. [2024-06-27 21:35:46,075 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49033 conditions, 5946 events. 3771/5946 cut-off events. For 1082662/1082664 co-relation queries the response was YES. Maximal size of possible extension queue 385. Compared 35835 event pairs, 810 based on Foata normal form. 6/5952 useless extension candidates. Maximal degree in co-relation 48865. Up to 5482 conditions per place. [2024-06-27 21:35:46,097 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 425 selfloop transitions, 59 changer transitions 0/489 dead transitions. [2024-06-27 21:35:46,097 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 372 places, 489 transitions, 7918 flow [2024-06-27 21:35:46,098 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-06-27 21:35:46,098 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-06-27 21:35:46,098 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 206 transitions. [2024-06-27 21:35:46,098 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3685152057245081 [2024-06-27 21:35:46,098 INFO L175 Difference]: Start difference. First operand has 360 places, 445 transitions, 6524 flow. Second operand 13 states and 206 transitions. [2024-06-27 21:35:46,098 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 372 places, 489 transitions, 7918 flow [2024-06-27 21:35:49,580 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 361 places, 489 transitions, 7627 flow, removed 35 selfloop flow, removed 11 redundant places. [2024-06-27 21:35:49,586 INFO L231 Difference]: Finished difference. Result has 362 places, 451 transitions, 6471 flow [2024-06-27 21:35:49,586 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=6261, PETRI_DIFFERENCE_MINUEND_PLACES=349, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=445, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=53, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=392, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=6471, PETRI_PLACES=362, PETRI_TRANSITIONS=451} [2024-06-27 21:35:49,586 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 318 predicate places. [2024-06-27 21:35:49,586 INFO L495 AbstractCegarLoop]: Abstraction has has 362 places, 451 transitions, 6471 flow [2024-06-27 21:35:49,586 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:35:49,587 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:35:49,587 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:35:49,587 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable113 [2024-06-27 21:35:49,587 INFO L420 AbstractCegarLoop]: === Iteration 115 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:35:49,587 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:35:49,587 INFO L85 PathProgramCache]: Analyzing trace with hash 1829226928, now seen corresponding path program 13 times [2024-06-27 21:35:49,587 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:35:49,588 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1748594505] [2024-06-27 21:35:49,588 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:35:49,588 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:35:49,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:35:52,421 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:35:52,421 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:35:52,421 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1748594505] [2024-06-27 21:35:52,422 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1748594505] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:35:52,422 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:35:52,422 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:35:52,422 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1574611828] [2024-06-27 21:35:52,422 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:35:52,422 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:35:52,422 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:35:52,422 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:35:52,422 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:35:52,448 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-27 21:35:52,448 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 362 places, 451 transitions, 6471 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:35:52,449 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:35:52,449 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-27 21:35:52,449 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:35:55,676 INFO L124 PetriNetUnfolderBase]: 3791/5978 cut-off events. [2024-06-27 21:35:55,676 INFO L125 PetriNetUnfolderBase]: For 1095531/1095533 co-relation queries the response was YES. [2024-06-27 21:35:55,736 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49089 conditions, 5978 events. 3791/5978 cut-off events. For 1095531/1095533 co-relation queries the response was YES. Maximal size of possible extension queue 390. Compared 35955 event pairs, 874 based on Foata normal form. 6/5983 useless extension candidates. Maximal degree in co-relation 48923. Up to 4784 conditions per place. [2024-06-27 21:35:55,758 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 287 selfloop transitions, 201 changer transitions 0/493 dead transitions. [2024-06-27 21:35:55,759 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 373 places, 493 transitions, 8285 flow [2024-06-27 21:35:55,759 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-27 21:35:55,760 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-27 21:35:55,760 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 202 transitions. [2024-06-27 21:35:55,760 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39147286821705424 [2024-06-27 21:35:55,760 INFO L175 Difference]: Start difference. First operand has 362 places, 451 transitions, 6471 flow. Second operand 12 states and 202 transitions. [2024-06-27 21:35:55,760 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 373 places, 493 transitions, 8285 flow [2024-06-27 21:35:58,239 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 363 places, 493 transitions, 8159 flow, removed 4 selfloop flow, removed 10 redundant places. [2024-06-27 21:35:58,245 INFO L231 Difference]: Finished difference. Result has 364 places, 454 transitions, 6819 flow [2024-06-27 21:35:58,245 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=6345, PETRI_DIFFERENCE_MINUEND_PLACES=352, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=451, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=198, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=253, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=6819, PETRI_PLACES=364, PETRI_TRANSITIONS=454} [2024-06-27 21:35:58,246 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 320 predicate places. [2024-06-27 21:35:58,246 INFO L495 AbstractCegarLoop]: Abstraction has has 364 places, 454 transitions, 6819 flow [2024-06-27 21:35:58,246 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:35:58,246 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:35:58,246 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:35:58,246 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable114 [2024-06-27 21:35:58,246 INFO L420 AbstractCegarLoop]: === Iteration 116 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:35:58,247 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:35:58,247 INFO L85 PathProgramCache]: Analyzing trace with hash 910272390, now seen corresponding path program 14 times [2024-06-27 21:35:58,247 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:35:58,247 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1128776169] [2024-06-27 21:35:58,247 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:35:58,247 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:35:58,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:36:00,983 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:36:00,983 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:36:00,984 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1128776169] [2024-06-27 21:36:00,984 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1128776169] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:36:00,984 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:36:00,984 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:36:00,984 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1221910895] [2024-06-27 21:36:00,984 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:36:00,984 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:36:00,984 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:36:00,985 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:36:00,985 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:36:00,998 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-27 21:36:00,999 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 364 places, 454 transitions, 6819 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:36:00,999 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:36:00,999 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-27 21:36:00,999 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:36:03,470 INFO L124 PetriNetUnfolderBase]: 3779/5948 cut-off events. [2024-06-27 21:36:03,470 INFO L125 PetriNetUnfolderBase]: For 1094328/1094330 co-relation queries the response was YES. [2024-06-27 21:36:03,535 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49328 conditions, 5948 events. 3779/5948 cut-off events. For 1094328/1094330 co-relation queries the response was YES. Maximal size of possible extension queue 387. Compared 35741 event pairs, 820 based on Foata normal form. 6/5954 useless extension candidates. Maximal degree in co-relation 49161. Up to 5546 conditions per place. [2024-06-27 21:36:03,562 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 428 selfloop transitions, 49 changer transitions 0/482 dead transitions. [2024-06-27 21:36:03,562 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 372 places, 482 transitions, 7841 flow [2024-06-27 21:36:03,563 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 21:36:03,563 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 21:36:03,563 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 153 transitions. [2024-06-27 21:36:03,564 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3953488372093023 [2024-06-27 21:36:03,564 INFO L175 Difference]: Start difference. First operand has 364 places, 454 transitions, 6819 flow. Second operand 9 states and 153 transitions. [2024-06-27 21:36:03,564 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 372 places, 482 transitions, 7841 flow [2024-06-27 21:36:07,010 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 361 places, 482 transitions, 7118 flow, removed 44 selfloop flow, removed 11 redundant places. [2024-06-27 21:36:07,015 INFO L231 Difference]: Finished difference. Result has 362 places, 454 transitions, 6200 flow [2024-06-27 21:36:07,015 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=6096, PETRI_DIFFERENCE_MINUEND_PLACES=353, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=454, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=49, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=405, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6200, PETRI_PLACES=362, PETRI_TRANSITIONS=454} [2024-06-27 21:36:07,016 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 318 predicate places. [2024-06-27 21:36:07,016 INFO L495 AbstractCegarLoop]: Abstraction has has 362 places, 454 transitions, 6200 flow [2024-06-27 21:36:07,016 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:36:07,016 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:36:07,016 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:36:07,016 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable115 [2024-06-27 21:36:07,016 INFO L420 AbstractCegarLoop]: === Iteration 117 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:36:07,017 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:36:07,017 INFO L85 PathProgramCache]: Analyzing trace with hash 1837495558, now seen corresponding path program 15 times [2024-06-27 21:36:07,017 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:36:07,018 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [517592251] [2024-06-27 21:36:07,018 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:36:07,018 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:36:07,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:36:09,863 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:36:09,864 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:36:09,864 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [517592251] [2024-06-27 21:36:09,864 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [517592251] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:36:09,864 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:36:09,864 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:36:09,864 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1354353206] [2024-06-27 21:36:09,864 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:36:09,864 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:36:09,864 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:36:09,864 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:36:09,864 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:36:09,876 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-27 21:36:09,876 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 362 places, 454 transitions, 6200 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:36:09,877 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:36:09,877 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-27 21:36:09,877 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:36:12,300 INFO L124 PetriNetUnfolderBase]: 3767/5944 cut-off events. [2024-06-27 21:36:12,300 INFO L125 PetriNetUnfolderBase]: For 1070618/1070620 co-relation queries the response was YES. [2024-06-27 21:36:12,367 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47592 conditions, 5944 events. 3767/5944 cut-off events. For 1070618/1070620 co-relation queries the response was YES. Maximal size of possible extension queue 390. Compared 35773 event pairs, 880 based on Foata normal form. 6/5949 useless extension candidates. Maximal degree in co-relation 47427. Up to 4768 conditions per place. [2024-06-27 21:36:12,390 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 283 selfloop transitions, 197 changer transitions 0/485 dead transitions. [2024-06-27 21:36:12,391 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 370 places, 485 transitions, 7698 flow [2024-06-27 21:36:12,391 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 21:36:12,391 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 21:36:12,391 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 160 transitions. [2024-06-27 21:36:12,392 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4134366925064599 [2024-06-27 21:36:12,392 INFO L175 Difference]: Start difference. First operand has 362 places, 454 transitions, 6200 flow. Second operand 9 states and 160 transitions. [2024-06-27 21:36:12,392 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 370 places, 485 transitions, 7698 flow [2024-06-27 21:36:15,045 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 361 places, 485 transitions, 7572 flow, removed 2 selfloop flow, removed 9 redundant places. [2024-06-27 21:36:15,051 INFO L231 Difference]: Finished difference. Result has 362 places, 454 transitions, 6474 flow [2024-06-27 21:36:15,051 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=6074, PETRI_DIFFERENCE_MINUEND_PLACES=353, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=454, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=197, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=257, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6474, PETRI_PLACES=362, PETRI_TRANSITIONS=454} [2024-06-27 21:36:15,051 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 318 predicate places. [2024-06-27 21:36:15,052 INFO L495 AbstractCegarLoop]: Abstraction has has 362 places, 454 transitions, 6474 flow [2024-06-27 21:36:15,052 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:36:15,052 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:36:15,052 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:36:15,052 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable116 [2024-06-27 21:36:15,052 INFO L420 AbstractCegarLoop]: === Iteration 118 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:36:15,053 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:36:15,053 INFO L85 PathProgramCache]: Analyzing trace with hash 901985160, now seen corresponding path program 16 times [2024-06-27 21:36:15,053 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:36:15,053 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1249912550] [2024-06-27 21:36:15,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:36:15,053 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:36:15,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:36:17,924 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:36:17,924 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:36:17,924 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1249912550] [2024-06-27 21:36:17,924 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1249912550] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:36:17,924 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:36:17,925 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:36:17,925 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1139662417] [2024-06-27 21:36:17,925 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:36:17,925 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:36:17,925 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:36:17,925 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:36:17,925 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:36:17,944 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-27 21:36:17,944 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 362 places, 454 transitions, 6474 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:36:17,944 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:36:17,944 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-27 21:36:17,944 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:36:20,564 INFO L124 PetriNetUnfolderBase]: 3755/5924 cut-off events. [2024-06-27 21:36:20,564 INFO L125 PetriNetUnfolderBase]: For 1063974/1063976 co-relation queries the response was YES. [2024-06-27 21:36:20,624 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47511 conditions, 5924 events. 3755/5924 cut-off events. For 1063974/1063976 co-relation queries the response was YES. Maximal size of possible extension queue 390. Compared 35660 event pairs, 870 based on Foata normal form. 6/5929 useless extension candidates. Maximal degree in co-relation 47345. Up to 4760 conditions per place. [2024-06-27 21:36:20,645 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 285 selfloop transitions, 199 changer transitions 0/489 dead transitions. [2024-06-27 21:36:20,645 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 372 places, 489 transitions, 7760 flow [2024-06-27 21:36:20,646 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-27 21:36:20,646 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-27 21:36:20,646 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 188 transitions. [2024-06-27 21:36:20,646 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3974630021141649 [2024-06-27 21:36:20,646 INFO L175 Difference]: Start difference. First operand has 362 places, 454 transitions, 6474 flow. Second operand 11 states and 188 transitions. [2024-06-27 21:36:20,647 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 372 places, 489 transitions, 7760 flow [2024-06-27 21:36:24,098 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 367 places, 489 transitions, 7490 flow, removed 11 selfloop flow, removed 5 redundant places. [2024-06-27 21:36:24,103 INFO L231 Difference]: Finished difference. Result has 368 places, 454 transitions, 6608 flow [2024-06-27 21:36:24,104 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=6204, PETRI_DIFFERENCE_MINUEND_PLACES=357, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=454, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=199, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=255, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=6608, PETRI_PLACES=368, PETRI_TRANSITIONS=454} [2024-06-27 21:36:24,104 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 324 predicate places. [2024-06-27 21:36:24,104 INFO L495 AbstractCegarLoop]: Abstraction has has 368 places, 454 transitions, 6608 flow [2024-06-27 21:36:24,104 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:36:24,104 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:36:24,105 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:36:24,105 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable117 [2024-06-27 21:36:24,105 INFO L420 AbstractCegarLoop]: === Iteration 119 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:36:24,105 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:36:24,105 INFO L85 PathProgramCache]: Analyzing trace with hash -196097692, now seen corresponding path program 17 times [2024-06-27 21:36:24,105 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:36:24,105 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [334244842] [2024-06-27 21:36:24,106 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:36:24,106 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:36:24,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:36:26,844 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:36:26,844 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:36:26,845 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [334244842] [2024-06-27 21:36:26,845 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [334244842] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:36:26,845 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:36:26,845 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:36:26,845 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [277116800] [2024-06-27 21:36:26,845 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:36:26,845 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:36:26,845 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:36:26,845 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:36:26,845 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:36:26,863 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-27 21:36:26,863 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 368 places, 454 transitions, 6608 flow. Second operand has 9 states, 9 states have (on average 10.0) internal successors, (90), 9 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:36:26,864 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:36:26,864 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-27 21:36:26,864 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:36:29,216 INFO L124 PetriNetUnfolderBase]: 3743/5896 cut-off events. [2024-06-27 21:36:29,217 INFO L125 PetriNetUnfolderBase]: For 1060314/1060314 co-relation queries the response was YES. [2024-06-27 21:36:29,275 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47127 conditions, 5896 events. 3743/5896 cut-off events. For 1060314/1060314 co-relation queries the response was YES. Maximal size of possible extension queue 388. Compared 35521 event pairs, 870 based on Foata normal form. 4/5900 useless extension candidates. Maximal degree in co-relation 46959. Up to 5538 conditions per place. [2024-06-27 21:36:29,297 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 433 selfloop transitions, 40 changer transitions 0/478 dead transitions. [2024-06-27 21:36:29,297 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 377 places, 478 transitions, 7844 flow [2024-06-27 21:36:29,298 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 21:36:29,298 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 21:36:29,298 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 157 transitions. [2024-06-27 21:36:29,298 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36511627906976746 [2024-06-27 21:36:29,298 INFO L175 Difference]: Start difference. First operand has 368 places, 454 transitions, 6608 flow. Second operand 10 states and 157 transitions. [2024-06-27 21:36:29,299 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 377 places, 478 transitions, 7844 flow [2024-06-27 21:36:31,671 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 366 places, 478 transitions, 7398 flow, removed 0 selfloop flow, removed 11 redundant places. [2024-06-27 21:36:31,677 INFO L231 Difference]: Finished difference. Result has 367 places, 454 transitions, 6250 flow [2024-06-27 21:36:31,677 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=6162, PETRI_DIFFERENCE_MINUEND_PLACES=357, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=454, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=414, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=6250, PETRI_PLACES=367, PETRI_TRANSITIONS=454} [2024-06-27 21:36:31,677 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 323 predicate places. [2024-06-27 21:36:31,677 INFO L495 AbstractCegarLoop]: Abstraction has has 367 places, 454 transitions, 6250 flow [2024-06-27 21:36:31,678 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.0) internal successors, (90), 9 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:36:31,678 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:36:31,678 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:36:31,678 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable118 [2024-06-27 21:36:31,678 INFO L420 AbstractCegarLoop]: === Iteration 120 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:36:31,678 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:36:31,678 INFO L85 PathProgramCache]: Analyzing trace with hash -1271389998, now seen corresponding path program 18 times [2024-06-27 21:36:31,679 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:36:31,679 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [795422756] [2024-06-27 21:36:31,679 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:36:31,679 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:36:31,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:36:34,153 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:36:34,154 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:36:34,154 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [795422756] [2024-06-27 21:36:34,154 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [795422756] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:36:34,154 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:36:34,154 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:36:34,154 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1992645999] [2024-06-27 21:36:34,154 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:36:34,155 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:36:34,155 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:36:34,155 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:36:34,155 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:36:34,166 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-27 21:36:34,166 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 367 places, 454 transitions, 6250 flow. Second operand has 9 states, 9 states have (on average 10.0) internal successors, (90), 9 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:36:34,166 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:36:34,166 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-27 21:36:34,166 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:36:36,471 INFO L124 PetriNetUnfolderBase]: 3783/5956 cut-off events. [2024-06-27 21:36:36,472 INFO L125 PetriNetUnfolderBase]: For 1074283/1074283 co-relation queries the response was YES. [2024-06-27 21:36:36,537 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46990 conditions, 5956 events. 3783/5956 cut-off events. For 1074283/1074283 co-relation queries the response was YES. Maximal size of possible extension queue 396. Compared 35948 event pairs, 874 based on Foata normal form. 4/5960 useless extension candidates. Maximal degree in co-relation 46821. Up to 5562 conditions per place. [2024-06-27 21:36:36,563 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 437 selfloop transitions, 48 changer transitions 0/490 dead transitions. [2024-06-27 21:36:36,563 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 378 places, 490 transitions, 7660 flow [2024-06-27 21:36:36,564 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-27 21:36:36,564 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-27 21:36:36,564 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 185 transitions. [2024-06-27 21:36:36,564 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.35852713178294576 [2024-06-27 21:36:36,564 INFO L175 Difference]: Start difference. First operand has 367 places, 454 transitions, 6250 flow. Second operand 12 states and 185 transitions. [2024-06-27 21:36:36,564 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 378 places, 490 transitions, 7660 flow [2024-06-27 21:36:38,964 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 371 places, 490 transitions, 7588 flow, removed 4 selfloop flow, removed 7 redundant places. [2024-06-27 21:36:38,970 INFO L231 Difference]: Finished difference. Result has 372 places, 460 transitions, 6416 flow [2024-06-27 21:36:38,970 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=6186, PETRI_DIFFERENCE_MINUEND_PLACES=360, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=454, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=42, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=412, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=6416, PETRI_PLACES=372, PETRI_TRANSITIONS=460} [2024-06-27 21:36:38,970 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 328 predicate places. [2024-06-27 21:36:38,971 INFO L495 AbstractCegarLoop]: Abstraction has has 372 places, 460 transitions, 6416 flow [2024-06-27 21:36:38,971 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.0) internal successors, (90), 9 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:36:38,971 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:36:38,971 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:36:38,971 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable119 [2024-06-27 21:36:38,971 INFO L420 AbstractCegarLoop]: === Iteration 121 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:36:38,971 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:36:38,972 INFO L85 PathProgramCache]: Analyzing trace with hash 1317863816, now seen corresponding path program 19 times [2024-06-27 21:36:38,972 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:36:38,972 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1725797634] [2024-06-27 21:36:38,972 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:36:38,972 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:36:38,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:36:41,314 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:36:41,314 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:36:41,314 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1725797634] [2024-06-27 21:36:41,314 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1725797634] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:36:41,314 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:36:41,314 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:36:41,315 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1488749065] [2024-06-27 21:36:41,315 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:36:41,315 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:36:41,315 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:36:41,315 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:36:41,315 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:36:41,328 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-27 21:36:41,329 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 372 places, 460 transitions, 6416 flow. Second operand has 9 states, 9 states have (on average 10.0) internal successors, (90), 9 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:36:41,329 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:36:41,329 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-27 21:36:41,329 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:36:43,221 INFO L124 PetriNetUnfolderBase]: 3823/6003 cut-off events. [2024-06-27 21:36:43,221 INFO L125 PetriNetUnfolderBase]: For 1117424/1117424 co-relation queries the response was YES. [2024-06-27 21:36:43,282 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47464 conditions, 6003 events. 3823/6003 cut-off events. For 1117424/1117424 co-relation queries the response was YES. Maximal size of possible extension queue 401. Compared 36099 event pairs, 837 based on Foata normal form. 8/6009 useless extension candidates. Maximal degree in co-relation 47294. Up to 5168 conditions per place. [2024-06-27 21:36:43,304 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 345 selfloop transitions, 145 changer transitions 0/495 dead transitions. [2024-06-27 21:36:43,305 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 381 places, 495 transitions, 8048 flow [2024-06-27 21:36:43,305 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 21:36:43,305 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 21:36:43,306 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 173 transitions. [2024-06-27 21:36:43,306 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40232558139534885 [2024-06-27 21:36:43,306 INFO L175 Difference]: Start difference. First operand has 372 places, 460 transitions, 6416 flow. Second operand 10 states and 173 transitions. [2024-06-27 21:36:43,306 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 381 places, 495 transitions, 8048 flow [2024-06-27 21:36:46,348 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 373 places, 495 transitions, 7961 flow, removed 4 selfloop flow, removed 8 redundant places. [2024-06-27 21:36:46,354 INFO L231 Difference]: Finished difference. Result has 374 places, 466 transitions, 6717 flow [2024-06-27 21:36:46,354 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=6329, PETRI_DIFFERENCE_MINUEND_PLACES=364, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=460, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=139, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=321, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=6717, PETRI_PLACES=374, PETRI_TRANSITIONS=466} [2024-06-27 21:36:46,354 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 330 predicate places. [2024-06-27 21:36:46,354 INFO L495 AbstractCegarLoop]: Abstraction has has 374 places, 466 transitions, 6717 flow [2024-06-27 21:36:46,355 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.0) internal successors, (90), 9 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:36:46,355 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:36:46,355 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:36:46,355 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable120 [2024-06-27 21:36:46,355 INFO L420 AbstractCegarLoop]: === Iteration 122 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:36:46,355 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:36:46,355 INFO L85 PathProgramCache]: Analyzing trace with hash -717230318, now seen corresponding path program 20 times [2024-06-27 21:36:46,356 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:36:46,356 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [752045556] [2024-06-27 21:36:46,356 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:36:46,356 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:36:46,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:36:48,734 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:36:48,735 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:36:48,735 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [752045556] [2024-06-27 21:36:48,735 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [752045556] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:36:48,735 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:36:48,735 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:36:48,735 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [725417946] [2024-06-27 21:36:48,735 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:36:48,736 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:36:48,736 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:36:48,736 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:36:48,736 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:36:48,791 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-27 21:36:48,791 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 374 places, 466 transitions, 6717 flow. Second operand has 9 states, 9 states have (on average 10.0) internal successors, (90), 9 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:36:48,792 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:36:48,792 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-27 21:36:48,792 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:36:50,978 INFO L124 PetriNetUnfolderBase]: 3799/5969 cut-off events. [2024-06-27 21:36:50,979 INFO L125 PetriNetUnfolderBase]: For 1078734/1078734 co-relation queries the response was YES. [2024-06-27 21:36:51,035 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46892 conditions, 5969 events. 3799/5969 cut-off events. For 1078734/1078734 co-relation queries the response was YES. Maximal size of possible extension queue 401. Compared 35897 event pairs, 829 based on Foata normal form. 8/5975 useless extension candidates. Maximal degree in co-relation 46721. Up to 5152 conditions per place. [2024-06-27 21:36:51,054 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 348 selfloop transitions, 144 changer transitions 0/497 dead transitions. [2024-06-27 21:36:51,054 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 384 places, 497 transitions, 8273 flow [2024-06-27 21:36:51,055 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-27 21:36:51,055 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-27 21:36:51,055 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 187 transitions. [2024-06-27 21:36:51,056 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3953488372093023 [2024-06-27 21:36:51,056 INFO L175 Difference]: Start difference. First operand has 374 places, 466 transitions, 6717 flow. Second operand 11 states and 187 transitions. [2024-06-27 21:36:51,056 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 384 places, 497 transitions, 8273 flow [2024-06-27 21:36:53,877 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 378 places, 497 transitions, 8057 flow, removed 10 selfloop flow, removed 6 redundant places. [2024-06-27 21:36:53,882 INFO L231 Difference]: Finished difference. Result has 379 places, 466 transitions, 6802 flow [2024-06-27 21:36:53,883 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=6501, PETRI_DIFFERENCE_MINUEND_PLACES=368, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=466, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=144, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=322, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=6802, PETRI_PLACES=379, PETRI_TRANSITIONS=466} [2024-06-27 21:36:53,883 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 335 predicate places. [2024-06-27 21:36:53,883 INFO L495 AbstractCegarLoop]: Abstraction has has 379 places, 466 transitions, 6802 flow [2024-06-27 21:36:53,883 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.0) internal successors, (90), 9 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:36:53,883 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:36:53,883 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:36:53,884 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable121 [2024-06-27 21:36:53,884 INFO L420 AbstractCegarLoop]: === Iteration 123 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:36:53,884 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:36:53,884 INFO L85 PathProgramCache]: Analyzing trace with hash 248246564, now seen corresponding path program 21 times [2024-06-27 21:36:53,884 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:36:53,884 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [193069067] [2024-06-27 21:36:53,884 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:36:53,885 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:36:53,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:36:56,252 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:36:56,252 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:36:56,252 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [193069067] [2024-06-27 21:36:56,252 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [193069067] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:36:56,252 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:36:56,252 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:36:56,253 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [214471125] [2024-06-27 21:36:56,253 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:36:56,253 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:36:56,253 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:36:56,253 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:36:56,253 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:36:56,266 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-27 21:36:56,266 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 379 places, 466 transitions, 6802 flow. Second operand has 9 states, 9 states have (on average 10.0) internal successors, (90), 9 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:36:56,266 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:36:56,266 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-27 21:36:56,266 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:36:58,150 INFO L124 PetriNetUnfolderBase]: 3787/5964 cut-off events. [2024-06-27 21:36:58,151 INFO L125 PetriNetUnfolderBase]: For 1041670/1041670 co-relation queries the response was YES. [2024-06-27 21:36:58,222 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46500 conditions, 5964 events. 3787/5964 cut-off events. For 1041670/1041670 co-relation queries the response was YES. Maximal size of possible extension queue 399. Compared 36041 event pairs, 870 based on Foata normal form. 4/5968 useless extension candidates. Maximal degree in co-relation 46328. Up to 5654 conditions per place. [2024-06-27 21:36:58,250 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 453 selfloop transitions, 30 changer transitions 0/488 dead transitions. [2024-06-27 21:36:58,250 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 387 places, 488 transitions, 7820 flow [2024-06-27 21:36:58,251 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 21:36:58,251 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 21:36:58,251 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 143 transitions. [2024-06-27 21:36:58,252 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3695090439276486 [2024-06-27 21:36:58,252 INFO L175 Difference]: Start difference. First operand has 379 places, 466 transitions, 6802 flow. Second operand 9 states and 143 transitions. [2024-06-27 21:36:58,252 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 387 places, 488 transitions, 7820 flow [2024-06-27 21:37:00,592 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 379 places, 488 transitions, 7563 flow, removed 6 selfloop flow, removed 8 redundant places. [2024-06-27 21:37:00,597 INFO L231 Difference]: Finished difference. Result has 380 places, 466 transitions, 6611 flow [2024-06-27 21:37:00,597 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=6545, PETRI_DIFFERENCE_MINUEND_PLACES=371, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=466, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=436, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6611, PETRI_PLACES=380, PETRI_TRANSITIONS=466} [2024-06-27 21:37:00,598 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 336 predicate places. [2024-06-27 21:37:00,598 INFO L495 AbstractCegarLoop]: Abstraction has has 380 places, 466 transitions, 6611 flow [2024-06-27 21:37:00,598 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.0) internal successors, (90), 9 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:37:00,598 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:37:00,598 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:37:00,598 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable122 [2024-06-27 21:37:00,598 INFO L420 AbstractCegarLoop]: === Iteration 124 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:37:00,599 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:37:00,599 INFO L85 PathProgramCache]: Analyzing trace with hash 247801094, now seen corresponding path program 22 times [2024-06-27 21:37:00,599 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:37:00,599 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [989274776] [2024-06-27 21:37:00,599 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:37:00,599 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:37:00,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:37:03,033 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:37:03,033 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:37:03,033 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [989274776] [2024-06-27 21:37:03,033 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [989274776] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:37:03,033 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:37:03,033 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:37:03,033 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1786465511] [2024-06-27 21:37:03,033 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:37:03,034 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:37:03,034 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:37:03,034 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:37:03,034 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:37:03,051 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-27 21:37:03,051 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 380 places, 466 transitions, 6611 flow. Second operand has 9 states, 9 states have (on average 10.0) internal successors, (90), 9 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:37:03,051 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:37:03,051 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-27 21:37:03,051 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:37:04,895 INFO L124 PetriNetUnfolderBase]: 3775/5937 cut-off events. [2024-06-27 21:37:04,896 INFO L125 PetriNetUnfolderBase]: For 1022136/1022136 co-relation queries the response was YES. [2024-06-27 21:37:04,955 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45615 conditions, 5937 events. 3775/5937 cut-off events. For 1022136/1022136 co-relation queries the response was YES. Maximal size of possible extension queue 401. Compared 35694 event pairs, 837 based on Foata normal form. 4/5939 useless extension candidates. Maximal degree in co-relation 45442. Up to 5136 conditions per place. [2024-06-27 21:37:04,974 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 338 selfloop transitions, 148 changer transitions 0/491 dead transitions. [2024-06-27 21:37:04,975 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 388 places, 491 transitions, 8133 flow [2024-06-27 21:37:04,976 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 21:37:04,976 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 21:37:04,976 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 154 transitions. [2024-06-27 21:37:04,976 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3979328165374677 [2024-06-27 21:37:04,976 INFO L175 Difference]: Start difference. First operand has 380 places, 466 transitions, 6611 flow. Second operand 9 states and 154 transitions. [2024-06-27 21:37:04,976 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 388 places, 491 transitions, 8133 flow [2024-06-27 21:37:07,584 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 379 places, 491 transitions, 8037 flow, removed 4 selfloop flow, removed 9 redundant places. [2024-06-27 21:37:07,590 INFO L231 Difference]: Finished difference. Result has 380 places, 466 transitions, 6817 flow [2024-06-27 21:37:07,590 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=6515, PETRI_DIFFERENCE_MINUEND_PLACES=371, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=466, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=148, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=318, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6817, PETRI_PLACES=380, PETRI_TRANSITIONS=466} [2024-06-27 21:37:07,590 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 336 predicate places. [2024-06-27 21:37:07,590 INFO L495 AbstractCegarLoop]: Abstraction has has 380 places, 466 transitions, 6817 flow [2024-06-27 21:37:07,590 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.0) internal successors, (90), 9 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:37:07,590 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:37:07,591 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:37:07,591 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable123 [2024-06-27 21:37:07,591 INFO L420 AbstractCegarLoop]: === Iteration 125 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:37:07,591 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:37:07,591 INFO L85 PathProgramCache]: Analyzing trace with hash 1843528530, now seen corresponding path program 1 times [2024-06-27 21:37:07,591 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:37:07,591 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1663473859] [2024-06-27 21:37:07,592 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:37:07,592 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:37:07,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:37:11,297 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:37:11,297 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:37:11,297 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1663473859] [2024-06-27 21:37:11,297 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1663473859] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:37:11,297 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:37:11,297 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 21:37:11,298 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [226108058] [2024-06-27 21:37:11,298 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:37:11,298 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 21:37:11,298 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:37:11,298 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 21:37:11,298 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2024-06-27 21:37:11,333 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-27 21:37:11,333 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 380 places, 466 transitions, 6817 flow. Second operand has 11 states, 11 states have (on average 9.727272727272727) internal successors, (107), 11 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:37:11,333 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:37:11,333 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-27 21:37:11,333 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:37:13,759 INFO L124 PetriNetUnfolderBase]: 3785/5964 cut-off events. [2024-06-27 21:37:13,759 INFO L125 PetriNetUnfolderBase]: For 1009755/1009757 co-relation queries the response was YES. [2024-06-27 21:37:13,826 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45226 conditions, 5964 events. 3785/5964 cut-off events. For 1009755/1009757 co-relation queries the response was YES. Maximal size of possible extension queue 401. Compared 35907 event pairs, 796 based on Foata normal form. 10/5974 useless extension candidates. Maximal degree in co-relation 45052. Up to 5474 conditions per place. [2024-06-27 21:37:13,850 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 445 selfloop transitions, 54 changer transitions 0/504 dead transitions. [2024-06-27 21:37:13,850 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 390 places, 504 transitions, 7936 flow [2024-06-27 21:37:13,851 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-27 21:37:13,851 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-27 21:37:13,851 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 179 transitions. [2024-06-27 21:37:13,852 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3784355179704017 [2024-06-27 21:37:13,852 INFO L175 Difference]: Start difference. First operand has 380 places, 466 transitions, 6817 flow. Second operand 11 states and 179 transitions. [2024-06-27 21:37:13,852 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 390 places, 504 transitions, 7936 flow [2024-06-27 21:37:16,568 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 375 places, 504 transitions, 7124 flow, removed 0 selfloop flow, removed 15 redundant places. [2024-06-27 21:37:16,574 INFO L231 Difference]: Finished difference. Result has 377 places, 467 transitions, 6136 flow [2024-06-27 21:37:16,574 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=6005, PETRI_DIFFERENCE_MINUEND_PLACES=365, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=466, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=53, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=412, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=6136, PETRI_PLACES=377, PETRI_TRANSITIONS=467} [2024-06-27 21:37:16,574 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 333 predicate places. [2024-06-27 21:37:16,575 INFO L495 AbstractCegarLoop]: Abstraction has has 377 places, 467 transitions, 6136 flow [2024-06-27 21:37:16,575 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 9.727272727272727) internal successors, (107), 11 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:37:16,575 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:37:16,575 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:37:16,575 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable124 [2024-06-27 21:37:16,575 INFO L420 AbstractCegarLoop]: === Iteration 126 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:37:16,576 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:37:16,576 INFO L85 PathProgramCache]: Analyzing trace with hash -1650691852, now seen corresponding path program 2 times [2024-06-27 21:37:16,576 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:37:16,576 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2066811816] [2024-06-27 21:37:16,576 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:37:16,576 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:37:16,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:37:19,712 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:37:19,712 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:37:19,712 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2066811816] [2024-06-27 21:37:19,712 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2066811816] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:37:19,712 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:37:19,712 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:37:19,712 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1324597471] [2024-06-27 21:37:19,713 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:37:19,713 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:37:19,713 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:37:19,713 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:37:19,713 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:37:19,757 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-27 21:37:19,758 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 377 places, 467 transitions, 6136 flow. Second operand has 10 states, 10 states have (on average 9.9) internal successors, (99), 10 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:37:19,758 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:37:19,758 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-27 21:37:19,758 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:37:21,891 INFO L124 PetriNetUnfolderBase]: 3767/5946 cut-off events. [2024-06-27 21:37:21,891 INFO L125 PetriNetUnfolderBase]: For 951902/951902 co-relation queries the response was YES. [2024-06-27 21:37:21,958 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43486 conditions, 5946 events. 3767/5946 cut-off events. For 951902/951902 co-relation queries the response was YES. Maximal size of possible extension queue 402. Compared 35908 event pairs, 838 based on Foata normal form. 8/5954 useless extension candidates. Maximal degree in co-relation 43311. Up to 5524 conditions per place. [2024-06-27 21:37:21,979 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 456 selfloop transitions, 35 changer transitions 0/496 dead transitions. [2024-06-27 21:37:21,980 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 386 places, 496 transitions, 7210 flow [2024-06-27 21:37:21,980 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 21:37:21,980 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 21:37:21,981 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 158 transitions. [2024-06-27 21:37:21,981 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3674418604651163 [2024-06-27 21:37:21,981 INFO L175 Difference]: Start difference. First operand has 377 places, 467 transitions, 6136 flow. Second operand 10 states and 158 transitions. [2024-06-27 21:37:21,981 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 386 places, 496 transitions, 7210 flow [2024-06-27 21:37:25,469 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 377 places, 496 transitions, 7068 flow, removed 13 selfloop flow, removed 9 redundant places. [2024-06-27 21:37:25,474 INFO L231 Difference]: Finished difference. Result has 378 places, 467 transitions, 6070 flow [2024-06-27 21:37:25,475 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=5994, PETRI_DIFFERENCE_MINUEND_PLACES=368, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=467, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=432, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=6070, PETRI_PLACES=378, PETRI_TRANSITIONS=467} [2024-06-27 21:37:25,475 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 334 predicate places. [2024-06-27 21:37:25,475 INFO L495 AbstractCegarLoop]: Abstraction has has 378 places, 467 transitions, 6070 flow [2024-06-27 21:37:25,475 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.9) internal successors, (99), 10 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:37:25,475 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:37:25,475 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:37:25,476 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable125 [2024-06-27 21:37:25,476 INFO L420 AbstractCegarLoop]: === Iteration 127 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:37:25,476 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:37:25,476 INFO L85 PathProgramCache]: Analyzing trace with hash -1031158343, now seen corresponding path program 1 times [2024-06-27 21:37:25,476 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:37:25,476 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [756130873] [2024-06-27 21:37:25,476 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:37:25,477 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:37:25,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:37:28,414 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:37:28,414 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:37:28,414 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [756130873] [2024-06-27 21:37:28,415 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [756130873] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:37:28,415 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:37:28,415 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:37:28,415 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [497960207] [2024-06-27 21:37:28,415 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:37:28,415 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:37:28,415 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:37:28,416 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:37:28,416 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:37:28,456 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-27 21:37:28,456 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 378 places, 467 transitions, 6070 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:37:28,456 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:37:28,456 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-27 21:37:28,456 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:37:30,790 INFO L124 PetriNetUnfolderBase]: 3855/6099 cut-off events. [2024-06-27 21:37:30,791 INFO L125 PetriNetUnfolderBase]: For 965780/965780 co-relation queries the response was YES. [2024-06-27 21:37:30,857 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43993 conditions, 6099 events. 3855/6099 cut-off events. For 965780/965780 co-relation queries the response was YES. Maximal size of possible extension queue 412. Compared 37116 event pairs, 771 based on Foata normal form. 8/6107 useless extension candidates. Maximal degree in co-relation 43818. Up to 5449 conditions per place. [2024-06-27 21:37:30,879 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 461 selfloop transitions, 53 changer transitions 0/519 dead transitions. [2024-06-27 21:37:30,880 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 386 places, 519 transitions, 7570 flow [2024-06-27 21:37:30,880 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 21:37:30,880 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 21:37:30,881 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 169 transitions. [2024-06-27 21:37:30,881 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43669250645994834 [2024-06-27 21:37:30,881 INFO L175 Difference]: Start difference. First operand has 378 places, 467 transitions, 6070 flow. Second operand 9 states and 169 transitions. [2024-06-27 21:37:30,881 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 386 places, 519 transitions, 7570 flow [2024-06-27 21:37:35,051 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 378 places, 519 transitions, 7477 flow, removed 6 selfloop flow, removed 8 redundant places. [2024-06-27 21:37:35,057 INFO L231 Difference]: Finished difference. Result has 380 places, 471 transitions, 6174 flow [2024-06-27 21:37:35,057 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=5977, PETRI_DIFFERENCE_MINUEND_PLACES=370, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=467, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=49, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=415, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6174, PETRI_PLACES=380, PETRI_TRANSITIONS=471} [2024-06-27 21:37:35,058 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 336 predicate places. [2024-06-27 21:37:35,058 INFO L495 AbstractCegarLoop]: Abstraction has has 380 places, 471 transitions, 6174 flow [2024-06-27 21:37:35,058 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:37:35,058 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:37:35,058 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:37:35,058 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable126 [2024-06-27 21:37:35,058 INFO L420 AbstractCegarLoop]: === Iteration 128 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:37:35,059 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:37:35,059 INFO L85 PathProgramCache]: Analyzing trace with hash -765461063, now seen corresponding path program 2 times [2024-06-27 21:37:35,059 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:37:35,059 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2089015012] [2024-06-27 21:37:35,059 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:37:35,061 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:37:35,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:37:38,273 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:37:38,274 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:37:38,274 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2089015012] [2024-06-27 21:37:38,274 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2089015012] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:37:38,274 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:37:38,274 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:37:38,274 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [750519788] [2024-06-27 21:37:38,274 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:37:38,274 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:37:38,274 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:37:38,274 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:37:38,275 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:37:38,341 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-27 21:37:38,341 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 380 places, 471 transitions, 6174 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:37:38,341 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:37:38,341 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-27 21:37:38,341 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:37:40,684 INFO L124 PetriNetUnfolderBase]: 3929/6217 cut-off events. [2024-06-27 21:37:40,684 INFO L125 PetriNetUnfolderBase]: For 983141/983141 co-relation queries the response was YES. [2024-06-27 21:37:40,751 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44814 conditions, 6217 events. 3929/6217 cut-off events. For 983141/983141 co-relation queries the response was YES. Maximal size of possible extension queue 418. Compared 38076 event pairs, 870 based on Foata normal form. 8/6225 useless extension candidates. Maximal degree in co-relation 44638. Up to 5759 conditions per place. [2024-06-27 21:37:40,773 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 465 selfloop transitions, 49 changer transitions 0/519 dead transitions. [2024-06-27 21:37:40,773 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 388 places, 519 transitions, 7429 flow [2024-06-27 21:37:40,774 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 21:37:40,774 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 21:37:40,774 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 165 transitions. [2024-06-27 21:37:40,775 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4263565891472868 [2024-06-27 21:37:40,775 INFO L175 Difference]: Start difference. First operand has 380 places, 471 transitions, 6174 flow. Second operand 9 states and 165 transitions. [2024-06-27 21:37:40,775 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 388 places, 519 transitions, 7429 flow [2024-06-27 21:37:44,214 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 379 places, 519 transitions, 7044 flow, removed 22 selfloop flow, removed 9 redundant places. [2024-06-27 21:37:44,219 INFO L231 Difference]: Finished difference. Result has 381 places, 476 transitions, 5982 flow [2024-06-27 21:37:44,220 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=5796, PETRI_DIFFERENCE_MINUEND_PLACES=371, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=471, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=44, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=425, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5982, PETRI_PLACES=381, PETRI_TRANSITIONS=476} [2024-06-27 21:37:44,220 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 337 predicate places. [2024-06-27 21:37:44,221 INFO L495 AbstractCegarLoop]: Abstraction has has 381 places, 476 transitions, 5982 flow [2024-06-27 21:37:44,221 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:37:44,221 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:37:44,221 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:37:44,221 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable127 [2024-06-27 21:37:44,221 INFO L420 AbstractCegarLoop]: === Iteration 129 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:37:44,221 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:37:44,222 INFO L85 PathProgramCache]: Analyzing trace with hash -2135512319, now seen corresponding path program 1 times [2024-06-27 21:37:44,222 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:37:44,222 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1662297849] [2024-06-27 21:37:44,222 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:37:44,222 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:37:44,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:37:46,601 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:37:46,602 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:37:46,602 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1662297849] [2024-06-27 21:37:46,602 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1662297849] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:37:46,602 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:37:46,602 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:37:46,602 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [703363102] [2024-06-27 21:37:46,602 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:37:46,603 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:37:46,603 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:37:46,603 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:37:46,603 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:37:46,643 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-27 21:37:46,643 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 381 places, 476 transitions, 5982 flow. Second operand has 9 states, 9 states have (on average 10.0) internal successors, (90), 9 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:37:46,643 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:37:46,643 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-27 21:37:46,644 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:37:48,693 INFO L124 PetriNetUnfolderBase]: 3939/6219 cut-off events. [2024-06-27 21:37:48,693 INFO L125 PetriNetUnfolderBase]: For 946846/946846 co-relation queries the response was YES. [2024-06-27 21:37:48,757 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44439 conditions, 6219 events. 3939/6219 cut-off events. For 946846/946846 co-relation queries the response was YES. Maximal size of possible extension queue 420. Compared 37996 event pairs, 933 based on Foata normal form. 2/6221 useless extension candidates. Maximal degree in co-relation 44265. Up to 5840 conditions per place. [2024-06-27 21:37:48,778 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 462 selfloop transitions, 53 changer transitions 0/520 dead transitions. [2024-06-27 21:37:48,778 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 389 places, 520 transitions, 7426 flow [2024-06-27 21:37:48,779 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 21:37:48,779 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 21:37:48,779 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 164 transitions. [2024-06-27 21:37:48,779 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42377260981912146 [2024-06-27 21:37:48,779 INFO L175 Difference]: Start difference. First operand has 381 places, 476 transitions, 5982 flow. Second operand 9 states and 164 transitions. [2024-06-27 21:37:48,779 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 389 places, 520 transitions, 7426 flow [2024-06-27 21:37:52,642 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 384 places, 520 transitions, 7318 flow, removed 10 selfloop flow, removed 5 redundant places. [2024-06-27 21:37:52,648 INFO L231 Difference]: Finished difference. Result has 385 places, 479 transitions, 6030 flow [2024-06-27 21:37:52,648 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=5874, PETRI_DIFFERENCE_MINUEND_PLACES=376, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=476, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=50, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=426, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6030, PETRI_PLACES=385, PETRI_TRANSITIONS=479} [2024-06-27 21:37:52,648 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 341 predicate places. [2024-06-27 21:37:52,648 INFO L495 AbstractCegarLoop]: Abstraction has has 385 places, 479 transitions, 6030 flow [2024-06-27 21:37:52,649 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.0) internal successors, (90), 9 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:37:52,649 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:37:52,649 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:37:52,649 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable128 [2024-06-27 21:37:52,649 INFO L420 AbstractCegarLoop]: === Iteration 130 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:37:52,649 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:37:52,649 INFO L85 PathProgramCache]: Analyzing trace with hash -942500513, now seen corresponding path program 2 times [2024-06-27 21:37:52,649 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:37:52,650 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2098133979] [2024-06-27 21:37:52,650 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:37:52,650 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:37:52,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:37:55,694 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:37:55,694 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:37:55,694 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2098133979] [2024-06-27 21:37:55,694 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2098133979] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:37:55,694 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:37:55,694 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:37:55,695 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [43861893] [2024-06-27 21:37:55,695 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:37:55,695 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:37:55,695 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:37:55,695 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:37:55,695 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:37:55,725 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-27 21:37:55,725 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 385 places, 479 transitions, 6030 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:37:55,725 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:37:55,725 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-27 21:37:55,725 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:37:57,976 INFO L124 PetriNetUnfolderBase]: 3933/6215 cut-off events. [2024-06-27 21:37:57,976 INFO L125 PetriNetUnfolderBase]: For 943137/943137 co-relation queries the response was YES. [2024-06-27 21:37:58,040 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44087 conditions, 6215 events. 3933/6215 cut-off events. For 943137/943137 co-relation queries the response was YES. Maximal size of possible extension queue 420. Compared 38037 event pairs, 934 based on Foata normal form. 2/6217 useless extension candidates. Maximal degree in co-relation 43912. Up to 5835 conditions per place. [2024-06-27 21:37:58,061 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 462 selfloop transitions, 53 changer transitions 0/520 dead transitions. [2024-06-27 21:37:58,061 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 394 places, 520 transitions, 7176 flow [2024-06-27 21:37:58,062 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 21:37:58,062 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 21:37:58,062 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 175 transitions. [2024-06-27 21:37:58,062 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4069767441860465 [2024-06-27 21:37:58,062 INFO L175 Difference]: Start difference. First operand has 385 places, 479 transitions, 6030 flow. Second operand 10 states and 175 transitions. [2024-06-27 21:37:58,062 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 394 places, 520 transitions, 7176 flow [2024-06-27 21:38:01,168 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 387 places, 520 transitions, 7056 flow, removed 8 selfloop flow, removed 7 redundant places. [2024-06-27 21:38:01,173 INFO L231 Difference]: Finished difference. Result has 388 places, 479 transitions, 6022 flow [2024-06-27 21:38:01,174 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=5910, PETRI_DIFFERENCE_MINUEND_PLACES=378, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=479, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=53, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=426, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=6022, PETRI_PLACES=388, PETRI_TRANSITIONS=479} [2024-06-27 21:38:01,174 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 344 predicate places. [2024-06-27 21:38:01,174 INFO L495 AbstractCegarLoop]: Abstraction has has 388 places, 479 transitions, 6022 flow [2024-06-27 21:38:01,174 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:38:01,174 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:38:01,174 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:38:01,175 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable129 [2024-06-27 21:38:01,175 INFO L420 AbstractCegarLoop]: === Iteration 131 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:38:01,175 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:38:01,175 INFO L85 PathProgramCache]: Analyzing trace with hash -942500327, now seen corresponding path program 1 times [2024-06-27 21:38:01,175 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:38:01,175 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1996756958] [2024-06-27 21:38:01,175 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:38:01,176 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:38:01,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:38:04,263 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:38:04,264 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:38:04,264 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1996756958] [2024-06-27 21:38:04,264 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1996756958] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:38:04,264 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:38:04,264 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:38:04,264 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [506809889] [2024-06-27 21:38:04,264 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:38:04,264 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:38:04,264 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:38:04,264 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:38:04,264 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:38:04,299 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-27 21:38:04,299 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 388 places, 479 transitions, 6022 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:38:04,299 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:38:04,299 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-27 21:38:04,299 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:38:06,714 INFO L124 PetriNetUnfolderBase]: 3975/6281 cut-off events. [2024-06-27 21:38:06,714 INFO L125 PetriNetUnfolderBase]: For 992877/992877 co-relation queries the response was YES. [2024-06-27 21:38:06,779 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45108 conditions, 6281 events. 3975/6281 cut-off events. For 992877/992877 co-relation queries the response was YES. Maximal size of possible extension queue 424. Compared 38473 event pairs, 884 based on Foata normal form. 2/6283 useless extension candidates. Maximal degree in co-relation 44932. Up to 5654 conditions per place. [2024-06-27 21:38:06,800 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 428 selfloop transitions, 100 changer transitions 0/533 dead transitions. [2024-06-27 21:38:06,801 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 397 places, 533 transitions, 7848 flow [2024-06-27 21:38:06,802 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 21:38:06,802 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 21:38:06,802 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 187 transitions. [2024-06-27 21:38:06,802 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43488372093023253 [2024-06-27 21:38:06,802 INFO L175 Difference]: Start difference. First operand has 388 places, 479 transitions, 6022 flow. Second operand 10 states and 187 transitions. [2024-06-27 21:38:06,802 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 397 places, 533 transitions, 7848 flow [2024-06-27 21:38:10,992 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 390 places, 533 transitions, 7748 flow, removed 6 selfloop flow, removed 7 redundant places. [2024-06-27 21:38:10,998 INFO L231 Difference]: Finished difference. Result has 392 places, 485 transitions, 6298 flow [2024-06-27 21:38:10,998 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=5922, PETRI_DIFFERENCE_MINUEND_PLACES=381, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=479, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=96, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=381, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=6298, PETRI_PLACES=392, PETRI_TRANSITIONS=485} [2024-06-27 21:38:11,010 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 348 predicate places. [2024-06-27 21:38:11,010 INFO L495 AbstractCegarLoop]: Abstraction has has 392 places, 485 transitions, 6298 flow [2024-06-27 21:38:11,011 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:38:11,011 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:38:11,011 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:38:11,011 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable130 [2024-06-27 21:38:11,011 INFO L420 AbstractCegarLoop]: === Iteration 132 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:38:11,011 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:38:11,011 INFO L85 PathProgramCache]: Analyzing trace with hash -1728318511, now seen corresponding path program 3 times [2024-06-27 21:38:11,011 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:38:11,012 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2070534007] [2024-06-27 21:38:11,012 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:38:11,012 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:38:11,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:38:14,347 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:38:14,347 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:38:14,347 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2070534007] [2024-06-27 21:38:14,347 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2070534007] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:38:14,347 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:38:14,347 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:38:14,347 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [55140172] [2024-06-27 21:38:14,348 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:38:14,348 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:38:14,348 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:38:14,348 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:38:14,348 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:38:14,375 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-27 21:38:14,376 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 392 places, 485 transitions, 6298 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:38:14,376 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:38:14,376 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-27 21:38:14,376 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:38:16,681 INFO L124 PetriNetUnfolderBase]: 4003/6325 cut-off events. [2024-06-27 21:38:16,681 INFO L125 PetriNetUnfolderBase]: For 1063698/1063698 co-relation queries the response was YES. [2024-06-27 21:38:16,747 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46450 conditions, 6325 events. 4003/6325 cut-off events. For 1063698/1063698 co-relation queries the response was YES. Maximal size of possible extension queue 425. Compared 38694 event pairs, 886 based on Foata normal form. 8/6333 useless extension candidates. Maximal degree in co-relation 46272. Up to 5867 conditions per place. [2024-06-27 21:38:16,770 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 471 selfloop transitions, 47 changer transitions 0/523 dead transitions. [2024-06-27 21:38:16,770 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 400 places, 523 transitions, 7511 flow [2024-06-27 21:38:16,771 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 21:38:16,771 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 21:38:16,771 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 158 transitions. [2024-06-27 21:38:16,772 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4082687338501292 [2024-06-27 21:38:16,772 INFO L175 Difference]: Start difference. First operand has 392 places, 485 transitions, 6298 flow. Second operand 9 states and 158 transitions. [2024-06-27 21:38:16,772 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 400 places, 523 transitions, 7511 flow [2024-06-27 21:38:19,446 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 395 places, 523 transitions, 7311 flow, removed 70 selfloop flow, removed 5 redundant places. [2024-06-27 21:38:19,451 INFO L231 Difference]: Finished difference. Result has 397 places, 487 transitions, 6258 flow [2024-06-27 21:38:19,452 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=6100, PETRI_DIFFERENCE_MINUEND_PLACES=387, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=485, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=45, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=438, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6258, PETRI_PLACES=397, PETRI_TRANSITIONS=487} [2024-06-27 21:38:19,452 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 353 predicate places. [2024-06-27 21:38:19,452 INFO L495 AbstractCegarLoop]: Abstraction has has 397 places, 487 transitions, 6258 flow [2024-06-27 21:38:19,452 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:38:19,452 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:38:19,452 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:38:19,452 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable131 [2024-06-27 21:38:19,453 INFO L420 AbstractCegarLoop]: === Iteration 133 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:38:19,453 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:38:19,453 INFO L85 PathProgramCache]: Analyzing trace with hash -1702792937, now seen corresponding path program 3 times [2024-06-27 21:38:19,453 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:38:19,453 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1604877625] [2024-06-27 21:38:19,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:38:19,453 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:38:19,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:38:22,564 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:38:22,565 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:38:22,565 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1604877625] [2024-06-27 21:38:22,565 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1604877625] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:38:22,565 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:38:22,565 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:38:22,565 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1812699014] [2024-06-27 21:38:22,565 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:38:22,565 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:38:22,565 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:38:22,565 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:38:22,565 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=59, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:38:22,584 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-27 21:38:22,585 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 397 places, 487 transitions, 6258 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:38:22,585 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:38:22,585 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-27 21:38:22,585 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:38:24,986 INFO L124 PetriNetUnfolderBase]: 4061/6418 cut-off events. [2024-06-27 21:38:24,986 INFO L125 PetriNetUnfolderBase]: For 1079539/1079541 co-relation queries the response was YES. [2024-06-27 21:38:25,056 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47924 conditions, 6418 events. 4061/6418 cut-off events. For 1079539/1079541 co-relation queries the response was YES. Maximal size of possible extension queue 431. Compared 39273 event pairs, 798 based on Foata normal form. 4/6422 useless extension candidates. Maximal degree in co-relation 47743. Up to 5412 conditions per place. [2024-06-27 21:38:25,079 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 379 selfloop transitions, 156 changer transitions 0/540 dead transitions. [2024-06-27 21:38:25,079 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 405 places, 540 transitions, 8196 flow [2024-06-27 21:38:25,080 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 21:38:25,080 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 21:38:25,080 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 169 transitions. [2024-06-27 21:38:25,080 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43669250645994834 [2024-06-27 21:38:25,081 INFO L175 Difference]: Start difference. First operand has 397 places, 487 transitions, 6258 flow. Second operand 9 states and 169 transitions. [2024-06-27 21:38:25,081 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 405 places, 540 transitions, 8196 flow [2024-06-27 21:38:28,520 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 399 places, 540 transitions, 8065 flow, removed 14 selfloop flow, removed 6 redundant places. [2024-06-27 21:38:28,526 INFO L231 Difference]: Finished difference. Result has 400 places, 499 transitions, 6675 flow [2024-06-27 21:38:28,526 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=6127, PETRI_DIFFERENCE_MINUEND_PLACES=391, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=487, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=144, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=343, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6675, PETRI_PLACES=400, PETRI_TRANSITIONS=499} [2024-06-27 21:38:28,526 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 356 predicate places. [2024-06-27 21:38:28,527 INFO L495 AbstractCegarLoop]: Abstraction has has 400 places, 499 transitions, 6675 flow [2024-06-27 21:38:28,527 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:38:28,527 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:38:28,527 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:38:28,527 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable132 [2024-06-27 21:38:28,527 INFO L420 AbstractCegarLoop]: === Iteration 134 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:38:28,527 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:38:28,527 INFO L85 PathProgramCache]: Analyzing trace with hash 1906181093, now seen corresponding path program 2 times [2024-06-27 21:38:28,528 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:38:28,528 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [104567471] [2024-06-27 21:38:28,528 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:38:28,528 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:38:28,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:38:31,273 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:38:31,274 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:38:31,274 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [104567471] [2024-06-27 21:38:31,274 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [104567471] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:38:31,274 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:38:31,274 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:38:31,274 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1709235816] [2024-06-27 21:38:31,274 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:38:31,275 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:38:31,275 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:38:31,275 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:38:31,275 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:38:31,309 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-27 21:38:31,310 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 400 places, 499 transitions, 6675 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:38:31,310 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:38:31,310 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-27 21:38:31,310 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:38:33,811 INFO L124 PetriNetUnfolderBase]: 4087/6458 cut-off events. [2024-06-27 21:38:33,812 INFO L125 PetriNetUnfolderBase]: For 1115619/1115621 co-relation queries the response was YES. [2024-06-27 21:38:33,884 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48841 conditions, 6458 events. 4087/6458 cut-off events. For 1115619/1115621 co-relation queries the response was YES. Maximal size of possible extension queue 435. Compared 39574 event pairs, 786 based on Foata normal form. 4/6462 useless extension candidates. Maximal degree in co-relation 48661. Up to 4295 conditions per place. [2024-06-27 21:38:33,911 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 283 selfloop transitions, 262 changer transitions 0/550 dead transitions. [2024-06-27 21:38:33,911 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 408 places, 550 transitions, 8949 flow [2024-06-27 21:38:33,912 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 21:38:33,912 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 21:38:33,912 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 172 transitions. [2024-06-27 21:38:33,913 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4444444444444444 [2024-06-27 21:38:33,913 INFO L175 Difference]: Start difference. First operand has 400 places, 499 transitions, 6675 flow. Second operand 9 states and 172 transitions. [2024-06-27 21:38:33,913 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 408 places, 550 transitions, 8949 flow [2024-06-27 21:38:36,440 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 402 places, 550 transitions, 8533 flow, removed 53 selfloop flow, removed 6 redundant places. [2024-06-27 21:38:36,445 INFO L231 Difference]: Finished difference. Result has 405 places, 508 transitions, 7244 flow [2024-06-27 21:38:36,446 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=6259, PETRI_DIFFERENCE_MINUEND_PLACES=394, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=499, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=255, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=242, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7244, PETRI_PLACES=405, PETRI_TRANSITIONS=508} [2024-06-27 21:38:36,451 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 361 predicate places. [2024-06-27 21:38:36,451 INFO L495 AbstractCegarLoop]: Abstraction has has 405 places, 508 transitions, 7244 flow [2024-06-27 21:38:36,451 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:38:36,451 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:38:36,452 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:38:36,452 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable133 [2024-06-27 21:38:36,452 INFO L420 AbstractCegarLoop]: === Iteration 135 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:38:36,452 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:38:36,452 INFO L85 PathProgramCache]: Analyzing trace with hash -1817305697, now seen corresponding path program 4 times [2024-06-27 21:38:36,452 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:38:36,452 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1365654644] [2024-06-27 21:38:36,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:38:36,453 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:38:36,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:38:39,484 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:38:39,485 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:38:39,485 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1365654644] [2024-06-27 21:38:39,485 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1365654644] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:38:39,485 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:38:39,485 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:38:39,485 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1967842946] [2024-06-27 21:38:39,485 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:38:39,485 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:38:39,486 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:38:39,486 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:38:39,486 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:38:39,502 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-27 21:38:39,503 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 405 places, 508 transitions, 7244 flow. Second operand has 9 states, 9 states have (on average 10.0) internal successors, (90), 9 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:38:39,503 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:38:39,503 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-27 21:38:39,503 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:38:41,873 INFO L124 PetriNetUnfolderBase]: 4161/6567 cut-off events. [2024-06-27 21:38:41,873 INFO L125 PetriNetUnfolderBase]: For 1210475/1210481 co-relation queries the response was YES. [2024-06-27 21:38:41,945 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52475 conditions, 6567 events. 4161/6567 cut-off events. For 1210475/1210481 co-relation queries the response was YES. Maximal size of possible extension queue 446. Compared 40268 event pairs, 790 based on Foata normal form. 8/6575 useless extension candidates. Maximal degree in co-relation 52292. Up to 5518 conditions per place. [2024-06-27 21:38:41,970 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 378 selfloop transitions, 178 changer transitions 0/561 dead transitions. [2024-06-27 21:38:41,970 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 412 places, 561 transitions, 9583 flow [2024-06-27 21:38:41,971 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 21:38:41,971 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 21:38:41,972 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 154 transitions. [2024-06-27 21:38:41,972 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4476744186046512 [2024-06-27 21:38:41,972 INFO L175 Difference]: Start difference. First operand has 405 places, 508 transitions, 7244 flow. Second operand 8 states and 154 transitions. [2024-06-27 21:38:41,972 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 412 places, 561 transitions, 9583 flow [2024-06-27 21:38:45,723 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 408 places, 561 transitions, 9350 flow, removed 61 selfloop flow, removed 4 redundant places. [2024-06-27 21:38:45,730 INFO L231 Difference]: Finished difference. Result has 409 places, 523 transitions, 7698 flow [2024-06-27 21:38:45,730 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=7011, PETRI_DIFFERENCE_MINUEND_PLACES=401, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=508, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=163, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=345, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7698, PETRI_PLACES=409, PETRI_TRANSITIONS=523} [2024-06-27 21:38:45,730 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 365 predicate places. [2024-06-27 21:38:45,730 INFO L495 AbstractCegarLoop]: Abstraction has has 409 places, 523 transitions, 7698 flow [2024-06-27 21:38:45,730 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.0) internal successors, (90), 9 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:38:45,731 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:38:45,731 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:38:45,731 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable134 [2024-06-27 21:38:45,731 INFO L420 AbstractCegarLoop]: === Iteration 136 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:38:45,731 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:38:45,731 INFO L85 PathProgramCache]: Analyzing trace with hash -1144184421, now seen corresponding path program 5 times [2024-06-27 21:38:45,731 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:38:45,731 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1661849207] [2024-06-27 21:38:45,732 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:38:45,732 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:38:45,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:38:48,646 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:38:48,646 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:38:48,646 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1661849207] [2024-06-27 21:38:48,647 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1661849207] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:38:48,647 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:38:48,647 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:38:48,647 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1120773898] [2024-06-27 21:38:48,647 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:38:48,647 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:38:48,647 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:38:48,648 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:38:48,648 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:38:48,669 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-27 21:38:48,669 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 409 places, 523 transitions, 7698 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:38:48,669 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:38:48,669 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-27 21:38:48,669 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:38:51,203 INFO L124 PetriNetUnfolderBase]: 4171/6580 cut-off events. [2024-06-27 21:38:51,203 INFO L125 PetriNetUnfolderBase]: For 1223793/1223795 co-relation queries the response was YES. [2024-06-27 21:38:51,277 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52387 conditions, 6580 events. 4171/6580 cut-off events. For 1223793/1223795 co-relation queries the response was YES. Maximal size of possible extension queue 447. Compared 40349 event pairs, 812 based on Foata normal form. 4/6584 useless extension candidates. Maximal degree in co-relation 52202. Up to 5528 conditions per place. [2024-06-27 21:38:51,302 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 382 selfloop transitions, 174 changer transitions 0/561 dead transitions. [2024-06-27 21:38:51,302 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 417 places, 561 transitions, 9227 flow [2024-06-27 21:38:51,302 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 21:38:51,302 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 21:38:51,303 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 162 transitions. [2024-06-27 21:38:51,303 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4186046511627907 [2024-06-27 21:38:51,303 INFO L175 Difference]: Start difference. First operand has 409 places, 523 transitions, 7698 flow. Second operand 9 states and 162 transitions. [2024-06-27 21:38:51,303 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 417 places, 561 transitions, 9227 flow [2024-06-27 21:38:55,369 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 414 places, 561 transitions, 8944 flow, removed 62 selfloop flow, removed 3 redundant places. [2024-06-27 21:38:55,375 INFO L231 Difference]: Finished difference. Result has 415 places, 526 transitions, 7820 flow [2024-06-27 21:38:55,375 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=7418, PETRI_DIFFERENCE_MINUEND_PLACES=406, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=523, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=171, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=352, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7820, PETRI_PLACES=415, PETRI_TRANSITIONS=526} [2024-06-27 21:38:55,375 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 371 predicate places. [2024-06-27 21:38:55,376 INFO L495 AbstractCegarLoop]: Abstraction has has 415 places, 526 transitions, 7820 flow [2024-06-27 21:38:55,376 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:38:55,376 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:38:55,376 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:38:55,376 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable135 [2024-06-27 21:38:55,376 INFO L420 AbstractCegarLoop]: === Iteration 137 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:38:55,376 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:38:55,377 INFO L85 PathProgramCache]: Analyzing trace with hash -934527081, now seen corresponding path program 6 times [2024-06-27 21:38:55,377 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:38:55,377 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [614915990] [2024-06-27 21:38:55,377 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:38:55,377 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:38:55,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:38:58,238 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:38:58,238 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:38:58,238 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [614915990] [2024-06-27 21:38:58,238 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [614915990] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:38:58,238 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:38:58,238 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:38:58,238 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [289577433] [2024-06-27 21:38:58,238 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:38:58,238 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:38:58,238 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:38:58,239 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:38:58,239 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:38:58,255 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-27 21:38:58,255 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 415 places, 526 transitions, 7820 flow. Second operand has 9 states, 9 states have (on average 10.0) internal successors, (90), 9 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:38:58,255 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:38:58,255 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-27 21:38:58,255 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:39:00,721 INFO L124 PetriNetUnfolderBase]: 4197/6615 cut-off events. [2024-06-27 21:39:00,721 INFO L125 PetriNetUnfolderBase]: For 1262331/1262337 co-relation queries the response was YES. [2024-06-27 21:39:00,799 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52975 conditions, 6615 events. 4197/6615 cut-off events. For 1262331/1262337 co-relation queries the response was YES. Maximal size of possible extension queue 451. Compared 40562 event pairs, 797 based on Foata normal form. 8/6623 useless extension candidates. Maximal degree in co-relation 52789. Up to 5553 conditions per place. [2024-06-27 21:39:00,825 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 376 selfloop transitions, 185 changer transitions 0/566 dead transitions. [2024-06-27 21:39:00,825 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 422 places, 566 transitions, 9970 flow [2024-06-27 21:39:00,826 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 21:39:00,826 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 21:39:00,827 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 150 transitions. [2024-06-27 21:39:00,827 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.436046511627907 [2024-06-27 21:39:00,827 INFO L175 Difference]: Start difference. First operand has 415 places, 526 transitions, 7820 flow. Second operand 8 states and 150 transitions. [2024-06-27 21:39:00,827 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 422 places, 566 transitions, 9970 flow [2024-06-27 21:39:04,098 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 416 places, 566 transitions, 9735 flow, removed 9 selfloop flow, removed 6 redundant places. [2024-06-27 21:39:04,104 INFO L231 Difference]: Finished difference. Result has 417 places, 532 transitions, 8087 flow [2024-06-27 21:39:04,105 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=7591, PETRI_DIFFERENCE_MINUEND_PLACES=409, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=526, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=179, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=347, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=8087, PETRI_PLACES=417, PETRI_TRANSITIONS=532} [2024-06-27 21:39:04,105 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 373 predicate places. [2024-06-27 21:39:04,105 INFO L495 AbstractCegarLoop]: Abstraction has has 417 places, 532 transitions, 8087 flow [2024-06-27 21:39:04,105 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.0) internal successors, (90), 9 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:39:04,105 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:39:04,105 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:39:04,105 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable136 [2024-06-27 21:39:04,106 INFO L420 AbstractCegarLoop]: === Iteration 138 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:39:04,106 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:39:04,106 INFO L85 PathProgramCache]: Analyzing trace with hash -498854561, now seen corresponding path program 7 times [2024-06-27 21:39:04,106 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:39:04,106 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [343695292] [2024-06-27 21:39:04,106 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:39:04,106 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:39:04,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:39:07,148 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:39:07,148 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:39:07,149 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [343695292] [2024-06-27 21:39:07,149 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [343695292] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:39:07,149 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:39:07,149 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:39:07,149 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1749727902] [2024-06-27 21:39:07,149 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:39:07,149 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:39:07,149 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:39:07,149 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:39:07,149 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:39:07,175 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-27 21:39:07,176 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 417 places, 532 transitions, 8087 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:39:07,176 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:39:07,176 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-27 21:39:07,176 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:39:09,912 INFO L124 PetriNetUnfolderBase]: 4191/6612 cut-off events. [2024-06-27 21:39:09,912 INFO L125 PetriNetUnfolderBase]: For 1264624/1264626 co-relation queries the response was YES. [2024-06-27 21:39:09,990 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52866 conditions, 6612 events. 4191/6612 cut-off events. For 1264624/1264626 co-relation queries the response was YES. Maximal size of possible extension queue 451. Compared 40566 event pairs, 814 based on Foata normal form. 4/6616 useless extension candidates. Maximal degree in co-relation 52679. Up to 5548 conditions per place. [2024-06-27 21:39:10,017 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 379 selfloop transitions, 179 changer transitions 0/563 dead transitions. [2024-06-27 21:39:10,017 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 425 places, 563 transitions, 9561 flow [2024-06-27 21:39:10,018 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 21:39:10,018 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 21:39:10,018 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 158 transitions. [2024-06-27 21:39:10,018 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4082687338501292 [2024-06-27 21:39:10,018 INFO L175 Difference]: Start difference. First operand has 417 places, 532 transitions, 8087 flow. Second operand 9 states and 158 transitions. [2024-06-27 21:39:10,019 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 425 places, 563 transitions, 9561 flow [2024-06-27 21:39:13,251 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 421 places, 563 transitions, 9263 flow, removed 21 selfloop flow, removed 4 redundant places. [2024-06-27 21:39:13,257 INFO L231 Difference]: Finished difference. Result has 422 places, 532 transitions, 8153 flow [2024-06-27 21:39:13,258 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=7789, PETRI_DIFFERENCE_MINUEND_PLACES=413, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=532, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=179, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=353, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8153, PETRI_PLACES=422, PETRI_TRANSITIONS=532} [2024-06-27 21:39:13,258 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 378 predicate places. [2024-06-27 21:39:13,258 INFO L495 AbstractCegarLoop]: Abstraction has has 422 places, 532 transitions, 8153 flow [2024-06-27 21:39:13,258 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:39:13,258 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:39:13,258 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:39:13,259 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable137 [2024-06-27 21:39:13,259 INFO L420 AbstractCegarLoop]: === Iteration 139 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:39:13,259 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:39:13,259 INFO L85 PathProgramCache]: Analyzing trace with hash -498647171, now seen corresponding path program 8 times [2024-06-27 21:39:13,259 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:39:13,259 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1988780920] [2024-06-27 21:39:13,260 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:39:13,260 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:39:13,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:39:16,153 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:39:16,153 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:39:16,153 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1988780920] [2024-06-27 21:39:16,153 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1988780920] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:39:16,153 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:39:16,153 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:39:16,153 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1196588089] [2024-06-27 21:39:16,154 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:39:16,154 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:39:16,154 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:39:16,154 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:39:16,154 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=59, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:39:16,165 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-27 21:39:16,165 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 422 places, 532 transitions, 8153 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:39:16,165 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:39:16,165 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-27 21:39:16,165 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:39:18,515 INFO L124 PetriNetUnfolderBase]: 4201/6630 cut-off events. [2024-06-27 21:39:18,515 INFO L125 PetriNetUnfolderBase]: For 1284424/1284426 co-relation queries the response was YES. [2024-06-27 21:39:18,593 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53111 conditions, 6630 events. 4201/6630 cut-off events. For 1284424/1284426 co-relation queries the response was YES. Maximal size of possible extension queue 454. Compared 40711 event pairs, 816 based on Foata normal form. 4/6634 useless extension candidates. Maximal degree in co-relation 52923. Up to 5558 conditions per place. [2024-06-27 21:39:18,619 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 380 selfloop transitions, 182 changer transitions 0/567 dead transitions. [2024-06-27 21:39:18,619 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 430 places, 567 transitions, 9699 flow [2024-06-27 21:39:18,620 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 21:39:18,621 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 21:39:18,621 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 160 transitions. [2024-06-27 21:39:18,621 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4134366925064599 [2024-06-27 21:39:18,621 INFO L175 Difference]: Start difference. First operand has 422 places, 532 transitions, 8153 flow. Second operand 9 states and 160 transitions. [2024-06-27 21:39:18,621 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 430 places, 567 transitions, 9699 flow [2024-06-27 21:39:22,408 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 422 places, 567 transitions, 9179 flow, removed 9 selfloop flow, removed 8 redundant places. [2024-06-27 21:39:22,415 INFO L231 Difference]: Finished difference. Result has 423 places, 535 transitions, 8063 flow [2024-06-27 21:39:22,415 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=7642, PETRI_DIFFERENCE_MINUEND_PLACES=414, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=532, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=179, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=353, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8063, PETRI_PLACES=423, PETRI_TRANSITIONS=535} [2024-06-27 21:39:22,415 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 379 predicate places. [2024-06-27 21:39:22,415 INFO L495 AbstractCegarLoop]: Abstraction has has 423 places, 535 transitions, 8063 flow [2024-06-27 21:39:22,416 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:39:22,416 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:39:22,416 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:39:22,416 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable138 [2024-06-27 21:39:22,416 INFO L420 AbstractCegarLoop]: === Iteration 140 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:39:22,416 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:39:22,416 INFO L85 PathProgramCache]: Analyzing trace with hash -498468425, now seen corresponding path program 3 times [2024-06-27 21:39:22,417 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:39:22,417 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [883188168] [2024-06-27 21:39:22,417 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:39:22,417 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:39:22,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:39:25,280 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:39:25,281 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:39:25,281 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [883188168] [2024-06-27 21:39:25,281 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [883188168] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:39:25,281 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:39:25,281 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:39:25,281 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [506951674] [2024-06-27 21:39:25,282 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:39:25,282 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:39:25,282 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:39:25,282 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:39:25,282 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:39:25,342 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-27 21:39:25,342 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 423 places, 535 transitions, 8063 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:39:25,342 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:39:25,342 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-27 21:39:25,342 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:39:28,053 INFO L124 PetriNetUnfolderBase]: 4227/6668 cut-off events. [2024-06-27 21:39:28,053 INFO L125 PetriNetUnfolderBase]: For 1320469/1320471 co-relation queries the response was YES. [2024-06-27 21:39:28,139 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53821 conditions, 6668 events. 4227/6668 cut-off events. For 1320469/1320471 co-relation queries the response was YES. Maximal size of possible extension queue 458. Compared 40965 event pairs, 792 based on Foata normal form. 4/6672 useless extension candidates. Maximal degree in co-relation 53632. Up to 4376 conditions per place. [2024-06-27 21:39:28,168 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 292 selfloop transitions, 282 changer transitions 0/579 dead transitions. [2024-06-27 21:39:28,168 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 431 places, 579 transitions, 10347 flow [2024-06-27 21:39:28,169 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 21:39:28,169 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 21:39:28,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 168 transitions. [2024-06-27 21:39:28,169 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43410852713178294 [2024-06-27 21:39:28,169 INFO L175 Difference]: Start difference. First operand has 423 places, 535 transitions, 8063 flow. Second operand 9 states and 168 transitions. [2024-06-27 21:39:28,169 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 431 places, 579 transitions, 10347 flow [2024-06-27 21:39:33,059 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 425 places, 579 transitions, 10097 flow, removed 9 selfloop flow, removed 6 redundant places. [2024-06-27 21:39:33,066 INFO L231 Difference]: Finished difference. Result has 426 places, 541 transitions, 8531 flow [2024-06-27 21:39:33,066 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=7813, PETRI_DIFFERENCE_MINUEND_PLACES=417, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=535, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=276, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=259, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8531, PETRI_PLACES=426, PETRI_TRANSITIONS=541} [2024-06-27 21:39:33,066 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 382 predicate places. [2024-06-27 21:39:33,066 INFO L495 AbstractCegarLoop]: Abstraction has has 426 places, 541 transitions, 8531 flow [2024-06-27 21:39:33,067 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:39:33,067 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:39:33,067 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:39:33,067 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable139 [2024-06-27 21:39:33,067 INFO L420 AbstractCegarLoop]: === Iteration 141 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:39:33,067 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:39:33,067 INFO L85 PathProgramCache]: Analyzing trace with hash -498854375, now seen corresponding path program 4 times [2024-06-27 21:39:33,068 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:39:33,068 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2142943132] [2024-06-27 21:39:33,068 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:39:33,068 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:39:33,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:39:36,097 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:39:36,097 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:39:36,097 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2142943132] [2024-06-27 21:39:36,097 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2142943132] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:39:36,098 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:39:36,098 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:39:36,098 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1689214369] [2024-06-27 21:39:36,098 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:39:36,098 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:39:36,098 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:39:36,098 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:39:36,099 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:39:36,139 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-27 21:39:36,139 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 426 places, 541 transitions, 8531 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:39:36,139 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:39:36,139 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-27 21:39:36,139 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:39:38,700 INFO L124 PetriNetUnfolderBase]: 4221/6658 cut-off events. [2024-06-27 21:39:38,701 INFO L125 PetriNetUnfolderBase]: For 1324427/1324429 co-relation queries the response was YES. [2024-06-27 21:39:38,780 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54102 conditions, 6658 events. 4221/6658 cut-off events. For 1324427/1324429 co-relation queries the response was YES. Maximal size of possible extension queue 458. Compared 40974 event pairs, 791 based on Foata normal form. 4/6662 useless extension candidates. Maximal degree in co-relation 53912. Up to 4373 conditions per place. [2024-06-27 21:39:38,808 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 294 selfloop transitions, 280 changer transitions 0/579 dead transitions. [2024-06-27 21:39:38,808 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 434 places, 579 transitions, 10395 flow [2024-06-27 21:39:38,809 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 21:39:38,809 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 21:39:38,809 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 169 transitions. [2024-06-27 21:39:38,809 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43669250645994834 [2024-06-27 21:39:38,809 INFO L175 Difference]: Start difference. First operand has 426 places, 541 transitions, 8531 flow. Second operand 9 states and 169 transitions. [2024-06-27 21:39:38,809 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 434 places, 579 transitions, 10395 flow [2024-06-27 21:39:43,763 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 429 places, 579 transitions, 9801 flow, removed 56 selfloop flow, removed 5 redundant places. [2024-06-27 21:39:43,770 INFO L231 Difference]: Finished difference. Result has 430 places, 541 transitions, 8503 flow [2024-06-27 21:39:43,770 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=7937, PETRI_DIFFERENCE_MINUEND_PLACES=421, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=541, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=280, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=261, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8503, PETRI_PLACES=430, PETRI_TRANSITIONS=541} [2024-06-27 21:39:43,771 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 386 predicate places. [2024-06-27 21:39:43,771 INFO L495 AbstractCegarLoop]: Abstraction has has 430 places, 541 transitions, 8503 flow [2024-06-27 21:39:43,771 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:39:43,771 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:39:43,771 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:39:43,771 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable140 [2024-06-27 21:39:43,771 INFO L420 AbstractCegarLoop]: === Iteration 142 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:39:43,772 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:39:43,772 INFO L85 PathProgramCache]: Analyzing trace with hash -2074155495, now seen corresponding path program 5 times [2024-06-27 21:39:43,772 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:39:43,772 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1097017373] [2024-06-27 21:39:43,772 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:39:43,772 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:39:43,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:39:46,745 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:39:46,746 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:39:46,746 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1097017373] [2024-06-27 21:39:46,746 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1097017373] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:39:46,746 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:39:46,746 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:39:46,746 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2114061353] [2024-06-27 21:39:46,746 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:39:46,747 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:39:46,747 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:39:46,747 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:39:46,747 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:39:46,792 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-27 21:39:46,793 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 430 places, 541 transitions, 8503 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:39:46,793 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:39:46,793 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-27 21:39:46,793 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:39:49,424 INFO L124 PetriNetUnfolderBase]: 4279/6755 cut-off events. [2024-06-27 21:39:49,424 INFO L125 PetriNetUnfolderBase]: For 1401959/1401959 co-relation queries the response was YES. [2024-06-27 21:39:49,709 INFO L83 FinitePrefix]: Finished finitePrefix Result has 55690 conditions, 6755 events. 4279/6755 cut-off events. For 1401959/1401959 co-relation queries the response was YES. Maximal size of possible extension queue 467. Compared 41787 event pairs, 925 based on Foata normal form. 2/6757 useless extension candidates. Maximal degree in co-relation 55499. Up to 6103 conditions per place. [2024-06-27 21:39:49,733 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 493 selfloop transitions, 86 changer transitions 0/584 dead transitions. [2024-06-27 21:39:49,734 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 439 places, 584 transitions, 10532 flow [2024-06-27 21:39:49,734 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 21:39:49,734 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 21:39:49,735 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 174 transitions. [2024-06-27 21:39:49,735 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4046511627906977 [2024-06-27 21:39:49,735 INFO L175 Difference]: Start difference. First operand has 430 places, 541 transitions, 8503 flow. Second operand 10 states and 174 transitions. [2024-06-27 21:39:49,735 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 439 places, 584 transitions, 10532 flow [2024-06-27 21:39:53,836 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 431 places, 584 transitions, 9938 flow, removed 2 selfloop flow, removed 8 redundant places. [2024-06-27 21:39:53,843 INFO L231 Difference]: Finished difference. Result has 433 places, 550 transitions, 8351 flow [2024-06-27 21:39:53,843 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=7927, PETRI_DIFFERENCE_MINUEND_PLACES=422, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=541, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=80, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=458, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=8351, PETRI_PLACES=433, PETRI_TRANSITIONS=550} [2024-06-27 21:39:53,843 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 389 predicate places. [2024-06-27 21:39:53,843 INFO L495 AbstractCegarLoop]: Abstraction has has 433 places, 550 transitions, 8351 flow [2024-06-27 21:39:53,844 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:39:53,844 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:39:53,844 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:39:53,844 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable141 [2024-06-27 21:39:53,844 INFO L420 AbstractCegarLoop]: === Iteration 143 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:39:53,845 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:39:53,845 INFO L85 PathProgramCache]: Analyzing trace with hash -2073948291, now seen corresponding path program 9 times [2024-06-27 21:39:53,845 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:39:53,845 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [672490926] [2024-06-27 21:39:53,845 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:39:53,845 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:39:53,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:39:56,739 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:39:56,740 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:39:56,740 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [672490926] [2024-06-27 21:39:56,740 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [672490926] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:39:56,740 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:39:56,740 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:39:56,740 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1388166143] [2024-06-27 21:39:56,740 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:39:56,740 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:39:56,740 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:39:56,740 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:39:56,741 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:39:56,752 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-27 21:39:56,752 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 433 places, 550 transitions, 8351 flow. Second operand has 9 states, 9 states have (on average 10.0) internal successors, (90), 9 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:39:56,752 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:39:56,752 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-27 21:39:56,752 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:39:59,263 INFO L124 PetriNetUnfolderBase]: 4273/6731 cut-off events. [2024-06-27 21:39:59,263 INFO L125 PetriNetUnfolderBase]: For 1397328/1397328 co-relation queries the response was YES. [2024-06-27 21:39:59,337 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54757 conditions, 6731 events. 4273/6731 cut-off events. For 1397328/1397328 co-relation queries the response was YES. Maximal size of possible extension queue 467. Compared 41597 event pairs, 993 based on Foata normal form. 2/6733 useless extension candidates. Maximal degree in co-relation 54564. Up to 6341 conditions per place. [2024-06-27 21:39:59,360 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 525 selfloop transitions, 46 changer transitions 0/576 dead transitions. [2024-06-27 21:39:59,361 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 441 places, 576 transitions, 9847 flow [2024-06-27 21:39:59,361 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 21:39:59,361 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 21:39:59,362 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 149 transitions. [2024-06-27 21:39:59,362 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3850129198966408 [2024-06-27 21:39:59,362 INFO L175 Difference]: Start difference. First operand has 433 places, 550 transitions, 8351 flow. Second operand 9 states and 149 transitions. [2024-06-27 21:39:59,362 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 441 places, 576 transitions, 9847 flow [2024-06-27 21:40:04,397 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 436 places, 576 transitions, 9707 flow, removed 35 selfloop flow, removed 5 redundant places. [2024-06-27 21:40:04,403 INFO L231 Difference]: Finished difference. Result has 437 places, 550 transitions, 8309 flow [2024-06-27 21:40:04,404 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=8211, PETRI_DIFFERENCE_MINUEND_PLACES=428, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=550, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=504, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8309, PETRI_PLACES=437, PETRI_TRANSITIONS=550} [2024-06-27 21:40:04,404 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 393 predicate places. [2024-06-27 21:40:04,404 INFO L495 AbstractCegarLoop]: Abstraction has has 437 places, 550 transitions, 8309 flow [2024-06-27 21:40:04,404 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.0) internal successors, (90), 9 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:40:04,404 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:40:04,405 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:40:04,405 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable142 [2024-06-27 21:40:04,405 INFO L420 AbstractCegarLoop]: === Iteration 144 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:40:04,405 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:40:04,405 INFO L85 PathProgramCache]: Analyzing trace with hash 2034702973, now seen corresponding path program 10 times [2024-06-27 21:40:04,405 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:40:04,405 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1238580687] [2024-06-27 21:40:04,406 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:40:04,406 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:40:04,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:40:07,441 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:40:07,441 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:40:07,441 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1238580687] [2024-06-27 21:40:07,441 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1238580687] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:40:07,442 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:40:07,442 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:40:07,442 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [800471758] [2024-06-27 21:40:07,442 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:40:07,442 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:40:07,442 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:40:07,443 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:40:07,443 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:40:07,469 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-27 21:40:07,469 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 437 places, 550 transitions, 8309 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:40:07,469 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:40:07,470 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-27 21:40:07,470 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:40:10,142 INFO L124 PetriNetUnfolderBase]: 4267/6723 cut-off events. [2024-06-27 21:40:10,143 INFO L125 PetriNetUnfolderBase]: For 1393836/1393836 co-relation queries the response was YES. [2024-06-27 21:40:10,217 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54497 conditions, 6723 events. 4267/6723 cut-off events. For 1393836/1393836 co-relation queries the response was YES. Maximal size of possible extension queue 467. Compared 41541 event pairs, 992 based on Foata normal form. 2/6725 useless extension candidates. Maximal degree in co-relation 54302. Up to 6336 conditions per place. [2024-06-27 21:40:10,240 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 525 selfloop transitions, 46 changer transitions 0/576 dead transitions. [2024-06-27 21:40:10,241 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 446 places, 576 transitions, 9523 flow [2024-06-27 21:40:10,241 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 21:40:10,241 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 21:40:10,242 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 160 transitions. [2024-06-27 21:40:10,242 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37209302325581395 [2024-06-27 21:40:10,242 INFO L175 Difference]: Start difference. First operand has 437 places, 550 transitions, 8309 flow. Second operand 10 states and 160 transitions. [2024-06-27 21:40:10,242 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 446 places, 576 transitions, 9523 flow [2024-06-27 21:40:15,481 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 439 places, 576 transitions, 9429 flow, removed 2 selfloop flow, removed 7 redundant places. [2024-06-27 21:40:15,487 INFO L231 Difference]: Finished difference. Result has 440 places, 550 transitions, 8313 flow [2024-06-27 21:40:15,488 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=8215, PETRI_DIFFERENCE_MINUEND_PLACES=430, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=550, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=504, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=8313, PETRI_PLACES=440, PETRI_TRANSITIONS=550} [2024-06-27 21:40:15,491 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 396 predicate places. [2024-06-27 21:40:15,491 INFO L495 AbstractCegarLoop]: Abstraction has has 440 places, 550 transitions, 8313 flow [2024-06-27 21:40:15,491 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:40:15,492 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:40:15,492 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:40:15,492 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable143 [2024-06-27 21:40:15,508 INFO L420 AbstractCegarLoop]: === Iteration 145 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:40:15,508 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:40:15,508 INFO L85 PathProgramCache]: Analyzing trace with hash 1028305915, now seen corresponding path program 6 times [2024-06-27 21:40:15,508 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:40:15,509 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1327549975] [2024-06-27 21:40:15,509 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:40:15,509 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:40:15,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:40:18,405 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:40:18,405 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:40:18,405 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1327549975] [2024-06-27 21:40:18,406 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1327549975] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:40:18,406 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:40:18,406 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:40:18,406 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1181692112] [2024-06-27 21:40:18,406 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:40:18,406 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:40:18,406 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:40:18,407 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:40:18,407 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:40:18,448 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-27 21:40:18,448 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 440 places, 550 transitions, 8313 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:40:18,448 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:40:18,448 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-27 21:40:18,448 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:40:20,848 INFO L124 PetriNetUnfolderBase]: 4277/6735 cut-off events. [2024-06-27 21:40:20,849 INFO L125 PetriNetUnfolderBase]: For 1407891/1407891 co-relation queries the response was YES. [2024-06-27 21:40:20,927 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54798 conditions, 6735 events. 4277/6735 cut-off events. For 1407891/1407891 co-relation queries the response was YES. Maximal size of possible extension queue 471. Compared 41606 event pairs, 923 based on Foata normal form. 2/6737 useless extension candidates. Maximal degree in co-relation 54602. Up to 6103 conditions per place. [2024-06-27 21:40:20,951 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 493 selfloop transitions, 89 changer transitions 0/587 dead transitions. [2024-06-27 21:40:20,951 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 449 places, 587 transitions, 10219 flow [2024-06-27 21:40:20,952 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 21:40:20,952 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 21:40:20,952 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 174 transitions. [2024-06-27 21:40:20,952 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4046511627906977 [2024-06-27 21:40:20,953 INFO L175 Difference]: Start difference. First operand has 440 places, 550 transitions, 8313 flow. Second operand 10 states and 174 transitions. [2024-06-27 21:40:20,953 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 449 places, 587 transitions, 10219 flow [2024-06-27 21:40:26,156 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 440 places, 587 transitions, 10119 flow, removed 0 selfloop flow, removed 9 redundant places. [2024-06-27 21:40:26,162 INFO L231 Difference]: Finished difference. Result has 441 places, 553 transitions, 8479 flow [2024-06-27 21:40:26,163 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=8213, PETRI_DIFFERENCE_MINUEND_PLACES=431, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=550, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=86, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=464, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=8479, PETRI_PLACES=441, PETRI_TRANSITIONS=553} [2024-06-27 21:40:26,163 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 397 predicate places. [2024-06-27 21:40:26,163 INFO L495 AbstractCegarLoop]: Abstraction has has 441 places, 553 transitions, 8479 flow [2024-06-27 21:40:26,163 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:40:26,163 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:40:26,163 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:40:26,163 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable144 [2024-06-27 21:40:26,164 INFO L420 AbstractCegarLoop]: === Iteration 146 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:40:26,164 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:40:26,164 INFO L85 PathProgramCache]: Analyzing trace with hash 1256207065, now seen corresponding path program 7 times [2024-06-27 21:40:26,164 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:40:26,164 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [688180045] [2024-06-27 21:40:26,164 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:40:26,164 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:40:26,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:40:28,999 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:40:29,000 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:40:29,000 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [688180045] [2024-06-27 21:40:29,000 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [688180045] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:40:29,000 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:40:29,000 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:40:29,000 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [622440856] [2024-06-27 21:40:29,000 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:40:29,001 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:40:29,001 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:40:29,001 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:40:29,001 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:40:29,027 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-27 21:40:29,027 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 441 places, 553 transitions, 8479 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:40:29,027 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:40:29,027 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-27 21:40:29,028 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:40:31,571 INFO L124 PetriNetUnfolderBase]: 4271/6727 cut-off events. [2024-06-27 21:40:31,572 INFO L125 PetriNetUnfolderBase]: For 1412826/1412826 co-relation queries the response was YES. [2024-06-27 21:40:31,649 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54737 conditions, 6727 events. 4271/6727 cut-off events. For 1412826/1412826 co-relation queries the response was YES. Maximal size of possible extension queue 471. Compared 41485 event pairs, 913 based on Foata normal form. 2/6729 useless extension candidates. Maximal degree in co-relation 54540. Up to 6100 conditions per place. [2024-06-27 21:40:31,674 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 493 selfloop transitions, 89 changer transitions 0/587 dead transitions. [2024-06-27 21:40:31,674 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 451 places, 587 transitions, 10019 flow [2024-06-27 21:40:31,675 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-27 21:40:31,675 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-27 21:40:31,675 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 185 transitions. [2024-06-27 21:40:31,675 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39112050739957716 [2024-06-27 21:40:31,675 INFO L175 Difference]: Start difference. First operand has 441 places, 553 transitions, 8479 flow. Second operand 11 states and 185 transitions. [2024-06-27 21:40:31,675 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 451 places, 587 transitions, 10019 flow [2024-06-27 21:40:35,979 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 444 places, 587 transitions, 9759 flow, removed 54 selfloop flow, removed 7 redundant places. [2024-06-27 21:40:35,986 INFO L231 Difference]: Finished difference. Result has 445 places, 553 transitions, 8403 flow [2024-06-27 21:40:35,986 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=8219, PETRI_DIFFERENCE_MINUEND_PLACES=434, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=553, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=89, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=464, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=8403, PETRI_PLACES=445, PETRI_TRANSITIONS=553} [2024-06-27 21:40:35,986 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 401 predicate places. [2024-06-27 21:40:35,986 INFO L495 AbstractCegarLoop]: Abstraction has has 445 places, 553 transitions, 8403 flow [2024-06-27 21:40:35,987 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:40:35,987 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:40:35,987 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:40:35,987 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable145 [2024-06-27 21:40:35,987 INFO L420 AbstractCegarLoop]: === Iteration 147 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:40:35,987 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:40:35,987 INFO L85 PathProgramCache]: Analyzing trace with hash -1809679201, now seen corresponding path program 1 times [2024-06-27 21:40:35,987 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:40:35,988 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1813084462] [2024-06-27 21:40:35,988 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:40:35,988 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:40:36,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:40:39,046 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:40:39,046 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:40:39,047 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1813084462] [2024-06-27 21:40:39,047 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1813084462] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:40:39,047 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:40:39,047 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:40:39,047 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1351176439] [2024-06-27 21:40:39,047 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:40:39,047 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:40:39,047 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:40:39,048 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:40:39,048 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:40:39,065 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-27 21:40:39,065 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 445 places, 553 transitions, 8403 flow. Second operand has 10 states, 10 states have (on average 9.9) internal successors, (99), 10 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:40:39,065 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:40:39,065 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-27 21:40:39,066 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:40:41,371 INFO L124 PetriNetUnfolderBase]: 4292/6766 cut-off events. [2024-06-27 21:40:41,372 INFO L125 PetriNetUnfolderBase]: For 1450313/1450319 co-relation queries the response was YES. [2024-06-27 21:40:41,451 INFO L83 FinitePrefix]: Finished finitePrefix Result has 55146 conditions, 6766 events. 4292/6766 cut-off events. For 1450313/1450319 co-relation queries the response was YES. Maximal size of possible extension queue 476. Compared 41817 event pairs, 848 based on Foata normal form. 8/6774 useless extension candidates. Maximal degree in co-relation 54948. Up to 6084 conditions per place. [2024-06-27 21:40:41,477 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 488 selfloop transitions, 99 changer transitions 0/592 dead transitions. [2024-06-27 21:40:41,477 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 452 places, 592 transitions, 10011 flow [2024-06-27 21:40:41,478 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 21:40:41,478 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 21:40:41,478 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 148 transitions. [2024-06-27 21:40:41,478 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43023255813953487 [2024-06-27 21:40:41,478 INFO L175 Difference]: Start difference. First operand has 445 places, 553 transitions, 8403 flow. Second operand 8 states and 148 transitions. [2024-06-27 21:40:41,478 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 452 places, 592 transitions, 10011 flow Killed by 15