./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/pthread-wmm/thin002_power.opt.i --full-output --witness-type correctness_witness --witnessparser.only.consider.loop.invariants false --cacsl2boogietranslator.check.unreachability.of.reach_error.function false --validate ./goblint.2024-05-21_14-57-05.files/protection/thin002_power.opt.yml/witness.yml --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 76401ed0 Calling Ultimate with: /root/.sdkman/candidates/java/current/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReachWitnessValidation.xml -i ../../../trunk/examples/svcomp/pthread-wmm/thin002_power.opt.i ./goblint.2024-05-21_14-57-05.files/protection/thin002_power.opt.yml/witness.yml -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --traceabstraction.compute.hoare.annotation.of.negated.interpolant.automaton,.abstraction.and.cfg false --witnessparser.only.consider.loop.invariants false --cacsl2boogietranslator.check.unreachability.of.reach_error.function false --- Real Ultimate output --- This is Ultimate 0.2.4-tmp.fs.goblint-validation-76401ed-m [2024-06-20 17:31:20,255 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-06-20 17:31:20,330 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-06-20 17:31:20,341 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-06-20 17:31:20,342 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-06-20 17:31:20,369 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-06-20 17:31:20,371 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-06-20 17:31:20,372 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-06-20 17:31:20,373 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-06-20 17:31:20,376 INFO L153 SettingsManager]: * Use memory slicer=true [2024-06-20 17:31:20,377 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-06-20 17:31:20,377 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-06-20 17:31:20,378 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-06-20 17:31:20,379 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-06-20 17:31:20,379 INFO L153 SettingsManager]: * Use SBE=true [2024-06-20 17:31:20,380 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-06-20 17:31:20,380 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-06-20 17:31:20,380 INFO L153 SettingsManager]: * sizeof long=4 [2024-06-20 17:31:20,381 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-06-20 17:31:20,381 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-06-20 17:31:20,381 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-06-20 17:31:20,381 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-06-20 17:31:20,382 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-06-20 17:31:20,382 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-06-20 17:31:20,382 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-06-20 17:31:20,383 INFO L153 SettingsManager]: * sizeof long double=12 [2024-06-20 17:31:20,383 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-06-20 17:31:20,383 INFO L153 SettingsManager]: * Use constant arrays=true [2024-06-20 17:31:20,384 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-06-20 17:31:20,385 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-06-20 17:31:20,386 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-06-20 17:31:20,386 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-06-20 17:31:20,386 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-20 17:31:20,387 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-06-20 17:31:20,387 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-06-20 17:31:20,387 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-06-20 17:31:20,387 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-06-20 17:31:20,387 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-06-20 17:31:20,388 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-06-20 17:31:20,388 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-06-20 17:31:20,388 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-06-20 17:31:20,388 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-06-20 17:31:20,389 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-06-20 17:31:20,389 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check unreachability of reach_error function -> false [2024-06-20 17:31:20,633 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-06-20 17:31:20,655 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-06-20 17:31:20,657 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-06-20 17:31:20,658 INFO L270 PluginConnector]: Initializing CDTParser... [2024-06-20 17:31:20,659 INFO L274 PluginConnector]: CDTParser initialized [2024-06-20 17:31:20,660 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-wmm/thin002_power.opt.i [2024-06-20 17:31:21,896 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-06-20 17:31:22,116 INFO L384 CDTParser]: Found 1 translation units. [2024-06-20 17:31:22,117 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/thin002_power.opt.i [2024-06-20 17:31:22,132 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/da961e16c/0ed9c044dab044b78201b070033c6eca/FLAG150c79f16 [2024-06-20 17:31:22,144 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/da961e16c/0ed9c044dab044b78201b070033c6eca [2024-06-20 17:31:22,146 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-06-20 17:31:22,147 INFO L274 PluginConnector]: Witness Parser initialized [2024-06-20 17:31:22,147 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/./goblint.2024-05-21_14-57-05.files/protection/thin002_power.opt.yml/witness.yml [2024-06-20 17:31:22,448 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-06-20 17:31:22,450 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-06-20 17:31:22,452 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-06-20 17:31:22,452 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-06-20 17:31:22,457 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-06-20 17:31:22,459 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.06 05:31:22" (1/2) ... [2024-06-20 17:31:22,460 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@71625d17 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.06 05:31:22, skipping insertion in model container [2024-06-20 17:31:22,460 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.06 05:31:22" (1/2) ... [2024-06-20 17:31:22,462 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@51e2d374 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.06 05:31:22, skipping insertion in model container [2024-06-20 17:31:22,462 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 20.06 05:31:22" (2/2) ... [2024-06-20 17:31:22,462 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@71625d17 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 20.06 05:31:22, skipping insertion in model container [2024-06-20 17:31:22,463 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 20.06 05:31:22" (2/2) ... [2024-06-20 17:31:22,463 INFO L83 nessWitnessExtractor]: Extracting all invariants from correctness witness [2024-06-20 17:31:22,632 INFO L95 edCorrectnessWitness]: Found the following entries in the witness: [2024-06-20 17:31:22,633 INFO L97 edCorrectnessWitness]: Location invariant before [L883-L883] (((((((((((((((((((((((((((((((((((((((! multithreaded || ((0 <= a && a <= 1) && (a == 0 || a == 1))) && (! multithreaded || __unbuffered_p3_EAX$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || ((0 <= x && x <= 1) && (x == 0 || x == 1)))) && (! multithreaded || __unbuffered_p3_EAX$mem_tmp == 0)) && (! multithreaded || z$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || __unbuffered_p3_EAX$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || ((0 <= z$mem_tmp && z$mem_tmp <= 1) && (z$mem_tmp == 0 || z$mem_tmp == 1)))) && (! multithreaded || __unbuffered_p3_EAX$flush_delayed == (_Bool)0)) && (! multithreaded || __unbuffered_p3_EAX$w_buff1 == 0)) && (! multithreaded || ((0 <= y && y <= 1) && (y == 0 || y == 1)))) && (! multithreaded || ((0 <= __unbuffered_p3_EAX && __unbuffered_p3_EAX <= 1) && (__unbuffered_p3_EAX == 0 || __unbuffered_p3_EAX == 1)))) && (! multithreaded || __unbuffered_p3_EAX$w_buff1_used == (_Bool)0)) && (! multithreaded || __unbuffered_p3_EAX$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || z$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || __unbuffered_p3_EAX$w_buff0 == 0)) && (! multithreaded || z$read_delayed == (_Bool)0)) && (! multithreaded || __unbuffered_p3_EAX$w_buff0_used == (_Bool)0)) && (! multithreaded || __unbuffered_p3_EAX$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || ((0 <= z && z <= 1) && (z == 0 || z == 1)))) && (! multithreaded || __unbuffered_p3_EAX$r_buff1_thd4 == (_Bool)0)) && (! multithreaded || z$r_buff0_thd4 == (_Bool)0)) && (! multithreaded || (__unbuffered_p3_EAX$read_delayed_var == 0 || (((0 <= *__unbuffered_p3_EAX$read_delayed_var && *__unbuffered_p3_EAX$read_delayed_var <= 1) && __unbuffered_p3_EAX$read_delayed_var == & z) && (*__unbuffered_p3_EAX$read_delayed_var == 0 || *__unbuffered_p3_EAX$read_delayed_var == 1))))) && (! multithreaded || ((0 <= __unbuffered_p1_EAX && __unbuffered_p1_EAX <= 1) && (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1)))) && (! multithreaded || z$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || __unbuffered_p3_EAX$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || __unbuffered_p3_EAX$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p0_EAX && __unbuffered_p0_EAX <= 1) && (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1)))) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || __unbuffered_p3_EAX$r_buff0_thd4 == (_Bool)0)) && (! multithreaded || ((0 <= z$w_buff1 && z$w_buff1 <= 1) && (z$w_buff1 == 0 || z$w_buff1 == 1)))) && (! multithreaded || z$flush_delayed == (_Bool)0)) && (! multithreaded || z$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || z$r_buff1_thd4 == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p2_EAX && __unbuffered_p2_EAX <= 1) && (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1)))) && (! multithreaded || z$read_delayed_var == 0)) && (! multithreaded || __unbuffered_p3_EAX$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || z$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || __unbuffered_p3_EAX$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || z$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || ((0 <= z$w_buff0 && z$w_buff0 <= 1) && (z$w_buff0 == 0 || z$w_buff0 == 1))) [2024-06-20 17:31:22,633 INFO L97 edCorrectnessWitness]: Location invariant before [L882-L882] (((((((((((((((((((((((((((((((((((((((! multithreaded || ((0 <= a && a <= 1) && (a == 0 || a == 1))) && (! multithreaded || __unbuffered_p3_EAX$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || ((0 <= x && x <= 1) && (x == 0 || x == 1)))) && (! multithreaded || __unbuffered_p3_EAX$mem_tmp == 0)) && (! multithreaded || z$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || __unbuffered_p3_EAX$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || ((0 <= z$mem_tmp && z$mem_tmp <= 1) && (z$mem_tmp == 0 || z$mem_tmp == 1)))) && (! multithreaded || __unbuffered_p3_EAX$flush_delayed == (_Bool)0)) && (! multithreaded || __unbuffered_p3_EAX$w_buff1 == 0)) && (! multithreaded || ((0 <= y && y <= 1) && (y == 0 || y == 1)))) && (! multithreaded || ((0 <= __unbuffered_p3_EAX && __unbuffered_p3_EAX <= 1) && (__unbuffered_p3_EAX == 0 || __unbuffered_p3_EAX == 1)))) && (! multithreaded || __unbuffered_p3_EAX$w_buff1_used == (_Bool)0)) && (! multithreaded || __unbuffered_p3_EAX$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || z$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || __unbuffered_p3_EAX$w_buff0 == 0)) && (! multithreaded || z$read_delayed == (_Bool)0)) && (! multithreaded || __unbuffered_p3_EAX$w_buff0_used == (_Bool)0)) && (! multithreaded || __unbuffered_p3_EAX$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || ((0 <= z && z <= 1) && (z == 0 || z == 1)))) && (! multithreaded || __unbuffered_p3_EAX$r_buff1_thd4 == (_Bool)0)) && (! multithreaded || z$r_buff0_thd4 == (_Bool)0)) && (! multithreaded || (__unbuffered_p3_EAX$read_delayed_var == 0 || (((0 <= *__unbuffered_p3_EAX$read_delayed_var && *__unbuffered_p3_EAX$read_delayed_var <= 1) && __unbuffered_p3_EAX$read_delayed_var == & z) && (*__unbuffered_p3_EAX$read_delayed_var == 0 || *__unbuffered_p3_EAX$read_delayed_var == 1))))) && (! multithreaded || ((0 <= __unbuffered_p1_EAX && __unbuffered_p1_EAX <= 1) && (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1)))) && (! multithreaded || z$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || __unbuffered_p3_EAX$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || __unbuffered_p3_EAX$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p0_EAX && __unbuffered_p0_EAX <= 1) && (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1)))) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || __unbuffered_p3_EAX$r_buff0_thd4 == (_Bool)0)) && (! multithreaded || ((0 <= z$w_buff1 && z$w_buff1 <= 1) && (z$w_buff1 == 0 || z$w_buff1 == 1)))) && (! multithreaded || z$flush_delayed == (_Bool)0)) && (! multithreaded || z$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || z$r_buff1_thd4 == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p2_EAX && __unbuffered_p2_EAX <= 1) && (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1)))) && (! multithreaded || z$read_delayed_var == 0)) && (! multithreaded || __unbuffered_p3_EAX$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || z$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || __unbuffered_p3_EAX$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || z$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || ((0 <= z$w_buff0 && z$w_buff0 <= 1) && (z$w_buff0 == 0 || z$w_buff0 == 1))) [2024-06-20 17:31:22,633 INFO L97 edCorrectnessWitness]: Location invariant before [L878-L878] (((((((((((((((((((((((((((((((((((((((! multithreaded || ((0 <= a && a <= 1) && (a == 0 || a == 1))) && (! multithreaded || __unbuffered_p3_EAX$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || ((0 <= x && x <= 1) && (x == 0 || x == 1)))) && (! multithreaded || __unbuffered_p3_EAX$mem_tmp == 0)) && (! multithreaded || z$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || __unbuffered_p3_EAX$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || ((0 <= z$mem_tmp && z$mem_tmp <= 1) && (z$mem_tmp == 0 || z$mem_tmp == 1)))) && (! multithreaded || __unbuffered_p3_EAX$flush_delayed == (_Bool)0)) && (! multithreaded || __unbuffered_p3_EAX$w_buff1 == 0)) && (! multithreaded || ((0 <= y && y <= 1) && (y == 0 || y == 1)))) && (! multithreaded || ((0 <= __unbuffered_p3_EAX && __unbuffered_p3_EAX <= 1) && (__unbuffered_p3_EAX == 0 || __unbuffered_p3_EAX == 1)))) && (! multithreaded || __unbuffered_p3_EAX$w_buff1_used == (_Bool)0)) && (! multithreaded || __unbuffered_p3_EAX$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || z$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || __unbuffered_p3_EAX$w_buff0 == 0)) && (! multithreaded || z$read_delayed == (_Bool)0)) && (! multithreaded || __unbuffered_p3_EAX$w_buff0_used == (_Bool)0)) && (! multithreaded || __unbuffered_p3_EAX$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || ((0 <= z && z <= 1) && (z == 0 || z == 1)))) && (! multithreaded || __unbuffered_p3_EAX$r_buff1_thd4 == (_Bool)0)) && (! multithreaded || z$r_buff0_thd4 == (_Bool)0)) && (! multithreaded || (__unbuffered_p3_EAX$read_delayed_var == 0 || (((0 <= *__unbuffered_p3_EAX$read_delayed_var && *__unbuffered_p3_EAX$read_delayed_var <= 1) && __unbuffered_p3_EAX$read_delayed_var == & z) && (*__unbuffered_p3_EAX$read_delayed_var == 0 || *__unbuffered_p3_EAX$read_delayed_var == 1))))) && (! multithreaded || ((0 <= __unbuffered_p1_EAX && __unbuffered_p1_EAX <= 1) && (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1)))) && (! multithreaded || z$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || __unbuffered_p3_EAX$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || __unbuffered_p3_EAX$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p0_EAX && __unbuffered_p0_EAX <= 1) && (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1)))) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || __unbuffered_p3_EAX$r_buff0_thd4 == (_Bool)0)) && (! multithreaded || ((0 <= z$w_buff1 && z$w_buff1 <= 1) && (z$w_buff1 == 0 || z$w_buff1 == 1)))) && (! multithreaded || z$flush_delayed == (_Bool)0)) && (! multithreaded || z$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || z$r_buff1_thd4 == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p2_EAX && __unbuffered_p2_EAX <= 1) && (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1)))) && (! multithreaded || z$read_delayed_var == 0)) && (! multithreaded || __unbuffered_p3_EAX$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || z$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || __unbuffered_p3_EAX$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || z$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || ((0 <= z$w_buff0 && z$w_buff0 <= 1) && (z$w_buff0 == 0 || z$w_buff0 == 1))) [2024-06-20 17:31:22,640 INFO L97 edCorrectnessWitness]: Location invariant before [L880-L880] (((((((((((((((((((((((((((((((((((((((! multithreaded || ((0 <= a && a <= 1) && (a == 0 || a == 1))) && (! multithreaded || __unbuffered_p3_EAX$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || ((0 <= x && x <= 1) && (x == 0 || x == 1)))) && (! multithreaded || __unbuffered_p3_EAX$mem_tmp == 0)) && (! multithreaded || z$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || __unbuffered_p3_EAX$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || ((0 <= z$mem_tmp && z$mem_tmp <= 1) && (z$mem_tmp == 0 || z$mem_tmp == 1)))) && (! multithreaded || __unbuffered_p3_EAX$flush_delayed == (_Bool)0)) && (! multithreaded || __unbuffered_p3_EAX$w_buff1 == 0)) && (! multithreaded || ((0 <= y && y <= 1) && (y == 0 || y == 1)))) && (! multithreaded || ((0 <= __unbuffered_p3_EAX && __unbuffered_p3_EAX <= 1) && (__unbuffered_p3_EAX == 0 || __unbuffered_p3_EAX == 1)))) && (! multithreaded || __unbuffered_p3_EAX$w_buff1_used == (_Bool)0)) && (! multithreaded || __unbuffered_p3_EAX$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || z$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || __unbuffered_p3_EAX$w_buff0 == 0)) && (! multithreaded || z$read_delayed == (_Bool)0)) && (! multithreaded || __unbuffered_p3_EAX$w_buff0_used == (_Bool)0)) && (! multithreaded || __unbuffered_p3_EAX$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || ((0 <= z && z <= 1) && (z == 0 || z == 1)))) && (! multithreaded || __unbuffered_p3_EAX$r_buff1_thd4 == (_Bool)0)) && (! multithreaded || z$r_buff0_thd4 == (_Bool)0)) && (! multithreaded || (__unbuffered_p3_EAX$read_delayed_var == 0 || (((0 <= *__unbuffered_p3_EAX$read_delayed_var && *__unbuffered_p3_EAX$read_delayed_var <= 1) && __unbuffered_p3_EAX$read_delayed_var == & z) && (*__unbuffered_p3_EAX$read_delayed_var == 0 || *__unbuffered_p3_EAX$read_delayed_var == 1))))) && (! multithreaded || ((0 <= __unbuffered_p1_EAX && __unbuffered_p1_EAX <= 1) && (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1)))) && (! multithreaded || z$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || __unbuffered_p3_EAX$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || __unbuffered_p3_EAX$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p0_EAX && __unbuffered_p0_EAX <= 1) && (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1)))) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || __unbuffered_p3_EAX$r_buff0_thd4 == (_Bool)0)) && (! multithreaded || ((0 <= z$w_buff1 && z$w_buff1 <= 1) && (z$w_buff1 == 0 || z$w_buff1 == 1)))) && (! multithreaded || z$flush_delayed == (_Bool)0)) && (! multithreaded || z$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || z$r_buff1_thd4 == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p2_EAX && __unbuffered_p2_EAX <= 1) && (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1)))) && (! multithreaded || z$read_delayed_var == 0)) && (! multithreaded || __unbuffered_p3_EAX$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || z$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || __unbuffered_p3_EAX$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || z$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || ((0 <= z$w_buff0 && z$w_buff0 <= 1) && (z$w_buff0 == 0 || z$w_buff0 == 1))) [2024-06-20 17:31:22,640 INFO L103 edCorrectnessWitness]: ghost_variable multithreaded = 0 [2024-06-20 17:31:22,641 INFO L106 edCorrectnessWitness]: ghost_update [L876-L876] multithreaded = 1; [2024-06-20 17:31:22,687 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-06-20 17:31:23,141 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-20 17:31:23,152 INFO L202 MainTranslator]: Completed pre-run Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local [2024-06-20 17:31:23,305 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-20 17:31:23,342 INFO L206 MainTranslator]: Completed translation [2024-06-20 17:31:23,342 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 20.06 05:31:23 WrapperNode [2024-06-20 17:31:23,342 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-06-20 17:31:23,343 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-06-20 17:31:23,343 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-06-20 17:31:23,344 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-06-20 17:31:23,350 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 20.06 05:31:23" (1/1) ... [2024-06-20 17:31:23,381 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 20.06 05:31:23" (1/1) ... [2024-06-20 17:31:23,435 INFO L138 Inliner]: procedures = 176, calls = 101, calls flagged for inlining = 6, calls inlined = 7, statements flattened = 295 [2024-06-20 17:31:23,437 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-06-20 17:31:23,437 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-06-20 17:31:23,438 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-06-20 17:31:23,438 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-06-20 17:31:23,447 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 20.06 05:31:23" (1/1) ... [2024-06-20 17:31:23,447 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 20.06 05:31:23" (1/1) ... [2024-06-20 17:31:23,455 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 20.06 05:31:23" (1/1) ... [2024-06-20 17:31:23,495 INFO L175 MemorySlicer]: Split 50 memory accesses to 2 slices as follows [2, 48]. 96 percent of accesses are in the largest equivalence class. The 3 initializations are split as follows [2, 1]. The 5 writes are split as follows [0, 5]. [2024-06-20 17:31:23,495 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 20.06 05:31:23" (1/1) ... [2024-06-20 17:31:23,495 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 20.06 05:31:23" (1/1) ... [2024-06-20 17:31:23,521 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 20.06 05:31:23" (1/1) ... [2024-06-20 17:31:23,524 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 20.06 05:31:23" (1/1) ... [2024-06-20 17:31:23,527 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 20.06 05:31:23" (1/1) ... [2024-06-20 17:31:23,550 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 20.06 05:31:23" (1/1) ... [2024-06-20 17:31:23,570 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-06-20 17:31:23,571 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-06-20 17:31:23,571 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-06-20 17:31:23,571 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-06-20 17:31:23,572 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 20.06 05:31:23" (1/1) ... [2024-06-20 17:31:23,583 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-20 17:31:23,591 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-20 17:31:23,607 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-06-20 17:31:23,632 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-06-20 17:31:23,648 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-06-20 17:31:23,648 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-06-20 17:31:23,648 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-06-20 17:31:23,649 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-06-20 17:31:23,649 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-06-20 17:31:23,649 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-06-20 17:31:23,649 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2024-06-20 17:31:23,650 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2024-06-20 17:31:23,650 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2024-06-20 17:31:23,650 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2024-06-20 17:31:23,650 INFO L130 BoogieDeclarations]: Found specification of procedure P2 [2024-06-20 17:31:23,650 INFO L138 BoogieDeclarations]: Found implementation of procedure P2 [2024-06-20 17:31:23,651 INFO L130 BoogieDeclarations]: Found specification of procedure P3 [2024-06-20 17:31:23,651 INFO L138 BoogieDeclarations]: Found implementation of procedure P3 [2024-06-20 17:31:23,651 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-06-20 17:31:23,652 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-06-20 17:31:23,652 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-06-20 17:31:23,653 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-06-20 17:31:23,653 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-06-20 17:31:23,654 WARN L214 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2024-06-20 17:31:23,827 INFO L244 CfgBuilder]: Building ICFG [2024-06-20 17:31:23,828 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-06-20 17:31:24,388 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-06-20 17:31:24,388 INFO L293 CfgBuilder]: Performing block encoding [2024-06-20 17:31:24,982 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-06-20 17:31:24,983 INFO L320 CfgBuilder]: Removed 0 assume(true) statements. [2024-06-20 17:31:24,983 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.06 05:31:24 BoogieIcfgContainer [2024-06-20 17:31:24,983 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-06-20 17:31:24,986 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-06-20 17:31:24,986 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-06-20 17:31:24,990 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-06-20 17:31:24,990 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.06 05:31:22" (1/4) ... [2024-06-20 17:31:24,990 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6e3ec2ab and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.06 05:31:24, skipping insertion in model container [2024-06-20 17:31:24,991 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 20.06 05:31:22" (2/4) ... [2024-06-20 17:31:24,991 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6e3ec2ab and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 20.06 05:31:24, skipping insertion in model container [2024-06-20 17:31:24,991 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 20.06 05:31:23" (3/4) ... [2024-06-20 17:31:24,991 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6e3ec2ab and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 20.06 05:31:24, skipping insertion in model container [2024-06-20 17:31:24,992 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.06 05:31:24" (4/4) ... [2024-06-20 17:31:24,993 INFO L112 eAbstractionObserver]: Analyzing ICFG thin002_power.opt.i [2024-06-20 17:31:25,010 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-06-20 17:31:25,011 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 4 error locations. [2024-06-20 17:31:25,011 INFO L522 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-06-20 17:31:25,094 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-06-20 17:31:25,129 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 67 places, 54 transitions, 124 flow [2024-06-20 17:31:25,204 INFO L124 PetriNetUnfolderBase]: 0/50 cut-off events. [2024-06-20 17:31:25,204 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-20 17:31:25,206 INFO L83 FinitePrefix]: Finished finitePrefix Result has 63 conditions, 50 events. 0/50 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 74 event pairs, 0 based on Foata normal form. 0/46 useless extension candidates. Maximal degree in co-relation 0. Up to 1 conditions per place. [2024-06-20 17:31:25,206 INFO L82 GeneralOperation]: Start removeDead. Operand has 67 places, 54 transitions, 124 flow [2024-06-20 17:31:25,210 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 57 places, 44 transitions, 100 flow [2024-06-20 17:31:25,268 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-06-20 17:31:25,274 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;@44c73a68, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-06-20 17:31:25,275 INFO L358 AbstractCegarLoop]: Starting to check reachability of 8 error locations. [2024-06-20 17:31:25,280 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-06-20 17:31:25,284 INFO L124 PetriNetUnfolderBase]: 0/5 cut-off events. [2024-06-20 17:31:25,285 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-20 17:31:25,288 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:31:25,289 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2024-06-20 17:31:25,289 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-20 17:31:25,293 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:31:25,296 INFO L85 PathProgramCache]: Analyzing trace with hash 881892629, now seen corresponding path program 1 times [2024-06-20 17:31:25,312 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:31:25,313 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2105516915] [2024-06-20 17:31:25,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:31:25,313 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:31:25,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:31:27,981 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:31:27,982 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:31:27,983 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2105516915] [2024-06-20 17:31:27,983 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2105516915] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:31:27,983 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:31:27,984 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-06-20 17:31:27,985 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1424629508] [2024-06-20 17:31:27,986 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:31:27,994 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-06-20 17:31:27,999 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:31:28,028 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-06-20 17:31:28,029 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-06-20 17:31:28,059 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 54 [2024-06-20 17:31:28,062 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 57 places, 44 transitions, 100 flow. Second operand has 3 states, 3 states have (on average 15.333333333333334) internal successors, (46), 3 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:31:28,062 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:31:28,062 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 54 [2024-06-20 17:31:28,063 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:31:30,187 INFO L124 PetriNetUnfolderBase]: 5078/7078 cut-off events. [2024-06-20 17:31:30,187 INFO L125 PetriNetUnfolderBase]: For 98/98 co-relation queries the response was YES. [2024-06-20 17:31:30,201 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14301 conditions, 7078 events. 5078/7078 cut-off events. For 98/98 co-relation queries the response was YES. Maximal size of possible extension queue 332. Compared 37823 event pairs, 3622 based on Foata normal form. 1/6978 useless extension candidates. Maximal degree in co-relation 14288. Up to 7001 conditions per place. [2024-06-20 17:31:30,236 INFO L140 encePairwiseOnDemand]: 45/54 looper letters, 46 selfloop transitions, 5 changer transitions 0/61 dead transitions. [2024-06-20 17:31:30,237 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 59 places, 61 transitions, 245 flow [2024-06-20 17:31:30,238 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-06-20 17:31:30,240 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-06-20 17:31:30,246 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 97 transitions. [2024-06-20 17:31:30,247 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5987654320987654 [2024-06-20 17:31:30,248 INFO L175 Difference]: Start difference. First operand has 57 places, 44 transitions, 100 flow. Second operand 3 states and 97 transitions. [2024-06-20 17:31:30,249 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 59 places, 61 transitions, 245 flow [2024-06-20 17:31:30,251 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 55 places, 61 transitions, 238 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-06-20 17:31:30,254 INFO L231 Difference]: Finished difference. Result has 56 places, 48 transitions, 135 flow [2024-06-20 17:31:30,256 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=96, PETRI_DIFFERENCE_MINUEND_PLACES=53, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=44, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=135, PETRI_PLACES=56, PETRI_TRANSITIONS=48} [2024-06-20 17:31:30,259 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, -1 predicate places. [2024-06-20 17:31:30,259 INFO L495 AbstractCegarLoop]: Abstraction has has 56 places, 48 transitions, 135 flow [2024-06-20 17:31:30,259 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 15.333333333333334) internal successors, (46), 3 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:31:30,259 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:31:30,259 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:31:30,260 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-06-20 17:31:30,260 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-20 17:31:30,261 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:31:30,261 INFO L85 PathProgramCache]: Analyzing trace with hash 162609416, now seen corresponding path program 1 times [2024-06-20 17:31:30,261 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:31:30,261 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1893657716] [2024-06-20 17:31:30,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:31:30,262 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:31:30,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:31:32,897 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:31:32,898 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:31:32,898 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1893657716] [2024-06-20 17:31:32,898 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1893657716] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:31:32,898 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:31:32,898 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-20 17:31:32,899 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1727905238] [2024-06-20 17:31:32,899 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:31:32,900 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-20 17:31:32,900 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:31:32,901 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-20 17:31:32,901 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-20 17:31:32,951 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 54 [2024-06-20 17:31:32,952 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 48 transitions, 135 flow. Second operand has 5 states, 5 states have (on average 13.2) internal successors, (66), 5 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:31:32,952 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:31:32,952 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 54 [2024-06-20 17:31:32,953 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:31:35,697 INFO L124 PetriNetUnfolderBase]: 8198/11283 cut-off events. [2024-06-20 17:31:35,697 INFO L125 PetriNetUnfolderBase]: For 2074/2086 co-relation queries the response was YES. [2024-06-20 17:31:35,711 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25896 conditions, 11283 events. 8198/11283 cut-off events. For 2074/2086 co-relation queries the response was YES. Maximal size of possible extension queue 450. Compared 59668 event pairs, 4492 based on Foata normal form. 9/11287 useless extension candidates. Maximal degree in co-relation 25884. Up to 11138 conditions per place. [2024-06-20 17:31:35,766 INFO L140 encePairwiseOnDemand]: 44/54 looper letters, 66 selfloop transitions, 9 changer transitions 0/83 dead transitions. [2024-06-20 17:31:35,766 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 59 places, 83 transitions, 380 flow [2024-06-20 17:31:35,767 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-20 17:31:35,767 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-20 17:31:35,768 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 123 transitions. [2024-06-20 17:31:35,768 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5694444444444444 [2024-06-20 17:31:35,768 INFO L175 Difference]: Start difference. First operand has 56 places, 48 transitions, 135 flow. Second operand 4 states and 123 transitions. [2024-06-20 17:31:35,769 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 59 places, 83 transitions, 380 flow [2024-06-20 17:31:35,775 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 58 places, 83 transitions, 372 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-06-20 17:31:35,776 INFO L231 Difference]: Finished difference. Result has 60 places, 56 transitions, 206 flow [2024-06-20 17:31:35,777 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=130, PETRI_DIFFERENCE_MINUEND_PLACES=55, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=48, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=206, PETRI_PLACES=60, PETRI_TRANSITIONS=56} [2024-06-20 17:31:35,777 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 3 predicate places. [2024-06-20 17:31:35,778 INFO L495 AbstractCegarLoop]: Abstraction has has 60 places, 56 transitions, 206 flow [2024-06-20 17:31:35,778 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 13.2) internal successors, (66), 5 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:31:35,778 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:31:35,778 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:31:35,779 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-06-20 17:31:35,779 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-20 17:31:35,779 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:31:35,779 INFO L85 PathProgramCache]: Analyzing trace with hash 1648871111, now seen corresponding path program 1 times [2024-06-20 17:31:35,780 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:31:35,780 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2101553204] [2024-06-20 17:31:35,780 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:31:35,780 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:31:35,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:31:38,624 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:31:38,625 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:31:38,625 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2101553204] [2024-06-20 17:31:38,625 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2101553204] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:31:38,625 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:31:38,625 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-20 17:31:38,625 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [462695690] [2024-06-20 17:31:38,626 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:31:38,626 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-20 17:31:38,626 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:31:38,627 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-20 17:31:38,627 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-20 17:31:38,663 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 54 [2024-06-20 17:31:38,664 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 60 places, 56 transitions, 206 flow. Second operand has 6 states, 6 states have (on average 13.166666666666666) internal successors, (79), 6 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) [2024-06-20 17:31:38,664 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:31:38,664 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 54 [2024-06-20 17:31:38,665 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:31:40,896 INFO L124 PetriNetUnfolderBase]: 8182/11259 cut-off events. [2024-06-20 17:31:40,897 INFO L125 PetriNetUnfolderBase]: For 5705/5754 co-relation queries the response was YES. [2024-06-20 17:31:40,918 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28861 conditions, 11259 events. 8182/11259 cut-off events. For 5705/5754 co-relation queries the response was YES. Maximal size of possible extension queue 450. Compared 59551 event pairs, 3651 based on Foata normal form. 27/11281 useless extension candidates. Maximal degree in co-relation 28846. Up to 11060 conditions per place. [2024-06-20 17:31:40,965 INFO L140 encePairwiseOnDemand]: 44/54 looper letters, 75 selfloop transitions, 12 changer transitions 0/95 dead transitions. [2024-06-20 17:31:40,966 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 63 places, 95 transitions, 480 flow [2024-06-20 17:31:40,967 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-20 17:31:40,967 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-20 17:31:40,968 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 147 transitions. [2024-06-20 17:31:40,969 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5444444444444444 [2024-06-20 17:31:40,969 INFO L175 Difference]: Start difference. First operand has 60 places, 56 transitions, 206 flow. Second operand 5 states and 147 transitions. [2024-06-20 17:31:40,969 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 63 places, 95 transitions, 480 flow [2024-06-20 17:31:40,972 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 63 places, 95 transitions, 476 flow, removed 2 selfloop flow, removed 0 redundant places. [2024-06-20 17:31:40,974 INFO L231 Difference]: Finished difference. Result has 64 places, 58 transitions, 252 flow [2024-06-20 17:31:40,974 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=196, PETRI_DIFFERENCE_MINUEND_PLACES=59, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=55, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=252, PETRI_PLACES=64, PETRI_TRANSITIONS=58} [2024-06-20 17:31:40,975 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 7 predicate places. [2024-06-20 17:31:40,975 INFO L495 AbstractCegarLoop]: Abstraction has has 64 places, 58 transitions, 252 flow [2024-06-20 17:31:40,976 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 13.166666666666666) internal successors, (79), 6 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) [2024-06-20 17:31:40,976 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:31:40,976 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:31:40,976 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-06-20 17:31:40,976 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-20 17:31:40,977 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:31:40,977 INFO L85 PathProgramCache]: Analyzing trace with hash 1841027677, now seen corresponding path program 1 times [2024-06-20 17:31:40,977 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:31:40,977 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [454686221] [2024-06-20 17:31:40,978 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:31:40,978 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:31:40,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:31:43,581 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:31:43,581 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:31:43,582 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [454686221] [2024-06-20 17:31:43,582 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [454686221] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:31:43,582 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:31:43,582 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 17:31:43,582 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [973613787] [2024-06-20 17:31:43,582 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:31:43,583 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 17:31:43,583 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:31:43,583 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 17:31:43,584 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-20 17:31:43,620 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 54 [2024-06-20 17:31:43,621 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 64 places, 58 transitions, 252 flow. Second operand has 7 states, 7 states have (on average 12.571428571428571) internal successors, (88), 7 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:31:43,621 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:31:43,621 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 54 [2024-06-20 17:31:43,621 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:31:45,832 INFO L124 PetriNetUnfolderBase]: 7742/10653 cut-off events. [2024-06-20 17:31:45,832 INFO L125 PetriNetUnfolderBase]: For 9948/9950 co-relation queries the response was YES. [2024-06-20 17:31:45,848 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29730 conditions, 10653 events. 7742/10653 cut-off events. For 9948/9950 co-relation queries the response was YES. Maximal size of possible extension queue 437. Compared 57213 event pairs, 4216 based on Foata normal form. 5/10656 useless extension candidates. Maximal degree in co-relation 29711. Up to 10539 conditions per place. [2024-06-20 17:31:45,893 INFO L140 encePairwiseOnDemand]: 44/54 looper letters, 72 selfloop transitions, 12 changer transitions 0/91 dead transitions. [2024-06-20 17:31:45,893 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 68 places, 91 transitions, 534 flow [2024-06-20 17:31:45,894 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-20 17:31:45,894 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-20 17:31:45,897 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 125 transitions. [2024-06-20 17:31:45,897 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46296296296296297 [2024-06-20 17:31:45,897 INFO L175 Difference]: Start difference. First operand has 64 places, 58 transitions, 252 flow. Second operand 5 states and 125 transitions. [2024-06-20 17:31:45,897 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 68 places, 91 transitions, 534 flow [2024-06-20 17:31:45,901 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 65 places, 91 transitions, 498 flow, removed 5 selfloop flow, removed 3 redundant places. [2024-06-20 17:31:45,904 INFO L231 Difference]: Finished difference. Result has 67 places, 68 transitions, 331 flow [2024-06-20 17:31:45,904 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=222, PETRI_DIFFERENCE_MINUEND_PLACES=61, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=58, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=331, PETRI_PLACES=67, PETRI_TRANSITIONS=68} [2024-06-20 17:31:45,906 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 10 predicate places. [2024-06-20 17:31:45,906 INFO L495 AbstractCegarLoop]: Abstraction has has 67 places, 68 transitions, 331 flow [2024-06-20 17:31:45,906 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 12.571428571428571) internal successors, (88), 7 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:31:45,907 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:31:45,907 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:31:45,907 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-06-20 17:31:45,908 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-20 17:31:45,908 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:31:45,908 INFO L85 PathProgramCache]: Analyzing trace with hash -476366526, now seen corresponding path program 1 times [2024-06-20 17:31:45,908 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:31:45,909 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1993479397] [2024-06-20 17:31:45,909 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:31:45,909 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:31:45,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:31:48,780 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:31:48,780 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:31:48,780 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1993479397] [2024-06-20 17:31:48,780 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1993479397] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:31:48,781 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:31:48,781 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 17:31:48,781 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1770897588] [2024-06-20 17:31:48,781 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:31:48,782 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 17:31:48,782 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:31:48,782 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 17:31:48,782 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-20 17:31:48,855 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 54 [2024-06-20 17:31:48,855 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 67 places, 68 transitions, 331 flow. Second operand has 8 states, 8 states have (on average 12.5) internal successors, (100), 8 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:31:48,855 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:31:48,855 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 54 [2024-06-20 17:31:48,855 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:31:51,730 INFO L124 PetriNetUnfolderBase]: 9515/13112 cut-off events. [2024-06-20 17:31:51,730 INFO L125 PetriNetUnfolderBase]: For 19795/19954 co-relation queries the response was YES. [2024-06-20 17:31:51,749 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39963 conditions, 13112 events. 9515/13112 cut-off events. For 19795/19954 co-relation queries the response was YES. Maximal size of possible extension queue 528. Compared 70753 event pairs, 4351 based on Foata normal form. 63/13141 useless extension candidates. Maximal degree in co-relation 39941. Up to 12789 conditions per place. [2024-06-20 17:31:51,920 INFO L140 encePairwiseOnDemand]: 43/54 looper letters, 80 selfloop transitions, 26 changer transitions 0/115 dead transitions. [2024-06-20 17:31:51,924 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 72 places, 115 transitions, 713 flow [2024-06-20 17:31:51,925 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-20 17:31:51,925 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-20 17:31:51,926 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 158 transitions. [2024-06-20 17:31:51,927 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4876543209876543 [2024-06-20 17:31:51,933 INFO L175 Difference]: Start difference. First operand has 67 places, 68 transitions, 331 flow. Second operand 6 states and 158 transitions. [2024-06-20 17:31:51,933 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 72 places, 115 transitions, 713 flow [2024-06-20 17:31:51,944 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 71 places, 115 transitions, 703 flow, removed 4 selfloop flow, removed 1 redundant places. [2024-06-20 17:31:51,947 INFO L231 Difference]: Finished difference. Result has 72 places, 76 transitions, 444 flow [2024-06-20 17:31:51,947 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=321, PETRI_DIFFERENCE_MINUEND_PLACES=66, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=68, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=444, PETRI_PLACES=72, PETRI_TRANSITIONS=76} [2024-06-20 17:31:51,949 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 15 predicate places. [2024-06-20 17:31:51,949 INFO L495 AbstractCegarLoop]: Abstraction has has 72 places, 76 transitions, 444 flow [2024-06-20 17:31:51,950 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.5) internal successors, (100), 8 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:31:51,950 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:31:51,950 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:31:51,950 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-06-20 17:31:51,950 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-20 17:31:51,951 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:31:51,951 INFO L85 PathProgramCache]: Analyzing trace with hash -2033032928, now seen corresponding path program 2 times [2024-06-20 17:31:51,952 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:31:51,952 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [564056776] [2024-06-20 17:31:51,952 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:31:51,952 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:31:51,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:31:54,501 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:31:54,501 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:31:54,501 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [564056776] [2024-06-20 17:31:54,502 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [564056776] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:31:54,502 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:31:54,502 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 17:31:54,503 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2090163624] [2024-06-20 17:31:54,503 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:31:54,503 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 17:31:54,503 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:31:54,504 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 17:31:54,504 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-20 17:31:54,571 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 54 [2024-06-20 17:31:54,571 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 72 places, 76 transitions, 444 flow. Second operand has 8 states, 8 states have (on average 12.5) internal successors, (100), 8 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:31:54,571 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:31:54,571 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 54 [2024-06-20 17:31:54,571 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:31:57,123 INFO L124 PetriNetUnfolderBase]: 9506/13100 cut-off events. [2024-06-20 17:31:57,123 INFO L125 PetriNetUnfolderBase]: For 30755/30937 co-relation queries the response was YES. [2024-06-20 17:31:57,147 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43712 conditions, 13100 events. 9506/13100 cut-off events. For 30755/30937 co-relation queries the response was YES. Maximal size of possible extension queue 528. Compared 70801 event pairs, 4351 based on Foata normal form. 72/13140 useless extension candidates. Maximal degree in co-relation 43687. Up to 12799 conditions per place. [2024-06-20 17:31:57,204 INFO L140 encePairwiseOnDemand]: 43/54 looper letters, 72 selfloop transitions, 22 changer transitions 0/103 dead transitions. [2024-06-20 17:31:57,205 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 76 places, 103 transitions, 698 flow [2024-06-20 17:31:57,206 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-20 17:31:57,206 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-20 17:31:57,207 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 131 transitions. [2024-06-20 17:31:57,207 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48518518518518516 [2024-06-20 17:31:57,207 INFO L175 Difference]: Start difference. First operand has 72 places, 76 transitions, 444 flow. Second operand 5 states and 131 transitions. [2024-06-20 17:31:57,207 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 76 places, 103 transitions, 698 flow [2024-06-20 17:31:57,234 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 74 places, 103 transitions, 653 flow, removed 15 selfloop flow, removed 2 redundant places. [2024-06-20 17:31:57,236 INFO L231 Difference]: Finished difference. Result has 75 places, 76 transitions, 461 flow [2024-06-20 17:31:57,236 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=399, PETRI_DIFFERENCE_MINUEND_PLACES=70, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=76, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=54, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=461, PETRI_PLACES=75, PETRI_TRANSITIONS=76} [2024-06-20 17:31:57,240 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 18 predicate places. [2024-06-20 17:31:57,240 INFO L495 AbstractCegarLoop]: Abstraction has has 75 places, 76 transitions, 461 flow [2024-06-20 17:31:57,240 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.5) internal successors, (100), 8 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:31:57,240 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:31:57,240 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:31:57,240 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-06-20 17:31:57,241 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-20 17:31:57,241 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:31:57,241 INFO L85 PathProgramCache]: Analyzing trace with hash 1029217530, now seen corresponding path program 1 times [2024-06-20 17:31:57,241 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:31:57,245 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [72931269] [2024-06-20 17:31:57,246 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:31:57,246 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:31:57,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:32:00,034 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:32:00,035 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:32:00,035 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [72931269] [2024-06-20 17:32:00,035 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [72931269] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:32:00,035 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:32:00,035 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 17:32:00,036 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1842782385] [2024-06-20 17:32:00,036 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:32:00,036 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 17:32:00,036 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:32:00,037 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 17:32:00,037 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-20 17:32:00,117 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 54 [2024-06-20 17:32:00,117 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 75 places, 76 transitions, 461 flow. Second operand has 8 states, 8 states have (on average 12.5) internal successors, (100), 8 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:32:00,117 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:32:00,117 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 54 [2024-06-20 17:32:00,118 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:32:02,497 INFO L124 PetriNetUnfolderBase]: 7757/10683 cut-off events. [2024-06-20 17:32:02,497 INFO L125 PetriNetUnfolderBase]: For 28366/28374 co-relation queries the response was YES. [2024-06-20 17:32:02,513 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36508 conditions, 10683 events. 7757/10683 cut-off events. For 28366/28374 co-relation queries the response was YES. Maximal size of possible extension queue 437. Compared 57797 event pairs, 3902 based on Foata normal form. 14/10695 useless extension candidates. Maximal degree in co-relation 36481. Up to 10521 conditions per place. [2024-06-20 17:32:02,550 INFO L140 encePairwiseOnDemand]: 44/54 looper letters, 90 selfloop transitions, 15 changer transitions 0/112 dead transitions. [2024-06-20 17:32:02,550 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 80 places, 112 transitions, 776 flow [2024-06-20 17:32:02,551 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-20 17:32:02,552 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-20 17:32:02,553 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 149 transitions. [2024-06-20 17:32:02,553 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45987654320987653 [2024-06-20 17:32:02,553 INFO L175 Difference]: Start difference. First operand has 75 places, 76 transitions, 461 flow. Second operand 6 states and 149 transitions. [2024-06-20 17:32:02,553 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 80 places, 112 transitions, 776 flow [2024-06-20 17:32:02,570 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 76 places, 112 transitions, 732 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-06-20 17:32:02,572 INFO L231 Difference]: Finished difference. Result has 77 places, 79 transitions, 485 flow [2024-06-20 17:32:02,572 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=417, PETRI_DIFFERENCE_MINUEND_PLACES=71, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=76, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=61, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=485, PETRI_PLACES=77, PETRI_TRANSITIONS=79} [2024-06-20 17:32:02,573 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 20 predicate places. [2024-06-20 17:32:02,573 INFO L495 AbstractCegarLoop]: Abstraction has has 77 places, 79 transitions, 485 flow [2024-06-20 17:32:02,573 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.5) internal successors, (100), 8 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:32:02,574 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:32:02,574 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:32:02,574 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-06-20 17:32:02,574 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-20 17:32:02,574 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:32:02,574 INFO L85 PathProgramCache]: Analyzing trace with hash -1882458588, now seen corresponding path program 1 times [2024-06-20 17:32:02,575 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:32:02,575 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [961059601] [2024-06-20 17:32:02,575 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:32:02,575 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:32:02,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:32:05,566 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:32:05,567 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:32:05,567 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [961059601] [2024-06-20 17:32:05,567 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [961059601] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:32:05,567 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:32:05,567 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 17:32:05,567 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1952694160] [2024-06-20 17:32:05,568 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:32:05,568 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 17:32:05,568 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:32:05,569 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 17:32:05,569 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2024-06-20 17:32:05,590 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 54 [2024-06-20 17:32:05,590 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 77 places, 79 transitions, 485 flow. Second operand has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:32:05,590 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:32:05,590 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 54 [2024-06-20 17:32:05,591 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:32:08,796 INFO L124 PetriNetUnfolderBase]: 9864/13516 cut-off events. [2024-06-20 17:32:08,797 INFO L125 PetriNetUnfolderBase]: For 43721/43748 co-relation queries the response was YES. [2024-06-20 17:32:08,818 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47757 conditions, 13516 events. 9864/13516 cut-off events. For 43721/43748 co-relation queries the response was YES. Maximal size of possible extension queue 484. Compared 71308 event pairs, 4485 based on Foata normal form. 25/13537 useless extension candidates. Maximal degree in co-relation 47729. Up to 13175 conditions per place. [2024-06-20 17:32:08,859 INFO L140 encePairwiseOnDemand]: 42/54 looper letters, 112 selfloop transitions, 28 changer transitions 0/146 dead transitions. [2024-06-20 17:32:08,859 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 83 places, 146 transitions, 1055 flow [2024-06-20 17:32:08,860 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 17:32:08,860 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 17:32:08,860 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 178 transitions. [2024-06-20 17:32:08,861 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4708994708994709 [2024-06-20 17:32:08,861 INFO L175 Difference]: Start difference. First operand has 77 places, 79 transitions, 485 flow. Second operand 7 states and 178 transitions. [2024-06-20 17:32:08,861 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 83 places, 146 transitions, 1055 flow [2024-06-20 17:32:08,878 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 79 places, 146 transitions, 1013 flow, removed 8 selfloop flow, removed 4 redundant places. [2024-06-20 17:32:08,880 INFO L231 Difference]: Finished difference. Result has 82 places, 96 transitions, 673 flow [2024-06-20 17:32:08,881 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=443, PETRI_DIFFERENCE_MINUEND_PLACES=73, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=79, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=56, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=673, PETRI_PLACES=82, PETRI_TRANSITIONS=96} [2024-06-20 17:32:08,881 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 25 predicate places. [2024-06-20 17:32:08,881 INFO L495 AbstractCegarLoop]: Abstraction has has 82 places, 96 transitions, 673 flow [2024-06-20 17:32:08,882 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:32:08,882 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:32:08,882 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:32:08,882 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-06-20 17:32:08,882 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-20 17:32:08,883 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:32:08,883 INFO L85 PathProgramCache]: Analyzing trace with hash 1400496082, now seen corresponding path program 2 times [2024-06-20 17:32:08,883 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:32:08,883 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [645654059] [2024-06-20 17:32:08,883 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:32:08,883 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:32:08,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:32:11,498 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:32:11,499 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:32:11,499 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [645654059] [2024-06-20 17:32:11,499 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [645654059] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:32:11,499 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:32:11,499 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 17:32:11,499 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1019205674] [2024-06-20 17:32:11,499 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:32:11,500 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 17:32:11,500 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:32:11,500 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 17:32:11,501 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-20 17:32:11,562 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 54 [2024-06-20 17:32:11,562 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 82 places, 96 transitions, 673 flow. Second operand has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:32:11,562 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:32:11,562 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 54 [2024-06-20 17:32:11,562 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:32:14,752 INFO L124 PetriNetUnfolderBase]: 9891/13571 cut-off events. [2024-06-20 17:32:14,752 INFO L125 PetriNetUnfolderBase]: For 56906/56965 co-relation queries the response was YES. [2024-06-20 17:32:14,778 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51333 conditions, 13571 events. 9891/13571 cut-off events. For 56906/56965 co-relation queries the response was YES. Maximal size of possible extension queue 484. Compared 71692 event pairs, 4457 based on Foata normal form. 50/13619 useless extension candidates. Maximal degree in co-relation 51302. Up to 13241 conditions per place. [2024-06-20 17:32:14,824 INFO L140 encePairwiseOnDemand]: 42/54 looper letters, 128 selfloop transitions, 27 changer transitions 0/161 dead transitions. [2024-06-20 17:32:14,824 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 89 places, 161 transitions, 1232 flow [2024-06-20 17:32:14,825 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 17:32:14,825 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 17:32:14,826 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 200 transitions. [2024-06-20 17:32:14,826 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46296296296296297 [2024-06-20 17:32:14,826 INFO L175 Difference]: Start difference. First operand has 82 places, 96 transitions, 673 flow. Second operand 8 states and 200 transitions. [2024-06-20 17:32:14,826 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 89 places, 161 transitions, 1232 flow [2024-06-20 17:32:14,856 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 86 places, 161 transitions, 1176 flow, removed 17 selfloop flow, removed 3 redundant places. [2024-06-20 17:32:14,858 INFO L231 Difference]: Finished difference. Result has 88 places, 102 transitions, 749 flow [2024-06-20 17:32:14,859 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=621, PETRI_DIFFERENCE_MINUEND_PLACES=79, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=96, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=74, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=749, PETRI_PLACES=88, PETRI_TRANSITIONS=102} [2024-06-20 17:32:14,859 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 31 predicate places. [2024-06-20 17:32:14,859 INFO L495 AbstractCegarLoop]: Abstraction has has 88 places, 102 transitions, 749 flow [2024-06-20 17:32:14,860 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:32:14,860 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:32:14,860 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:32:14,860 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-06-20 17:32:14,860 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-20 17:32:14,861 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:32:14,861 INFO L85 PathProgramCache]: Analyzing trace with hash 1400490502, now seen corresponding path program 3 times [2024-06-20 17:32:14,861 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:32:14,861 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2093234551] [2024-06-20 17:32:14,861 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:32:14,862 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:32:14,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:32:17,434 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:32:17,434 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:32:17,434 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2093234551] [2024-06-20 17:32:17,434 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2093234551] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:32:17,434 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:32:17,434 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 17:32:17,435 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [847543464] [2024-06-20 17:32:17,435 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:32:17,435 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 17:32:17,435 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:32:17,436 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 17:32:17,436 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-20 17:32:17,460 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 54 [2024-06-20 17:32:17,460 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 88 places, 102 transitions, 749 flow. Second operand has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:32:17,460 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:32:17,460 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 54 [2024-06-20 17:32:17,460 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:32:20,354 INFO L124 PetriNetUnfolderBase]: 9882/13551 cut-off events. [2024-06-20 17:32:20,354 INFO L125 PetriNetUnfolderBase]: For 64553/64589 co-relation queries the response was YES. [2024-06-20 17:32:20,385 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51929 conditions, 13551 events. 9882/13551 cut-off events. For 64553/64589 co-relation queries the response was YES. Maximal size of possible extension queue 484. Compared 71395 event pairs, 4485 based on Foata normal form. 33/13580 useless extension candidates. Maximal degree in co-relation 51896. Up to 13232 conditions per place. [2024-06-20 17:32:20,434 INFO L140 encePairwiseOnDemand]: 42/54 looper letters, 107 selfloop transitions, 26 changer transitions 0/139 dead transitions. [2024-06-20 17:32:20,434 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 93 places, 139 transitions, 1108 flow [2024-06-20 17:32:20,435 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-20 17:32:20,435 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-20 17:32:20,436 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 152 transitions. [2024-06-20 17:32:20,436 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4691358024691358 [2024-06-20 17:32:20,436 INFO L175 Difference]: Start difference. First operand has 88 places, 102 transitions, 749 flow. Second operand 6 states and 152 transitions. [2024-06-20 17:32:20,436 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 93 places, 139 transitions, 1108 flow [2024-06-20 17:32:20,481 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 88 places, 139 transitions, 1014 flow, removed 21 selfloop flow, removed 5 redundant places. [2024-06-20 17:32:20,483 INFO L231 Difference]: Finished difference. Result has 89 places, 102 transitions, 718 flow [2024-06-20 17:32:20,483 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=655, PETRI_DIFFERENCE_MINUEND_PLACES=83, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=102, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=76, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=718, PETRI_PLACES=89, PETRI_TRANSITIONS=102} [2024-06-20 17:32:20,483 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 32 predicate places. [2024-06-20 17:32:20,484 INFO L495 AbstractCegarLoop]: Abstraction has has 89 places, 102 transitions, 718 flow [2024-06-20 17:32:20,484 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:32:20,484 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:32:20,484 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:32:20,485 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-06-20 17:32:20,485 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-20 17:32:20,485 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:32:20,485 INFO L85 PathProgramCache]: Analyzing trace with hash -977966079, now seen corresponding path program 1 times [2024-06-20 17:32:20,485 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:32:20,485 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [253650060] [2024-06-20 17:32:20,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:32:20,486 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:32:20,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:32:23,133 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:32:23,133 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:32:23,133 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [253650060] [2024-06-20 17:32:23,133 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [253650060] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:32:23,133 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:32:23,133 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 17:32:23,134 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [754062120] [2024-06-20 17:32:23,134 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:32:23,134 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 17:32:23,134 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:32:23,135 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 17:32:23,135 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-20 17:32:23,254 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 54 [2024-06-20 17:32:23,255 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 89 places, 102 transitions, 718 flow. Second operand has 9 states, 9 states have (on average 12.444444444444445) internal successors, (112), 9 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:32:23,255 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:32:23,255 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 54 [2024-06-20 17:32:23,255 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:32:26,289 INFO L124 PetriNetUnfolderBase]: 9643/13304 cut-off events. [2024-06-20 17:32:26,290 INFO L125 PetriNetUnfolderBase]: For 83341/83428 co-relation queries the response was YES. [2024-06-20 17:32:26,316 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53082 conditions, 13304 events. 9643/13304 cut-off events. For 83341/83428 co-relation queries the response was YES. Maximal size of possible extension queue 531. Compared 72106 event pairs, 3313 based on Foata normal form. 60/13100 useless extension candidates. Maximal degree in co-relation 53048. Up to 12625 conditions per place. [2024-06-20 17:32:26,362 INFO L140 encePairwiseOnDemand]: 43/54 looper letters, 101 selfloop transitions, 42 changer transitions 0/158 dead transitions. [2024-06-20 17:32:26,363 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 95 places, 158 transitions, 1248 flow [2024-06-20 17:32:26,364 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 17:32:26,364 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 17:32:26,364 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 183 transitions. [2024-06-20 17:32:26,364 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48412698412698413 [2024-06-20 17:32:26,365 INFO L175 Difference]: Start difference. First operand has 89 places, 102 transitions, 718 flow. Second operand 7 states and 183 transitions. [2024-06-20 17:32:26,365 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 95 places, 158 transitions, 1248 flow [2024-06-20 17:32:26,419 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 90 places, 158 transitions, 1196 flow, removed 0 selfloop flow, removed 5 redundant places. [2024-06-20 17:32:26,421 INFO L231 Difference]: Finished difference. Result has 91 places, 108 transitions, 830 flow [2024-06-20 17:32:26,422 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=666, PETRI_DIFFERENCE_MINUEND_PLACES=84, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=102, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=63, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=830, PETRI_PLACES=91, PETRI_TRANSITIONS=108} [2024-06-20 17:32:26,422 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 34 predicate places. [2024-06-20 17:32:26,423 INFO L495 AbstractCegarLoop]: Abstraction has has 91 places, 108 transitions, 830 flow [2024-06-20 17:32:26,423 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.444444444444445) internal successors, (112), 9 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:32:26,423 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:32:26,423 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:32:26,423 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-06-20 17:32:26,424 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-20 17:32:26,424 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:32:26,424 INFO L85 PathProgramCache]: Analyzing trace with hash -980644479, now seen corresponding path program 2 times [2024-06-20 17:32:26,424 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:32:26,424 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [797774242] [2024-06-20 17:32:26,425 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:32:26,425 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:32:26,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:32:28,921 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:32:28,922 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:32:28,922 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [797774242] [2024-06-20 17:32:28,922 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [797774242] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:32:28,922 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:32:28,922 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 17:32:28,922 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1337524156] [2024-06-20 17:32:28,923 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:32:28,923 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 17:32:28,923 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:32:28,924 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 17:32:28,924 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2024-06-20 17:32:28,993 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 54 [2024-06-20 17:32:28,994 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 91 places, 108 transitions, 830 flow. Second operand has 9 states, 9 states have (on average 12.444444444444445) internal successors, (112), 9 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:32:28,994 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:32:28,995 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 54 [2024-06-20 17:32:28,995 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:32:32,334 INFO L124 PetriNetUnfolderBase]: 9689/13376 cut-off events. [2024-06-20 17:32:32,334 INFO L125 PetriNetUnfolderBase]: For 102537/102650 co-relation queries the response was YES. [2024-06-20 17:32:32,380 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56342 conditions, 13376 events. 9689/13376 cut-off events. For 102537/102650 co-relation queries the response was YES. Maximal size of possible extension queue 531. Compared 72531 event pairs, 3938 based on Foata normal form. 54/13158 useless extension candidates. Maximal degree in co-relation 56307. Up to 12830 conditions per place. [2024-06-20 17:32:32,433 INFO L140 encePairwiseOnDemand]: 43/54 looper letters, 104 selfloop transitions, 38 changer transitions 0/157 dead transitions. [2024-06-20 17:32:32,433 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 97 places, 157 transitions, 1264 flow [2024-06-20 17:32:32,434 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 17:32:32,435 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 17:32:32,435 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 179 transitions. [2024-06-20 17:32:32,435 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47354497354497355 [2024-06-20 17:32:32,436 INFO L175 Difference]: Start difference. First operand has 91 places, 108 transitions, 830 flow. Second operand 7 states and 179 transitions. [2024-06-20 17:32:32,436 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 97 places, 157 transitions, 1264 flow [2024-06-20 17:32:32,505 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 94 places, 157 transitions, 1192 flow, removed 17 selfloop flow, removed 3 redundant places. [2024-06-20 17:32:32,507 INFO L231 Difference]: Finished difference. Result has 95 places, 111 transitions, 889 flow [2024-06-20 17:32:32,507 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=764, PETRI_DIFFERENCE_MINUEND_PLACES=88, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=108, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=70, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=889, PETRI_PLACES=95, PETRI_TRANSITIONS=111} [2024-06-20 17:32:32,507 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 38 predicate places. [2024-06-20 17:32:32,508 INFO L495 AbstractCegarLoop]: Abstraction has has 95 places, 111 transitions, 889 flow [2024-06-20 17:32:32,508 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.444444444444445) internal successors, (112), 9 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:32:32,508 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:32:32,508 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:32:32,508 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-06-20 17:32:32,508 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-20 17:32:32,509 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:32:32,509 INFO L85 PathProgramCache]: Analyzing trace with hash 465529503, now seen corresponding path program 3 times [2024-06-20 17:32:32,509 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:32:32,509 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1527332784] [2024-06-20 17:32:32,509 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:32:32,510 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:32:32,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:32:35,008 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:32:35,008 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:32:35,008 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1527332784] [2024-06-20 17:32:35,008 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1527332784] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:32:35,009 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:32:35,009 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 17:32:35,009 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1521870837] [2024-06-20 17:32:35,009 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:32:35,009 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 17:32:35,009 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:32:35,010 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 17:32:35,010 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-20 17:32:35,071 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 54 [2024-06-20 17:32:35,072 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 95 places, 111 transitions, 889 flow. Second operand has 9 states, 9 states have (on average 12.444444444444445) internal successors, (112), 9 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:32:35,072 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:32:35,072 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 54 [2024-06-20 17:32:35,072 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:32:38,150 INFO L124 PetriNetUnfolderBase]: 9666/13343 cut-off events. [2024-06-20 17:32:38,150 INFO L125 PetriNetUnfolderBase]: For 113672/113785 co-relation queries the response was YES. [2024-06-20 17:32:38,172 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57281 conditions, 13343 events. 9666/13343 cut-off events. For 113672/113785 co-relation queries the response was YES. Maximal size of possible extension queue 531. Compared 72309 event pairs, 3304 based on Foata normal form. 78/13151 useless extension candidates. Maximal degree in co-relation 57244. Up to 12766 conditions per place. [2024-06-20 17:32:38,216 INFO L140 encePairwiseOnDemand]: 43/54 looper letters, 99 selfloop transitions, 34 changer transitions 0/148 dead transitions. [2024-06-20 17:32:38,216 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 100 places, 148 transitions, 1245 flow [2024-06-20 17:32:38,217 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-20 17:32:38,217 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-20 17:32:38,218 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 156 transitions. [2024-06-20 17:32:38,218 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48148148148148145 [2024-06-20 17:32:38,218 INFO L175 Difference]: Start difference. First operand has 95 places, 111 transitions, 889 flow. Second operand 6 states and 156 transitions. [2024-06-20 17:32:38,218 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 100 places, 148 transitions, 1245 flow [2024-06-20 17:32:38,291 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 95 places, 148 transitions, 1146 flow, removed 14 selfloop flow, removed 5 redundant places. [2024-06-20 17:32:38,293 INFO L231 Difference]: Finished difference. Result has 96 places, 111 transitions, 874 flow [2024-06-20 17:32:38,293 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=790, PETRI_DIFFERENCE_MINUEND_PLACES=90, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=111, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=77, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=874, PETRI_PLACES=96, PETRI_TRANSITIONS=111} [2024-06-20 17:32:38,294 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 39 predicate places. [2024-06-20 17:32:38,294 INFO L495 AbstractCegarLoop]: Abstraction has has 96 places, 111 transitions, 874 flow [2024-06-20 17:32:38,294 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.444444444444445) internal successors, (112), 9 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:32:38,294 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:32:38,294 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:32:38,295 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-06-20 17:32:38,295 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-20 17:32:38,295 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:32:38,295 INFO L85 PathProgramCache]: Analyzing trace with hash 800624740, now seen corresponding path program 1 times [2024-06-20 17:32:38,295 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:32:38,296 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1233546550] [2024-06-20 17:32:38,296 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:32:38,296 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:32:38,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:32:40,759 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:32:40,759 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:32:40,760 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1233546550] [2024-06-20 17:32:40,760 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1233546550] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:32:40,760 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:32:40,760 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 17:32:40,760 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [865204007] [2024-06-20 17:32:40,760 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:32:40,760 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 17:32:40,760 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:32:40,761 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 17:32:40,761 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-20 17:32:40,803 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 54 [2024-06-20 17:32:40,803 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 96 places, 111 transitions, 874 flow. Second operand has 7 states, 7 states have (on average 14.142857142857142) internal successors, (99), 7 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) [2024-06-20 17:32:40,803 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:32:40,803 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 54 [2024-06-20 17:32:40,803 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:32:42,866 INFO L124 PetriNetUnfolderBase]: 7463/10428 cut-off events. [2024-06-20 17:32:42,866 INFO L125 PetriNetUnfolderBase]: For 92535/92572 co-relation queries the response was YES. [2024-06-20 17:32:42,893 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45506 conditions, 10428 events. 7463/10428 cut-off events. For 92535/92572 co-relation queries the response was YES. Maximal size of possible extension queue 431. Compared 56838 event pairs, 3495 based on Foata normal form. 39/10440 useless extension candidates. Maximal degree in co-relation 45468. Up to 10152 conditions per place. [2024-06-20 17:32:42,934 INFO L140 encePairwiseOnDemand]: 45/54 looper letters, 103 selfloop transitions, 18 changer transitions 0/133 dead transitions. [2024-06-20 17:32:42,934 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 100 places, 133 transitions, 1196 flow [2024-06-20 17:32:42,935 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-20 17:32:42,935 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-20 17:32:42,935 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 124 transitions. [2024-06-20 17:32:42,936 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45925925925925926 [2024-06-20 17:32:42,936 INFO L175 Difference]: Start difference. First operand has 96 places, 111 transitions, 874 flow. Second operand 5 states and 124 transitions. [2024-06-20 17:32:42,936 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 100 places, 133 transitions, 1196 flow [2024-06-20 17:32:42,997 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 95 places, 133 transitions, 1117 flow, removed 3 selfloop flow, removed 5 redundant places. [2024-06-20 17:32:42,999 INFO L231 Difference]: Finished difference. Result has 96 places, 115 transitions, 885 flow [2024-06-20 17:32:43,000 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=795, PETRI_DIFFERENCE_MINUEND_PLACES=91, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=111, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=93, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=885, PETRI_PLACES=96, PETRI_TRANSITIONS=115} [2024-06-20 17:32:43,000 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 39 predicate places. [2024-06-20 17:32:43,000 INFO L495 AbstractCegarLoop]: Abstraction has has 96 places, 115 transitions, 885 flow [2024-06-20 17:32:43,001 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 14.142857142857142) internal successors, (99), 7 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) [2024-06-20 17:32:43,001 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:32:43,001 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:32:43,001 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-06-20 17:32:43,001 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-20 17:32:43,002 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:32:43,002 INFO L85 PathProgramCache]: Analyzing trace with hash -950131451, now seen corresponding path program 1 times [2024-06-20 17:32:43,002 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:32:43,002 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [120788307] [2024-06-20 17:32:43,002 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:32:43,002 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:32:43,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:32:46,290 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:32:46,291 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:32:46,291 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [120788307] [2024-06-20 17:32:46,291 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [120788307] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:32:46,291 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:32:46,291 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 17:32:46,291 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1672116195] [2024-06-20 17:32:46,291 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:32:46,291 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 17:32:46,291 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:32:46,292 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 17:32:46,292 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-20 17:32:46,350 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 54 [2024-06-20 17:32:46,351 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 96 places, 115 transitions, 885 flow. Second operand has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:32:46,351 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:32:46,351 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 54 [2024-06-20 17:32:46,351 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:32:49,616 INFO L124 PetriNetUnfolderBase]: 10242/14115 cut-off events. [2024-06-20 17:32:49,617 INFO L125 PetriNetUnfolderBase]: For 135309/135345 co-relation queries the response was YES. [2024-06-20 17:32:49,650 INFO L83 FinitePrefix]: Finished finitePrefix Result has 62639 conditions, 14115 events. 10242/14115 cut-off events. For 135309/135345 co-relation queries the response was YES. Maximal size of possible extension queue 489. Compared 75196 event pairs, 3004 based on Foata normal form. 48/14159 useless extension candidates. Maximal degree in co-relation 62600. Up to 13090 conditions per place. [2024-06-20 17:32:49,703 INFO L140 encePairwiseOnDemand]: 42/54 looper letters, 146 selfloop transitions, 42 changer transitions 0/194 dead transitions. [2024-06-20 17:32:49,703 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 103 places, 194 transitions, 1633 flow [2024-06-20 17:32:49,704 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 17:32:49,704 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 17:32:49,705 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 206 transitions. [2024-06-20 17:32:49,705 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47685185185185186 [2024-06-20 17:32:49,705 INFO L175 Difference]: Start difference. First operand has 96 places, 115 transitions, 885 flow. Second operand 8 states and 206 transitions. [2024-06-20 17:32:49,705 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 103 places, 194 transitions, 1633 flow [2024-06-20 17:32:49,793 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 100 places, 194 transitions, 1577 flow, removed 13 selfloop flow, removed 3 redundant places. [2024-06-20 17:32:49,795 INFO L231 Difference]: Finished difference. Result has 103 places, 126 transitions, 1064 flow [2024-06-20 17:32:49,795 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=829, PETRI_DIFFERENCE_MINUEND_PLACES=93, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=115, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=76, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1064, PETRI_PLACES=103, PETRI_TRANSITIONS=126} [2024-06-20 17:32:49,796 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 46 predicate places. [2024-06-20 17:32:49,796 INFO L495 AbstractCegarLoop]: Abstraction has has 103 places, 126 transitions, 1064 flow [2024-06-20 17:32:49,796 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:32:49,796 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:32:49,796 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:32:49,797 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-06-20 17:32:49,797 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-20 17:32:49,797 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:32:49,797 INFO L85 PathProgramCache]: Analyzing trace with hash -248366267, now seen corresponding path program 2 times [2024-06-20 17:32:49,797 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:32:49,797 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1341953142] [2024-06-20 17:32:49,798 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:32:49,798 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:32:49,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:32:52,794 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:32:52,794 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:32:52,794 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1341953142] [2024-06-20 17:32:52,796 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1341953142] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:32:52,796 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:32:52,796 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 17:32:52,796 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1036435305] [2024-06-20 17:32:52,796 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:32:52,797 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 17:32:52,797 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:32:52,797 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 17:32:52,797 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2024-06-20 17:32:52,865 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 54 [2024-06-20 17:32:52,865 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 103 places, 126 transitions, 1064 flow. Second operand has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:32:52,865 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:32:52,866 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 54 [2024-06-20 17:32:52,866 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:32:56,780 INFO L124 PetriNetUnfolderBase]: 10398/14371 cut-off events. [2024-06-20 17:32:56,780 INFO L125 PetriNetUnfolderBase]: For 155607/155643 co-relation queries the response was YES. [2024-06-20 17:32:56,808 INFO L83 FinitePrefix]: Finished finitePrefix Result has 65918 conditions, 14371 events. 10398/14371 cut-off events. For 155607/155643 co-relation queries the response was YES. Maximal size of possible extension queue 490. Compared 77267 event pairs, 4008 based on Foata normal form. 54/14421 useless extension candidates. Maximal degree in co-relation 65876. Up to 13782 conditions per place. [2024-06-20 17:32:56,856 INFO L140 encePairwiseOnDemand]: 42/54 looper letters, 146 selfloop transitions, 35 changer transitions 0/187 dead transitions. [2024-06-20 17:32:56,856 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 110 places, 187 transitions, 1613 flow [2024-06-20 17:32:56,857 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 17:32:56,857 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 17:32:56,858 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 200 transitions. [2024-06-20 17:32:56,858 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46296296296296297 [2024-06-20 17:32:56,858 INFO L175 Difference]: Start difference. First operand has 103 places, 126 transitions, 1064 flow. Second operand 8 states and 200 transitions. [2024-06-20 17:32:56,858 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 110 places, 187 transitions, 1613 flow [2024-06-20 17:32:56,955 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 107 places, 187 transitions, 1554 flow, removed 12 selfloop flow, removed 3 redundant places. [2024-06-20 17:32:56,957 INFO L231 Difference]: Finished difference. Result has 108 places, 128 transitions, 1121 flow [2024-06-20 17:32:56,958 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=1005, PETRI_DIFFERENCE_MINUEND_PLACES=100, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=126, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=91, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1121, PETRI_PLACES=108, PETRI_TRANSITIONS=128} [2024-06-20 17:32:56,958 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 51 predicate places. [2024-06-20 17:32:56,958 INFO L495 AbstractCegarLoop]: Abstraction has has 108 places, 128 transitions, 1121 flow [2024-06-20 17:32:56,958 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:32:56,959 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:32:56,959 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:32:56,959 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-06-20 17:32:56,959 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-20 17:32:56,959 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:32:56,960 INFO L85 PathProgramCache]: Analyzing trace with hash -248514137, now seen corresponding path program 3 times [2024-06-20 17:32:56,960 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:32:56,960 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [767188855] [2024-06-20 17:32:56,960 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:32:56,960 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:32:56,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:32:59,812 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:32:59,812 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:32:59,813 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [767188855] [2024-06-20 17:32:59,813 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [767188855] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:32:59,813 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:32:59,813 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 17:32:59,813 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1374420556] [2024-06-20 17:32:59,813 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:32:59,813 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 17:32:59,814 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:32:59,814 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 17:32:59,814 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-20 17:32:59,857 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 54 [2024-06-20 17:32:59,858 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 108 places, 128 transitions, 1121 flow. Second operand has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:32:59,858 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:32:59,858 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 54 [2024-06-20 17:32:59,858 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:33:03,217 INFO L124 PetriNetUnfolderBase]: 10510/14543 cut-off events. [2024-06-20 17:33:03,217 INFO L125 PetriNetUnfolderBase]: For 172441/172477 co-relation queries the response was YES. [2024-06-20 17:33:03,260 INFO L83 FinitePrefix]: Finished finitePrefix Result has 67996 conditions, 14543 events. 10510/14543 cut-off events. For 172441/172477 co-relation queries the response was YES. Maximal size of possible extension queue 494. Compared 78634 event pairs, 3992 based on Foata normal form. 48/14587 useless extension candidates. Maximal degree in co-relation 67952. Up to 13772 conditions per place. [2024-06-20 17:33:03,314 INFO L140 encePairwiseOnDemand]: 42/54 looper letters, 149 selfloop transitions, 39 changer transitions 0/194 dead transitions. [2024-06-20 17:33:03,314 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 115 places, 194 transitions, 1714 flow [2024-06-20 17:33:03,315 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 17:33:03,315 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 17:33:03,316 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 203 transitions. [2024-06-20 17:33:03,316 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4699074074074074 [2024-06-20 17:33:03,316 INFO L175 Difference]: Start difference. First operand has 108 places, 128 transitions, 1121 flow. Second operand 8 states and 203 transitions. [2024-06-20 17:33:03,317 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 115 places, 194 transitions, 1714 flow [2024-06-20 17:33:03,455 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 109 places, 194 transitions, 1632 flow, removed 8 selfloop flow, removed 6 redundant places. [2024-06-20 17:33:03,457 INFO L231 Difference]: Finished difference. Result has 111 places, 132 transitions, 1192 flow [2024-06-20 17:33:03,457 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=1039, PETRI_DIFFERENCE_MINUEND_PLACES=102, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=128, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=90, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1192, PETRI_PLACES=111, PETRI_TRANSITIONS=132} [2024-06-20 17:33:03,458 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 54 predicate places. [2024-06-20 17:33:03,458 INFO L495 AbstractCegarLoop]: Abstraction has has 111 places, 132 transitions, 1192 flow [2024-06-20 17:33:03,458 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:33:03,458 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:33:03,459 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:33:03,459 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-06-20 17:33:03,459 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-20 17:33:03,459 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:33:03,459 INFO L85 PathProgramCache]: Analyzing trace with hash 1552024785, now seen corresponding path program 4 times [2024-06-20 17:33:03,459 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:33:03,460 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1875559194] [2024-06-20 17:33:03,460 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:33:03,460 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:33:03,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:33:06,358 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:33:06,358 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:33:06,359 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1875559194] [2024-06-20 17:33:06,359 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1875559194] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:33:06,359 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:33:06,359 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 17:33:06,359 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [532092240] [2024-06-20 17:33:06,359 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:33:06,359 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 17:33:06,359 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:33:06,360 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 17:33:06,360 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-20 17:33:06,442 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 54 [2024-06-20 17:33:06,442 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 111 places, 132 transitions, 1192 flow. Second operand has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:33:06,442 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:33:06,442 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 54 [2024-06-20 17:33:06,442 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:33:09,890 INFO L124 PetriNetUnfolderBase]: 10666/14787 cut-off events. [2024-06-20 17:33:09,890 INFO L125 PetriNetUnfolderBase]: For 192174/192227 co-relation queries the response was YES. [2024-06-20 17:33:09,931 INFO L83 FinitePrefix]: Finished finitePrefix Result has 70350 conditions, 14787 events. 10666/14787 cut-off events. For 192174/192227 co-relation queries the response was YES. Maximal size of possible extension queue 497. Compared 80438 event pairs, 4028 based on Foata normal form. 68/14853 useless extension candidates. Maximal degree in co-relation 70304. Up to 14228 conditions per place. [2024-06-20 17:33:09,986 INFO L140 encePairwiseOnDemand]: 42/54 looper letters, 168 selfloop transitions, 29 changer transitions 0/203 dead transitions. [2024-06-20 17:33:09,986 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 119 places, 203 transitions, 1805 flow [2024-06-20 17:33:09,987 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 17:33:09,987 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 17:33:09,988 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 222 transitions. [2024-06-20 17:33:09,988 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4567901234567901 [2024-06-20 17:33:09,988 INFO L175 Difference]: Start difference. First operand has 111 places, 132 transitions, 1192 flow. Second operand 9 states and 222 transitions. [2024-06-20 17:33:09,988 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 119 places, 203 transitions, 1805 flow [2024-06-20 17:33:10,154 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 115 places, 203 transitions, 1744 flow, removed 12 selfloop flow, removed 4 redundant places. [2024-06-20 17:33:10,156 INFO L231 Difference]: Finished difference. Result has 116 places, 134 transitions, 1243 flow [2024-06-20 17:33:10,156 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=1131, PETRI_DIFFERENCE_MINUEND_PLACES=107, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=132, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=103, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1243, PETRI_PLACES=116, PETRI_TRANSITIONS=134} [2024-06-20 17:33:10,156 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 59 predicate places. [2024-06-20 17:33:10,156 INFO L495 AbstractCegarLoop]: Abstraction has has 116 places, 134 transitions, 1243 flow [2024-06-20 17:33:10,156 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:33:10,156 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:33:10,156 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:33:10,157 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2024-06-20 17:33:10,157 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-20 17:33:10,157 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:33:10,157 INFO L85 PathProgramCache]: Analyzing trace with hash 1546662405, now seen corresponding path program 5 times [2024-06-20 17:33:10,157 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:33:10,157 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1686717766] [2024-06-20 17:33:10,157 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:33:10,157 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:33:10,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:33:13,102 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:33:13,103 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:33:13,103 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1686717766] [2024-06-20 17:33:13,103 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1686717766] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:33:13,103 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:33:13,103 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 17:33:13,103 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [469377260] [2024-06-20 17:33:13,103 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:33:13,104 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 17:33:13,104 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:33:13,104 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 17:33:13,105 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-20 17:33:13,181 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 54 [2024-06-20 17:33:13,181 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 116 places, 134 transitions, 1243 flow. Second operand has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:33:13,181 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:33:13,181 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 54 [2024-06-20 17:33:13,182 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:33:16,590 INFO L124 PetriNetUnfolderBase]: 10763/14950 cut-off events. [2024-06-20 17:33:16,591 INFO L125 PetriNetUnfolderBase]: For 210556/210592 co-relation queries the response was YES. [2024-06-20 17:33:16,634 INFO L83 FinitePrefix]: Finished finitePrefix Result has 72234 conditions, 14950 events. 10763/14950 cut-off events. For 210556/210592 co-relation queries the response was YES. Maximal size of possible extension queue 499. Compared 81474 event pairs, 4083 based on Foata normal form. 54/15000 useless extension candidates. Maximal degree in co-relation 72186. Up to 14379 conditions per place. [2024-06-20 17:33:16,694 INFO L140 encePairwiseOnDemand]: 42/54 looper letters, 152 selfloop transitions, 28 changer transitions 0/186 dead transitions. [2024-06-20 17:33:16,694 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 122 places, 186 transitions, 1780 flow [2024-06-20 17:33:16,695 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 17:33:16,696 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 17:33:16,696 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 177 transitions. [2024-06-20 17:33:16,696 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46825396825396826 [2024-06-20 17:33:16,697 INFO L175 Difference]: Start difference. First operand has 116 places, 134 transitions, 1243 flow. Second operand 7 states and 177 transitions. [2024-06-20 17:33:16,697 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 122 places, 186 transitions, 1780 flow [2024-06-20 17:33:16,865 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 115 places, 186 transitions, 1704 flow, removed 11 selfloop flow, removed 7 redundant places. [2024-06-20 17:33:16,867 INFO L231 Difference]: Finished difference. Result has 116 places, 136 transitions, 1281 flow [2024-06-20 17:33:16,867 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=1167, PETRI_DIFFERENCE_MINUEND_PLACES=109, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=134, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=106, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1281, PETRI_PLACES=116, PETRI_TRANSITIONS=136} [2024-06-20 17:33:16,868 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 59 predicate places. [2024-06-20 17:33:16,868 INFO L495 AbstractCegarLoop]: Abstraction has has 116 places, 136 transitions, 1281 flow [2024-06-20 17:33:16,868 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:33:16,868 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:33:16,868 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:33:16,868 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2024-06-20 17:33:16,868 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-20 17:33:16,869 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:33:16,869 INFO L85 PathProgramCache]: Analyzing trace with hash 1546514535, now seen corresponding path program 6 times [2024-06-20 17:33:16,869 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:33:16,869 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [551085621] [2024-06-20 17:33:16,869 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:33:16,869 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:33:16,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:33:19,770 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:33:19,770 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:33:19,770 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [551085621] [2024-06-20 17:33:19,770 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [551085621] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:33:19,771 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:33:19,771 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 17:33:19,771 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [96860143] [2024-06-20 17:33:19,771 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:33:19,771 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 17:33:19,772 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:33:19,772 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 17:33:19,772 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-20 17:33:19,794 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 54 [2024-06-20 17:33:19,794 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 116 places, 136 transitions, 1281 flow. Second operand has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:33:19,794 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:33:19,794 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 54 [2024-06-20 17:33:19,794 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:33:23,296 INFO L124 PetriNetUnfolderBase]: 10724/14893 cut-off events. [2024-06-20 17:33:23,296 INFO L125 PetriNetUnfolderBase]: For 224593/224629 co-relation queries the response was YES. [2024-06-20 17:33:23,333 INFO L83 FinitePrefix]: Finished finitePrefix Result has 72489 conditions, 14893 events. 10724/14893 cut-off events. For 224593/224629 co-relation queries the response was YES. Maximal size of possible extension queue 497. Compared 81123 event pairs, 3340 based on Foata normal form. 48/14937 useless extension candidates. Maximal degree in co-relation 72440. Up to 13894 conditions per place. [2024-06-20 17:33:23,387 INFO L140 encePairwiseOnDemand]: 42/54 looper letters, 149 selfloop transitions, 36 changer transitions 0/191 dead transitions. [2024-06-20 17:33:23,387 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 122 places, 191 transitions, 1816 flow [2024-06-20 17:33:23,389 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 17:33:23,389 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 17:33:23,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 180 transitions. [2024-06-20 17:33:23,389 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47619047619047616 [2024-06-20 17:33:23,389 INFO L175 Difference]: Start difference. First operand has 116 places, 136 transitions, 1281 flow. Second operand 7 states and 180 transitions. [2024-06-20 17:33:23,389 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 122 places, 191 transitions, 1816 flow [2024-06-20 17:33:23,573 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 117 places, 191 transitions, 1728 flow, removed 18 selfloop flow, removed 5 redundant places. [2024-06-20 17:33:23,576 INFO L231 Difference]: Finished difference. Result has 119 places, 138 transitions, 1313 flow [2024-06-20 17:33:23,576 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=1195, PETRI_DIFFERENCE_MINUEND_PLACES=111, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=136, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=101, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1313, PETRI_PLACES=119, PETRI_TRANSITIONS=138} [2024-06-20 17:33:23,577 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 62 predicate places. [2024-06-20 17:33:23,577 INFO L495 AbstractCegarLoop]: Abstraction has has 119 places, 138 transitions, 1313 flow [2024-06-20 17:33:23,577 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:33:23,577 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:33:23,577 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:33:23,577 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2024-06-20 17:33:23,577 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-20 17:33:23,578 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:33:23,578 INFO L85 PathProgramCache]: Analyzing trace with hash 1552239987, now seen corresponding path program 1 times [2024-06-20 17:33:23,578 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:33:23,578 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [334282007] [2024-06-20 17:33:23,578 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:33:23,578 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:33:23,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:33:26,462 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:33:26,462 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:33:26,462 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [334282007] [2024-06-20 17:33:26,462 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [334282007] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:33:26,462 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:33:26,462 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 17:33:26,462 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1458501056] [2024-06-20 17:33:26,462 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:33:26,463 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 17:33:26,463 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:33:26,463 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 17:33:26,464 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-20 17:33:26,511 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 54 [2024-06-20 17:33:26,512 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 119 places, 138 transitions, 1313 flow. Second operand has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:33:26,512 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:33:26,512 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 54 [2024-06-20 17:33:26,512 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:33:30,107 INFO L124 PetriNetUnfolderBase]: 10685/14844 cut-off events. [2024-06-20 17:33:30,108 INFO L125 PetriNetUnfolderBase]: For 238887/238940 co-relation queries the response was YES. [2024-06-20 17:33:30,161 INFO L83 FinitePrefix]: Finished finitePrefix Result has 72941 conditions, 14844 events. 10685/14844 cut-off events. For 238887/238940 co-relation queries the response was YES. Maximal size of possible extension queue 495. Compared 80844 event pairs, 3723 based on Foata normal form. 62/14904 useless extension candidates. Maximal degree in co-relation 72890. Up to 13833 conditions per place. [2024-06-20 17:33:30,221 INFO L140 encePairwiseOnDemand]: 42/54 looper letters, 170 selfloop transitions, 36 changer transitions 0/212 dead transitions. [2024-06-20 17:33:30,222 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 126 places, 212 transitions, 1908 flow [2024-06-20 17:33:30,225 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 17:33:30,225 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 17:33:30,226 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 224 transitions. [2024-06-20 17:33:30,226 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4609053497942387 [2024-06-20 17:33:30,226 INFO L175 Difference]: Start difference. First operand has 119 places, 138 transitions, 1313 flow. Second operand 9 states and 224 transitions. [2024-06-20 17:33:30,226 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 126 places, 212 transitions, 1908 flow [2024-06-20 17:33:30,486 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 120 places, 212 transitions, 1769 flow, removed 15 selfloop flow, removed 6 redundant places. [2024-06-20 17:33:30,489 INFO L231 Difference]: Finished difference. Result has 121 places, 139 transitions, 1247 flow [2024-06-20 17:33:30,489 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=1134, PETRI_DIFFERENCE_MINUEND_PLACES=112, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=137, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=101, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1247, PETRI_PLACES=121, PETRI_TRANSITIONS=139} [2024-06-20 17:33:30,490 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 64 predicate places. [2024-06-20 17:33:30,490 INFO L495 AbstractCegarLoop]: Abstraction has has 121 places, 139 transitions, 1247 flow [2024-06-20 17:33:30,490 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:33:30,490 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:33:30,491 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:33:30,491 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2024-06-20 17:33:30,491 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-20 17:33:30,491 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:33:30,491 INFO L85 PathProgramCache]: Analyzing trace with hash -970096969, now seen corresponding path program 1 times [2024-06-20 17:33:30,491 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:33:30,492 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [826470840] [2024-06-20 17:33:30,492 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:33:30,492 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:33:30,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:33:33,709 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:33:33,710 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:33:33,710 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [826470840] [2024-06-20 17:33:33,710 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [826470840] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:33:33,710 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:33:33,710 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 17:33:33,710 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [467228766] [2024-06-20 17:33:33,710 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:33:33,710 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 17:33:33,711 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:33:33,711 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 17:33:33,711 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-20 17:33:33,765 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 54 [2024-06-20 17:33:33,766 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 121 places, 139 transitions, 1247 flow. Second operand has 8 states, 8 states have (on average 14.0) internal successors, (112), 8 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:33:33,766 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:33:33,766 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 54 [2024-06-20 17:33:33,766 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:33:36,141 INFO L124 PetriNetUnfolderBase]: 8188/11597 cut-off events. [2024-06-20 17:33:36,141 INFO L125 PetriNetUnfolderBase]: For 207434/207441 co-relation queries the response was YES. [2024-06-20 17:33:36,176 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59378 conditions, 11597 events. 8188/11597 cut-off events. For 207434/207441 co-relation queries the response was YES. Maximal size of possible extension queue 435. Compared 65486 event pairs, 3388 based on Foata normal form. 9/11573 useless extension candidates. Maximal degree in co-relation 59327. Up to 11224 conditions per place. [2024-06-20 17:33:36,226 INFO L140 encePairwiseOnDemand]: 44/54 looper letters, 131 selfloop transitions, 22 changer transitions 0/166 dead transitions. [2024-06-20 17:33:36,226 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 126 places, 166 transitions, 1655 flow [2024-06-20 17:33:36,226 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-20 17:33:36,227 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-20 17:33:36,227 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 144 transitions. [2024-06-20 17:33:36,227 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4444444444444444 [2024-06-20 17:33:36,227 INFO L175 Difference]: Start difference. First operand has 121 places, 139 transitions, 1247 flow. Second operand 6 states and 144 transitions. [2024-06-20 17:33:36,227 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 126 places, 166 transitions, 1655 flow [2024-06-20 17:33:36,354 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 119 places, 166 transitions, 1568 flow, removed 9 selfloop flow, removed 7 redundant places. [2024-06-20 17:33:36,356 INFO L231 Difference]: Finished difference. Result has 120 places, 143 transitions, 1267 flow [2024-06-20 17:33:36,356 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=1160, PETRI_DIFFERENCE_MINUEND_PLACES=114, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=139, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=117, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1267, PETRI_PLACES=120, PETRI_TRANSITIONS=143} [2024-06-20 17:33:36,357 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 63 predicate places. [2024-06-20 17:33:36,357 INFO L495 AbstractCegarLoop]: Abstraction has has 120 places, 143 transitions, 1267 flow [2024-06-20 17:33:36,357 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 14.0) internal successors, (112), 8 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:33:36,357 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:33:36,357 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:33:36,357 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2024-06-20 17:33:36,357 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-20 17:33:36,358 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:33:36,358 INFO L85 PathProgramCache]: Analyzing trace with hash 414971117, now seen corresponding path program 1 times [2024-06-20 17:33:36,358 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:33:36,358 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1816624809] [2024-06-20 17:33:36,358 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:33:36,358 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:33:36,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:33:39,073 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:33:39,073 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:33:39,073 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1816624809] [2024-06-20 17:33:39,073 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1816624809] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:33:39,073 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:33:39,073 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 17:33:39,073 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1889104135] [2024-06-20 17:33:39,074 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:33:39,074 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 17:33:39,074 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:33:39,075 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 17:33:39,075 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-20 17:33:39,119 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 54 [2024-06-20 17:33:39,119 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 120 places, 143 transitions, 1267 flow. Second operand has 8 states, 8 states have (on average 13.0) internal successors, (104), 8 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:33:39,119 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:33:39,120 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 54 [2024-06-20 17:33:39,120 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:33:41,986 INFO L124 PetriNetUnfolderBase]: 8624/12073 cut-off events. [2024-06-20 17:33:41,986 INFO L125 PetriNetUnfolderBase]: For 225778/225804 co-relation queries the response was YES. [2024-06-20 17:33:42,026 INFO L83 FinitePrefix]: Finished finitePrefix Result has 63625 conditions, 12073 events. 8624/12073 cut-off events. For 225778/225804 co-relation queries the response was YES. Maximal size of possible extension queue 444. Compared 67199 event pairs, 3391 based on Foata normal form. 20/12091 useless extension candidates. Maximal degree in co-relation 63573. Up to 11819 conditions per place. [2024-06-20 17:33:42,078 INFO L140 encePairwiseOnDemand]: 44/54 looper letters, 147 selfloop transitions, 26 changer transitions 0/180 dead transitions. [2024-06-20 17:33:42,078 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 125 places, 180 transitions, 1883 flow [2024-06-20 17:33:42,079 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-20 17:33:42,079 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-20 17:33:42,079 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 147 transitions. [2024-06-20 17:33:42,079 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4537037037037037 [2024-06-20 17:33:42,079 INFO L175 Difference]: Start difference. First operand has 120 places, 143 transitions, 1267 flow. Second operand 6 states and 147 transitions. [2024-06-20 17:33:42,080 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 125 places, 180 transitions, 1883 flow [2024-06-20 17:33:42,257 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 121 places, 180 transitions, 1808 flow, removed 18 selfloop flow, removed 4 redundant places. [2024-06-20 17:33:42,259 INFO L231 Difference]: Finished difference. Result has 122 places, 151 transitions, 1373 flow [2024-06-20 17:33:42,259 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=1192, PETRI_DIFFERENCE_MINUEND_PLACES=116, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=143, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=121, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1373, PETRI_PLACES=122, PETRI_TRANSITIONS=151} [2024-06-20 17:33:42,259 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 65 predicate places. [2024-06-20 17:33:42,259 INFO L495 AbstractCegarLoop]: Abstraction has has 122 places, 151 transitions, 1373 flow [2024-06-20 17:33:42,260 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.0) internal successors, (104), 8 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:33:42,260 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:33:42,260 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:33:42,260 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2024-06-20 17:33:42,260 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-20 17:33:42,260 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:33:42,261 INFO L85 PathProgramCache]: Analyzing trace with hash 1255160393, now seen corresponding path program 2 times [2024-06-20 17:33:42,261 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:33:42,261 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1917978048] [2024-06-20 17:33:42,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:33:42,261 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:33:42,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:33:44,822 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:33:44,822 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:33:44,822 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1917978048] [2024-06-20 17:33:44,822 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1917978048] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:33:44,822 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:33:44,823 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 17:33:44,823 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [904048051] [2024-06-20 17:33:44,823 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:33:44,823 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 17:33:44,823 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:33:44,824 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 17:33:44,824 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-20 17:33:44,867 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 54 [2024-06-20 17:33:44,868 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 122 places, 151 transitions, 1373 flow. Second operand has 8 states, 8 states have (on average 13.0) internal successors, (104), 8 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:33:44,868 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:33:44,868 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 54 [2024-06-20 17:33:44,868 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:33:47,643 INFO L124 PetriNetUnfolderBase]: 8617/12064 cut-off events. [2024-06-20 17:33:47,643 INFO L125 PetriNetUnfolderBase]: For 250887/250915 co-relation queries the response was YES. [2024-06-20 17:33:47,673 INFO L83 FinitePrefix]: Finished finitePrefix Result has 66097 conditions, 12064 events. 8617/12064 cut-off events. For 250887/250915 co-relation queries the response was YES. Maximal size of possible extension queue 444. Compared 67144 event pairs, 3391 based on Foata normal form. 23/12085 useless extension candidates. Maximal degree in co-relation 66044. Up to 11823 conditions per place. [2024-06-20 17:33:47,717 INFO L140 encePairwiseOnDemand]: 44/54 looper letters, 144 selfloop transitions, 22 changer transitions 0/173 dead transitions. [2024-06-20 17:33:47,717 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 126 places, 173 transitions, 1759 flow [2024-06-20 17:33:47,718 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-20 17:33:47,718 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-20 17:33:47,718 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 125 transitions. [2024-06-20 17:33:47,718 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46296296296296297 [2024-06-20 17:33:47,719 INFO L175 Difference]: Start difference. First operand has 122 places, 151 transitions, 1373 flow. Second operand 5 states and 125 transitions. [2024-06-20 17:33:47,719 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 126 places, 173 transitions, 1759 flow [2024-06-20 17:33:47,905 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 124 places, 173 transitions, 1660 flow, removed 42 selfloop flow, removed 2 redundant places. [2024-06-20 17:33:47,907 INFO L231 Difference]: Finished difference. Result has 125 places, 151 transitions, 1332 flow [2024-06-20 17:33:47,907 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=1274, PETRI_DIFFERENCE_MINUEND_PLACES=120, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=151, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=129, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1332, PETRI_PLACES=125, PETRI_TRANSITIONS=151} [2024-06-20 17:33:47,907 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 68 predicate places. [2024-06-20 17:33:47,908 INFO L495 AbstractCegarLoop]: Abstraction has has 125 places, 151 transitions, 1332 flow [2024-06-20 17:33:47,908 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.0) internal successors, (104), 8 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:33:47,908 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:33:47,908 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:33:47,908 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2024-06-20 17:33:47,908 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-20 17:33:47,908 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:33:47,908 INFO L85 PathProgramCache]: Analyzing trace with hash 601290851, now seen corresponding path program 1 times [2024-06-20 17:33:47,908 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:33:47,908 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [54179756] [2024-06-20 17:33:47,909 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:33:47,909 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:33:47,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:33:52,204 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:33:52,204 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:33:52,204 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [54179756] [2024-06-20 17:33:52,204 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [54179756] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:33:52,204 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:33:52,204 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 17:33:52,204 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1371350598] [2024-06-20 17:33:52,204 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:33:52,204 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 17:33:52,205 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:33:52,205 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 17:33:52,205 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-20 17:33:52,297 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 54 [2024-06-20 17:33:52,297 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 125 places, 151 transitions, 1332 flow. Second operand has 9 states, 9 states have (on average 13.88888888888889) internal successors, (125), 9 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:33:52,297 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:33:52,297 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 54 [2024-06-20 17:33:52,297 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:33:55,116 INFO L124 PetriNetUnfolderBase]: 8179/11579 cut-off events. [2024-06-20 17:33:55,116 INFO L125 PetriNetUnfolderBase]: For 268624/268624 co-relation queries the response was YES. [2024-06-20 17:33:55,149 INFO L83 FinitePrefix]: Finished finitePrefix Result has 64595 conditions, 11579 events. 8179/11579 cut-off events. For 268624/268624 co-relation queries the response was YES. Maximal size of possible extension queue 435. Compared 65129 event pairs, 3318 based on Foata normal form. 8/11554 useless extension candidates. Maximal degree in co-relation 64540. Up to 11168 conditions per place. [2024-06-20 17:33:55,197 INFO L140 encePairwiseOnDemand]: 42/54 looper letters, 148 selfloop transitions, 28 changer transitions 0/189 dead transitions. [2024-06-20 17:33:55,197 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 133 places, 189 transitions, 1838 flow [2024-06-20 17:33:55,199 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 17:33:55,199 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 17:33:55,199 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 198 transitions. [2024-06-20 17:33:55,199 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4074074074074074 [2024-06-20 17:33:55,200 INFO L175 Difference]: Start difference. First operand has 125 places, 151 transitions, 1332 flow. Second operand 9 states and 198 transitions. [2024-06-20 17:33:55,200 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 133 places, 189 transitions, 1838 flow [2024-06-20 17:33:55,367 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 129 places, 189 transitions, 1792 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-06-20 17:33:55,370 INFO L231 Difference]: Finished difference. Result has 131 places, 156 transitions, 1435 flow [2024-06-20 17:33:55,370 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=1288, PETRI_DIFFERENCE_MINUEND_PLACES=121, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=151, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=124, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1435, PETRI_PLACES=131, PETRI_TRANSITIONS=156} [2024-06-20 17:33:55,370 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 74 predicate places. [2024-06-20 17:33:55,370 INFO L495 AbstractCegarLoop]: Abstraction has has 131 places, 156 transitions, 1435 flow [2024-06-20 17:33:55,370 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 13.88888888888889) internal successors, (125), 9 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:33:55,370 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:33:55,371 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:33:55,371 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2024-06-20 17:33:55,371 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-20 17:33:55,371 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:33:55,371 INFO L85 PathProgramCache]: Analyzing trace with hash 843341463, now seen corresponding path program 1 times [2024-06-20 17:33:55,371 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:33:55,371 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1230741997] [2024-06-20 17:33:55,371 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:33:55,371 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:33:55,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:33:58,310 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:33:58,311 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:33:58,312 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1230741997] [2024-06-20 17:33:58,312 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1230741997] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:33:58,312 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:33:58,312 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 17:33:58,312 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1576490487] [2024-06-20 17:33:58,312 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:33:58,313 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 17:33:58,313 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:33:58,313 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 17:33:58,313 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-20 17:33:58,364 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 54 [2024-06-20 17:33:58,364 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 131 places, 156 transitions, 1435 flow. Second operand has 9 states, 9 states have (on average 11.88888888888889) internal successors, (107), 9 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) [2024-06-20 17:33:58,364 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:33:58,364 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 54 [2024-06-20 17:33:58,365 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:34:01,669 INFO L124 PetriNetUnfolderBase]: 10671/14848 cut-off events. [2024-06-20 17:34:01,669 INFO L125 PetriNetUnfolderBase]: For 353683/353729 co-relation queries the response was YES. [2024-06-20 17:34:01,731 INFO L83 FinitePrefix]: Finished finitePrefix Result has 82565 conditions, 14848 events. 10671/14848 cut-off events. For 353683/353729 co-relation queries the response was YES. Maximal size of possible extension queue 486. Compared 80944 event pairs, 3850 based on Foata normal form. 39/14885 useless extension candidates. Maximal degree in co-relation 82508. Up to 14531 conditions per place. [2024-06-20 17:34:01,797 INFO L140 encePairwiseOnDemand]: 43/54 looper letters, 171 selfloop transitions, 25 changer transitions 0/202 dead transitions. [2024-06-20 17:34:01,797 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 137 places, 202 transitions, 2025 flow [2024-06-20 17:34:01,798 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 17:34:01,798 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 17:34:01,798 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 163 transitions. [2024-06-20 17:34:01,798 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4312169312169312 [2024-06-20 17:34:01,799 INFO L175 Difference]: Start difference. First operand has 131 places, 156 transitions, 1435 flow. Second operand 7 states and 163 transitions. [2024-06-20 17:34:01,799 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 137 places, 202 transitions, 2025 flow [2024-06-20 17:34:02,069 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 130 places, 202 transitions, 1903 flow, removed 28 selfloop flow, removed 7 redundant places. [2024-06-20 17:34:02,072 INFO L231 Difference]: Finished difference. Result has 132 places, 165 transitions, 1495 flow [2024-06-20 17:34:02,072 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=1315, PETRI_DIFFERENCE_MINUEND_PLACES=124, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=156, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=135, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1495, PETRI_PLACES=132, PETRI_TRANSITIONS=165} [2024-06-20 17:34:02,072 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 75 predicate places. [2024-06-20 17:34:02,072 INFO L495 AbstractCegarLoop]: Abstraction has has 132 places, 165 transitions, 1495 flow [2024-06-20 17:34:02,073 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.88888888888889) internal successors, (107), 9 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) [2024-06-20 17:34:02,073 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:34:02,073 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:34:02,073 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2024-06-20 17:34:02,073 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-20 17:34:02,073 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:34:02,073 INFO L85 PathProgramCache]: Analyzing trace with hash 749050513, now seen corresponding path program 2 times [2024-06-20 17:34:02,073 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:34:02,074 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1359759456] [2024-06-20 17:34:02,074 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:34:02,074 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:34:02,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:34:04,676 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:34:04,677 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:34:04,677 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1359759456] [2024-06-20 17:34:04,677 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1359759456] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:34:04,677 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:34:04,677 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 17:34:04,677 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1829780484] [2024-06-20 17:34:04,677 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:34:04,677 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 17:34:04,678 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:34:04,678 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 17:34:04,678 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-20 17:34:04,726 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 54 [2024-06-20 17:34:04,727 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 132 places, 165 transitions, 1495 flow. Second operand has 9 states, 9 states have (on average 11.88888888888889) internal successors, (107), 9 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) [2024-06-20 17:34:04,727 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:34:04,727 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 54 [2024-06-20 17:34:04,727 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:34:07,717 INFO L124 PetriNetUnfolderBase]: 10690/14866 cut-off events. [2024-06-20 17:34:07,718 INFO L125 PetriNetUnfolderBase]: For 380394/380427 co-relation queries the response was YES. [2024-06-20 17:34:07,775 INFO L83 FinitePrefix]: Finished finitePrefix Result has 85198 conditions, 14866 events. 10690/14866 cut-off events. For 380394/380427 co-relation queries the response was YES. Maximal size of possible extension queue 486. Compared 80759 event pairs, 3872 based on Foata normal form. 18/14882 useless extension candidates. Maximal degree in co-relation 85141. Up to 14504 conditions per place. [2024-06-20 17:34:07,840 INFO L140 encePairwiseOnDemand]: 44/54 looper letters, 166 selfloop transitions, 32 changer transitions 0/204 dead transitions. [2024-06-20 17:34:07,840 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 137 places, 204 transitions, 2195 flow [2024-06-20 17:34:07,841 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-20 17:34:07,841 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-20 17:34:07,842 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 140 transitions. [2024-06-20 17:34:07,842 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43209876543209874 [2024-06-20 17:34:07,842 INFO L175 Difference]: Start difference. First operand has 132 places, 165 transitions, 1495 flow. Second operand 6 states and 140 transitions. [2024-06-20 17:34:07,842 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 137 places, 204 transitions, 2195 flow [2024-06-20 17:34:08,118 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 133 places, 204 transitions, 2106 flow, removed 23 selfloop flow, removed 4 redundant places. [2024-06-20 17:34:08,120 INFO L231 Difference]: Finished difference. Result has 135 places, 176 transitions, 1635 flow [2024-06-20 17:34:08,121 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=1406, PETRI_DIFFERENCE_MINUEND_PLACES=128, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=165, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=137, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1635, PETRI_PLACES=135, PETRI_TRANSITIONS=176} [2024-06-20 17:34:08,121 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 78 predicate places. [2024-06-20 17:34:08,121 INFO L495 AbstractCegarLoop]: Abstraction has has 135 places, 176 transitions, 1635 flow [2024-06-20 17:34:08,121 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.88888888888889) internal successors, (107), 9 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) [2024-06-20 17:34:08,121 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:34:08,121 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:34:08,122 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2024-06-20 17:34:08,122 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-20 17:34:08,122 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:34:08,122 INFO L85 PathProgramCache]: Analyzing trace with hash 749039353, now seen corresponding path program 3 times [2024-06-20 17:34:08,122 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:34:08,122 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [46670538] [2024-06-20 17:34:08,122 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:34:08,122 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:34:08,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:34:10,554 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:34:10,554 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:34:10,554 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [46670538] [2024-06-20 17:34:10,554 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [46670538] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:34:10,554 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:34:10,554 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 17:34:10,555 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [398021450] [2024-06-20 17:34:10,555 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:34:10,555 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 17:34:10,555 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:34:10,555 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 17:34:10,555 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2024-06-20 17:34:10,601 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 54 [2024-06-20 17:34:10,603 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 135 places, 176 transitions, 1635 flow. Second operand has 9 states, 9 states have (on average 11.88888888888889) internal successors, (107), 9 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) [2024-06-20 17:34:10,603 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:34:10,604 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 54 [2024-06-20 17:34:10,604 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:34:13,917 INFO L124 PetriNetUnfolderBase]: 10683/14864 cut-off events. [2024-06-20 17:34:13,918 INFO L125 PetriNetUnfolderBase]: For 412649/412701 co-relation queries the response was YES. [2024-06-20 17:34:13,961 INFO L83 FinitePrefix]: Finished finitePrefix Result has 88247 conditions, 14864 events. 10683/14864 cut-off events. For 412649/412701 co-relation queries the response was YES. Maximal size of possible extension queue 486. Compared 80979 event pairs, 3850 based on Foata normal form. 46/14908 useless extension candidates. Maximal degree in co-relation 88188. Up to 14536 conditions per place. [2024-06-20 17:34:14,022 INFO L140 encePairwiseOnDemand]: 44/54 looper letters, 175 selfloop transitions, 28 changer transitions 0/209 dead transitions. [2024-06-20 17:34:14,022 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 140 places, 209 transitions, 2136 flow [2024-06-20 17:34:14,023 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-20 17:34:14,023 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-20 17:34:14,024 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 144 transitions. [2024-06-20 17:34:14,024 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4444444444444444 [2024-06-20 17:34:14,024 INFO L175 Difference]: Start difference. First operand has 135 places, 176 transitions, 1635 flow. Second operand 6 states and 144 transitions. [2024-06-20 17:34:14,024 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 140 places, 209 transitions, 2136 flow [2024-06-20 17:34:14,395 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 137 places, 209 transitions, 2010 flow, removed 46 selfloop flow, removed 3 redundant places. [2024-06-20 17:34:14,397 INFO L231 Difference]: Finished difference. Result has 138 places, 177 transitions, 1592 flow [2024-06-20 17:34:14,397 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=1513, PETRI_DIFFERENCE_MINUEND_PLACES=132, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=176, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=148, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1592, PETRI_PLACES=138, PETRI_TRANSITIONS=177} [2024-06-20 17:34:14,398 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 81 predicate places. [2024-06-20 17:34:14,398 INFO L495 AbstractCegarLoop]: Abstraction has has 138 places, 177 transitions, 1592 flow [2024-06-20 17:34:14,398 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.88888888888889) internal successors, (107), 9 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) [2024-06-20 17:34:14,398 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:34:14,398 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:34:14,398 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2024-06-20 17:34:14,399 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-20 17:34:14,399 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:34:14,399 INFO L85 PathProgramCache]: Analyzing trace with hash 2050712285, now seen corresponding path program 1 times [2024-06-20 17:34:14,399 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:34:14,399 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [821606506] [2024-06-20 17:34:14,400 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:34:14,400 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:34:14,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:34:17,116 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:34:17,117 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:34:17,117 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [821606506] [2024-06-20 17:34:17,117 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [821606506] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:34:17,117 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:34:17,117 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 17:34:17,117 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [516002919] [2024-06-20 17:34:17,117 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:34:17,117 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 17:34:17,117 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:34:17,118 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 17:34:17,118 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-20 17:34:17,180 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 54 [2024-06-20 17:34:17,181 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 138 places, 177 transitions, 1592 flow. Second operand has 9 states, 9 states have (on average 12.88888888888889) internal successors, (116), 9 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:34:17,181 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:34:17,181 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 54 [2024-06-20 17:34:17,181 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:34:19,968 INFO L124 PetriNetUnfolderBase]: 8662/12141 cut-off events. [2024-06-20 17:34:19,969 INFO L125 PetriNetUnfolderBase]: For 359988/360010 co-relation queries the response was YES. [2024-06-20 17:34:20,022 INFO L83 FinitePrefix]: Finished finitePrefix Result has 74404 conditions, 12141 events. 8662/12141 cut-off events. For 359988/360010 co-relation queries the response was YES. Maximal size of possible extension queue 444. Compared 67505 event pairs, 3347 based on Foata normal form. 21/12160 useless extension candidates. Maximal degree in co-relation 74344. Up to 11860 conditions per place. [2024-06-20 17:34:20,077 INFO L140 encePairwiseOnDemand]: 43/54 looper letters, 174 selfloop transitions, 31 changer transitions 0/212 dead transitions. [2024-06-20 17:34:20,077 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 144 places, 212 transitions, 2144 flow [2024-06-20 17:34:20,078 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 17:34:20,078 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 17:34:20,078 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 165 transitions. [2024-06-20 17:34:20,078 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4365079365079365 [2024-06-20 17:34:20,079 INFO L175 Difference]: Start difference. First operand has 138 places, 177 transitions, 1592 flow. Second operand 7 states and 165 transitions. [2024-06-20 17:34:20,079 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 144 places, 212 transitions, 2144 flow [2024-06-20 17:34:20,379 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 140 places, 212 transitions, 2092 flow, removed 3 selfloop flow, removed 4 redundant places. [2024-06-20 17:34:20,381 INFO L231 Difference]: Finished difference. Result has 141 places, 181 transitions, 1685 flow [2024-06-20 17:34:20,382 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=1540, PETRI_DIFFERENCE_MINUEND_PLACES=134, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=177, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=146, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1685, PETRI_PLACES=141, PETRI_TRANSITIONS=181} [2024-06-20 17:34:20,382 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 84 predicate places. [2024-06-20 17:34:20,382 INFO L495 AbstractCegarLoop]: Abstraction has has 141 places, 181 transitions, 1685 flow [2024-06-20 17:34:20,383 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.88888888888889) internal successors, (116), 9 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:34:20,383 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:34:20,383 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:34:20,383 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2024-06-20 17:34:20,383 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-20 17:34:20,384 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:34:20,384 INFO L85 PathProgramCache]: Analyzing trace with hash 255273995, now seen corresponding path program 2 times [2024-06-20 17:34:20,384 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:34:20,384 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [638069400] [2024-06-20 17:34:20,384 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:34:20,384 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:34:20,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:34:23,271 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:34:23,271 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:34:23,272 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [638069400] [2024-06-20 17:34:23,272 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [638069400] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:34:23,272 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:34:23,272 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 17:34:23,272 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2141566025] [2024-06-20 17:34:23,272 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:34:23,272 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 17:34:23,273 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:34:23,273 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 17:34:23,273 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-20 17:34:23,341 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 54 [2024-06-20 17:34:23,341 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 141 places, 181 transitions, 1685 flow. Second operand has 9 states, 9 states have (on average 12.88888888888889) internal successors, (116), 9 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:34:23,341 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:34:23,341 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 54 [2024-06-20 17:34:23,341 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:34:26,216 INFO L124 PetriNetUnfolderBase]: 8681/12166 cut-off events. [2024-06-20 17:34:26,217 INFO L125 PetriNetUnfolderBase]: For 392942/392964 co-relation queries the response was YES. [2024-06-20 17:34:26,256 INFO L83 FinitePrefix]: Finished finitePrefix Result has 77257 conditions, 12166 events. 8681/12166 cut-off events. For 392942/392964 co-relation queries the response was YES. Maximal size of possible extension queue 444. Compared 67837 event pairs, 3347 based on Foata normal form. 21/12185 useless extension candidates. Maximal degree in co-relation 77196. Up to 11855 conditions per place. [2024-06-20 17:34:26,307 INFO L140 encePairwiseOnDemand]: 43/54 looper letters, 177 selfloop transitions, 38 changer transitions 0/222 dead transitions. [2024-06-20 17:34:26,307 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 147 places, 222 transitions, 2459 flow [2024-06-20 17:34:26,308 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 17:34:26,308 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 17:34:26,308 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 169 transitions. [2024-06-20 17:34:26,308 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4470899470899471 [2024-06-20 17:34:26,309 INFO L175 Difference]: Start difference. First operand has 141 places, 181 transitions, 1685 flow. Second operand 7 states and 169 transitions. [2024-06-20 17:34:26,309 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 147 places, 222 transitions, 2459 flow [2024-06-20 17:34:26,543 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 142 places, 222 transitions, 2344 flow, removed 29 selfloop flow, removed 5 redundant places. [2024-06-20 17:34:26,545 INFO L231 Difference]: Finished difference. Result has 143 places, 189 transitions, 1811 flow [2024-06-20 17:34:26,546 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=1570, PETRI_DIFFERENCE_MINUEND_PLACES=136, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=181, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=147, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1811, PETRI_PLACES=143, PETRI_TRANSITIONS=189} [2024-06-20 17:34:26,546 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 86 predicate places. [2024-06-20 17:34:26,546 INFO L495 AbstractCegarLoop]: Abstraction has has 143 places, 189 transitions, 1811 flow [2024-06-20 17:34:26,546 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.88888888888889) internal successors, (116), 9 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:34:26,546 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:34:26,546 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:34:26,547 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2024-06-20 17:34:26,547 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-20 17:34:26,547 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:34:26,547 INFO L85 PathProgramCache]: Analyzing trace with hash 255268415, now seen corresponding path program 3 times [2024-06-20 17:34:26,547 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:34:26,547 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [865097994] [2024-06-20 17:34:26,547 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:34:26,547 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:34:26,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:34:29,196 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:34:29,196 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:34:29,197 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [865097994] [2024-06-20 17:34:29,197 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [865097994] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:34:29,197 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:34:29,197 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 17:34:29,197 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1792493762] [2024-06-20 17:34:29,197 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:34:29,197 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 17:34:29,197 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:34:29,198 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 17:34:29,198 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-20 17:34:29,258 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 54 [2024-06-20 17:34:29,259 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 143 places, 189 transitions, 1811 flow. Second operand has 9 states, 9 states have (on average 12.88888888888889) internal successors, (116), 9 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:34:29,259 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:34:29,259 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 54 [2024-06-20 17:34:29,259 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:34:32,022 INFO L124 PetriNetUnfolderBase]: 8674/12157 cut-off events. [2024-06-20 17:34:32,023 INFO L125 PetriNetUnfolderBase]: For 425463/425485 co-relation queries the response was YES. [2024-06-20 17:34:32,074 INFO L83 FinitePrefix]: Finished finitePrefix Result has 79694 conditions, 12157 events. 8674/12157 cut-off events. For 425463/425485 co-relation queries the response was YES. Maximal size of possible extension queue 444. Compared 67878 event pairs, 3347 based on Foata normal form. 21/12176 useless extension candidates. Maximal degree in co-relation 79632. Up to 11887 conditions per place. [2024-06-20 17:34:32,131 INFO L140 encePairwiseOnDemand]: 43/54 looper letters, 181 selfloop transitions, 27 changer transitions 0/215 dead transitions. [2024-06-20 17:34:32,132 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 148 places, 215 transitions, 2291 flow [2024-06-20 17:34:32,132 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-20 17:34:32,133 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-20 17:34:32,133 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 145 transitions. [2024-06-20 17:34:32,133 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44753086419753085 [2024-06-20 17:34:32,133 INFO L175 Difference]: Start difference. First operand has 143 places, 189 transitions, 1811 flow. Second operand 6 states and 145 transitions. [2024-06-20 17:34:32,133 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 148 places, 215 transitions, 2291 flow [2024-06-20 17:34:32,472 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 145 places, 215 transitions, 2147 flow, removed 59 selfloop flow, removed 3 redundant places. [2024-06-20 17:34:32,474 INFO L231 Difference]: Finished difference. Result has 146 places, 189 transitions, 1730 flow [2024-06-20 17:34:32,474 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=1667, PETRI_DIFFERENCE_MINUEND_PLACES=140, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=189, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=162, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1730, PETRI_PLACES=146, PETRI_TRANSITIONS=189} [2024-06-20 17:34:32,475 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 89 predicate places. [2024-06-20 17:34:32,475 INFO L495 AbstractCegarLoop]: Abstraction has has 146 places, 189 transitions, 1730 flow [2024-06-20 17:34:32,475 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.88888888888889) internal successors, (116), 9 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:34:32,475 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:34:32,475 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:34:32,476 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2024-06-20 17:34:32,476 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-20 17:34:32,476 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:34:32,476 INFO L85 PathProgramCache]: Analyzing trace with hash -1566302136, now seen corresponding path program 1 times [2024-06-20 17:34:32,476 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:34:32,477 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1417400603] [2024-06-20 17:34:32,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:34:32,477 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:34:32,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:34:35,007 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:34:35,007 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:34:35,007 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1417400603] [2024-06-20 17:34:35,007 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1417400603] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:34:35,008 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:34:35,008 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-20 17:34:35,008 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [137975541] [2024-06-20 17:34:35,008 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:34:35,008 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-20 17:34:35,009 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:34:35,009 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-20 17:34:35,009 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-20 17:34:35,066 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 54 [2024-06-20 17:34:35,067 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 146 places, 189 transitions, 1730 flow. Second operand has 6 states, 6 states have (on average 16.0) internal successors, (96), 6 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:34:35,067 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:34:35,067 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 54 [2024-06-20 17:34:35,067 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:34:37,776 INFO L124 PetriNetUnfolderBase]: 7900/11321 cut-off events. [2024-06-20 17:34:37,776 INFO L125 PetriNetUnfolderBase]: For 475349/475409 co-relation queries the response was YES. [2024-06-20 17:34:37,819 INFO L83 FinitePrefix]: Finished finitePrefix Result has 77824 conditions, 11321 events. 7900/11321 cut-off events. For 475349/475409 co-relation queries the response was YES. Maximal size of possible extension queue 448. Compared 65277 event pairs, 3171 based on Foata normal form. 4/11065 useless extension candidates. Maximal degree in co-relation 77760. Up to 10661 conditions per place. [2024-06-20 17:34:37,870 INFO L140 encePairwiseOnDemand]: 46/54 looper letters, 149 selfloop transitions, 19 changer transitions 0/206 dead transitions. [2024-06-20 17:34:37,871 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 150 places, 206 transitions, 2148 flow [2024-06-20 17:34:37,871 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-20 17:34:37,871 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-20 17:34:37,871 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 121 transitions. [2024-06-20 17:34:37,872 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44814814814814813 [2024-06-20 17:34:37,872 INFO L175 Difference]: Start difference. First operand has 146 places, 189 transitions, 1730 flow. Second operand 5 states and 121 transitions. [2024-06-20 17:34:37,872 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 150 places, 206 transitions, 2148 flow [2024-06-20 17:34:38,224 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 145 places, 206 transitions, 2071 flow, removed 7 selfloop flow, removed 5 redundant places. [2024-06-20 17:34:38,227 INFO L231 Difference]: Finished difference. Result has 146 places, 193 transitions, 1759 flow [2024-06-20 17:34:38,227 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=1653, PETRI_DIFFERENCE_MINUEND_PLACES=141, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=189, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=170, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1759, PETRI_PLACES=146, PETRI_TRANSITIONS=193} [2024-06-20 17:34:38,228 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 89 predicate places. [2024-06-20 17:34:38,228 INFO L495 AbstractCegarLoop]: Abstraction has has 146 places, 193 transitions, 1759 flow [2024-06-20 17:34:38,228 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 16.0) internal successors, (96), 6 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:34:38,228 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:34:38,228 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:34:38,229 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2024-06-20 17:34:38,229 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-20 17:34:38,229 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:34:38,229 INFO L85 PathProgramCache]: Analyzing trace with hash -7521746, now seen corresponding path program 1 times [2024-06-20 17:34:38,229 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:34:38,229 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [106013221] [2024-06-20 17:34:38,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:34:38,229 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:34:38,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:34:41,474 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:34:41,474 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:34:41,474 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [106013221] [2024-06-20 17:34:41,474 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [106013221] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:34:41,474 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:34:41,474 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 17:34:41,474 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2099125781] [2024-06-20 17:34:41,474 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:34:41,475 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 17:34:41,475 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:34:41,476 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 17:34:41,476 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-20 17:34:41,520 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 54 [2024-06-20 17:34:41,520 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 146 places, 193 transitions, 1759 flow. Second operand has 10 states, 10 states have (on average 11.8) internal successors, (118), 10 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:34:41,520 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:34:41,520 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 54 [2024-06-20 17:34:41,520 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:34:45,057 INFO L124 PetriNetUnfolderBase]: 10732/14949 cut-off events. [2024-06-20 17:34:45,058 INFO L125 PetriNetUnfolderBase]: For 565615/565659 co-relation queries the response was YES. [2024-06-20 17:34:45,112 INFO L83 FinitePrefix]: Finished finitePrefix Result has 98282 conditions, 14949 events. 10732/14949 cut-off events. For 565615/565659 co-relation queries the response was YES. Maximal size of possible extension queue 486. Compared 81589 event pairs, 3788 based on Foata normal form. 41/14988 useless extension candidates. Maximal degree in co-relation 98217. Up to 14603 conditions per place. [2024-06-20 17:34:45,178 INFO L140 encePairwiseOnDemand]: 42/54 looper letters, 204 selfloop transitions, 29 changer transitions 0/239 dead transitions. [2024-06-20 17:34:45,179 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 153 places, 239 transitions, 2395 flow [2024-06-20 17:34:45,180 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 17:34:45,180 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 17:34:45,184 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 182 transitions. [2024-06-20 17:34:45,184 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4212962962962963 [2024-06-20 17:34:45,184 INFO L175 Difference]: Start difference. First operand has 146 places, 193 transitions, 1759 flow. Second operand 8 states and 182 transitions. [2024-06-20 17:34:45,184 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 153 places, 239 transitions, 2395 flow [2024-06-20 17:34:45,547 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 150 places, 239 transitions, 2327 flow, removed 19 selfloop flow, removed 3 redundant places. [2024-06-20 17:34:45,550 INFO L231 Difference]: Finished difference. Result has 151 places, 197 transitions, 1828 flow [2024-06-20 17:34:45,550 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=1691, PETRI_DIFFERENCE_MINUEND_PLACES=143, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=193, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=164, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1828, PETRI_PLACES=151, PETRI_TRANSITIONS=197} [2024-06-20 17:34:45,551 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 94 predicate places. [2024-06-20 17:34:45,551 INFO L495 AbstractCegarLoop]: Abstraction has has 151 places, 197 transitions, 1828 flow [2024-06-20 17:34:45,551 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.8) internal successors, (118), 10 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:34:45,551 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:34:45,552 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:34:45,552 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2024-06-20 17:34:45,552 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-20 17:34:45,552 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:34:45,552 INFO L85 PathProgramCache]: Analyzing trace with hash 1745743440, now seen corresponding path program 2 times [2024-06-20 17:34:45,552 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:34:45,553 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [27121858] [2024-06-20 17:34:45,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:34:45,553 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:34:45,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:34:48,770 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:34:48,770 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:34:48,771 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [27121858] [2024-06-20 17:34:48,771 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [27121858] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:34:48,771 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:34:48,771 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 17:34:48,771 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [39660753] [2024-06-20 17:34:48,771 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:34:48,771 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 17:34:48,771 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:34:48,772 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 17:34:48,772 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-20 17:34:48,872 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 54 [2024-06-20 17:34:48,872 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 151 places, 197 transitions, 1828 flow. Second operand has 10 states, 10 states have (on average 11.8) internal successors, (118), 10 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:34:48,872 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:34:48,873 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 54 [2024-06-20 17:34:48,873 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:34:52,341 INFO L124 PetriNetUnfolderBase]: 10751/14967 cut-off events. [2024-06-20 17:34:52,342 INFO L125 PetriNetUnfolderBase]: For 601255/601285 co-relation queries the response was YES. [2024-06-20 17:34:52,398 INFO L83 FinitePrefix]: Finished finitePrefix Result has 101389 conditions, 14967 events. 10751/14967 cut-off events. For 601255/601285 co-relation queries the response was YES. Maximal size of possible extension queue 486. Compared 81612 event pairs, 3810 based on Foata normal form. 18/14983 useless extension candidates. Maximal degree in co-relation 101323. Up to 14520 conditions per place. [2024-06-20 17:34:52,471 INFO L140 encePairwiseOnDemand]: 43/54 looper letters, 193 selfloop transitions, 48 changer transitions 0/247 dead transitions. [2024-06-20 17:34:52,471 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 158 places, 247 transitions, 2694 flow [2024-06-20 17:34:52,472 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 17:34:52,473 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 17:34:52,473 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 180 transitions. [2024-06-20 17:34:52,473 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4166666666666667 [2024-06-20 17:34:52,473 INFO L175 Difference]: Start difference. First operand has 151 places, 197 transitions, 1828 flow. Second operand 8 states and 180 transitions. [2024-06-20 17:34:52,474 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 158 places, 247 transitions, 2694 flow [2024-06-20 17:34:52,810 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 152 places, 247 transitions, 2587 flow, removed 27 selfloop flow, removed 6 redundant places. [2024-06-20 17:34:52,813 INFO L231 Difference]: Finished difference. Result has 154 places, 208 transitions, 2011 flow [2024-06-20 17:34:52,813 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=1721, PETRI_DIFFERENCE_MINUEND_PLACES=145, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=197, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=153, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2011, PETRI_PLACES=154, PETRI_TRANSITIONS=208} [2024-06-20 17:34:52,813 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 97 predicate places. [2024-06-20 17:34:52,814 INFO L495 AbstractCegarLoop]: Abstraction has has 154 places, 208 transitions, 2011 flow [2024-06-20 17:34:52,814 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.8) internal successors, (118), 10 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:34:52,814 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:34:52,814 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:34:52,814 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2024-06-20 17:34:52,814 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-20 17:34:52,814 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:34:52,814 INFO L85 PathProgramCache]: Analyzing trace with hash 1745385390, now seen corresponding path program 3 times [2024-06-20 17:34:52,814 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:34:52,814 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1862067775] [2024-06-20 17:34:52,815 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:34:52,815 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:34:52,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:34:56,088 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:34:56,089 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:34:56,089 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1862067775] [2024-06-20 17:34:56,089 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1862067775] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:34:56,089 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:34:56,089 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 17:34:56,089 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [863486820] [2024-06-20 17:34:56,089 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:34:56,089 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 17:34:56,089 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:34:56,090 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 17:34:56,090 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-20 17:34:56,147 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 54 [2024-06-20 17:34:56,147 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 154 places, 208 transitions, 2011 flow. Second operand has 10 states, 10 states have (on average 11.8) internal successors, (118), 10 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:34:56,147 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:34:56,147 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 54 [2024-06-20 17:34:56,147 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:34:59,816 INFO L124 PetriNetUnfolderBase]: 10744/14965 cut-off events. [2024-06-20 17:34:59,817 INFO L125 PetriNetUnfolderBase]: For 640964/641008 co-relation queries the response was YES. [2024-06-20 17:34:59,870 INFO L83 FinitePrefix]: Finished finitePrefix Result has 104416 conditions, 14965 events. 10744/14965 cut-off events. For 640964/641008 co-relation queries the response was YES. Maximal size of possible extension queue 486. Compared 81721 event pairs, 3788 based on Foata normal form. 41/15004 useless extension candidates. Maximal degree in co-relation 104348. Up to 14597 conditions per place. [2024-06-20 17:34:59,939 INFO L140 encePairwiseOnDemand]: 43/54 looper letters, 204 selfloop transitions, 36 changer transitions 0/246 dead transitions. [2024-06-20 17:34:59,939 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 160 places, 246 transitions, 2600 flow [2024-06-20 17:34:59,940 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 17:34:59,940 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 17:34:59,941 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 163 transitions. [2024-06-20 17:34:59,941 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4312169312169312 [2024-06-20 17:34:59,941 INFO L175 Difference]: Start difference. First operand has 154 places, 208 transitions, 2011 flow. Second operand 7 states and 163 transitions. [2024-06-20 17:34:59,941 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 160 places, 246 transitions, 2600 flow [2024-06-20 17:35:00,486 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 156 places, 246 transitions, 2442 flow, removed 60 selfloop flow, removed 4 redundant places. [2024-06-20 17:35:00,489 INFO L231 Difference]: Finished difference. Result has 157 places, 209 transitions, 1954 flow [2024-06-20 17:35:00,489 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=1859, PETRI_DIFFERENCE_MINUEND_PLACES=150, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=208, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=172, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1954, PETRI_PLACES=157, PETRI_TRANSITIONS=209} [2024-06-20 17:35:00,489 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 100 predicate places. [2024-06-20 17:35:00,490 INFO L495 AbstractCegarLoop]: Abstraction has has 157 places, 209 transitions, 1954 flow [2024-06-20 17:35:00,490 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.8) internal successors, (118), 10 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:35:00,490 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:35:00,490 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:35:00,490 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2024-06-20 17:35:00,490 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-20 17:35:00,490 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:35:00,490 INFO L85 PathProgramCache]: Analyzing trace with hash -1750578092, now seen corresponding path program 1 times [2024-06-20 17:35:00,490 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:35:00,490 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1721674181] [2024-06-20 17:35:00,490 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:35:00,491 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:35:00,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:35:03,871 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:35:03,871 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:35:03,871 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1721674181] [2024-06-20 17:35:03,871 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1721674181] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:35:03,871 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:35:03,871 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 17:35:03,871 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [802647555] [2024-06-20 17:35:03,872 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:35:03,872 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 17:35:03,872 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:35:03,872 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 17:35:03,872 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-20 17:35:03,929 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 54 [2024-06-20 17:35:03,930 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 157 places, 209 transitions, 1954 flow. Second operand has 9 states, 9 states have (on average 12.88888888888889) internal successors, (116), 9 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:35:03,930 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:35:03,930 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 54 [2024-06-20 17:35:03,930 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:35:07,003 INFO L124 PetriNetUnfolderBase]: 8721/12238 cut-off events. [2024-06-20 17:35:07,003 INFO L125 PetriNetUnfolderBase]: For 560457/560476 co-relation queries the response was YES. [2024-06-20 17:35:07,046 INFO L83 FinitePrefix]: Finished finitePrefix Result has 89086 conditions, 12238 events. 8721/12238 cut-off events. For 560457/560476 co-relation queries the response was YES. Maximal size of possible extension queue 444. Compared 68188 event pairs, 3131 based on Foata normal form. 20/12256 useless extension candidates. Maximal degree in co-relation 89016. Up to 11852 conditions per place. [2024-06-20 17:35:07,104 INFO L140 encePairwiseOnDemand]: 44/54 looper letters, 212 selfloop transitions, 35 changer transitions 0/254 dead transitions. [2024-06-20 17:35:07,104 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 163 places, 254 transitions, 2840 flow [2024-06-20 17:35:07,105 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 17:35:07,105 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 17:35:07,106 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 172 transitions. [2024-06-20 17:35:07,106 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.455026455026455 [2024-06-20 17:35:07,106 INFO L175 Difference]: Start difference. First operand has 157 places, 209 transitions, 1954 flow. Second operand 7 states and 172 transitions. [2024-06-20 17:35:07,106 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 163 places, 254 transitions, 2840 flow [2024-06-20 17:35:07,632 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 158 places, 254 transitions, 2772 flow, removed 3 selfloop flow, removed 5 redundant places. [2024-06-20 17:35:07,635 INFO L231 Difference]: Finished difference. Result has 159 places, 215 transitions, 2130 flow [2024-06-20 17:35:07,635 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=1886, PETRI_DIFFERENCE_MINUEND_PLACES=152, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=209, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=177, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2130, PETRI_PLACES=159, PETRI_TRANSITIONS=215} [2024-06-20 17:35:07,636 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 102 predicate places. [2024-06-20 17:35:07,636 INFO L495 AbstractCegarLoop]: Abstraction has has 159 places, 215 transitions, 2130 flow [2024-06-20 17:35:07,636 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.88888888888889) internal successors, (116), 9 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:35:07,636 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:35:07,636 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:35:07,636 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2024-06-20 17:35:07,636 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-20 17:35:07,637 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:35:07,637 INFO L85 PathProgramCache]: Analyzing trace with hash 2037039560, now seen corresponding path program 2 times [2024-06-20 17:35:07,637 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:35:07,637 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [191365175] [2024-06-20 17:35:07,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:35:07,637 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:35:07,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:35:10,656 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:35:10,656 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:35:10,656 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [191365175] [2024-06-20 17:35:10,656 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [191365175] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:35:10,656 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:35:10,656 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 17:35:10,656 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [337104987] [2024-06-20 17:35:10,657 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:35:10,657 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 17:35:10,657 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:35:10,657 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 17:35:10,657 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-20 17:35:10,719 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 54 [2024-06-20 17:35:10,720 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 159 places, 215 transitions, 2130 flow. Second operand has 9 states, 9 states have (on average 12.88888888888889) internal successors, (116), 9 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:35:10,720 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:35:10,720 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 54 [2024-06-20 17:35:10,720 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:35:14,347 INFO L124 PetriNetUnfolderBase]: 8753/12282 cut-off events. [2024-06-20 17:35:14,347 INFO L125 PetriNetUnfolderBase]: For 598956/598975 co-relation queries the response was YES. [2024-06-20 17:35:14,387 INFO L83 FinitePrefix]: Finished finitePrefix Result has 91447 conditions, 12282 events. 8753/12282 cut-off events. For 598956/598975 co-relation queries the response was YES. Maximal size of possible extension queue 444. Compared 68386 event pairs, 3289 based on Foata normal form. 20/12300 useless extension candidates. Maximal degree in co-relation 91376. Up to 11974 conditions per place. [2024-06-20 17:35:14,453 INFO L140 encePairwiseOnDemand]: 44/54 looper letters, 213 selfloop transitions, 30 changer transitions 0/250 dead transitions. [2024-06-20 17:35:14,453 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 165 places, 250 transitions, 2780 flow [2024-06-20 17:35:14,454 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 17:35:14,454 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 17:35:14,454 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 165 transitions. [2024-06-20 17:35:14,454 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4365079365079365 [2024-06-20 17:35:14,455 INFO L175 Difference]: Start difference. First operand has 159 places, 215 transitions, 2130 flow. Second operand 7 states and 165 transitions. [2024-06-20 17:35:14,455 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 165 places, 250 transitions, 2780 flow [2024-06-20 17:35:14,800 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 162 places, 250 transitions, 2625 flow, removed 63 selfloop flow, removed 3 redundant places. [2024-06-20 17:35:14,803 INFO L231 Difference]: Finished difference. Result has 163 places, 218 transitions, 2135 flow [2024-06-20 17:35:14,803 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=2001, PETRI_DIFFERENCE_MINUEND_PLACES=156, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=215, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=185, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2135, PETRI_PLACES=163, PETRI_TRANSITIONS=218} [2024-06-20 17:35:14,803 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 106 predicate places. [2024-06-20 17:35:14,804 INFO L495 AbstractCegarLoop]: Abstraction has has 163 places, 218 transitions, 2135 flow [2024-06-20 17:35:14,804 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.88888888888889) internal successors, (116), 9 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:35:14,804 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:35:14,804 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:35:14,804 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2024-06-20 17:35:14,804 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-20 17:35:14,805 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:35:14,805 INFO L85 PathProgramCache]: Analyzing trace with hash 2037044520, now seen corresponding path program 1 times [2024-06-20 17:35:14,805 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:35:14,805 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [604737476] [2024-06-20 17:35:14,805 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:35:14,805 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:35:14,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:35:18,334 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:35:18,334 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:35:18,334 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [604737476] [2024-06-20 17:35:18,334 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [604737476] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:35:18,334 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:35:18,334 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 17:35:18,334 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1252257732] [2024-06-20 17:35:18,334 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:35:18,335 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 17:35:18,335 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:35:18,335 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 17:35:18,335 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-20 17:35:18,396 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 54 [2024-06-20 17:35:18,396 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 163 places, 218 transitions, 2135 flow. Second operand has 10 states, 10 states have (on average 12.8) internal successors, (128), 10 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:35:18,396 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:35:18,396 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 54 [2024-06-20 17:35:18,396 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:35:21,677 INFO L124 PetriNetUnfolderBase]: 8772/12313 cut-off events. [2024-06-20 17:35:21,678 INFO L125 PetriNetUnfolderBase]: For 624827/624846 co-relation queries the response was YES. [2024-06-20 17:35:21,719 INFO L83 FinitePrefix]: Finished finitePrefix Result has 92133 conditions, 12313 events. 8772/12313 cut-off events. For 624827/624846 co-relation queries the response was YES. Maximal size of possible extension queue 444. Compared 68698 event pairs, 3271 based on Foata normal form. 18/12329 useless extension candidates. Maximal degree in co-relation 92060. Up to 11999 conditions per place. [2024-06-20 17:35:21,778 INFO L140 encePairwiseOnDemand]: 42/54 looper letters, 216 selfloop transitions, 35 changer transitions 0/258 dead transitions. [2024-06-20 17:35:21,778 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 170 places, 258 transitions, 2813 flow [2024-06-20 17:35:21,779 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 17:35:21,780 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 17:35:21,780 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 185 transitions. [2024-06-20 17:35:21,780 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42824074074074076 [2024-06-20 17:35:21,780 INFO L175 Difference]: Start difference. First operand has 163 places, 218 transitions, 2135 flow. Second operand 8 states and 185 transitions. [2024-06-20 17:35:21,780 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 170 places, 258 transitions, 2813 flow [2024-06-20 17:35:22,213 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 165 places, 258 transitions, 2709 flow, removed 24 selfloop flow, removed 5 redundant places. [2024-06-20 17:35:22,216 INFO L231 Difference]: Finished difference. Result has 166 places, 222 transitions, 2206 flow [2024-06-20 17:35:22,216 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=2031, PETRI_DIFFERENCE_MINUEND_PLACES=158, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=218, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=183, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2206, PETRI_PLACES=166, PETRI_TRANSITIONS=222} [2024-06-20 17:35:22,216 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 109 predicate places. [2024-06-20 17:35:22,216 INFO L495 AbstractCegarLoop]: Abstraction has has 166 places, 222 transitions, 2206 flow [2024-06-20 17:35:22,216 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.8) internal successors, (128), 10 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:35:22,216 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:35:22,217 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:35:22,217 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2024-06-20 17:35:22,217 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-20 17:35:22,217 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:35:22,217 INFO L85 PathProgramCache]: Analyzing trace with hash -676616760, now seen corresponding path program 3 times [2024-06-20 17:35:22,217 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:35:22,217 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [262874312] [2024-06-20 17:35:22,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:35:22,217 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:35:22,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:35:25,300 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:35:25,300 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:35:25,300 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [262874312] [2024-06-20 17:35:25,300 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [262874312] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:35:25,300 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:35:25,300 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 17:35:25,300 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1904166939] [2024-06-20 17:35:25,300 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:35:25,301 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 17:35:25,301 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:35:25,301 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 17:35:25,301 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-20 17:35:25,373 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 54 [2024-06-20 17:35:25,373 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 166 places, 222 transitions, 2206 flow. Second operand has 9 states, 9 states have (on average 12.88888888888889) internal successors, (116), 9 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:35:25,373 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:35:25,373 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 54 [2024-06-20 17:35:25,373 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:35:28,666 INFO L124 PetriNetUnfolderBase]: 8760/12291 cut-off events. [2024-06-20 17:35:28,666 INFO L125 PetriNetUnfolderBase]: For 659436/659455 co-relation queries the response was YES. [2024-06-20 17:35:28,708 INFO L83 FinitePrefix]: Finished finitePrefix Result has 94276 conditions, 12291 events. 8760/12291 cut-off events. For 659436/659455 co-relation queries the response was YES. Maximal size of possible extension queue 443. Compared 68598 event pairs, 3111 based on Foata normal form. 20/12309 useless extension candidates. Maximal degree in co-relation 94202. Up to 11956 conditions per place. [2024-06-20 17:35:28,766 INFO L140 encePairwiseOnDemand]: 44/54 looper letters, 217 selfloop transitions, 29 changer transitions 0/253 dead transitions. [2024-06-20 17:35:28,766 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 171 places, 253 transitions, 2774 flow [2024-06-20 17:35:28,767 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-20 17:35:28,767 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-20 17:35:28,768 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 150 transitions. [2024-06-20 17:35:28,768 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46296296296296297 [2024-06-20 17:35:28,768 INFO L175 Difference]: Start difference. First operand has 166 places, 222 transitions, 2206 flow. Second operand 6 states and 150 transitions. [2024-06-20 17:35:28,768 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 171 places, 253 transitions, 2774 flow [2024-06-20 17:35:29,262 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 165 places, 253 transitions, 2585 flow, removed 62 selfloop flow, removed 6 redundant places. [2024-06-20 17:35:29,265 INFO L231 Difference]: Finished difference. Result has 166 places, 222 transitions, 2087 flow [2024-06-20 17:35:29,265 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=2017, PETRI_DIFFERENCE_MINUEND_PLACES=160, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=222, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=193, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2087, PETRI_PLACES=166, PETRI_TRANSITIONS=222} [2024-06-20 17:35:29,266 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 109 predicate places. [2024-06-20 17:35:29,266 INFO L495 AbstractCegarLoop]: Abstraction has has 166 places, 222 transitions, 2087 flow [2024-06-20 17:35:29,266 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.88888888888889) internal successors, (116), 9 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:35:29,266 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:35:29,266 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:35:29,266 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2024-06-20 17:35:29,267 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-20 17:35:29,267 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:35:29,267 INFO L85 PathProgramCache]: Analyzing trace with hash -676611800, now seen corresponding path program 2 times [2024-06-20 17:35:29,267 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:35:29,267 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [872652788] [2024-06-20 17:35:29,267 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:35:29,268 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:35:29,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:35:32,666 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:35:32,666 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:35:32,667 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [872652788] [2024-06-20 17:35:32,667 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [872652788] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:35:32,667 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:35:32,667 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 17:35:32,667 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [882635742] [2024-06-20 17:35:32,667 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:35:32,667 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 17:35:32,667 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:35:32,668 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 17:35:32,668 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-20 17:35:32,722 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 54 [2024-06-20 17:35:32,723 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 166 places, 222 transitions, 2087 flow. Second operand has 10 states, 10 states have (on average 12.8) internal successors, (128), 10 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:35:32,723 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:35:32,723 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 54 [2024-06-20 17:35:32,723 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:35:36,035 INFO L124 PetriNetUnfolderBase]: 8779/12312 cut-off events. [2024-06-20 17:35:36,035 INFO L125 PetriNetUnfolderBase]: For 686628/686647 co-relation queries the response was YES. [2024-06-20 17:35:36,078 INFO L83 FinitePrefix]: Finished finitePrefix Result has 94995 conditions, 12312 events. 8779/12312 cut-off events. For 686628/686647 co-relation queries the response was YES. Maximal size of possible extension queue 443. Compared 68692 event pairs, 3269 based on Foata normal form. 18/12328 useless extension candidates. Maximal degree in co-relation 94920. Up to 12019 conditions per place. [2024-06-20 17:35:36,136 INFO L140 encePairwiseOnDemand]: 42/54 looper letters, 219 selfloop transitions, 31 changer transitions 0/257 dead transitions. [2024-06-20 17:35:36,136 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 172 places, 257 transitions, 2759 flow [2024-06-20 17:35:36,137 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 17:35:36,137 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 17:35:36,137 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 165 transitions. [2024-06-20 17:35:36,138 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4365079365079365 [2024-06-20 17:35:36,138 INFO L175 Difference]: Start difference. First operand has 166 places, 222 transitions, 2087 flow. Second operand 7 states and 165 transitions. [2024-06-20 17:35:36,138 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 172 places, 257 transitions, 2759 flow [2024-06-20 17:35:36,474 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 167 places, 257 transitions, 2691 flow, removed 3 selfloop flow, removed 5 redundant places. [2024-06-20 17:35:36,477 INFO L231 Difference]: Finished difference. Result has 168 places, 226 transitions, 2194 flow [2024-06-20 17:35:36,477 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=2019, PETRI_DIFFERENCE_MINUEND_PLACES=161, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=222, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=191, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2194, PETRI_PLACES=168, PETRI_TRANSITIONS=226} [2024-06-20 17:35:36,478 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 111 predicate places. [2024-06-20 17:35:36,478 INFO L495 AbstractCegarLoop]: Abstraction has has 168 places, 226 transitions, 2194 flow [2024-06-20 17:35:36,479 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.8) internal successors, (128), 10 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:35:36,479 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:35:36,479 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:35:36,479 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2024-06-20 17:35:36,479 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-20 17:35:36,479 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:35:36,480 INFO L85 PathProgramCache]: Analyzing trace with hash -676432310, now seen corresponding path program 3 times [2024-06-20 17:35:36,480 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:35:36,480 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [344355796] [2024-06-20 17:35:36,480 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:35:36,480 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:35:36,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:35:40,371 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:35:40,371 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:35:40,371 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [344355796] [2024-06-20 17:35:40,371 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [344355796] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:35:40,371 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:35:40,371 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 17:35:40,372 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [628011446] [2024-06-20 17:35:40,372 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:35:40,372 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 17:35:40,372 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:35:40,372 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 17:35:40,373 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-20 17:35:40,457 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 54 [2024-06-20 17:35:40,458 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 168 places, 226 transitions, 2194 flow. Second operand has 10 states, 10 states have (on average 12.8) internal successors, (128), 10 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:35:40,458 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:35:40,458 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 54 [2024-06-20 17:35:40,458 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:35:44,425 INFO L124 PetriNetUnfolderBase]: 8931/12537 cut-off events. [2024-06-20 17:35:44,426 INFO L125 PetriNetUnfolderBase]: For 728649/728655 co-relation queries the response was YES. [2024-06-20 17:35:44,470 INFO L83 FinitePrefix]: Finished finitePrefix Result has 98845 conditions, 12537 events. 8931/12537 cut-off events. For 728649/728655 co-relation queries the response was YES. Maximal size of possible extension queue 443. Compared 70026 event pairs, 3249 based on Foata normal form. 8/12543 useless extension candidates. Maximal degree in co-relation 98769. Up to 12183 conditions per place. [2024-06-20 17:35:44,540 INFO L140 encePairwiseOnDemand]: 40/54 looper letters, 253 selfloop transitions, 50 changer transitions 0/310 dead transitions. [2024-06-20 17:35:44,540 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 179 places, 310 transitions, 3346 flow [2024-06-20 17:35:44,541 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-20 17:35:44,541 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-20 17:35:44,542 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 258 transitions. [2024-06-20 17:35:44,542 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39814814814814814 [2024-06-20 17:35:44,542 INFO L175 Difference]: Start difference. First operand has 168 places, 226 transitions, 2194 flow. Second operand 12 states and 258 transitions. [2024-06-20 17:35:44,542 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 179 places, 310 transitions, 3346 flow [2024-06-20 17:35:44,952 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 174 places, 310 transitions, 3086 flow, removed 88 selfloop flow, removed 5 redundant places. [2024-06-20 17:35:44,955 INFO L231 Difference]: Finished difference. Result has 180 places, 259 transitions, 2563 flow [2024-06-20 17:35:44,956 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=2049, PETRI_DIFFERENCE_MINUEND_PLACES=163, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=226, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=180, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=2563, PETRI_PLACES=180, PETRI_TRANSITIONS=259} [2024-06-20 17:35:44,956 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 123 predicate places. [2024-06-20 17:35:44,956 INFO L495 AbstractCegarLoop]: Abstraction has has 180 places, 259 transitions, 2563 flow [2024-06-20 17:35:44,956 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.8) internal successors, (128), 10 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:35:44,956 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:35:44,956 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:35:44,957 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2024-06-20 17:35:44,957 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-20 17:35:44,957 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:35:44,957 INFO L85 PathProgramCache]: Analyzing trace with hash 2078470636, now seen corresponding path program 4 times [2024-06-20 17:35:44,957 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:35:44,957 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [254826910] [2024-06-20 17:35:44,957 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:35:44,957 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:35:44,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat