./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/pthread-wmm/mix015.oepc.i --full-output --witness-type correctness_witness --witnessparser.only.consider.loop.invariants false --cacsl2boogietranslator.check.unreachability.of.reach_error.function false --validate ./goblint.2024-05-21_14-57-05.files/protection/mix015.oepc.yml/witness.yml --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version bcb38a6f 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/mix015.oepc.i ./goblint.2024-05-21_14-57-05.files/protection/mix015.oepc.yml/witness.yml -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --traceabstraction.compute.hoare.annotation.of.negated.interpolant.automaton,.abstraction.and.cfg false --witnessparser.only.consider.loop.invariants false --cacsl2boogietranslator.check.unreachability.of.reach_error.function false --- Real Ultimate output --- This is Ultimate 0.2.4-tmp.fs.goblint-validation-bcb38a6-m [2024-06-04 14:48:17,601 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-06-04 14:48:17,670 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-06-04 14:48:17,676 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-06-04 14:48:17,677 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-06-04 14:48:17,706 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-06-04 14:48:17,707 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-06-04 14:48:17,707 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-06-04 14:48:17,708 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-06-04 14:48:17,712 INFO L153 SettingsManager]: * Use memory slicer=true [2024-06-04 14:48:17,712 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-06-04 14:48:17,712 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-06-04 14:48:17,713 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-06-04 14:48:17,714 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-06-04 14:48:17,714 INFO L153 SettingsManager]: * Use SBE=true [2024-06-04 14:48:17,714 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-06-04 14:48:17,715 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-06-04 14:48:17,715 INFO L153 SettingsManager]: * sizeof long=4 [2024-06-04 14:48:17,715 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-06-04 14:48:17,715 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-06-04 14:48:17,716 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-06-04 14:48:17,716 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-06-04 14:48:17,716 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-06-04 14:48:17,717 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-06-04 14:48:17,717 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-06-04 14:48:17,717 INFO L153 SettingsManager]: * sizeof long double=12 [2024-06-04 14:48:17,717 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-06-04 14:48:17,718 INFO L153 SettingsManager]: * Use constant arrays=true [2024-06-04 14:48:17,718 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-06-04 14:48:17,719 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-06-04 14:48:17,720 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-06-04 14:48:17,720 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-06-04 14:48:17,720 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-04 14:48:17,720 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-06-04 14:48:17,720 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-06-04 14:48:17,721 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-06-04 14:48:17,721 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-06-04 14:48:17,721 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-06-04 14:48:17,721 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-06-04 14:48:17,721 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-06-04 14:48:17,722 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-06-04 14:48:17,722 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-06-04 14:48:17,722 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-06-04 14:48:17,722 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check unreachability of reach_error function -> false [2024-06-04 14:48:17,979 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-06-04 14:48:17,999 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-06-04 14:48:18,003 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-06-04 14:48:18,004 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-06-04 14:48:18,004 INFO L274 PluginConnector]: Witness Parser initialized [2024-06-04 14:48:18,005 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/./goblint.2024-05-21_14-57-05.files/protection/mix015.oepc.yml/witness.yml [2024-06-04 14:48:18,185 INFO L270 PluginConnector]: Initializing CDTParser... [2024-06-04 14:48:18,186 INFO L274 PluginConnector]: CDTParser initialized [2024-06-04 14:48:18,186 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-wmm/mix015.oepc.i [2024-06-04 14:48:19,332 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-06-04 14:48:19,567 INFO L384 CDTParser]: Found 1 translation units. [2024-06-04 14:48:19,572 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/mix015.oepc.i [2024-06-04 14:48:19,590 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/735aaa1f2/e9ebb0adb2e24af88a2f2ac976b34a0c/FLAG89ba58efa [2024-06-04 14:48:19,606 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/735aaa1f2/e9ebb0adb2e24af88a2f2ac976b34a0c [2024-06-04 14:48:19,606 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-06-04 14:48:19,607 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-06-04 14:48:19,610 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-06-04 14:48:19,610 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-06-04 14:48:19,615 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-06-04 14:48:19,616 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 04.06 02:48:18" (1/2) ... [2024-06-04 14:48:19,617 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@42b74597 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 04.06 02:48:19, skipping insertion in model container [2024-06-04 14:48:19,617 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 04.06 02:48:18" (1/2) ... [2024-06-04 14:48:19,619 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@7f096f70 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 04.06 02:48:19, skipping insertion in model container [2024-06-04 14:48:19,619 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.06 02:48:19" (2/2) ... [2024-06-04 14:48:19,620 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@42b74597 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.06 02:48:19, skipping insertion in model container [2024-06-04 14:48:19,621 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.06 02:48:19" (2/2) ... [2024-06-04 14:48:19,621 INFO L83 nessWitnessExtractor]: Extracting all invariants from correctness witness [2024-06-04 14:48:19,730 INFO L95 edCorrectnessWitness]: Found the following entries in the witness: [2024-06-04 14:48:19,732 INFO L97 edCorrectnessWitness]: Location invariant before [L856-L856] (((((((((((((((((((((! multithreaded || a$r_buff0_thd0 == (_Bool)0) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || ((0 <= y && y <= 1) && (y == 0 || y == 1)))) && (! multithreaded || ((0 <= a$mem_tmp && a$mem_tmp <= 1) && (a$mem_tmp == 0 || a$mem_tmp == 1)))) && (! multithreaded || ((0 <= x && x <= 1) && (x == 0 || x == 1)))) && (! multithreaded || ((0 <= a && a <= 1) && (a == 0 || a == 1)))) && (! multithreaded || ((0 <= __unbuffered_p2_EBX && __unbuffered_p2_EBX <= 1) && (__unbuffered_p2_EBX == 0 || __unbuffered_p2_EBX == 1)))) && (! multithreaded || a$flush_delayed == (_Bool)0)) && (! multithreaded || a$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || a$read_delayed_var == 0)) && (! multithreaded || ((0 <= z && z <= 1) && (z == 0 || z == 1)))) && (! multithreaded || ((0 <= __unbuffered_p2_EAX && __unbuffered_p2_EAX <= 1) && (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1)))) && (! multithreaded || ((0 <= a$w_buff1 && a$w_buff1 <= 1) && (a$w_buff1 == 0 || a$w_buff1 == 1)))) && (! multithreaded || a$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || a$read_delayed == (_Bool)0)) && (! multithreaded || ((0 <= a$w_buff0 && a$w_buff0 <= 1) && (a$w_buff0 == 0 || a$w_buff0 == 1)))) && (! multithreaded || ((0 <= __unbuffered_p1_EAX && __unbuffered_p1_EAX <= 1) && (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1)))) && (! multithreaded || a$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p0_EAX && __unbuffered_p0_EAX <= 1) && (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1)))) && (! multithreaded || a$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || a$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p0_EBX && __unbuffered_p0_EBX <= 1) && (__unbuffered_p0_EBX == 0 || __unbuffered_p0_EBX == 1))) [2024-06-04 14:48:19,732 INFO L97 edCorrectnessWitness]: Location invariant before [L855-L855] (((((((((((((((((((((! multithreaded || a$r_buff0_thd0 == (_Bool)0) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || ((0 <= y && y <= 1) && (y == 0 || y == 1)))) && (! multithreaded || ((0 <= a$mem_tmp && a$mem_tmp <= 1) && (a$mem_tmp == 0 || a$mem_tmp == 1)))) && (! multithreaded || ((0 <= x && x <= 1) && (x == 0 || x == 1)))) && (! multithreaded || ((0 <= a && a <= 1) && (a == 0 || a == 1)))) && (! multithreaded || ((0 <= __unbuffered_p2_EBX && __unbuffered_p2_EBX <= 1) && (__unbuffered_p2_EBX == 0 || __unbuffered_p2_EBX == 1)))) && (! multithreaded || a$flush_delayed == (_Bool)0)) && (! multithreaded || a$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || a$read_delayed_var == 0)) && (! multithreaded || ((0 <= z && z <= 1) && (z == 0 || z == 1)))) && (! multithreaded || ((0 <= __unbuffered_p2_EAX && __unbuffered_p2_EAX <= 1) && (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1)))) && (! multithreaded || ((0 <= a$w_buff1 && a$w_buff1 <= 1) && (a$w_buff1 == 0 || a$w_buff1 == 1)))) && (! multithreaded || a$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || a$read_delayed == (_Bool)0)) && (! multithreaded || ((0 <= a$w_buff0 && a$w_buff0 <= 1) && (a$w_buff0 == 0 || a$w_buff0 == 1)))) && (! multithreaded || ((0 <= __unbuffered_p1_EAX && __unbuffered_p1_EAX <= 1) && (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1)))) && (! multithreaded || a$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p0_EAX && __unbuffered_p0_EAX <= 1) && (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1)))) && (! multithreaded || a$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || a$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p0_EBX && __unbuffered_p0_EBX <= 1) && (__unbuffered_p0_EBX == 0 || __unbuffered_p0_EBX == 1))) [2024-06-04 14:48:19,732 INFO L97 edCorrectnessWitness]: Location invariant before [L853-L853] (((((((((((((((((((((! multithreaded || a$r_buff0_thd0 == (_Bool)0) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || ((0 <= y && y <= 1) && (y == 0 || y == 1)))) && (! multithreaded || ((0 <= a$mem_tmp && a$mem_tmp <= 1) && (a$mem_tmp == 0 || a$mem_tmp == 1)))) && (! multithreaded || ((0 <= x && x <= 1) && (x == 0 || x == 1)))) && (! multithreaded || ((0 <= a && a <= 1) && (a == 0 || a == 1)))) && (! multithreaded || ((0 <= __unbuffered_p2_EBX && __unbuffered_p2_EBX <= 1) && (__unbuffered_p2_EBX == 0 || __unbuffered_p2_EBX == 1)))) && (! multithreaded || a$flush_delayed == (_Bool)0)) && (! multithreaded || a$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || a$read_delayed_var == 0)) && (! multithreaded || ((0 <= z && z <= 1) && (z == 0 || z == 1)))) && (! multithreaded || ((0 <= __unbuffered_p2_EAX && __unbuffered_p2_EAX <= 1) && (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1)))) && (! multithreaded || ((0 <= a$w_buff1 && a$w_buff1 <= 1) && (a$w_buff1 == 0 || a$w_buff1 == 1)))) && (! multithreaded || a$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || a$read_delayed == (_Bool)0)) && (! multithreaded || ((0 <= a$w_buff0 && a$w_buff0 <= 1) && (a$w_buff0 == 0 || a$w_buff0 == 1)))) && (! multithreaded || ((0 <= __unbuffered_p1_EAX && __unbuffered_p1_EAX <= 1) && (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1)))) && (! multithreaded || a$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p0_EAX && __unbuffered_p0_EAX <= 1) && (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1)))) && (! multithreaded || a$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || a$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p0_EBX && __unbuffered_p0_EBX <= 1) && (__unbuffered_p0_EBX == 0 || __unbuffered_p0_EBX == 1))) [2024-06-04 14:48:19,733 INFO L103 edCorrectnessWitness]: ghost_variable multithreaded = 0 [2024-06-04 14:48:19,733 INFO L106 edCorrectnessWitness]: ghost_update [L851-L851] multithreaded = 1; [2024-06-04 14:48:19,778 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-06-04 14:48:20,162 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-04 14:48:20,174 INFO L202 MainTranslator]: Completed pre-run Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local [2024-06-04 14:48:20,321 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-04 14:48:20,355 INFO L206 MainTranslator]: Completed translation [2024-06-04 14:48:20,355 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.06 02:48:20 WrapperNode [2024-06-04 14:48:20,356 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-06-04 14:48:20,357 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-06-04 14:48:20,357 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-06-04 14:48:20,357 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-06-04 14:48:20,363 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.06 02:48:20" (1/1) ... [2024-06-04 14:48:20,380 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.06 02:48:20" (1/1) ... [2024-06-04 14:48:20,466 INFO L138 Inliner]: procedures = 175, calls = 49, calls flagged for inlining = 6, calls inlined = 7, statements flattened = 135 [2024-06-04 14:48:20,467 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-06-04 14:48:20,468 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-06-04 14:48:20,469 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-06-04 14:48:20,469 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-06-04 14:48:20,479 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.06 02:48:20" (1/1) ... [2024-06-04 14:48:20,480 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.06 02:48:20" (1/1) ... [2024-06-04 14:48:20,493 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.06 02:48:20" (1/1) ... [2024-06-04 14:48:20,512 INFO L175 MemorySlicer]: Split 2 memory accesses to 1 slices as follows [2]. 100 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2]. The 0 writes are split as follows [0]. [2024-06-04 14:48:20,512 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.06 02:48:20" (1/1) ... [2024-06-04 14:48:20,512 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.06 02:48:20" (1/1) ... [2024-06-04 14:48:20,522 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.06 02:48:20" (1/1) ... [2024-06-04 14:48:20,529 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.06 02:48:20" (1/1) ... [2024-06-04 14:48:20,533 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.06 02:48:20" (1/1) ... [2024-06-04 14:48:20,534 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.06 02:48:20" (1/1) ... [2024-06-04 14:48:20,543 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-06-04 14:48:20,544 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-06-04 14:48:20,544 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-06-04 14:48:20,544 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-06-04 14:48:20,545 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.06 02:48:20" (1/1) ... [2024-06-04 14:48:20,551 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-04 14:48:20,560 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-04 14:48:20,581 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) [2024-06-04 14:48:20,588 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 [2024-06-04 14:48:20,618 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-06-04 14:48:20,619 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-06-04 14:48:20,619 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2024-06-04 14:48:20,619 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2024-06-04 14:48:20,619 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2024-06-04 14:48:20,620 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2024-06-04 14:48:20,620 INFO L130 BoogieDeclarations]: Found specification of procedure P2 [2024-06-04 14:48:20,620 INFO L138 BoogieDeclarations]: Found implementation of procedure P2 [2024-06-04 14:48:20,620 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-06-04 14:48:20,620 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-06-04 14:48:20,621 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-06-04 14:48:20,621 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-06-04 14:48:20,622 WARN L214 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2024-06-04 14:48:20,767 INFO L244 CfgBuilder]: Building ICFG [2024-06-04 14:48:20,768 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-06-04 14:48:21,139 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-06-04 14:48:21,140 INFO L293 CfgBuilder]: Performing block encoding [2024-06-04 14:48:21,288 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-06-04 14:48:21,289 INFO L320 CfgBuilder]: Removed 0 assume(true) statements. [2024-06-04 14:48:21,289 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.06 02:48:21 BoogieIcfgContainer [2024-06-04 14:48:21,290 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-06-04 14:48:21,292 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-06-04 14:48:21,292 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-06-04 14:48:21,295 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-06-04 14:48:21,295 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 04.06 02:48:18" (1/4) ... [2024-06-04 14:48:21,296 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@27abd1fd and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 04.06 02:48:21, skipping insertion in model container [2024-06-04 14:48:21,296 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 04.06 02:48:19" (2/4) ... [2024-06-04 14:48:21,297 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@27abd1fd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.06 02:48:21, skipping insertion in model container [2024-06-04 14:48:21,297 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.06 02:48:20" (3/4) ... [2024-06-04 14:48:21,298 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@27abd1fd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.06 02:48:21, skipping insertion in model container [2024-06-04 14:48:21,299 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.06 02:48:21" (4/4) ... [2024-06-04 14:48:21,299 INFO L112 eAbstractionObserver]: Analyzing ICFG mix015.oepc.i [2024-06-04 14:48:21,315 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-06-04 14:48:21,315 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 3 error locations. [2024-06-04 14:48:21,316 INFO L522 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-06-04 14:48:21,392 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-06-04 14:48:21,428 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 54 places, 44 transitions, 100 flow [2024-06-04 14:48:21,460 INFO L124 PetriNetUnfolderBase]: 0/41 cut-off events. [2024-06-04 14:48:21,461 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-04 14:48:21,463 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51 conditions, 41 events. 0/41 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 76 event pairs, 0 based on Foata normal form. 0/38 useless extension candidates. Maximal degree in co-relation 0. Up to 1 conditions per place. [2024-06-04 14:48:21,464 INFO L82 GeneralOperation]: Start removeDead. Operand has 54 places, 44 transitions, 100 flow [2024-06-04 14:48:21,468 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 45 places, 35 transitions, 79 flow [2024-06-04 14:48:21,478 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-06-04 14:48:21,485 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;@5024b11c, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-06-04 14:48:21,485 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2024-06-04 14:48:21,491 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-06-04 14:48:21,491 INFO L124 PetriNetUnfolderBase]: 0/7 cut-off events. [2024-06-04 14:48:21,491 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-04 14:48:21,491 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:48:21,492 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2024-06-04 14:48:21,492 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 14:48:21,497 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:48:21,497 INFO L85 PathProgramCache]: Analyzing trace with hash -1071780369, now seen corresponding path program 1 times [2024-06-04 14:48:21,505 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:48:21,506 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [178179356] [2024-06-04 14:48:21,507 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:48:21,507 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:48:21,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:48:22,961 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:48:22,962 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:48:22,963 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [178179356] [2024-06-04 14:48:22,963 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [178179356] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:48:22,963 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:48:22,964 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-06-04 14:48:22,965 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2025068802] [2024-06-04 14:48:22,966 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:48:22,973 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-06-04 14:48:22,977 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:48:23,004 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-06-04 14:48:23,004 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-06-04 14:48:23,067 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 44 [2024-06-04 14:48:23,070 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 35 transitions, 79 flow. Second operand has 3 states, 3 states have (on average 15.0) internal successors, (45), 3 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:48:23,070 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:48:23,070 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 44 [2024-06-04 14:48:23,071 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:48:23,566 INFO L124 PetriNetUnfolderBase]: 1363/2134 cut-off events. [2024-06-04 14:48:23,566 INFO L125 PetriNetUnfolderBase]: For 34/34 co-relation queries the response was YES. [2024-06-04 14:48:23,574 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4260 conditions, 2134 events. 1363/2134 cut-off events. For 34/34 co-relation queries the response was YES. Maximal size of possible extension queue 103. Compared 10802 event pairs, 964 based on Foata normal form. 1/2097 useless extension candidates. Maximal degree in co-relation 4245. Up to 2037 conditions per place. [2024-06-04 14:48:23,585 INFO L140 encePairwiseOnDemand]: 37/44 looper letters, 34 selfloop transitions, 4 changer transitions 0/45 dead transitions. [2024-06-04 14:48:23,586 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 47 places, 45 transitions, 181 flow [2024-06-04 14:48:23,587 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-06-04 14:48:23,589 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-06-04 14:48:23,595 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 80 transitions. [2024-06-04 14:48:23,597 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6060606060606061 [2024-06-04 14:48:23,599 INFO L175 Difference]: Start difference. First operand has 45 places, 35 transitions, 79 flow. Second operand 3 states and 80 transitions. [2024-06-04 14:48:23,599 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 47 places, 45 transitions, 181 flow [2024-06-04 14:48:23,601 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 44 places, 45 transitions, 176 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-06-04 14:48:23,606 INFO L231 Difference]: Finished difference. Result has 45 places, 38 transitions, 106 flow [2024-06-04 14:48:23,607 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=76, PETRI_DIFFERENCE_MINUEND_PLACES=42, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=35, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=106, PETRI_PLACES=45, PETRI_TRANSITIONS=38} [2024-06-04 14:48:23,610 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 0 predicate places. [2024-06-04 14:48:23,610 INFO L495 AbstractCegarLoop]: Abstraction has has 45 places, 38 transitions, 106 flow [2024-06-04 14:48:23,611 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 15.0) internal successors, (45), 3 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:48:23,611 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:48:23,611 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:48:23,611 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-06-04 14:48:23,612 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 14:48:23,612 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:48:23,613 INFO L85 PathProgramCache]: Analyzing trace with hash 811259214, now seen corresponding path program 1 times [2024-06-04 14:48:23,613 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:48:23,613 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [872553564] [2024-06-04 14:48:23,613 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:48:23,614 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:48:23,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:48:24,716 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:48:24,716 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:48:24,716 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [872553564] [2024-06-04 14:48:24,717 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [872553564] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:48:24,717 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:48:24,717 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-06-04 14:48:24,717 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [725241108] [2024-06-04 14:48:24,718 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:48:24,719 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-04 14:48:24,720 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:48:24,721 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-04 14:48:24,721 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-06-04 14:48:24,827 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 44 [2024-06-04 14:48:24,828 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 38 transitions, 106 flow. Second operand has 4 states, 4 states have (on average 14.75) internal successors, (59), 4 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:48:24,828 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:48:24,828 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 44 [2024-06-04 14:48:24,829 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:48:25,223 INFO L124 PetriNetUnfolderBase]: 1357/2125 cut-off events. [2024-06-04 14:48:25,223 INFO L125 PetriNetUnfolderBase]: For 402/402 co-relation queries the response was YES. [2024-06-04 14:48:25,227 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4794 conditions, 2125 events. 1357/2125 cut-off events. For 402/402 co-relation queries the response was YES. Maximal size of possible extension queue 103. Compared 10692 event pairs, 840 based on Foata normal form. 3/2124 useless extension candidates. Maximal degree in co-relation 4779. Up to 2013 conditions per place. [2024-06-04 14:48:25,237 INFO L140 encePairwiseOnDemand]: 36/44 looper letters, 41 selfloop transitions, 7 changer transitions 0/55 dead transitions. [2024-06-04 14:48:25,237 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 48 places, 55 transitions, 248 flow [2024-06-04 14:48:25,237 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-04 14:48:25,238 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-04 14:48:25,239 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 103 transitions. [2024-06-04 14:48:25,239 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5852272727272727 [2024-06-04 14:48:25,239 INFO L175 Difference]: Start difference. First operand has 45 places, 38 transitions, 106 flow. Second operand 4 states and 103 transitions. [2024-06-04 14:48:25,239 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 48 places, 55 transitions, 248 flow [2024-06-04 14:48:25,240 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 47 places, 55 transitions, 244 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-06-04 14:48:25,241 INFO L231 Difference]: Finished difference. Result has 48 places, 41 transitions, 142 flow [2024-06-04 14:48:25,242 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=102, PETRI_DIFFERENCE_MINUEND_PLACES=44, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=142, PETRI_PLACES=48, PETRI_TRANSITIONS=41} [2024-06-04 14:48:25,242 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 3 predicate places. [2024-06-04 14:48:25,243 INFO L495 AbstractCegarLoop]: Abstraction has has 48 places, 41 transitions, 142 flow [2024-06-04 14:48:25,243 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 14.75) internal successors, (59), 4 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:48:25,243 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:48:25,243 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:48:25,243 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-06-04 14:48:25,244 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 14:48:25,244 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:48:25,244 INFO L85 PathProgramCache]: Analyzing trace with hash -620766744, now seen corresponding path program 1 times [2024-06-04 14:48:25,244 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:48:25,245 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1213039757] [2024-06-04 14:48:25,245 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:48:25,245 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:48:25,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:48:26,574 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:48:26,574 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:48:26,575 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1213039757] [2024-06-04 14:48:26,575 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1213039757] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:48:26,575 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:48:26,575 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-04 14:48:26,576 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1395739977] [2024-06-04 14:48:26,576 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:48:26,576 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-04 14:48:26,576 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:48:26,577 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-04 14:48:26,577 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-06-04 14:48:26,662 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 44 [2024-06-04 14:48:26,663 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 48 places, 41 transitions, 142 flow. Second operand has 5 states, 5 states have (on average 13.6) internal successors, (68), 5 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:48:26,663 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:48:26,663 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 44 [2024-06-04 14:48:26,663 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:48:27,141 INFO L124 PetriNetUnfolderBase]: 1598/2490 cut-off events. [2024-06-04 14:48:27,141 INFO L125 PetriNetUnfolderBase]: For 1293/1293 co-relation queries the response was YES. [2024-06-04 14:48:27,145 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6204 conditions, 2490 events. 1598/2490 cut-off events. For 1293/1293 co-relation queries the response was YES. Maximal size of possible extension queue 113. Compared 12483 event pairs, 915 based on Foata normal form. 3/2492 useless extension candidates. Maximal degree in co-relation 6187. Up to 2350 conditions per place. [2024-06-04 14:48:27,155 INFO L140 encePairwiseOnDemand]: 35/44 looper letters, 49 selfloop transitions, 10 changer transitions 0/65 dead transitions. [2024-06-04 14:48:27,156 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 52 places, 65 transitions, 328 flow [2024-06-04 14:48:27,157 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-04 14:48:27,157 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-04 14:48:27,158 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 122 transitions. [2024-06-04 14:48:27,158 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5545454545454546 [2024-06-04 14:48:27,158 INFO L175 Difference]: Start difference. First operand has 48 places, 41 transitions, 142 flow. Second operand 5 states and 122 transitions. [2024-06-04 14:48:27,159 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 52 places, 65 transitions, 328 flow [2024-06-04 14:48:27,160 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 50 places, 65 transitions, 314 flow, removed 2 selfloop flow, removed 2 redundant places. [2024-06-04 14:48:27,161 INFO L231 Difference]: Finished difference. Result has 51 places, 44 transitions, 178 flow [2024-06-04 14:48:27,162 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=128, PETRI_DIFFERENCE_MINUEND_PLACES=46, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=178, PETRI_PLACES=51, PETRI_TRANSITIONS=44} [2024-06-04 14:48:27,162 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 6 predicate places. [2024-06-04 14:48:27,163 INFO L495 AbstractCegarLoop]: Abstraction has has 51 places, 44 transitions, 178 flow [2024-06-04 14:48:27,163 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 13.6) internal successors, (68), 5 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:48:27,163 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:48:27,163 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:48:27,163 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-06-04 14:48:27,164 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 14:48:27,164 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:48:27,164 INFO L85 PathProgramCache]: Analyzing trace with hash -2063898451, now seen corresponding path program 1 times [2024-06-04 14:48:27,164 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:48:27,165 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1636347032] [2024-06-04 14:48:27,165 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:48:27,165 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:48:27,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:48:28,599 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:48:28,600 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:48:28,603 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1636347032] [2024-06-04 14:48:28,603 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1636347032] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:48:28,604 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:48:28,604 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-04 14:48:28,604 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1560836993] [2024-06-04 14:48:28,605 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:48:28,605 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-04 14:48:28,605 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:48:28,607 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-04 14:48:28,608 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-04 14:48:28,702 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 44 [2024-06-04 14:48:28,703 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 44 transitions, 178 flow. Second operand has 6 states, 6 states have (on average 13.5) internal successors, (81), 6 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:48:28,703 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:48:28,704 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 44 [2024-06-04 14:48:28,705 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:48:29,197 INFO L124 PetriNetUnfolderBase]: 1592/2480 cut-off events. [2024-06-04 14:48:29,197 INFO L125 PetriNetUnfolderBase]: For 2422/2422 co-relation queries the response was YES. [2024-06-04 14:48:29,203 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6774 conditions, 2480 events. 1592/2480 cut-off events. For 2422/2422 co-relation queries the response was YES. Maximal size of possible extension queue 113. Compared 12535 event pairs, 791 based on Foata normal form. 3/2482 useless extension candidates. Maximal degree in co-relation 6756. Up to 2326 conditions per place. [2024-06-04 14:48:29,215 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 56 selfloop transitions, 13 changer transitions 0/75 dead transitions. [2024-06-04 14:48:29,215 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 56 places, 75 transitions, 406 flow [2024-06-04 14:48:29,216 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-04 14:48:29,216 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-04 14:48:29,218 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 144 transitions. [2024-06-04 14:48:29,219 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5454545454545454 [2024-06-04 14:48:29,219 INFO L175 Difference]: Start difference. First operand has 51 places, 44 transitions, 178 flow. Second operand 6 states and 144 transitions. [2024-06-04 14:48:29,219 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 56 places, 75 transitions, 406 flow [2024-06-04 14:48:29,224 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 53 places, 75 transitions, 382 flow, removed 4 selfloop flow, removed 3 redundant places. [2024-06-04 14:48:29,226 INFO L231 Difference]: Finished difference. Result has 54 places, 47 transitions, 214 flow [2024-06-04 14:48:29,226 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=154, PETRI_DIFFERENCE_MINUEND_PLACES=48, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=44, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=214, PETRI_PLACES=54, PETRI_TRANSITIONS=47} [2024-06-04 14:48:29,227 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 9 predicate places. [2024-06-04 14:48:29,227 INFO L495 AbstractCegarLoop]: Abstraction has has 54 places, 47 transitions, 214 flow [2024-06-04 14:48:29,228 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 13.5) internal successors, (81), 6 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:48:29,228 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:48:29,228 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:48:29,228 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-06-04 14:48:29,228 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 14:48:29,229 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:48:29,229 INFO L85 PathProgramCache]: Analyzing trace with hash -421973203, now seen corresponding path program 1 times [2024-06-04 14:48:29,229 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:48:29,229 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1930938212] [2024-06-04 14:48:29,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:48:29,230 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:48:29,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:48:30,053 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:48:30,054 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:48:30,054 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1930938212] [2024-06-04 14:48:30,054 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1930938212] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:48:30,054 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:48:30,054 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-04 14:48:30,054 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [732738619] [2024-06-04 14:48:30,055 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:48:30,055 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-04 14:48:30,056 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:48:30,056 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-04 14:48:30,056 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-06-04 14:48:30,152 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-04 14:48:30,153 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 54 places, 47 transitions, 214 flow. Second operand has 6 states, 6 states have (on average 12.666666666666666) internal successors, (76), 6 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:48:30,153 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:48:30,153 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-04 14:48:30,153 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:48:30,828 INFO L124 PetriNetUnfolderBase]: 1740/2795 cut-off events. [2024-06-04 14:48:30,828 INFO L125 PetriNetUnfolderBase]: For 4262/4262 co-relation queries the response was YES. [2024-06-04 14:48:30,835 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8075 conditions, 2795 events. 1740/2795 cut-off events. For 4262/4262 co-relation queries the response was YES. Maximal size of possible extension queue 129. Compared 14481 event pairs, 933 based on Foata normal form. 4/2798 useless extension candidates. Maximal degree in co-relation 8056. Up to 2573 conditions per place. [2024-06-04 14:48:30,849 INFO L140 encePairwiseOnDemand]: 36/44 looper letters, 47 selfloop transitions, 8 changer transitions 0/62 dead transitions. [2024-06-04 14:48:30,849 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 58 places, 62 transitions, 370 flow [2024-06-04 14:48:30,850 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-04 14:48:30,850 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-04 14:48:30,850 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 104 transitions. [2024-06-04 14:48:30,851 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4727272727272727 [2024-06-04 14:48:30,851 INFO L175 Difference]: Start difference. First operand has 54 places, 47 transitions, 214 flow. Second operand 5 states and 104 transitions. [2024-06-04 14:48:30,851 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 58 places, 62 transitions, 370 flow [2024-06-04 14:48:30,854 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 54 places, 62 transitions, 336 flow, removed 6 selfloop flow, removed 4 redundant places. [2024-06-04 14:48:30,855 INFO L231 Difference]: Finished difference. Result has 55 places, 50 transitions, 226 flow [2024-06-04 14:48:30,855 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=180, PETRI_DIFFERENCE_MINUEND_PLACES=50, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=47, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=226, PETRI_PLACES=55, PETRI_TRANSITIONS=50} [2024-06-04 14:48:30,856 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 10 predicate places. [2024-06-04 14:48:30,856 INFO L495 AbstractCegarLoop]: Abstraction has has 55 places, 50 transitions, 226 flow [2024-06-04 14:48:30,856 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 12.666666666666666) internal successors, (76), 6 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:48:30,856 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:48:30,856 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:48:30,857 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-06-04 14:48:30,857 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 14:48:30,857 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:48:30,857 INFO L85 PathProgramCache]: Analyzing trace with hash -23648614, now seen corresponding path program 1 times [2024-06-04 14:48:30,858 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:48:30,858 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2116770201] [2024-06-04 14:48:30,858 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:48:30,858 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:48:30,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:48:33,183 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:48:33,184 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:48:33,184 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2116770201] [2024-06-04 14:48:33,184 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2116770201] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:48:33,184 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:48:33,185 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 14:48:33,185 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2089515474] [2024-06-04 14:48:33,185 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:48:33,185 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 14:48:33,186 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:48:33,186 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 14:48:33,186 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-04 14:48:33,378 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-04 14:48:33,379 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 55 places, 50 transitions, 226 flow. Second operand has 8 states, 8 states have (on average 12.375) internal successors, (99), 8 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) [2024-06-04 14:48:33,379 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:48:33,379 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-04 14:48:33,379 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:48:34,025 INFO L124 PetriNetUnfolderBase]: 1817/2859 cut-off events. [2024-06-04 14:48:34,026 INFO L125 PetriNetUnfolderBase]: For 5804/5804 co-relation queries the response was YES. [2024-06-04 14:48:34,032 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8878 conditions, 2859 events. 1817/2859 cut-off events. For 5804/5804 co-relation queries the response was YES. Maximal size of possible extension queue 128. Compared 14487 event pairs, 724 based on Foata normal form. 3/2861 useless extension candidates. Maximal degree in co-relation 8857. Up to 2625 conditions per place. [2024-06-04 14:48:34,052 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 74 selfloop transitions, 19 changer transitions 0/98 dead transitions. [2024-06-04 14:48:34,052 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 62 places, 98 transitions, 554 flow [2024-06-04 14:48:34,053 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 14:48:34,053 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 14:48:34,054 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 181 transitions. [2024-06-04 14:48:34,054 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5142045454545454 [2024-06-04 14:48:34,054 INFO L175 Difference]: Start difference. First operand has 55 places, 50 transitions, 226 flow. Second operand 8 states and 181 transitions. [2024-06-04 14:48:34,055 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 62 places, 98 transitions, 554 flow [2024-06-04 14:48:34,057 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 59 places, 98 transitions, 532 flow, removed 5 selfloop flow, removed 3 redundant places. [2024-06-04 14:48:34,060 INFO L231 Difference]: Finished difference. Result has 61 places, 56 transitions, 298 flow [2024-06-04 14:48:34,060 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=204, PETRI_DIFFERENCE_MINUEND_PLACES=52, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=50, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=298, PETRI_PLACES=61, PETRI_TRANSITIONS=56} [2024-06-04 14:48:34,062 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 16 predicate places. [2024-06-04 14:48:34,062 INFO L495 AbstractCegarLoop]: Abstraction has has 61 places, 56 transitions, 298 flow [2024-06-04 14:48:34,063 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.375) internal successors, (99), 8 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) [2024-06-04 14:48:34,063 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:48:34,063 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:48:34,063 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-06-04 14:48:34,063 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 14:48:34,064 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:48:34,064 INFO L85 PathProgramCache]: Analyzing trace with hash -487386576, now seen corresponding path program 1 times [2024-06-04 14:48:34,064 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:48:34,068 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1767947470] [2024-06-04 14:48:34,068 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:48:34,068 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:48:34,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:48:35,232 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:48:35,232 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:48:35,232 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1767947470] [2024-06-04 14:48:35,232 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1767947470] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:48:35,232 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:48:35,233 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-04 14:48:35,233 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1937861008] [2024-06-04 14:48:35,233 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:48:35,233 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-04 14:48:35,233 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:48:35,234 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-04 14:48:35,234 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-04 14:48:35,326 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-04 14:48:35,326 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 61 places, 56 transitions, 298 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) [2024-06-04 14:48:35,326 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:48:35,327 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-04 14:48:35,327 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:48:35,915 INFO L124 PetriNetUnfolderBase]: 1772/2824 cut-off events. [2024-06-04 14:48:35,916 INFO L125 PetriNetUnfolderBase]: For 8227/8227 co-relation queries the response was YES. [2024-06-04 14:48:35,923 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9557 conditions, 2824 events. 1772/2824 cut-off events. For 8227/8227 co-relation queries the response was YES. Maximal size of possible extension queue 128. Compared 14572 event pairs, 679 based on Foata normal form. 4/2826 useless extension candidates. Maximal degree in co-relation 9535. Up to 2571 conditions per place. [2024-06-04 14:48:35,940 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 64 selfloop transitions, 16 changer transitions 0/87 dead transitions. [2024-06-04 14:48:35,940 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 66 places, 87 transitions, 590 flow [2024-06-04 14:48:35,940 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-04 14:48:35,941 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-04 14:48:35,941 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 130 transitions. [2024-06-04 14:48:35,942 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49242424242424243 [2024-06-04 14:48:35,942 INFO L175 Difference]: Start difference. First operand has 61 places, 56 transitions, 298 flow. Second operand 6 states and 130 transitions. [2024-06-04 14:48:35,942 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 66 places, 87 transitions, 590 flow [2024-06-04 14:48:35,946 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 61 places, 87 transitions, 540 flow, removed 9 selfloop flow, removed 5 redundant places. [2024-06-04 14:48:35,949 INFO L231 Difference]: Finished difference. Result has 63 places, 65 transitions, 360 flow [2024-06-04 14:48:35,949 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=248, PETRI_DIFFERENCE_MINUEND_PLACES=56, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=56, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=360, PETRI_PLACES=63, PETRI_TRANSITIONS=65} [2024-06-04 14:48:35,950 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 18 predicate places. [2024-06-04 14:48:35,950 INFO L495 AbstractCegarLoop]: Abstraction has has 63 places, 65 transitions, 360 flow [2024-06-04 14:48:35,951 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) [2024-06-04 14:48:35,951 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:48:35,951 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:48:35,951 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-06-04 14:48:35,951 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 14:48:35,952 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:48:35,952 INFO L85 PathProgramCache]: Analyzing trace with hash -733105512, now seen corresponding path program 1 times [2024-06-04 14:48:35,952 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:48:35,952 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1669277822] [2024-06-04 14:48:35,952 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:48:35,953 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:48:35,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:48:38,277 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:48:38,277 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:48:38,277 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1669277822] [2024-06-04 14:48:38,277 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1669277822] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:48:38,277 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:48:38,278 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 14:48:38,278 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1016484293] [2024-06-04 14:48:38,278 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:48:38,278 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 14:48:38,278 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:48:38,279 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 14:48:38,279 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-04 14:48:38,538 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-04 14:48:38,539 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 65 transitions, 360 flow. Second operand has 9 states, 9 states have (on average 12.333333333333334) internal successors, (111), 9 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:48:38,539 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:48:38,539 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-04 14:48:38,539 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:48:39,258 INFO L124 PetriNetUnfolderBase]: 1846/2877 cut-off events. [2024-06-04 14:48:39,259 INFO L125 PetriNetUnfolderBase]: For 10861/10861 co-relation queries the response was YES. [2024-06-04 14:48:39,267 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10549 conditions, 2877 events. 1846/2877 cut-off events. For 10861/10861 co-relation queries the response was YES. Maximal size of possible extension queue 128. Compared 14475 event pairs, 554 based on Foata normal form. 6/2882 useless extension candidates. Maximal degree in co-relation 10524. Up to 2635 conditions per place. [2024-06-04 14:48:39,280 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 87 selfloop transitions, 21 changer transitions 0/113 dead transitions. [2024-06-04 14:48:39,280 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 70 places, 113 transitions, 712 flow [2024-06-04 14:48:39,281 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 14:48:39,281 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 14:48:39,282 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 198 transitions. [2024-06-04 14:48:39,282 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5 [2024-06-04 14:48:39,283 INFO L175 Difference]: Start difference. First operand has 63 places, 65 transitions, 360 flow. Second operand 9 states and 198 transitions. [2024-06-04 14:48:39,286 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 70 places, 113 transitions, 712 flow [2024-06-04 14:48:39,293 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 69 places, 113 transitions, 694 flow, removed 8 selfloop flow, removed 1 redundant places. [2024-06-04 14:48:39,294 INFO L231 Difference]: Finished difference. Result has 70 places, 66 transitions, 411 flow [2024-06-04 14:48:39,295 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=330, PETRI_DIFFERENCE_MINUEND_PLACES=61, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=64, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=411, PETRI_PLACES=70, PETRI_TRANSITIONS=66} [2024-06-04 14:48:39,298 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 25 predicate places. [2024-06-04 14:48:39,299 INFO L495 AbstractCegarLoop]: Abstraction has has 70 places, 66 transitions, 411 flow [2024-06-04 14:48:39,299 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.333333333333334) internal successors, (111), 9 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:48:39,299 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:48:39,299 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:48:39,299 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-06-04 14:48:39,299 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 14:48:39,300 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:48:39,300 INFO L85 PathProgramCache]: Analyzing trace with hash -487119666, now seen corresponding path program 2 times [2024-06-04 14:48:39,300 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:48:39,300 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1402029180] [2024-06-04 14:48:39,301 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:48:39,301 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:48:39,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:48:40,310 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:48:40,311 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:48:40,311 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1402029180] [2024-06-04 14:48:40,311 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1402029180] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:48:40,311 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:48:40,311 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-04 14:48:40,312 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1886205216] [2024-06-04 14:48:40,312 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:48:40,312 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-04 14:48:40,312 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:48:40,313 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-04 14:48:40,313 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-04 14:48:40,411 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-04 14:48:40,411 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 70 places, 66 transitions, 411 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) [2024-06-04 14:48:40,411 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:48:40,411 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-04 14:48:40,412 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:48:40,995 INFO L124 PetriNetUnfolderBase]: 1753/2780 cut-off events. [2024-06-04 14:48:40,995 INFO L125 PetriNetUnfolderBase]: For 13536/13536 co-relation queries the response was YES. [2024-06-04 14:48:41,004 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10730 conditions, 2780 events. 1753/2780 cut-off events. For 13536/13536 co-relation queries the response was YES. Maximal size of possible extension queue 128. Compared 14316 event pairs, 655 based on Foata normal form. 4/2783 useless extension candidates. Maximal degree in co-relation 10703. Up to 2581 conditions per place. [2024-06-04 14:48:41,015 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 64 selfloop transitions, 11 changer transitions 0/82 dead transitions. [2024-06-04 14:48:41,016 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 75 places, 82 transitions, 603 flow [2024-06-04 14:48:41,020 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-04 14:48:41,020 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-04 14:48:41,021 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 121 transitions. [2024-06-04 14:48:41,022 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4583333333333333 [2024-06-04 14:48:41,022 INFO L175 Difference]: Start difference. First operand has 70 places, 66 transitions, 411 flow. Second operand 6 states and 121 transitions. [2024-06-04 14:48:41,022 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 75 places, 82 transitions, 603 flow [2024-06-04 14:48:41,032 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 68 places, 82 transitions, 528 flow, removed 18 selfloop flow, removed 7 redundant places. [2024-06-04 14:48:41,036 INFO L231 Difference]: Finished difference. Result has 69 places, 66 transitions, 366 flow [2024-06-04 14:48:41,037 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=336, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=66, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=55, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=366, PETRI_PLACES=69, PETRI_TRANSITIONS=66} [2024-06-04 14:48:41,038 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 24 predicate places. [2024-06-04 14:48:41,038 INFO L495 AbstractCegarLoop]: Abstraction has has 69 places, 66 transitions, 366 flow [2024-06-04 14:48:41,039 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) [2024-06-04 14:48:41,039 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:48:41,039 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:48:41,039 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-06-04 14:48:41,039 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 14:48:41,040 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:48:41,040 INFO L85 PathProgramCache]: Analyzing trace with hash 130408690, now seen corresponding path program 1 times [2024-06-04 14:48:41,040 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:48:41,041 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [71161518] [2024-06-04 14:48:41,041 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:48:41,042 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:48:41,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:48:42,172 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:48:42,172 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:48:42,172 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [71161518] [2024-06-04 14:48:42,172 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [71161518] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:48:42,173 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:48:42,173 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 14:48:42,173 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1431741976] [2024-06-04 14:48:42,174 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:48:42,174 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 14:48:42,174 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:48:42,175 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 14:48:42,175 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-04 14:48:42,256 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-04 14:48:42,257 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 69 places, 66 transitions, 366 flow. Second operand has 8 states, 8 states have (on average 11.5) internal successors, (92), 8 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:48:42,257 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:48:42,257 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-04 14:48:42,257 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:48:42,797 INFO L124 PetriNetUnfolderBase]: 1874/2907 cut-off events. [2024-06-04 14:48:42,797 INFO L125 PetriNetUnfolderBase]: For 16103/16103 co-relation queries the response was YES. [2024-06-04 14:48:42,803 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11362 conditions, 2907 events. 1874/2907 cut-off events. For 16103/16103 co-relation queries the response was YES. Maximal size of possible extension queue 127. Compared 14654 event pairs, 619 based on Foata normal form. 4/2909 useless extension candidates. Maximal degree in co-relation 11333. Up to 2649 conditions per place. [2024-06-04 14:48:42,815 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 73 selfloop transitions, 24 changer transitions 0/102 dead transitions. [2024-06-04 14:48:42,815 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 75 places, 102 transitions, 732 flow [2024-06-04 14:48:42,816 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 14:48:42,816 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 14:48:42,816 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 146 transitions. [2024-06-04 14:48:42,817 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.474025974025974 [2024-06-04 14:48:42,817 INFO L175 Difference]: Start difference. First operand has 69 places, 66 transitions, 366 flow. Second operand 7 states and 146 transitions. [2024-06-04 14:48:42,817 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 75 places, 102 transitions, 732 flow [2024-06-04 14:48:42,827 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 70 places, 102 transitions, 700 flow, removed 2 selfloop flow, removed 5 redundant places. [2024-06-04 14:48:42,828 INFO L231 Difference]: Finished difference. Result has 71 places, 72 transitions, 452 flow [2024-06-04 14:48:42,828 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=334, PETRI_DIFFERENCE_MINUEND_PLACES=64, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=66, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=452, PETRI_PLACES=71, PETRI_TRANSITIONS=72} [2024-06-04 14:48:42,829 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 26 predicate places. [2024-06-04 14:48:42,829 INFO L495 AbstractCegarLoop]: Abstraction has has 71 places, 72 transitions, 452 flow [2024-06-04 14:48:42,829 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.5) internal successors, (92), 8 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:48:42,829 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:48:42,830 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:48:42,830 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-06-04 14:48:42,830 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 14:48:42,830 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:48:42,831 INFO L85 PathProgramCache]: Analyzing trace with hash 130588180, now seen corresponding path program 2 times [2024-06-04 14:48:42,831 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:48:42,831 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [99100458] [2024-06-04 14:48:42,831 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:48:42,831 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:48:42,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:48:44,040 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:48:44,040 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:48:44,040 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [99100458] [2024-06-04 14:48:44,040 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [99100458] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:48:44,040 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:48:44,041 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 14:48:44,041 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1446480045] [2024-06-04 14:48:44,041 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:48:44,041 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 14:48:44,042 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:48:44,042 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 14:48:44,042 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-04 14:48:44,127 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-04 14:48:44,127 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 72 transitions, 452 flow. Second operand has 8 states, 8 states have (on average 11.5) internal successors, (92), 8 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:48:44,128 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:48:44,128 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-04 14:48:44,128 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:48:44,601 INFO L124 PetriNetUnfolderBase]: 1896/2939 cut-off events. [2024-06-04 14:48:44,601 INFO L125 PetriNetUnfolderBase]: For 19595/19595 co-relation queries the response was YES. [2024-06-04 14:48:44,608 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12202 conditions, 2939 events. 1896/2939 cut-off events. For 19595/19595 co-relation queries the response was YES. Maximal size of possible extension queue 127. Compared 14782 event pairs, 626 based on Foata normal form. 4/2941 useless extension candidates. Maximal degree in co-relation 12173. Up to 2668 conditions per place. [2024-06-04 14:48:44,620 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 71 selfloop transitions, 26 changer transitions 0/102 dead transitions. [2024-06-04 14:48:44,621 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 77 places, 102 transitions, 792 flow [2024-06-04 14:48:44,621 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 14:48:44,622 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 14:48:44,622 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 144 transitions. [2024-06-04 14:48:44,622 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4675324675324675 [2024-06-04 14:48:44,623 INFO L175 Difference]: Start difference. First operand has 71 places, 72 transitions, 452 flow. Second operand 7 states and 144 transitions. [2024-06-04 14:48:44,623 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 77 places, 102 transitions, 792 flow [2024-06-04 14:48:44,644 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 74 places, 102 transitions, 744 flow, removed 15 selfloop flow, removed 3 redundant places. [2024-06-04 14:48:44,645 INFO L231 Difference]: Finished difference. Result has 75 places, 75 transitions, 498 flow [2024-06-04 14:48:44,645 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=408, PETRI_DIFFERENCE_MINUEND_PLACES=68, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=72, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=49, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=498, PETRI_PLACES=75, PETRI_TRANSITIONS=75} [2024-06-04 14:48:44,646 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 30 predicate places. [2024-06-04 14:48:44,646 INFO L495 AbstractCegarLoop]: Abstraction has has 75 places, 75 transitions, 498 flow [2024-06-04 14:48:44,646 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.5) internal successors, (92), 8 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:48:44,646 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:48:44,647 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:48:44,647 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-06-04 14:48:44,647 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 14:48:44,647 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:48:44,647 INFO L85 PathProgramCache]: Analyzing trace with hash -885936270, now seen corresponding path program 3 times [2024-06-04 14:48:44,648 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:48:44,648 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [235353901] [2024-06-04 14:48:44,648 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:48:44,648 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:48:44,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:48:45,831 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:48:45,832 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:48:45,832 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [235353901] [2024-06-04 14:48:45,832 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [235353901] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:48:45,832 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:48:45,832 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 14:48:45,833 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [107318622] [2024-06-04 14:48:45,833 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:48:45,833 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 14:48:45,833 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:48:45,834 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 14:48:45,834 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-04 14:48:45,935 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-04 14:48:45,936 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 75 places, 75 transitions, 498 flow. Second operand has 8 states, 8 states have (on average 11.5) internal successors, (92), 8 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:48:45,936 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:48:45,936 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-04 14:48:45,936 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:48:46,459 INFO L124 PetriNetUnfolderBase]: 1886/2928 cut-off events. [2024-06-04 14:48:46,459 INFO L125 PetriNetUnfolderBase]: For 22118/22118 co-relation queries the response was YES. [2024-06-04 14:48:46,466 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12426 conditions, 2928 events. 1886/2928 cut-off events. For 22118/22118 co-relation queries the response was YES. Maximal size of possible extension queue 127. Compared 14749 event pairs, 650 based on Foata normal form. 4/2931 useless extension candidates. Maximal degree in co-relation 12395. Up to 2749 conditions per place. [2024-06-04 14:48:46,476 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 77 selfloop transitions, 14 changer transitions 0/96 dead transitions. [2024-06-04 14:48:46,477 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 81 places, 96 transitions, 736 flow [2024-06-04 14:48:46,477 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 14:48:46,477 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 14:48:46,478 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 134 transitions. [2024-06-04 14:48:46,478 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43506493506493504 [2024-06-04 14:48:46,479 INFO L175 Difference]: Start difference. First operand has 75 places, 75 transitions, 498 flow. Second operand 7 states and 134 transitions. [2024-06-04 14:48:46,479 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 81 places, 96 transitions, 736 flow [2024-06-04 14:48:46,510 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 77 places, 96 transitions, 668 flow, removed 16 selfloop flow, removed 4 redundant places. [2024-06-04 14:48:46,512 INFO L231 Difference]: Finished difference. Result has 78 places, 75 transitions, 466 flow [2024-06-04 14:48:46,512 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=430, PETRI_DIFFERENCE_MINUEND_PLACES=71, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=75, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=61, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=466, PETRI_PLACES=78, PETRI_TRANSITIONS=75} [2024-06-04 14:48:46,512 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 33 predicate places. [2024-06-04 14:48:46,513 INFO L495 AbstractCegarLoop]: Abstraction has has 78 places, 75 transitions, 466 flow [2024-06-04 14:48:46,513 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.5) internal successors, (92), 8 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:48:46,513 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:48:46,513 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:48:46,513 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-06-04 14:48:46,514 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 14:48:46,514 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:48:46,514 INFO L85 PathProgramCache]: Analyzing trace with hash 367071370, now seen corresponding path program 1 times [2024-06-04 14:48:46,514 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:48:46,514 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1934307045] [2024-06-04 14:48:46,514 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:48:46,515 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:48:46,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:48:47,896 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:48:47,896 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:48:47,897 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1934307045] [2024-06-04 14:48:47,897 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1934307045] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:48:47,897 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:48:47,897 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 14:48:47,897 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1581458877] [2024-06-04 14:48:47,897 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:48:47,897 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 14:48:47,897 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:48:47,898 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 14:48:47,898 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-04 14:48:48,029 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-04 14:48:48,030 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 78 places, 75 transitions, 466 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) [2024-06-04 14:48:48,030 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:48:48,030 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-04 14:48:48,030 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:48:48,706 INFO L124 PetriNetUnfolderBase]: 2196/3377 cut-off events. [2024-06-04 14:48:48,706 INFO L125 PetriNetUnfolderBase]: For 29051/29051 co-relation queries the response was YES. [2024-06-04 14:48:48,714 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14240 conditions, 3377 events. 2196/3377 cut-off events. For 29051/29051 co-relation queries the response was YES. Maximal size of possible extension queue 141. Compared 16712 event pairs, 806 based on Foata normal form. 4/3380 useless extension candidates. Maximal degree in co-relation 14208. Up to 3176 conditions per place. [2024-06-04 14:48:48,726 INFO L140 encePairwiseOnDemand]: 35/44 looper letters, 76 selfloop transitions, 15 changer transitions 0/100 dead transitions. [2024-06-04 14:48:48,726 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 84 places, 100 transitions, 747 flow [2024-06-04 14:48:48,727 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 14:48:48,727 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 14:48:48,728 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 133 transitions. [2024-06-04 14:48:48,728 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4318181818181818 [2024-06-04 14:48:48,728 INFO L175 Difference]: Start difference. First operand has 78 places, 75 transitions, 466 flow. Second operand 7 states and 133 transitions. [2024-06-04 14:48:48,728 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 84 places, 100 transitions, 747 flow [2024-06-04 14:48:48,750 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 77 places, 100 transitions, 690 flow, removed 2 selfloop flow, removed 7 redundant places. [2024-06-04 14:48:48,751 INFO L231 Difference]: Finished difference. Result has 79 places, 80 transitions, 505 flow [2024-06-04 14:48:48,752 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=414, PETRI_DIFFERENCE_MINUEND_PLACES=71, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=75, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=62, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=505, PETRI_PLACES=79, PETRI_TRANSITIONS=80} [2024-06-04 14:48:48,752 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 34 predicate places. [2024-06-04 14:48:48,752 INFO L495 AbstractCegarLoop]: Abstraction has has 79 places, 80 transitions, 505 flow [2024-06-04 14:48:48,753 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) [2024-06-04 14:48:48,753 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:48:48,753 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:48:48,753 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-06-04 14:48:48,753 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 14:48:48,754 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:48:48,754 INFO L85 PathProgramCache]: Analyzing trace with hash -592360166, now seen corresponding path program 1 times [2024-06-04 14:48:48,754 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:48:48,754 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1466427497] [2024-06-04 14:48:48,754 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:48:48,755 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:48:48,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:48:49,576 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:48:49,577 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:48:49,577 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1466427497] [2024-06-04 14:48:49,577 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1466427497] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:48:49,577 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:48:49,577 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-04 14:48:49,578 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1500995366] [2024-06-04 14:48:49,578 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:48:49,578 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-04 14:48:49,578 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:48:49,579 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-04 14:48:49,579 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-06-04 14:48:49,650 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-04 14:48:49,651 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 79 places, 80 transitions, 505 flow. Second operand has 6 states, 6 states have (on average 12.166666666666666) internal successors, (73), 6 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:48:49,651 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:48:49,651 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-04 14:48:49,651 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:48:50,231 INFO L124 PetriNetUnfolderBase]: 2377/3627 cut-off events. [2024-06-04 14:48:50,231 INFO L125 PetriNetUnfolderBase]: For 37859/37859 co-relation queries the response was YES. [2024-06-04 14:48:50,243 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16287 conditions, 3627 events. 2377/3627 cut-off events. For 37859/37859 co-relation queries the response was YES. Maximal size of possible extension queue 149. Compared 17825 event pairs, 981 based on Foata normal form. 1/3627 useless extension candidates. Maximal degree in co-relation 16253. Up to 3524 conditions per place. [2024-06-04 14:48:50,253 INFO L140 encePairwiseOnDemand]: 37/44 looper letters, 73 selfloop transitions, 8 changer transitions 0/91 dead transitions. [2024-06-04 14:48:50,254 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 83 places, 91 transitions, 711 flow [2024-06-04 14:48:50,254 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-04 14:48:50,254 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-04 14:48:50,254 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 94 transitions. [2024-06-04 14:48:50,255 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42727272727272725 [2024-06-04 14:48:50,255 INFO L175 Difference]: Start difference. First operand has 79 places, 80 transitions, 505 flow. Second operand 5 states and 94 transitions. [2024-06-04 14:48:50,255 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 83 places, 91 transitions, 711 flow [2024-06-04 14:48:50,275 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 79 places, 91 transitions, 664 flow, removed 11 selfloop flow, removed 4 redundant places. [2024-06-04 14:48:50,277 INFO L231 Difference]: Finished difference. Result has 80 places, 83 transitions, 510 flow [2024-06-04 14:48:50,277 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=458, PETRI_DIFFERENCE_MINUEND_PLACES=75, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=80, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=72, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=510, PETRI_PLACES=80, PETRI_TRANSITIONS=83} [2024-06-04 14:48:50,278 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 35 predicate places. [2024-06-04 14:48:50,278 INFO L495 AbstractCegarLoop]: Abstraction has has 80 places, 83 transitions, 510 flow [2024-06-04 14:48:50,278 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 12.166666666666666) internal successors, (73), 6 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:48:50,279 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:48:50,279 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:48:50,279 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-06-04 14:48:50,279 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 14:48:50,279 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:48:50,279 INFO L85 PathProgramCache]: Analyzing trace with hash -1090863393, now seen corresponding path program 1 times [2024-06-04 14:48:50,280 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:48:50,280 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2068791597] [2024-06-04 14:48:50,280 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:48:50,280 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:48:50,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:48:51,565 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:48:51,566 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:48:51,566 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2068791597] [2024-06-04 14:48:51,566 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2068791597] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:48:51,566 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:48:51,566 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 14:48:51,566 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [799503864] [2024-06-04 14:48:51,566 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:48:51,567 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 14:48:51,567 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:48:51,567 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 14:48:51,567 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-04 14:48:51,700 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-04 14:48:51,701 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 80 places, 83 transitions, 510 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) [2024-06-04 14:48:51,701 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:48:51,701 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-04 14:48:51,701 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:48:52,408 INFO L124 PetriNetUnfolderBase]: 2299/3511 cut-off events. [2024-06-04 14:48:52,409 INFO L125 PetriNetUnfolderBase]: For 41532/41538 co-relation queries the response was YES. [2024-06-04 14:48:52,417 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16392 conditions, 3511 events. 2299/3511 cut-off events. For 41532/41538 co-relation queries the response was YES. Maximal size of possible extension queue 154. Compared 17882 event pairs, 769 based on Foata normal form. 4/3492 useless extension candidates. Maximal degree in co-relation 16357. Up to 3117 conditions per place. [2024-06-04 14:48:52,427 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 83 selfloop transitions, 37 changer transitions 0/127 dead transitions. [2024-06-04 14:48:52,427 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 87 places, 127 transitions, 974 flow [2024-06-04 14:48:52,428 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 14:48:52,428 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 14:48:52,428 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 168 transitions. [2024-06-04 14:48:52,429 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4772727272727273 [2024-06-04 14:48:52,429 INFO L175 Difference]: Start difference. First operand has 80 places, 83 transitions, 510 flow. Second operand 8 states and 168 transitions. [2024-06-04 14:48:52,429 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 87 places, 127 transitions, 974 flow [2024-06-04 14:48:52,453 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 84 places, 127 transitions, 944 flow, removed 9 selfloop flow, removed 3 redundant places. [2024-06-04 14:48:52,455 INFO L231 Difference]: Finished difference. Result has 85 places, 89 transitions, 636 flow [2024-06-04 14:48:52,455 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=480, PETRI_DIFFERENCE_MINUEND_PLACES=77, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=83, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=49, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=636, PETRI_PLACES=85, PETRI_TRANSITIONS=89} [2024-06-04 14:48:52,455 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 40 predicate places. [2024-06-04 14:48:52,456 INFO L495 AbstractCegarLoop]: Abstraction has has 85 places, 89 transitions, 636 flow [2024-06-04 14:48:52,456 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) [2024-06-04 14:48:52,456 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:48:52,456 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:48:52,456 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-06-04 14:48:52,456 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 14:48:52,457 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:48:52,457 INFO L85 PathProgramCache]: Analyzing trace with hash 2032986687, now seen corresponding path program 2 times [2024-06-04 14:48:52,457 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:48:52,457 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1035288800] [2024-06-04 14:48:52,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:48:52,458 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:48:52,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:48:53,822 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:48:53,823 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:48:53,823 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1035288800] [2024-06-04 14:48:53,823 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1035288800] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:48:53,823 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:48:53,823 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 14:48:53,823 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [811978376] [2024-06-04 14:48:53,823 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:48:53,824 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 14:48:53,824 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:48:53,825 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 14:48:53,825 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-04 14:48:53,928 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-04 14:48:53,928 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 85 places, 89 transitions, 636 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) [2024-06-04 14:48:53,928 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:48:53,928 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-04 14:48:53,929 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:48:54,556 INFO L124 PetriNetUnfolderBase]: 2489/3803 cut-off events. [2024-06-04 14:48:54,557 INFO L125 PetriNetUnfolderBase]: For 52324/52345 co-relation queries the response was YES. [2024-06-04 14:48:54,565 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18820 conditions, 3803 events. 2489/3803 cut-off events. For 52324/52345 co-relation queries the response was YES. Maximal size of possible extension queue 155. Compared 19635 event pairs, 1147 based on Foata normal form. 4/3766 useless extension candidates. Maximal degree in co-relation 18784. Up to 3400 conditions per place. [2024-06-04 14:48:54,576 INFO L140 encePairwiseOnDemand]: 31/44 looper letters, 101 selfloop transitions, 40 changer transitions 0/148 dead transitions. [2024-06-04 14:48:54,576 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 93 places, 148 transitions, 1329 flow [2024-06-04 14:48:54,576 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 14:48:54,577 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 14:48:54,578 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 173 transitions. [2024-06-04 14:48:54,579 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43686868686868685 [2024-06-04 14:48:54,579 INFO L175 Difference]: Start difference. First operand has 85 places, 89 transitions, 636 flow. Second operand 9 states and 173 transitions. [2024-06-04 14:48:54,579 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 93 places, 148 transitions, 1329 flow [2024-06-04 14:48:54,619 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 89 places, 148 transitions, 1195 flow, removed 41 selfloop flow, removed 4 redundant places. [2024-06-04 14:48:54,621 INFO L231 Difference]: Finished difference. Result has 94 places, 115 transitions, 919 flow [2024-06-04 14:48:54,621 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=563, PETRI_DIFFERENCE_MINUEND_PLACES=81, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=89, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=919, PETRI_PLACES=94, PETRI_TRANSITIONS=115} [2024-06-04 14:48:54,622 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 49 predicate places. [2024-06-04 14:48:54,622 INFO L495 AbstractCegarLoop]: Abstraction has has 94 places, 115 transitions, 919 flow [2024-06-04 14:48:54,622 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) [2024-06-04 14:48:54,622 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:48:54,622 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:48:54,623 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-06-04 14:48:54,623 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 14:48:54,623 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:48:54,623 INFO L85 PathProgramCache]: Analyzing trace with hash 382592059, now seen corresponding path program 3 times [2024-06-04 14:48:54,623 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:48:54,624 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [91025534] [2024-06-04 14:48:54,624 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:48:54,624 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:48:54,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:48:55,506 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:48:55,507 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:48:55,507 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [91025534] [2024-06-04 14:48:55,507 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [91025534] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:48:55,507 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:48:55,507 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 14:48:55,507 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [408273602] [2024-06-04 14:48:55,507 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:48:55,508 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 14:48:55,508 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:48:55,508 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 14:48:55,508 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2024-06-04 14:48:55,632 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-04 14:48:55,633 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 94 places, 115 transitions, 919 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) [2024-06-04 14:48:55,633 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:48:55,633 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-04 14:48:55,633 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:48:56,500 INFO L124 PetriNetUnfolderBase]: 2775/4245 cut-off events. [2024-06-04 14:48:56,500 INFO L125 PetriNetUnfolderBase]: For 56566/56580 co-relation queries the response was YES. [2024-06-04 14:48:56,510 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21380 conditions, 4245 events. 2775/4245 cut-off events. For 56566/56580 co-relation queries the response was YES. Maximal size of possible extension queue 161. Compared 22137 event pairs, 795 based on Foata normal form. 10/4231 useless extension candidates. Maximal degree in co-relation 21338. Up to 3593 conditions per place. [2024-06-04 14:48:56,523 INFO L140 encePairwiseOnDemand]: 30/44 looper letters, 134 selfloop transitions, 98 changer transitions 0/239 dead transitions. [2024-06-04 14:48:56,524 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 102 places, 239 transitions, 2411 flow [2024-06-04 14:48:56,524 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 14:48:56,524 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 14:48:56,525 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 186 transitions. [2024-06-04 14:48:56,526 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4696969696969697 [2024-06-04 14:48:56,526 INFO L175 Difference]: Start difference. First operand has 94 places, 115 transitions, 919 flow. Second operand 9 states and 186 transitions. [2024-06-04 14:48:56,526 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 102 places, 239 transitions, 2411 flow [2024-06-04 14:48:56,580 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 101 places, 239 transitions, 2331 flow, removed 39 selfloop flow, removed 1 redundant places. [2024-06-04 14:48:56,583 INFO L231 Difference]: Finished difference. Result has 106 places, 193 transitions, 1989 flow [2024-06-04 14:48:56,583 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=897, PETRI_DIFFERENCE_MINUEND_PLACES=93, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=115, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=55, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1989, PETRI_PLACES=106, PETRI_TRANSITIONS=193} [2024-06-04 14:48:56,584 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 61 predicate places. [2024-06-04 14:48:56,584 INFO L495 AbstractCegarLoop]: Abstraction has has 106 places, 193 transitions, 1989 flow [2024-06-04 14:48:56,584 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) [2024-06-04 14:48:56,584 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:48:56,584 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:48:56,585 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-06-04 14:48:56,585 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 14:48:56,585 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:48:56,585 INFO L85 PathProgramCache]: Analyzing trace with hash 186438189, now seen corresponding path program 4 times [2024-06-04 14:48:56,585 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:48:56,586 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1372608296] [2024-06-04 14:48:56,586 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:48:56,586 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:48:56,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:48:57,531 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:48:57,532 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:48:57,532 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1372608296] [2024-06-04 14:48:57,532 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1372608296] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:48:57,532 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:48:57,532 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 14:48:57,532 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1703409553] [2024-06-04 14:48:57,532 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:48:57,532 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 14:48:57,533 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:48:57,533 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 14:48:57,533 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2024-06-04 14:48:57,642 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-04 14:48:57,642 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 106 places, 193 transitions, 1989 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) [2024-06-04 14:48:57,642 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:48:57,642 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-04 14:48:57,642 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:48:58,718 INFO L124 PetriNetUnfolderBase]: 3078/4705 cut-off events. [2024-06-04 14:48:58,718 INFO L125 PetriNetUnfolderBase]: For 68926/68943 co-relation queries the response was YES. [2024-06-04 14:48:58,733 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26389 conditions, 4705 events. 3078/4705 cut-off events. For 68926/68943 co-relation queries the response was YES. Maximal size of possible extension queue 203. Compared 25044 event pairs, 796 based on Foata normal form. 14/4697 useless extension candidates. Maximal degree in co-relation 26340. Up to 3741 conditions per place. [2024-06-04 14:48:58,815 INFO L140 encePairwiseOnDemand]: 30/44 looper letters, 138 selfloop transitions, 172 changer transitions 0/317 dead transitions. [2024-06-04 14:48:58,815 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 114 places, 317 transitions, 3885 flow [2024-06-04 14:48:58,816 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 14:48:58,816 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 14:48:58,816 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 190 transitions. [2024-06-04 14:48:58,817 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4797979797979798 [2024-06-04 14:48:58,817 INFO L175 Difference]: Start difference. First operand has 106 places, 193 transitions, 1989 flow. Second operand 9 states and 190 transitions. [2024-06-04 14:48:58,817 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 114 places, 317 transitions, 3885 flow [2024-06-04 14:48:58,883 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 112 places, 317 transitions, 3812 flow, removed 31 selfloop flow, removed 2 redundant places. [2024-06-04 14:48:58,890 INFO L231 Difference]: Finished difference. Result has 117 places, 264 transitions, 3397 flow [2024-06-04 14:48:58,890 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=1948, PETRI_DIFFERENCE_MINUEND_PLACES=104, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=193, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=101, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=56, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3397, PETRI_PLACES=117, PETRI_TRANSITIONS=264} [2024-06-04 14:48:58,891 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 72 predicate places. [2024-06-04 14:48:58,891 INFO L495 AbstractCegarLoop]: Abstraction has has 117 places, 264 transitions, 3397 flow [2024-06-04 14:48:58,891 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) [2024-06-04 14:48:58,891 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:48:58,892 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:48:58,892 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2024-06-04 14:48:58,892 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 14:48:58,892 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:48:58,893 INFO L85 PathProgramCache]: Analyzing trace with hash 1531703649, now seen corresponding path program 5 times [2024-06-04 14:48:58,893 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:48:58,893 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1369335960] [2024-06-04 14:48:58,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:48:58,893 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:48:58,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:48:59,839 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:48:59,839 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:48:59,839 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1369335960] [2024-06-04 14:48:59,839 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1369335960] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:48:59,839 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:48:59,840 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 14:48:59,840 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1883273977] [2024-06-04 14:48:59,840 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:48:59,840 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 14:48:59,840 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:48:59,841 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 14:48:59,841 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2024-06-04 14:48:59,941 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-04 14:48:59,941 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 117 places, 264 transitions, 3397 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) [2024-06-04 14:48:59,941 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:48:59,941 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-04 14:48:59,941 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:49:00,963 INFO L124 PetriNetUnfolderBase]: 3032/4642 cut-off events. [2024-06-04 14:49:00,963 INFO L125 PetriNetUnfolderBase]: For 75836/75869 co-relation queries the response was YES. [2024-06-04 14:49:00,979 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27538 conditions, 4642 events. 3032/4642 cut-off events. For 75836/75869 co-relation queries the response was YES. Maximal size of possible extension queue 200. Compared 24731 event pairs, 850 based on Foata normal form. 34/4653 useless extension candidates. Maximal degree in co-relation 27483. Up to 3703 conditions per place. [2024-06-04 14:49:00,996 INFO L140 encePairwiseOnDemand]: 30/44 looper letters, 139 selfloop transitions, 182 changer transitions 0/328 dead transitions. [2024-06-04 14:49:00,996 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 125 places, 328 transitions, 4623 flow [2024-06-04 14:49:00,996 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 14:49:00,996 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 14:49:00,997 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 186 transitions. [2024-06-04 14:49:00,997 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4696969696969697 [2024-06-04 14:49:00,997 INFO L175 Difference]: Start difference. First operand has 117 places, 264 transitions, 3397 flow. Second operand 9 states and 186 transitions. [2024-06-04 14:49:00,998 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 125 places, 328 transitions, 4623 flow [2024-06-04 14:49:01,105 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 122 places, 328 transitions, 4397 flow, removed 29 selfloop flow, removed 3 redundant places. [2024-06-04 14:49:01,110 INFO L231 Difference]: Finished difference. Result has 126 places, 279 transitions, 3950 flow [2024-06-04 14:49:01,110 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=3182, PETRI_DIFFERENCE_MINUEND_PLACES=114, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=264, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=167, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=93, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3950, PETRI_PLACES=126, PETRI_TRANSITIONS=279} [2024-06-04 14:49:01,111 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 81 predicate places. [2024-06-04 14:49:01,111 INFO L495 AbstractCegarLoop]: Abstraction has has 126 places, 279 transitions, 3950 flow [2024-06-04 14:49:01,111 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) [2024-06-04 14:49:01,111 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:49:01,111 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:49:01,112 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2024-06-04 14:49:01,112 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 14:49:01,112 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:49:01,112 INFO L85 PathProgramCache]: Analyzing trace with hash 2038550877, now seen corresponding path program 6 times [2024-06-04 14:49:01,113 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:49:01,113 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [896731491] [2024-06-04 14:49:01,113 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:49:01,113 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:49:01,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:49:02,346 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:49:02,346 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:49:02,346 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [896731491] [2024-06-04 14:49:02,346 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [896731491] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:49:02,346 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:49:02,347 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 14:49:02,347 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [108035421] [2024-06-04 14:49:02,347 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:49:02,347 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 14:49:02,347 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:49:02,348 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 14:49:02,348 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-04 14:49:02,463 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-04 14:49:02,463 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 126 places, 279 transitions, 3950 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) [2024-06-04 14:49:02,463 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:49:02,463 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-04 14:49:02,463 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:49:03,269 INFO L124 PetriNetUnfolderBase]: 3163/4833 cut-off events. [2024-06-04 14:49:03,270 INFO L125 PetriNetUnfolderBase]: For 93276/93305 co-relation queries the response was YES. [2024-06-04 14:49:03,288 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30338 conditions, 4833 events. 3163/4833 cut-off events. For 93276/93305 co-relation queries the response was YES. Maximal size of possible extension queue 216. Compared 25848 event pairs, 1231 based on Foata normal form. 9/4798 useless extension candidates. Maximal degree in co-relation 30279. Up to 4055 conditions per place. [2024-06-04 14:49:03,307 INFO L140 encePairwiseOnDemand]: 31/44 looper letters, 186 selfloop transitions, 145 changer transitions 0/338 dead transitions. [2024-06-04 14:49:03,307 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 134 places, 338 transitions, 5229 flow [2024-06-04 14:49:03,308 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 14:49:03,308 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 14:49:03,308 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 173 transitions. [2024-06-04 14:49:03,309 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43686868686868685 [2024-06-04 14:49:03,309 INFO L175 Difference]: Start difference. First operand has 126 places, 279 transitions, 3950 flow. Second operand 9 states and 173 transitions. [2024-06-04 14:49:03,309 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 134 places, 338 transitions, 5229 flow [2024-06-04 14:49:03,425 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 130 places, 338 transitions, 4919 flow, removed 46 selfloop flow, removed 4 redundant places. [2024-06-04 14:49:03,429 INFO L231 Difference]: Finished difference. Result has 133 places, 294 transitions, 4328 flow [2024-06-04 14:49:03,430 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=3664, PETRI_DIFFERENCE_MINUEND_PLACES=122, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=279, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=130, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=147, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4328, PETRI_PLACES=133, PETRI_TRANSITIONS=294} [2024-06-04 14:49:03,430 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 88 predicate places. [2024-06-04 14:49:03,430 INFO L495 AbstractCegarLoop]: Abstraction has has 133 places, 294 transitions, 4328 flow [2024-06-04 14:49:03,430 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) [2024-06-04 14:49:03,430 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:49:03,431 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:49:03,431 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2024-06-04 14:49:03,431 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 14:49:03,431 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:49:03,431 INFO L85 PathProgramCache]: Analyzing trace with hash -1684688179, now seen corresponding path program 1 times [2024-06-04 14:49:03,431 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:49:03,432 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [618182337] [2024-06-04 14:49:03,432 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:49:03,432 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:49:03,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:49:04,635 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:49:04,635 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:49:04,635 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [618182337] [2024-06-04 14:49:04,635 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [618182337] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:49:04,635 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:49:04,635 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 14:49:04,635 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [926374502] [2024-06-04 14:49:04,635 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:49:04,636 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 14:49:04,636 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:49:04,636 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 14:49:04,636 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2024-06-04 14:49:04,747 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-04 14:49:04,747 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 133 places, 294 transitions, 4328 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) [2024-06-04 14:49:04,747 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:49:04,747 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-04 14:49:04,747 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:49:05,654 INFO L124 PetriNetUnfolderBase]: 3267/4925 cut-off events. [2024-06-04 14:49:05,654 INFO L125 PetriNetUnfolderBase]: For 109742/109904 co-relation queries the response was YES. [2024-06-04 14:49:05,671 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32019 conditions, 4925 events. 3267/4925 cut-off events. For 109742/109904 co-relation queries the response was YES. Maximal size of possible extension queue 201. Compared 25309 event pairs, 1352 based on Foata normal form. 89/4940 useless extension candidates. Maximal degree in co-relation 31957. Up to 4596 conditions per place. [2024-06-04 14:49:05,689 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 284 selfloop transitions, 27 changer transitions 0/328 dead transitions. [2024-06-04 14:49:05,689 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 139 places, 328 transitions, 5250 flow [2024-06-04 14:49:05,690 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 14:49:05,690 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 14:49:05,691 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 134 transitions. [2024-06-04 14:49:05,691 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43506493506493504 [2024-06-04 14:49:05,691 INFO L175 Difference]: Start difference. First operand has 133 places, 294 transitions, 4328 flow. Second operand 7 states and 134 transitions. [2024-06-04 14:49:05,691 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 139 places, 328 transitions, 5250 flow [2024-06-04 14:49:05,830 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 134 places, 328 transitions, 4988 flow, removed 46 selfloop flow, removed 5 redundant places. [2024-06-04 14:49:05,834 INFO L231 Difference]: Finished difference. Result has 135 places, 307 transitions, 4379 flow [2024-06-04 14:49:05,834 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=4072, PETRI_DIFFERENCE_MINUEND_PLACES=128, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=294, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=267, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4379, PETRI_PLACES=135, PETRI_TRANSITIONS=307} [2024-06-04 14:49:05,835 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 90 predicate places. [2024-06-04 14:49:05,835 INFO L495 AbstractCegarLoop]: Abstraction has has 135 places, 307 transitions, 4379 flow [2024-06-04 14:49:05,835 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) [2024-06-04 14:49:05,835 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:49:05,835 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:49:05,835 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2024-06-04 14:49:05,835 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 14:49:05,836 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:49:05,836 INFO L85 PathProgramCache]: Analyzing trace with hash -1515230869, now seen corresponding path program 7 times [2024-06-04 14:49:05,836 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:49:05,836 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1383903354] [2024-06-04 14:49:05,836 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:49:05,837 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:49:05,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:49:06,903 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:49:06,903 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:49:06,904 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1383903354] [2024-06-04 14:49:06,904 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1383903354] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:49:06,904 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:49:06,904 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 14:49:06,904 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1380729417] [2024-06-04 14:49:06,904 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:49:06,905 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 14:49:06,905 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:49:06,905 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 14:49:06,905 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-04 14:49:07,037 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-04 14:49:07,037 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 135 places, 307 transitions, 4379 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) [2024-06-04 14:49:07,037 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:49:07,037 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-04 14:49:07,037 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:49:07,927 INFO L124 PetriNetUnfolderBase]: 3164/4832 cut-off events. [2024-06-04 14:49:07,927 INFO L125 PetriNetUnfolderBase]: For 105798/105821 co-relation queries the response was YES. [2024-06-04 14:49:07,950 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30687 conditions, 4832 events. 3164/4832 cut-off events. For 105798/105821 co-relation queries the response was YES. Maximal size of possible extension queue 221. Compared 25900 event pairs, 1240 based on Foata normal form. 13/4807 useless extension candidates. Maximal degree in co-relation 30624. Up to 4378 conditions per place. [2024-06-04 14:49:07,968 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 280 selfloop transitions, 53 changer transitions 0/340 dead transitions. [2024-06-04 14:49:07,969 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 142 places, 340 transitions, 5213 flow [2024-06-04 14:49:07,970 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 14:49:07,970 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 14:49:07,970 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 152 transitions. [2024-06-04 14:49:07,970 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4318181818181818 [2024-06-04 14:49:07,971 INFO L175 Difference]: Start difference. First operand has 135 places, 307 transitions, 4379 flow. Second operand 8 states and 152 transitions. [2024-06-04 14:49:07,971 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 142 places, 340 transitions, 5213 flow [2024-06-04 14:49:08,118 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 137 places, 340 transitions, 5078 flow, removed 48 selfloop flow, removed 5 redundant places. [2024-06-04 14:49:08,123 INFO L231 Difference]: Finished difference. Result has 138 places, 307 transitions, 4368 flow [2024-06-04 14:49:08,123 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=4244, PETRI_DIFFERENCE_MINUEND_PLACES=130, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=307, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=53, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=254, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4368, PETRI_PLACES=138, PETRI_TRANSITIONS=307} [2024-06-04 14:49:08,124 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 93 predicate places. [2024-06-04 14:49:08,124 INFO L495 AbstractCegarLoop]: Abstraction has has 138 places, 307 transitions, 4368 flow [2024-06-04 14:49:08,124 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) [2024-06-04 14:49:08,124 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:49:08,124 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:49:08,124 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2024-06-04 14:49:08,124 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 14:49:08,125 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:49:08,125 INFO L85 PathProgramCache]: Analyzing trace with hash -1183294850, now seen corresponding path program 1 times [2024-06-04 14:49:08,125 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:49:08,125 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [921053357] [2024-06-04 14:49:08,125 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:49:08,125 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:49:08,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:49:08,944 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:49:08,944 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:49:08,944 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [921053357] [2024-06-04 14:49:08,945 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [921053357] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:49:08,945 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:49:08,945 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-04 14:49:08,945 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [647728758] [2024-06-04 14:49:08,945 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:49:08,945 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-04 14:49:08,945 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:49:08,946 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-04 14:49:08,946 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-04 14:49:09,005 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-04 14:49:09,006 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 138 places, 307 transitions, 4368 flow. Second operand has 7 states, 7 states have (on average 12.0) internal successors, (84), 7 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:49:09,006 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:49:09,006 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-04 14:49:09,006 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:49:09,910 INFO L124 PetriNetUnfolderBase]: 3146/4823 cut-off events. [2024-06-04 14:49:09,910 INFO L125 PetriNetUnfolderBase]: For 112951/113107 co-relation queries the response was YES. [2024-06-04 14:49:09,931 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30335 conditions, 4823 events. 3146/4823 cut-off events. For 112951/113107 co-relation queries the response was YES. Maximal size of possible extension queue 193. Compared 25092 event pairs, 1470 based on Foata normal form. 95/4906 useless extension candidates. Maximal degree in co-relation 30271. Up to 4471 conditions per place. [2024-06-04 14:49:09,949 INFO L140 encePairwiseOnDemand]: 36/44 looper letters, 248 selfloop transitions, 12 changer transitions 0/320 dead transitions. [2024-06-04 14:49:09,949 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 143 places, 320 transitions, 4944 flow [2024-06-04 14:49:09,950 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-04 14:49:09,950 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-04 14:49:09,950 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 110 transitions. [2024-06-04 14:49:09,950 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4166666666666667 [2024-06-04 14:49:09,951 INFO L175 Difference]: Start difference. First operand has 138 places, 307 transitions, 4368 flow. Second operand 6 states and 110 transitions. [2024-06-04 14:49:09,951 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 143 places, 320 transitions, 4944 flow [2024-06-04 14:49:10,204 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 135 places, 320 transitions, 4717 flow, removed 8 selfloop flow, removed 8 redundant places. [2024-06-04 14:49:10,209 INFO L231 Difference]: Finished difference. Result has 136 places, 310 transitions, 4205 flow [2024-06-04 14:49:10,209 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=4141, PETRI_DIFFERENCE_MINUEND_PLACES=130, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=307, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=295, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=4205, PETRI_PLACES=136, PETRI_TRANSITIONS=310} [2024-06-04 14:49:10,209 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 91 predicate places. [2024-06-04 14:49:10,210 INFO L495 AbstractCegarLoop]: Abstraction has has 136 places, 310 transitions, 4205 flow [2024-06-04 14:49:10,210 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 12.0) internal successors, (84), 7 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:49:10,210 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:49:10,210 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:49:10,210 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2024-06-04 14:49:10,210 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 14:49:10,211 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:49:10,211 INFO L85 PathProgramCache]: Analyzing trace with hash -1325343017, now seen corresponding path program 1 times [2024-06-04 14:49:10,211 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:49:10,211 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [568491442] [2024-06-04 14:49:10,212 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:49:10,212 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:49:10,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:49:11,159 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:49:11,159 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:49:11,159 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [568491442] [2024-06-04 14:49:11,159 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [568491442] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:49:11,159 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:49:11,159 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 14:49:11,159 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2068909889] [2024-06-04 14:49:11,159 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:49:11,160 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 14:49:11,160 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:49:11,160 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 14:49:11,161 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-04 14:49:11,277 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-04 14:49:11,278 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 136 places, 310 transitions, 4205 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) [2024-06-04 14:49:11,278 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:49:11,278 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-04 14:49:11,278 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:49:12,369 INFO L124 PetriNetUnfolderBase]: 3233/4957 cut-off events. [2024-06-04 14:49:12,369 INFO L125 PetriNetUnfolderBase]: For 115850/115892 co-relation queries the response was YES. [2024-06-04 14:49:12,387 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31829 conditions, 4957 events. 3233/4957 cut-off events. For 115850/115892 co-relation queries the response was YES. Maximal size of possible extension queue 229. Compared 26901 event pairs, 1077 based on Foata normal form. 17/4947 useless extension candidates. Maximal degree in co-relation 31765. Up to 4501 conditions per place. [2024-06-04 14:49:12,404 INFO L140 encePairwiseOnDemand]: 30/44 looper letters, 297 selfloop transitions, 67 changer transitions 0/371 dead transitions. [2024-06-04 14:49:12,404 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 145 places, 371 transitions, 5333 flow [2024-06-04 14:49:12,405 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-04 14:49:12,405 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-04 14:49:12,405 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 197 transitions. [2024-06-04 14:49:12,406 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44772727272727275 [2024-06-04 14:49:12,406 INFO L175 Difference]: Start difference. First operand has 136 places, 310 transitions, 4205 flow. Second operand 10 states and 197 transitions. [2024-06-04 14:49:12,406 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 145 places, 371 transitions, 5333 flow [2024-06-04 14:49:12,530 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 141 places, 371 transitions, 5291 flow, removed 11 selfloop flow, removed 4 redundant places. [2024-06-04 14:49:12,534 INFO L231 Difference]: Finished difference. Result has 145 places, 333 transitions, 4642 flow [2024-06-04 14:49:12,534 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=4163, PETRI_DIFFERENCE_MINUEND_PLACES=132, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=310, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=44, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=255, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=4642, PETRI_PLACES=145, PETRI_TRANSITIONS=333} [2024-06-04 14:49:12,535 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 100 predicate places. [2024-06-04 14:49:12,535 INFO L495 AbstractCegarLoop]: Abstraction has has 145 places, 333 transitions, 4642 flow [2024-06-04 14:49:12,535 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) [2024-06-04 14:49:12,535 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:49:12,535 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:49:12,535 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2024-06-04 14:49:12,535 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 14:49:12,536 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:49:12,536 INFO L85 PathProgramCache]: Analyzing trace with hash -434528045, now seen corresponding path program 2 times [2024-06-04 14:49:12,536 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:49:12,536 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [939539809] [2024-06-04 14:49:12,536 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:49:12,536 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:49:12,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:49:13,391 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:49:13,392 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:49:13,392 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [939539809] [2024-06-04 14:49:13,392 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [939539809] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:49:13,392 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:49:13,392 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 14:49:13,392 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1059866458] [2024-06-04 14:49:13,392 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:49:13,392 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 14:49:13,392 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:49:13,393 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 14:49:13,393 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-04 14:49:13,546 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-04 14:49:13,547 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 145 places, 333 transitions, 4642 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) [2024-06-04 14:49:13,547 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:49:13,547 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-04 14:49:13,547 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:49:14,587 INFO L124 PetriNetUnfolderBase]: 3358/5133 cut-off events. [2024-06-04 14:49:14,587 INFO L125 PetriNetUnfolderBase]: For 130860/130913 co-relation queries the response was YES. [2024-06-04 14:49:14,609 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34194 conditions, 5133 events. 3358/5133 cut-off events. For 130860/130913 co-relation queries the response was YES. Maximal size of possible extension queue 237. Compared 28043 event pairs, 1122 based on Foata normal form. 25/5118 useless extension candidates. Maximal degree in co-relation 34126. Up to 4654 conditions per place. [2024-06-04 14:49:14,628 INFO L140 encePairwiseOnDemand]: 30/44 looper letters, 303 selfloop transitions, 84 changer transitions 0/394 dead transitions. [2024-06-04 14:49:14,628 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 154 places, 394 transitions, 5841 flow [2024-06-04 14:49:14,629 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-04 14:49:14,629 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-04 14:49:14,630 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 197 transitions. [2024-06-04 14:49:14,630 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44772727272727275 [2024-06-04 14:49:14,630 INFO L175 Difference]: Start difference. First operand has 145 places, 333 transitions, 4642 flow. Second operand 10 states and 197 transitions. [2024-06-04 14:49:14,630 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 154 places, 394 transitions, 5841 flow [2024-06-04 14:49:14,830 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 150 places, 394 transitions, 5674 flow, removed 43 selfloop flow, removed 4 redundant places. [2024-06-04 14:49:14,835 INFO L231 Difference]: Finished difference. Result has 153 places, 355 transitions, 4998 flow [2024-06-04 14:49:14,835 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=4523, PETRI_DIFFERENCE_MINUEND_PLACES=141, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=333, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=62, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=260, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=4998, PETRI_PLACES=153, PETRI_TRANSITIONS=355} [2024-06-04 14:49:14,835 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 108 predicate places. [2024-06-04 14:49:14,835 INFO L495 AbstractCegarLoop]: Abstraction has has 153 places, 355 transitions, 4998 flow [2024-06-04 14:49:14,835 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) [2024-06-04 14:49:14,836 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:49:14,836 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:49:14,836 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2024-06-04 14:49:14,836 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 14:49:14,836 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:49:14,837 INFO L85 PathProgramCache]: Analyzing trace with hash -1048214427, now seen corresponding path program 3 times [2024-06-04 14:49:14,837 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:49:14,837 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1988750798] [2024-06-04 14:49:14,837 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:49:14,837 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:49:14,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:49:15,568 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:49:15,569 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:49:15,569 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1988750798] [2024-06-04 14:49:15,569 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1988750798] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:49:15,569 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:49:15,569 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 14:49:15,569 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1387483892] [2024-06-04 14:49:15,569 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:49:15,569 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 14:49:15,570 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:49:15,570 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 14:49:15,570 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2024-06-04 14:49:15,717 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-04 14:49:15,717 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 153 places, 355 transitions, 4998 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) [2024-06-04 14:49:15,717 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:49:15,717 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-04 14:49:15,717 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:49:16,867 INFO L124 PetriNetUnfolderBase]: 3481/5335 cut-off events. [2024-06-04 14:49:16,867 INFO L125 PetriNetUnfolderBase]: For 145203/145253 co-relation queries the response was YES. [2024-06-04 14:49:16,896 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36331 conditions, 5335 events. 3481/5335 cut-off events. For 145203/145253 co-relation queries the response was YES. Maximal size of possible extension queue 257. Compared 29409 event pairs, 1108 based on Foata normal form. 21/5317 useless extension candidates. Maximal degree in co-relation 36260. Up to 4760 conditions per place. [2024-06-04 14:49:16,919 INFO L140 encePairwiseOnDemand]: 29/44 looper letters, 316 selfloop transitions, 114 changer transitions 0/437 dead transitions. [2024-06-04 14:49:16,919 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 164 places, 437 transitions, 6629 flow [2024-06-04 14:49:16,920 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-04 14:49:16,920 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-04 14:49:16,920 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 233 transitions. [2024-06-04 14:49:16,921 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4412878787878788 [2024-06-04 14:49:16,921 INFO L175 Difference]: Start difference. First operand has 153 places, 355 transitions, 4998 flow. Second operand 12 states and 233 transitions. [2024-06-04 14:49:16,921 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 164 places, 437 transitions, 6629 flow [2024-06-04 14:49:17,147 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 159 places, 437 transitions, 6383 flow, removed 67 selfloop flow, removed 5 redundant places. [2024-06-04 14:49:17,154 INFO L231 Difference]: Finished difference. Result has 162 places, 388 transitions, 5496 flow [2024-06-04 14:49:17,155 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=4862, PETRI_DIFFERENCE_MINUEND_PLACES=148, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=355, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=90, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=260, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=5496, PETRI_PLACES=162, PETRI_TRANSITIONS=388} [2024-06-04 14:49:17,155 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 117 predicate places. [2024-06-04 14:49:17,155 INFO L495 AbstractCegarLoop]: Abstraction has has 162 places, 388 transitions, 5496 flow [2024-06-04 14:49:17,155 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) [2024-06-04 14:49:17,155 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:49:17,155 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:49:17,155 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2024-06-04 14:49:17,156 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 14:49:17,156 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:49:17,156 INFO L85 PathProgramCache]: Analyzing trace with hash -430848965, now seen corresponding path program 4 times [2024-06-04 14:49:17,156 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:49:17,156 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [986940394] [2024-06-04 14:49:17,156 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:49:17,156 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:49:17,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:49:17,970 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:49:17,970 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:49:17,971 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [986940394] [2024-06-04 14:49:17,971 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [986940394] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:49:17,971 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:49:17,971 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 14:49:17,971 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [519607896] [2024-06-04 14:49:17,971 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:49:17,971 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 14:49:17,971 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:49:17,972 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 14:49:17,972 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2024-06-04 14:49:18,079 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-04 14:49:18,080 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 162 places, 388 transitions, 5496 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) [2024-06-04 14:49:18,080 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:49:18,080 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-04 14:49:18,080 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:49:19,395 INFO L124 PetriNetUnfolderBase]: 3687/5633 cut-off events. [2024-06-04 14:49:19,395 INFO L125 PetriNetUnfolderBase]: For 161493/161526 co-relation queries the response was YES. [2024-06-04 14:49:19,420 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40006 conditions, 5633 events. 3687/5633 cut-off events. For 161493/161526 co-relation queries the response was YES. Maximal size of possible extension queue 293. Compared 31174 event pairs, 921 based on Foata normal form. 16/5613 useless extension candidates. Maximal degree in co-relation 39932. Up to 4376 conditions per place. [2024-06-04 14:49:19,444 INFO L140 encePairwiseOnDemand]: 29/44 looper letters, 299 selfloop transitions, 211 changer transitions 0/517 dead transitions. [2024-06-04 14:49:19,444 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 171 places, 517 transitions, 8103 flow [2024-06-04 14:49:19,444 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-04 14:49:19,445 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-04 14:49:19,445 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 207 transitions. [2024-06-04 14:49:19,445 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47045454545454546 [2024-06-04 14:49:19,445 INFO L175 Difference]: Start difference. First operand has 162 places, 388 transitions, 5496 flow. Second operand 10 states and 207 transitions. [2024-06-04 14:49:19,445 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 171 places, 517 transitions, 8103 flow [2024-06-04 14:49:19,695 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 165 places, 517 transitions, 7903 flow, removed 49 selfloop flow, removed 6 redundant places. [2024-06-04 14:49:19,702 INFO L231 Difference]: Finished difference. Result has 170 places, 457 transitions, 7030 flow [2024-06-04 14:49:19,702 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=5310, PETRI_DIFFERENCE_MINUEND_PLACES=156, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=388, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=155, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=196, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=7030, PETRI_PLACES=170, PETRI_TRANSITIONS=457} [2024-06-04 14:49:19,702 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 125 predicate places. [2024-06-04 14:49:19,702 INFO L495 AbstractCegarLoop]: Abstraction has has 170 places, 457 transitions, 7030 flow [2024-06-04 14:49:19,703 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) [2024-06-04 14:49:19,703 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:49:19,703 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:49:19,703 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2024-06-04 14:49:19,703 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 14:49:19,703 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:49:19,703 INFO L85 PathProgramCache]: Analyzing trace with hash 1920715267, now seen corresponding path program 5 times [2024-06-04 14:49:19,703 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:49:19,703 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1090371275] [2024-06-04 14:49:19,703 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:49:19,704 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:49:19,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:49:20,575 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:49:20,575 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:49:20,575 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1090371275] [2024-06-04 14:49:20,575 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1090371275] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:49:20,575 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:49:20,575 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 14:49:20,576 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1231129504] [2024-06-04 14:49:20,576 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:49:20,576 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 14:49:20,576 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:49:20,577 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 14:49:20,577 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2024-06-04 14:49:20,761 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-04 14:49:20,761 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 170 places, 457 transitions, 7030 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) [2024-06-04 14:49:20,761 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:49:20,761 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-04 14:49:20,761 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:49:22,342 INFO L124 PetriNetUnfolderBase]: 3760/5748 cut-off events. [2024-06-04 14:49:22,342 INFO L125 PetriNetUnfolderBase]: For 182683/182715 co-relation queries the response was YES. [2024-06-04 14:49:22,372 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44298 conditions, 5748 events. 3760/5748 cut-off events. For 182683/182715 co-relation queries the response was YES. Maximal size of possible extension queue 311. Compared 32040 event pairs, 921 based on Foata normal form. 20/5745 useless extension candidates. Maximal degree in co-relation 44218. Up to 4222 conditions per place. [2024-06-04 14:49:22,397 INFO L140 encePairwiseOnDemand]: 29/44 looper letters, 261 selfloop transitions, 279 changer transitions 0/547 dead transitions. [2024-06-04 14:49:22,397 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 179 places, 547 transitions, 9426 flow [2024-06-04 14:49:22,398 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-04 14:49:22,398 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-04 14:49:22,398 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 211 transitions. [2024-06-04 14:49:22,398 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47954545454545455 [2024-06-04 14:49:22,398 INFO L175 Difference]: Start difference. First operand has 170 places, 457 transitions, 7030 flow. Second operand 10 states and 211 transitions. [2024-06-04 14:49:22,398 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 179 places, 547 transitions, 9426 flow [2024-06-04 14:49:22,695 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 176 places, 547 transitions, 9222 flow, removed 82 selfloop flow, removed 3 redundant places. [2024-06-04 14:49:22,702 INFO L231 Difference]: Finished difference. Result has 180 places, 493 transitions, 8333 flow [2024-06-04 14:49:22,702 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=6916, PETRI_DIFFERENCE_MINUEND_PLACES=167, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=457, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=246, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=196, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=8333, PETRI_PLACES=180, PETRI_TRANSITIONS=493} [2024-06-04 14:49:22,702 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 135 predicate places. [2024-06-04 14:49:22,702 INFO L495 AbstractCegarLoop]: Abstraction has has 180 places, 493 transitions, 8333 flow [2024-06-04 14:49:22,703 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) [2024-06-04 14:49:22,703 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:49:22,703 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:49:22,703 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2024-06-04 14:49:22,703 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 14:49:22,704 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:49:22,704 INFO L85 PathProgramCache]: Analyzing trace with hash -1024546749, now seen corresponding path program 6 times [2024-06-04 14:49:22,704 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:49:22,704 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [24340746] [2024-06-04 14:49:22,704 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:49:22,704 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:49:22,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:49:23,585 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:49:23,586 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:49:23,586 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [24340746] [2024-06-04 14:49:23,586 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [24340746] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:49:23,586 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:49:23,586 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 14:49:23,586 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [873966768] [2024-06-04 14:49:23,586 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:49:23,586 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 14:49:23,587 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:49:23,587 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 14:49:23,587 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2024-06-04 14:49:23,683 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-04 14:49:23,683 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 180 places, 493 transitions, 8333 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) [2024-06-04 14:49:23,683 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:49:23,683 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-04 14:49:23,684 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:49:25,100 INFO L124 PetriNetUnfolderBase]: 3764/5771 cut-off events. [2024-06-04 14:49:25,100 INFO L125 PetriNetUnfolderBase]: For 196838/196864 co-relation queries the response was YES. [2024-06-04 14:49:25,134 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46477 conditions, 5771 events. 3764/5771 cut-off events. For 196838/196864 co-relation queries the response was YES. Maximal size of possible extension queue 310. Compared 32201 event pairs, 902 based on Foata normal form. 14/5765 useless extension candidates. Maximal degree in co-relation 46392. Up to 4227 conditions per place. [2024-06-04 14:49:25,159 INFO L140 encePairwiseOnDemand]: 29/44 looper letters, 257 selfloop transitions, 281 changer transitions 0/545 dead transitions. [2024-06-04 14:49:25,159 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 189 places, 545 transitions, 10011 flow [2024-06-04 14:49:25,160 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-04 14:49:25,160 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-04 14:49:25,160 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 207 transitions. [2024-06-04 14:49:25,160 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47045454545454546 [2024-06-04 14:49:25,160 INFO L175 Difference]: Start difference. First operand has 180 places, 493 transitions, 8333 flow. Second operand 10 states and 207 transitions. [2024-06-04 14:49:25,160 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 189 places, 545 transitions, 10011 flow [2024-06-04 14:49:25,590 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 186 places, 545 transitions, 9809 flow, removed 81 selfloop flow, removed 3 redundant places. [2024-06-04 14:49:25,597 INFO L231 Difference]: Finished difference. Result has 187 places, 498 transitions, 8828 flow [2024-06-04 14:49:25,597 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=8139, PETRI_DIFFERENCE_MINUEND_PLACES=177, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=493, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=276, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=217, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=8828, PETRI_PLACES=187, PETRI_TRANSITIONS=498} [2024-06-04 14:49:25,598 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 142 predicate places. [2024-06-04 14:49:25,598 INFO L495 AbstractCegarLoop]: Abstraction has has 187 places, 498 transitions, 8828 flow [2024-06-04 14:49:25,598 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) [2024-06-04 14:49:25,599 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:49:25,599 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:49:25,599 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2024-06-04 14:49:25,599 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 14:49:25,599 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:49:25,599 INFO L85 PathProgramCache]: Analyzing trace with hash 1159184975, now seen corresponding path program 7 times [2024-06-04 14:49:25,600 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:49:25,600 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [652916735] [2024-06-04 14:49:25,600 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:49:25,600 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:49:25,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:49:26,580 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:49:26,581 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:49:26,581 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [652916735] [2024-06-04 14:49:26,581 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [652916735] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:49:26,581 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:49:26,581 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 14:49:26,581 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [330846960] [2024-06-04 14:49:26,581 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:49:26,581 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 14:49:26,582 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:49:26,582 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 14:49:26,582 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-04 14:49:26,710 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-04 14:49:26,711 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 187 places, 498 transitions, 8828 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) [2024-06-04 14:49:26,711 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:49:26,711 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-04 14:49:26,711 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:49:28,127 INFO L124 PetriNetUnfolderBase]: 3881/5954 cut-off events. [2024-06-04 14:49:28,127 INFO L125 PetriNetUnfolderBase]: For 201729/201763 co-relation queries the response was YES. [2024-06-04 14:49:28,164 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48339 conditions, 5954 events. 3881/5954 cut-off events. For 201729/201763 co-relation queries the response was YES. Maximal size of possible extension queue 324. Compared 33347 event pairs, 832 based on Foata normal form. 18/5964 useless extension candidates. Maximal degree in co-relation 48252. Up to 5356 conditions per place. [2024-06-04 14:49:28,191 INFO L140 encePairwiseOnDemand]: 30/44 looper letters, 451 selfloop transitions, 114 changer transitions 0/572 dead transitions. [2024-06-04 14:49:28,191 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 196 places, 572 transitions, 10815 flow [2024-06-04 14:49:28,192 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-04 14:49:28,192 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-04 14:49:28,192 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 197 transitions. [2024-06-04 14:49:28,193 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44772727272727275 [2024-06-04 14:49:28,193 INFO L175 Difference]: Start difference. First operand has 187 places, 498 transitions, 8828 flow. Second operand 10 states and 197 transitions. [2024-06-04 14:49:28,193 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 196 places, 572 transitions, 10815 flow [2024-06-04 14:49:28,581 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 189 places, 572 transitions, 10195 flow, removed 63 selfloop flow, removed 7 redundant places. [2024-06-04 14:49:28,589 INFO L231 Difference]: Finished difference. Result has 192 places, 535 transitions, 9213 flow [2024-06-04 14:49:28,590 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=8258, PETRI_DIFFERENCE_MINUEND_PLACES=180, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=498, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=77, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=396, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=9213, PETRI_PLACES=192, PETRI_TRANSITIONS=535} [2024-06-04 14:49:28,590 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 147 predicate places. [2024-06-04 14:49:28,590 INFO L495 AbstractCegarLoop]: Abstraction has has 192 places, 535 transitions, 9213 flow [2024-06-04 14:49:28,591 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) [2024-06-04 14:49:28,591 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:49:28,591 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:49:28,591 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2024-06-04 14:49:28,591 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 14:49:28,591 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:49:28,591 INFO L85 PathProgramCache]: Analyzing trace with hash 1318211113, now seen corresponding path program 8 times [2024-06-04 14:49:28,591 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:49:28,591 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [415953063] [2024-06-04 14:49:28,591 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:49:28,592 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:49:28,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:49:29,569 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:49:29,569 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:49:29,569 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [415953063] [2024-06-04 14:49:29,569 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [415953063] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:49:29,569 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:49:29,570 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 14:49:29,570 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [484824592] [2024-06-04 14:49:29,570 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:49:29,570 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 14:49:29,570 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:49:29,570 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 14:49:29,571 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2024-06-04 14:49:29,730 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-04 14:49:29,731 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 192 places, 535 transitions, 9213 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) [2024-06-04 14:49:29,731 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:49:29,731 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-04 14:49:29,731 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:49:31,244 INFO L124 PetriNetUnfolderBase]: 4043/6173 cut-off events. [2024-06-04 14:49:31,245 INFO L125 PetriNetUnfolderBase]: For 220007/220019 co-relation queries the response was YES. [2024-06-04 14:49:31,284 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50473 conditions, 6173 events. 4043/6173 cut-off events. For 220007/220019 co-relation queries the response was YES. Maximal size of possible extension queue 345. Compared 34772 event pairs, 897 based on Foata normal form. 14/6173 useless extension candidates. Maximal degree in co-relation 50383. Up to 4269 conditions per place. [2024-06-04 14:49:31,312 INFO L140 encePairwiseOnDemand]: 29/44 looper letters, 235 selfloop transitions, 388 changer transitions 0/630 dead transitions. [2024-06-04 14:49:31,312 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 201 places, 630 transitions, 11831 flow [2024-06-04 14:49:31,313 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-04 14:49:31,313 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-04 14:49:31,313 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 212 transitions. [2024-06-04 14:49:31,313 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4818181818181818 [2024-06-04 14:49:31,314 INFO L175 Difference]: Start difference. First operand has 192 places, 535 transitions, 9213 flow. Second operand 10 states and 212 transitions. [2024-06-04 14:49:31,314 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 201 places, 630 transitions, 11831 flow [2024-06-04 14:49:31,743 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 198 places, 630 transitions, 11639 flow, removed 47 selfloop flow, removed 3 redundant places. [2024-06-04 14:49:31,752 INFO L231 Difference]: Finished difference. Result has 201 places, 577 transitions, 10661 flow [2024-06-04 14:49:31,752 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=9021, PETRI_DIFFERENCE_MINUEND_PLACES=189, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=535, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=349, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=178, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=10661, PETRI_PLACES=201, PETRI_TRANSITIONS=577} [2024-06-04 14:49:31,752 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 156 predicate places. [2024-06-04 14:49:31,753 INFO L495 AbstractCegarLoop]: Abstraction has has 201 places, 577 transitions, 10661 flow [2024-06-04 14:49:31,753 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) [2024-06-04 14:49:31,753 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:49:31,753 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:49:31,753 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2024-06-04 14:49:31,753 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 14:49:31,753 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:49:31,753 INFO L85 PathProgramCache]: Analyzing trace with hash 1318384093, now seen corresponding path program 9 times [2024-06-04 14:49:31,754 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:49:31,754 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1284161294] [2024-06-04 14:49:31,754 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:49:31,754 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:49:31,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:49:32,743 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:49:32,743 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:49:32,743 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1284161294] [2024-06-04 14:49:32,743 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1284161294] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:49:32,743 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:49:32,743 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 14:49:32,743 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1751452917] [2024-06-04 14:49:32,743 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:49:32,744 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 14:49:32,744 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:49:32,744 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 14:49:32,744 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2024-06-04 14:49:32,888 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-04 14:49:32,888 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 201 places, 577 transitions, 10661 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) [2024-06-04 14:49:32,888 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:49:32,888 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-04 14:49:32,888 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:49:34,577 INFO L124 PetriNetUnfolderBase]: 4093/6247 cut-off events. [2024-06-04 14:49:34,577 INFO L125 PetriNetUnfolderBase]: For 243886/243898 co-relation queries the response was YES. [2024-06-04 14:49:34,609 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53270 conditions, 6247 events. 4093/6247 cut-off events. For 243886/243898 co-relation queries the response was YES. Maximal size of possible extension queue 352. Compared 35289 event pairs, 919 based on Foata normal form. 16/6249 useless extension candidates. Maximal degree in co-relation 53177. Up to 4314 conditions per place. [2024-06-04 14:49:34,637 INFO L140 encePairwiseOnDemand]: 29/44 looper letters, 253 selfloop transitions, 391 changer transitions 0/651 dead transitions. [2024-06-04 14:49:34,638 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 210 places, 651 transitions, 13086 flow [2024-06-04 14:49:34,638 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-04 14:49:34,638 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-04 14:49:34,639 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 212 transitions. [2024-06-04 14:49:34,639 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4818181818181818 [2024-06-04 14:49:34,639 INFO L175 Difference]: Start difference. First operand has 201 places, 577 transitions, 10661 flow. Second operand 10 states and 212 transitions. [2024-06-04 14:49:34,639 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 210 places, 651 transitions, 13086 flow [2024-06-04 14:49:35,107 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 207 places, 651 transitions, 12814 flow, removed 78 selfloop flow, removed 3 redundant places. [2024-06-04 14:49:35,116 INFO L231 Difference]: Finished difference. Result has 208 places, 590 transitions, 11531 flow [2024-06-04 14:49:35,117 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=10397, PETRI_DIFFERENCE_MINUEND_PLACES=198, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=577, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=378, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=199, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=11531, PETRI_PLACES=208, PETRI_TRANSITIONS=590} [2024-06-04 14:49:35,117 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 163 predicate places. [2024-06-04 14:49:35,117 INFO L495 AbstractCegarLoop]: Abstraction has has 208 places, 590 transitions, 11531 flow [2024-06-04 14:49:35,117 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) [2024-06-04 14:49:35,117 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:49:35,118 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:49:35,118 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2024-06-04 14:49:35,118 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 14:49:35,118 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:49:35,118 INFO L85 PathProgramCache]: Analyzing trace with hash 238174173, now seen corresponding path program 10 times [2024-06-04 14:49:35,118 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:49:35,118 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [649018916] [2024-06-04 14:49:35,118 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:49:35,118 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:49:35,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:49:36,209 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:49:36,210 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:49:36,210 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [649018916] [2024-06-04 14:49:36,210 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [649018916] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:49:36,210 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:49:36,210 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 14:49:36,210 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1989295521] [2024-06-04 14:49:36,210 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:49:36,210 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 14:49:36,210 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:49:36,211 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 14:49:36,211 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2024-06-04 14:49:36,332 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-04 14:49:36,333 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 208 places, 590 transitions, 11531 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) [2024-06-04 14:49:36,333 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:49:36,333 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-04 14:49:36,333 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:49:37,984 INFO L124 PetriNetUnfolderBase]: 4091/6259 cut-off events. [2024-06-04 14:49:37,985 INFO L125 PetriNetUnfolderBase]: For 256060/256090 co-relation queries the response was YES. [2024-06-04 14:49:38,021 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53953 conditions, 6259 events. 4091/6259 cut-off events. For 256060/256090 co-relation queries the response was YES. Maximal size of possible extension queue 350. Compared 35330 event pairs, 832 based on Foata normal form. 38/6287 useless extension candidates. Maximal degree in co-relation 53859. Up to 4314 conditions per place. [2024-06-04 14:49:38,050 INFO L140 encePairwiseOnDemand]: 29/44 looper letters, 242 selfloop transitions, 400 changer transitions 0/649 dead transitions. [2024-06-04 14:49:38,050 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 217 places, 649 transitions, 13562 flow [2024-06-04 14:49:38,050 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-04 14:49:38,050 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-04 14:49:38,051 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 207 transitions. [2024-06-04 14:49:38,051 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47045454545454546 [2024-06-04 14:49:38,051 INFO L175 Difference]: Start difference. First operand has 208 places, 590 transitions, 11531 flow. Second operand 10 states and 207 transitions. [2024-06-04 14:49:38,051 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 217 places, 649 transitions, 13562 flow [2024-06-04 14:49:38,594 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 211 places, 649 transitions, 12717 flow, removed 103 selfloop flow, removed 6 redundant places. [2024-06-04 14:49:38,604 INFO L231 Difference]: Finished difference. Result has 212 places, 595 transitions, 11636 flow [2024-06-04 14:49:38,604 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=10691, PETRI_DIFFERENCE_MINUEND_PLACES=202, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=590, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=395, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=195, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=11636, PETRI_PLACES=212, PETRI_TRANSITIONS=595} [2024-06-04 14:49:38,605 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 167 predicate places. [2024-06-04 14:49:38,605 INFO L495 AbstractCegarLoop]: Abstraction has has 212 places, 595 transitions, 11636 flow [2024-06-04 14:49:38,605 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) [2024-06-04 14:49:38,605 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:49:38,606 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:49:38,606 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2024-06-04 14:49:38,606 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 14:49:38,606 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:49:38,606 INFO L85 PathProgramCache]: Analyzing trace with hash 1336682729, now seen corresponding path program 1 times [2024-06-04 14:49:38,606 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:49:38,607 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [726132068] [2024-06-04 14:49:38,607 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:49:38,607 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:49:38,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:49:39,789 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:49:39,789 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:49:39,789 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [726132068] [2024-06-04 14:49:39,789 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [726132068] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:49:39,789 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:49:39,789 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 14:49:39,789 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [895337497] [2024-06-04 14:49:39,789 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:49:39,790 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 14:49:39,790 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:49:39,790 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 14:49:39,790 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2024-06-04 14:49:39,912 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-04 14:49:39,912 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 212 places, 595 transitions, 11636 flow. Second operand has 9 states, 9 states have (on average 11.555555555555555) internal successors, (104), 9 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) [2024-06-04 14:49:39,912 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:49:39,912 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-04 14:49:39,913 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:49:41,448 INFO L124 PetriNetUnfolderBase]: 4681/7052 cut-off events. [2024-06-04 14:49:41,448 INFO L125 PetriNetUnfolderBase]: For 316838/316972 co-relation queries the response was YES. [2024-06-04 14:49:41,496 INFO L83 FinitePrefix]: Finished finitePrefix Result has 61038 conditions, 7052 events. 4681/7052 cut-off events. For 316838/316972 co-relation queries the response was YES. Maximal size of possible extension queue 372. Compared 39287 event pairs, 1549 based on Foata normal form. 75/7023 useless extension candidates. Maximal degree in co-relation 60943. Up to 6431 conditions per place. [2024-06-04 14:49:41,530 INFO L140 encePairwiseOnDemand]: 31/44 looper letters, 521 selfloop transitions, 79 changer transitions 0/644 dead transitions. [2024-06-04 14:49:41,531 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 220 places, 644 transitions, 13319 flow [2024-06-04 14:49:41,531 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 14:49:41,531 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 14:49:41,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 179 transitions. [2024-06-04 14:49:41,532 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45202020202020204 [2024-06-04 14:49:41,532 INFO L175 Difference]: Start difference. First operand has 212 places, 595 transitions, 11636 flow. Second operand 9 states and 179 transitions. [2024-06-04 14:49:41,532 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 220 places, 644 transitions, 13319 flow [2024-06-04 14:49:42,243 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 213 places, 644 transitions, 12461 flow, removed 103 selfloop flow, removed 7 redundant places. [2024-06-04 14:49:42,254 INFO L231 Difference]: Finished difference. Result has 216 places, 612 transitions, 11305 flow [2024-06-04 14:49:42,255 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=10786, PETRI_DIFFERENCE_MINUEND_PLACES=205, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=595, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=62, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=529, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=11305, PETRI_PLACES=216, PETRI_TRANSITIONS=612} [2024-06-04 14:49:42,255 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 171 predicate places. [2024-06-04 14:49:42,255 INFO L495 AbstractCegarLoop]: Abstraction has has 216 places, 612 transitions, 11305 flow [2024-06-04 14:49:42,255 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.555555555555555) internal successors, (104), 9 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) [2024-06-04 14:49:42,256 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:49:42,256 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:49:42,256 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2024-06-04 14:49:42,256 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 14:49:42,256 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:49:42,257 INFO L85 PathProgramCache]: Analyzing trace with hash 376789913, now seen corresponding path program 1 times [2024-06-04 14:49:42,257 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:49:42,257 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1313966148] [2024-06-04 14:49:42,257 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:49:42,257 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:49:42,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:49:43,025 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:49:43,025 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:49:43,025 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1313966148] [2024-06-04 14:49:43,025 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1313966148] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:49:43,025 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:49:43,026 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-04 14:49:43,026 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1295852737] [2024-06-04 14:49:43,026 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:49:43,026 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-04 14:49:43,026 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:49:43,026 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-04 14:49:43,026 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-04 14:49:43,110 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-04 14:49:43,110 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 216 places, 612 transitions, 11305 flow. Second operand has 7 states, 7 states have (on average 12.0) internal successors, (84), 7 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:49:43,110 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:49:43,110 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-04 14:49:43,110 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:49:44,490 INFO L124 PetriNetUnfolderBase]: 4405/6670 cut-off events. [2024-06-04 14:49:44,490 INFO L125 PetriNetUnfolderBase]: For 313690/313997 co-relation queries the response was YES. [2024-06-04 14:49:44,538 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57053 conditions, 6670 events. 4405/6670 cut-off events. For 313690/313997 co-relation queries the response was YES. Maximal size of possible extension queue 344. Compared 36697 event pairs, 1462 based on Foata normal form. 118/6655 useless extension candidates. Maximal degree in co-relation 56955. Up to 6098 conditions per place. [2024-06-04 14:49:44,719 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 516 selfloop transitions, 25 changer transitions 0/636 dead transitions. [2024-06-04 14:49:44,719 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 222 places, 636 transitions, 12599 flow [2024-06-04 14:49:44,720 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 14:49:44,720 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 14:49:44,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 135 transitions. [2024-06-04 14:49:44,721 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4383116883116883 [2024-06-04 14:49:44,721 INFO L175 Difference]: Start difference. First operand has 216 places, 612 transitions, 11305 flow. Second operand 7 states and 135 transitions. [2024-06-04 14:49:44,721 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 222 places, 636 transitions, 12599 flow [2024-06-04 14:49:45,297 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 217 places, 636 transitions, 12199 flow, removed 45 selfloop flow, removed 5 redundant places. [2024-06-04 14:49:45,306 INFO L231 Difference]: Finished difference. Result has 218 places, 618 transitions, 11032 flow [2024-06-04 14:49:45,306 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=10905, PETRI_DIFFERENCE_MINUEND_PLACES=211, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=612, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=590, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=11032, PETRI_PLACES=218, PETRI_TRANSITIONS=618} [2024-06-04 14:49:45,306 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 173 predicate places. [2024-06-04 14:49:45,306 INFO L495 AbstractCegarLoop]: Abstraction has has 218 places, 618 transitions, 11032 flow [2024-06-04 14:49:45,307 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 12.0) internal successors, (84), 7 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:49:45,307 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:49:45,307 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:49:45,307 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2024-06-04 14:49:45,307 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 14:49:45,307 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:49:45,307 INFO L85 PathProgramCache]: Analyzing trace with hash -1406682433, now seen corresponding path program 11 times [2024-06-04 14:49:45,307 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:49:45,308 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [105709179] [2024-06-04 14:49:45,308 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:49:45,308 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:49:45,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:49:46,550 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:49:46,550 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:49:46,550 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [105709179] [2024-06-04 14:49:46,551 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [105709179] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:49:46,551 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:49:46,551 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 14:49:46,551 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1496957080] [2024-06-04 14:49:46,551 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:49:46,551 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 14:49:46,551 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:49:46,551 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 14:49:46,552 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-04 14:49:46,709 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-04 14:49:46,709 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 218 places, 618 transitions, 11032 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) [2024-06-04 14:49:46,709 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:49:46,709 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-04 14:49:46,710 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:49:48,215 INFO L124 PetriNetUnfolderBase]: 4269/6511 cut-off events. [2024-06-04 14:49:48,215 INFO L125 PetriNetUnfolderBase]: For 314971/315094 co-relation queries the response was YES. [2024-06-04 14:49:48,258 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56077 conditions, 6511 events. 4269/6511 cut-off events. For 314971/315094 co-relation queries the response was YES. Maximal size of possible extension queue 370. Compared 37176 event pairs, 1120 based on Foata normal form. 24/6489 useless extension candidates. Maximal degree in co-relation 55979. Up to 5791 conditions per place. [2024-06-04 14:49:48,288 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 491 selfloop transitions, 155 changer transitions 0/656 dead transitions. [2024-06-04 14:49:48,288 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 226 places, 656 transitions, 12592 flow [2024-06-04 14:49:48,289 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 14:49:48,289 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 14:49:48,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 179 transitions. [2024-06-04 14:49:48,290 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45202020202020204 [2024-06-04 14:49:48,290 INFO L175 Difference]: Start difference. First operand has 218 places, 618 transitions, 11032 flow. Second operand 9 states and 179 transitions. [2024-06-04 14:49:48,290 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 226 places, 656 transitions, 12592 flow [2024-06-04 14:49:48,998 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 224 places, 656 transitions, 12513 flow, removed 35 selfloop flow, removed 2 redundant places. [2024-06-04 14:49:49,007 INFO L231 Difference]: Finished difference. Result has 225 places, 621 transitions, 11411 flow [2024-06-04 14:49:49,008 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=10953, PETRI_DIFFERENCE_MINUEND_PLACES=216, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=618, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=152, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=463, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=11411, PETRI_PLACES=225, PETRI_TRANSITIONS=621} [2024-06-04 14:49:49,008 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 180 predicate places. [2024-06-04 14:49:49,009 INFO L495 AbstractCegarLoop]: Abstraction has has 225 places, 621 transitions, 11411 flow [2024-06-04 14:49:49,009 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) [2024-06-04 14:49:49,009 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:49:49,009 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:49:49,009 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2024-06-04 14:49:49,009 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 14:49:49,009 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:49:49,009 INFO L85 PathProgramCache]: Analyzing trace with hash 764098835, now seen corresponding path program 12 times [2024-06-04 14:49:49,009 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:49:49,010 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [33930063] [2024-06-04 14:49:49,010 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:49:49,010 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:49:49,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:49:50,350 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:49:50,350 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:49:50,350 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [33930063] [2024-06-04 14:49:50,350 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [33930063] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:49:50,350 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:49:50,351 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 14:49:50,351 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [365020675] [2024-06-04 14:49:50,351 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:49:50,351 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 14:49:50,351 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:49:50,352 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 14:49:50,352 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-04 14:49:50,476 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-04 14:49:50,477 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 225 places, 621 transitions, 11411 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) [2024-06-04 14:49:50,477 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:49:50,477 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-04 14:49:50,477 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:49:51,990 INFO L124 PetriNetUnfolderBase]: 4321/6586 cut-off events. [2024-06-04 14:49:51,990 INFO L125 PetriNetUnfolderBase]: For 336355/336505 co-relation queries the response was YES. [2024-06-04 14:49:52,036 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58366 conditions, 6586 events. 4321/6586 cut-off events. For 336355/336505 co-relation queries the response was YES. Maximal size of possible extension queue 372. Compared 37659 event pairs, 957 based on Foata normal form. 42/6583 useless extension candidates. Maximal degree in co-relation 58266. Up to 4379 conditions per place. [2024-06-04 14:49:52,068 INFO L140 encePairwiseOnDemand]: 31/44 looper letters, 189 selfloop transitions, 482 changer transitions 0/681 dead transitions. [2024-06-04 14:49:52,068 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 233 places, 681 transitions, 13626 flow [2024-06-04 14:49:52,069 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 14:49:52,069 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 14:49:52,069 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 188 transitions. [2024-06-04 14:49:52,070 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47474747474747475 [2024-06-04 14:49:52,070 INFO L175 Difference]: Start difference. First operand has 225 places, 621 transitions, 11411 flow. Second operand 9 states and 188 transitions. [2024-06-04 14:49:52,070 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 233 places, 681 transitions, 13626 flow [2024-06-04 14:49:52,730 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 225 places, 681 transitions, 13324 flow, removed 23 selfloop flow, removed 8 redundant places. [2024-06-04 14:49:52,740 INFO L231 Difference]: Finished difference. Result has 226 places, 632 transitions, 12428 flow [2024-06-04 14:49:52,740 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=11113, PETRI_DIFFERENCE_MINUEND_PLACES=217, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=621, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=474, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=147, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=12428, PETRI_PLACES=226, PETRI_TRANSITIONS=632} [2024-06-04 14:49:52,741 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 181 predicate places. [2024-06-04 14:49:52,741 INFO L495 AbstractCegarLoop]: Abstraction has has 226 places, 632 transitions, 12428 flow [2024-06-04 14:49:52,741 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) [2024-06-04 14:49:52,741 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:49:52,741 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:49:52,741 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2024-06-04 14:49:52,741 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 14:49:52,742 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:49:52,742 INFO L85 PathProgramCache]: Analyzing trace with hash 768740465, now seen corresponding path program 13 times [2024-06-04 14:49:52,742 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:49:52,742 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1549860528] [2024-06-04 14:49:52,742 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:49:52,742 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:49:52,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:49:53,990 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:49:53,990 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:49:53,990 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1549860528] [2024-06-04 14:49:53,990 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1549860528] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:49:53,990 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:49:53,990 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 14:49:53,990 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1737384842] [2024-06-04 14:49:53,990 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:49:53,991 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 14:49:53,991 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:49:53,991 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 14:49:53,991 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-04 14:49:54,147 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-04 14:49:54,147 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 226 places, 632 transitions, 12428 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) [2024-06-04 14:49:54,147 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:49:54,147 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-04 14:49:54,147 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:49:55,484 INFO L124 PetriNetUnfolderBase]: 4304/6588 cut-off events. [2024-06-04 14:49:55,484 INFO L125 PetriNetUnfolderBase]: For 333503/333553 co-relation queries the response was YES. [2024-06-04 14:49:55,530 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59642 conditions, 6588 events. 4304/6588 cut-off events. For 333503/333553 co-relation queries the response was YES. Maximal size of possible extension queue 378. Compared 37675 event pairs, 959 based on Foata normal form. 10/6575 useless extension candidates. Maximal degree in co-relation 59542. Up to 4333 conditions per place. [2024-06-04 14:49:55,562 INFO L140 encePairwiseOnDemand]: 31/44 looper letters, 222 selfloop transitions, 475 changer transitions 0/707 dead transitions. [2024-06-04 14:49:55,562 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 234 places, 707 transitions, 15038 flow [2024-06-04 14:49:55,563 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 14:49:55,563 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 14:49:55,563 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 186 transitions. [2024-06-04 14:49:55,563 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4696969696969697 [2024-06-04 14:49:55,563 INFO L175 Difference]: Start difference. First operand has 226 places, 632 transitions, 12428 flow. Second operand 9 states and 186 transitions. [2024-06-04 14:49:55,563 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 234 places, 707 transitions, 15038 flow [2024-06-04 14:49:56,383 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 226 places, 707 transitions, 14472 flow, removed 94 selfloop flow, removed 8 redundant places. [2024-06-04 14:49:56,397 INFO L231 Difference]: Finished difference. Result has 227 places, 645 transitions, 13250 flow [2024-06-04 14:49:56,398 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=11882, PETRI_DIFFERENCE_MINUEND_PLACES=218, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=632, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=462, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=170, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=13250, PETRI_PLACES=227, PETRI_TRANSITIONS=645} [2024-06-04 14:49:56,399 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 182 predicate places. [2024-06-04 14:49:56,399 INFO L495 AbstractCegarLoop]: Abstraction has has 227 places, 645 transitions, 13250 flow [2024-06-04 14:49:56,399 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) [2024-06-04 14:49:56,399 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:49:56,400 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:49:56,400 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2024-06-04 14:49:56,400 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 14:49:56,400 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:49:56,400 INFO L85 PathProgramCache]: Analyzing trace with hash -1229184679, now seen corresponding path program 2 times [2024-06-04 14:49:56,400 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:49:56,401 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1714027965] [2024-06-04 14:49:56,401 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:49:56,401 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:49:56,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:49:57,706 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:49:57,706 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:49:57,706 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1714027965] [2024-06-04 14:49:57,706 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1714027965] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:49:57,706 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:49:57,706 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 14:49:57,707 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1330562916] [2024-06-04 14:49:57,707 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:49:57,707 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 14:49:57,707 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:49:57,707 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 14:49:57,707 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-04 14:49:57,818 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-04 14:49:57,818 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 227 places, 645 transitions, 13250 flow. Second operand has 9 states, 9 states have (on average 11.555555555555555) internal successors, (104), 9 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) [2024-06-04 14:49:57,818 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:49:57,818 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-04 14:49:57,818 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:49:59,297 INFO L124 PetriNetUnfolderBase]: 4853/7310 cut-off events. [2024-06-04 14:49:59,297 INFO L125 PetriNetUnfolderBase]: For 354295/354435 co-relation queries the response was YES. [2024-06-04 14:49:59,348 INFO L83 FinitePrefix]: Finished finitePrefix Result has 66496 conditions, 7310 events. 4853/7310 cut-off events. For 354295/354435 co-relation queries the response was YES. Maximal size of possible extension queue 391. Compared 41038 event pairs, 1512 based on Foata normal form. 76/7279 useless extension candidates. Maximal degree in co-relation 66397. Up to 6652 conditions per place. [2024-06-04 14:49:59,385 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 554 selfloop transitions, 83 changer transitions 0/683 dead transitions. [2024-06-04 14:49:59,385 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 234 places, 683 transitions, 14903 flow [2024-06-04 14:49:59,386 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 14:49:59,386 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 14:49:59,386 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 158 transitions. [2024-06-04 14:49:59,386 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44886363636363635 [2024-06-04 14:49:59,386 INFO L175 Difference]: Start difference. First operand has 227 places, 645 transitions, 13250 flow. Second operand 8 states and 158 transitions. [2024-06-04 14:49:59,386 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 234 places, 683 transitions, 14903 flow [2024-06-04 14:50:00,311 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 226 places, 683 transitions, 13916 flow, removed 111 selfloop flow, removed 8 redundant places. [2024-06-04 14:50:00,325 INFO L231 Difference]: Finished difference. Result has 228 places, 652 transitions, 12627 flow [2024-06-04 14:50:00,326 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=12269, PETRI_DIFFERENCE_MINUEND_PLACES=219, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=645, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=76, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=566, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=12627, PETRI_PLACES=228, PETRI_TRANSITIONS=652} [2024-06-04 14:50:00,327 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 183 predicate places. [2024-06-04 14:50:00,327 INFO L495 AbstractCegarLoop]: Abstraction has has 228 places, 652 transitions, 12627 flow [2024-06-04 14:50:00,327 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.555555555555555) internal successors, (104), 9 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) [2024-06-04 14:50:00,328 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:50:00,328 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:50:00,328 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2024-06-04 14:50:00,328 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 14:50:00,329 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:50:00,329 INFO L85 PathProgramCache]: Analyzing trace with hash -1229430943, now seen corresponding path program 14 times [2024-06-04 14:50:00,329 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:50:00,329 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1668238413] [2024-06-04 14:50:00,329 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:50:00,330 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:50:00,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:50:01,576 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:50:01,576 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:50:01,576 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1668238413] [2024-06-04 14:50:01,577 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1668238413] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:50:01,577 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:50:01,577 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 14:50:01,577 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [996505384] [2024-06-04 14:50:01,577 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:50:01,577 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 14:50:01,577 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:50:01,577 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 14:50:01,578 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-04 14:50:01,685 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-04 14:50:01,686 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 228 places, 652 transitions, 12627 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) [2024-06-04 14:50:01,686 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:50:01,686 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-04 14:50:01,686 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:50:03,224 INFO L124 PetriNetUnfolderBase]: 4450/6812 cut-off events. [2024-06-04 14:50:03,224 INFO L125 PetriNetUnfolderBase]: For 294913/294937 co-relation queries the response was YES. [2024-06-04 14:50:03,264 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60278 conditions, 6812 events. 4450/6812 cut-off events. For 294913/294937 co-relation queries the response was YES. Maximal size of possible extension queue 387. Compared 38990 event pairs, 845 based on Foata normal form. 15/6813 useless extension candidates. Maximal degree in co-relation 60179. Up to 4446 conditions per place. [2024-06-04 14:50:03,294 INFO L140 encePairwiseOnDemand]: 31/44 looper letters, 242 selfloop transitions, 481 changer transitions 0/734 dead transitions. [2024-06-04 14:50:03,294 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 236 places, 734 transitions, 15445 flow [2024-06-04 14:50:03,295 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 14:50:03,295 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 14:50:03,295 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 184 transitions. [2024-06-04 14:50:03,295 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46464646464646464 [2024-06-04 14:50:03,295 INFO L175 Difference]: Start difference. First operand has 228 places, 652 transitions, 12627 flow. Second operand 9 states and 184 transitions. [2024-06-04 14:50:03,295 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 236 places, 734 transitions, 15445 flow [2024-06-04 14:50:03,934 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 231 places, 734 transitions, 15246 flow, removed 23 selfloop flow, removed 5 redundant places. [2024-06-04 14:50:03,946 INFO L231 Difference]: Finished difference. Result has 232 places, 670 transitions, 13955 flow [2024-06-04 14:50:03,947 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=12428, PETRI_DIFFERENCE_MINUEND_PLACES=223, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=652, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=463, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=189, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=13955, PETRI_PLACES=232, PETRI_TRANSITIONS=670} [2024-06-04 14:50:03,947 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 187 predicate places. [2024-06-04 14:50:03,947 INFO L495 AbstractCegarLoop]: Abstraction has has 232 places, 670 transitions, 13955 flow [2024-06-04 14:50:03,948 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) [2024-06-04 14:50:03,948 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:50:03,948 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:50:03,948 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2024-06-04 14:50:03,948 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 14:50:03,949 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:50:03,949 INFO L85 PathProgramCache]: Analyzing trace with hash 1025662271, now seen corresponding path program 2 times [2024-06-04 14:50:03,949 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:50:03,949 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1533674271] [2024-06-04 14:50:03,949 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:50:03,949 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:50:03,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:50:04,943 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:50:04,943 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:50:04,943 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1533674271] [2024-06-04 14:50:04,944 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1533674271] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:50:04,944 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:50:04,944 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-04 14:50:04,944 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1211741772] [2024-06-04 14:50:04,944 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:50:04,944 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-04 14:50:04,944 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:50:04,944 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-04 14:50:04,944 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-04 14:50:05,011 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-04 14:50:05,012 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 232 places, 670 transitions, 13955 flow. Second operand has 7 states, 7 states have (on average 12.0) internal successors, (84), 7 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:50:05,012 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:50:05,012 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-04 14:50:05,012 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:50:06,512 INFO L124 PetriNetUnfolderBase]: 4581/6948 cut-off events. [2024-06-04 14:50:06,513 INFO L125 PetriNetUnfolderBase]: For 344252/344590 co-relation queries the response was YES. [2024-06-04 14:50:06,555 INFO L83 FinitePrefix]: Finished finitePrefix Result has 63561 conditions, 6948 events. 4581/6948 cut-off events. For 344252/344590 co-relation queries the response was YES. Maximal size of possible extension queue 365. Compared 38649 event pairs, 1451 based on Foata normal form. 118/6911 useless extension candidates. Maximal degree in co-relation 63461. Up to 6369 conditions per place. [2024-06-04 14:50:06,587 INFO L140 encePairwiseOnDemand]: 36/44 looper letters, 565 selfloop transitions, 27 changer transitions 0/687 dead transitions. [2024-06-04 14:50:06,587 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 237 places, 687 transitions, 15313 flow [2024-06-04 14:50:06,588 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-04 14:50:06,588 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-04 14:50:06,588 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 117 transitions. [2024-06-04 14:50:06,588 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4431818181818182 [2024-06-04 14:50:06,588 INFO L175 Difference]: Start difference. First operand has 232 places, 670 transitions, 13955 flow. Second operand 6 states and 117 transitions. [2024-06-04 14:50:06,588 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 237 places, 687 transitions, 15313 flow [2024-06-04 14:50:07,247 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 230 places, 687 transitions, 14203 flow, removed 150 selfloop flow, removed 7 redundant places. [2024-06-04 14:50:07,261 INFO L231 Difference]: Finished difference. Result has 231 places, 673 transitions, 12950 flow [2024-06-04 14:50:07,262 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=12847, PETRI_DIFFERENCE_MINUEND_PLACES=225, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=670, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=646, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=12950, PETRI_PLACES=231, PETRI_TRANSITIONS=673} [2024-06-04 14:50:07,262 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 186 predicate places. [2024-06-04 14:50:07,263 INFO L495 AbstractCegarLoop]: Abstraction has has 231 places, 673 transitions, 12950 flow [2024-06-04 14:50:07,263 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 12.0) internal successors, (84), 7 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:50:07,263 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:50:07,263 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:50:07,263 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2024-06-04 14:50:07,263 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 14:50:07,264 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:50:07,264 INFO L85 PathProgramCache]: Analyzing trace with hash 568306281, now seen corresponding path program 3 times [2024-06-04 14:50:07,264 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:50:07,264 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1325984579] [2024-06-04 14:50:07,264 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:50:07,264 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:50:07,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:50:08,327 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:50:08,327 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:50:08,327 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1325984579] [2024-06-04 14:50:08,327 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1325984579] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:50:08,327 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:50:08,328 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 14:50:08,328 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [783028517] [2024-06-04 14:50:08,328 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:50:08,328 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 14:50:08,328 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:50:08,328 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 14:50:08,328 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-06-04 14:50:08,453 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-04 14:50:08,454 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 231 places, 673 transitions, 12950 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) [2024-06-04 14:50:08,454 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:50:08,454 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-04 14:50:08,454 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:50:10,096 INFO L124 PetriNetUnfolderBase]: 5018/7521 cut-off events. [2024-06-04 14:50:10,096 INFO L125 PetriNetUnfolderBase]: For 348785/348933 co-relation queries the response was YES. [2024-06-04 14:50:10,149 INFO L83 FinitePrefix]: Finished finitePrefix Result has 65751 conditions, 7521 events. 5018/7521 cut-off events. For 348785/348933 co-relation queries the response was YES. Maximal size of possible extension queue 403. Compared 42118 event pairs, 1727 based on Foata normal form. 74/7475 useless extension candidates. Maximal degree in co-relation 65651. Up to 7058 conditions per place. [2024-06-04 14:50:10,185 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 634 selfloop transitions, 18 changer transitions 0/699 dead transitions. [2024-06-04 14:50:10,185 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 238 places, 699 transitions, 14448 flow [2024-06-04 14:50:10,186 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 14:50:10,186 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 14:50:10,186 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 150 transitions. [2024-06-04 14:50:10,186 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42613636363636365 [2024-06-04 14:50:10,186 INFO L175 Difference]: Start difference. First operand has 231 places, 673 transitions, 12950 flow. Second operand 8 states and 150 transitions. [2024-06-04 14:50:10,186 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 238 places, 699 transitions, 14448 flow [2024-06-04 14:50:10,727 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 234 places, 699 transitions, 14386 flow, removed 14 selfloop flow, removed 4 redundant places. [2024-06-04 14:50:10,737 INFO L231 Difference]: Finished difference. Result has 235 places, 675 transitions, 12989 flow [2024-06-04 14:50:10,738 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=12888, PETRI_DIFFERENCE_MINUEND_PLACES=227, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=673, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=655, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=12989, PETRI_PLACES=235, PETRI_TRANSITIONS=675} [2024-06-04 14:50:10,738 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 190 predicate places. [2024-06-04 14:50:10,738 INFO L495 AbstractCegarLoop]: Abstraction has has 235 places, 675 transitions, 12989 flow [2024-06-04 14:50:10,739 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) [2024-06-04 14:50:10,739 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:50:10,740 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:50:10,740 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2024-06-04 14:50:10,740 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 14:50:10,740 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:50:10,740 INFO L85 PathProgramCache]: Analyzing trace with hash 1730760441, now seen corresponding path program 1 times [2024-06-04 14:50:10,741 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:50:10,741 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [711538778] [2024-06-04 14:50:10,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:50:10,741 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:50:10,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:50:11,696 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:50:11,697 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:50:11,697 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [711538778] [2024-06-04 14:50:11,697 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [711538778] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:50:11,697 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:50:11,697 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 14:50:11,698 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [377729628] [2024-06-04 14:50:11,698 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:50:11,698 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 14:50:11,698 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:50:11,698 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 14:50:11,699 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-04 14:50:11,785 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-04 14:50:11,785 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 235 places, 675 transitions, 12989 flow. Second operand has 8 states, 8 states have (on average 11.875) internal successors, (95), 8 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:50:11,785 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:50:11,785 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-04 14:50:11,785 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:50:13,344 INFO L124 PetriNetUnfolderBase]: 4624/7003 cut-off events. [2024-06-04 14:50:13,345 INFO L125 PetriNetUnfolderBase]: For 337794/338142 co-relation queries the response was YES. [2024-06-04 14:50:13,394 INFO L83 FinitePrefix]: Finished finitePrefix Result has 61699 conditions, 7003 events. 4624/7003 cut-off events. For 337794/338142 co-relation queries the response was YES. Maximal size of possible extension queue 371. Compared 38954 event pairs, 1464 based on Foata normal form. 120/6957 useless extension candidates. Maximal degree in co-relation 61599. Up to 6412 conditions per place. [2024-06-04 14:50:13,429 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 574 selfloop transitions, 34 changer transitions 0/703 dead transitions. [2024-06-04 14:50:13,429 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 241 places, 703 transitions, 14441 flow [2024-06-04 14:50:13,429 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 14:50:13,429 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 14:50:13,430 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 137 transitions. [2024-06-04 14:50:13,430 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4448051948051948 [2024-06-04 14:50:13,430 INFO L175 Difference]: Start difference. First operand has 235 places, 675 transitions, 12989 flow. Second operand 7 states and 137 transitions. [2024-06-04 14:50:13,430 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 241 places, 703 transitions, 14441 flow [2024-06-04 14:50:14,147 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 235 places, 703 transitions, 14358 flow, removed 25 selfloop flow, removed 6 redundant places. [2024-06-04 14:50:14,158 INFO L231 Difference]: Finished difference. Result has 237 places, 684 transitions, 13092 flow [2024-06-04 14:50:14,159 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=12906, PETRI_DIFFERENCE_MINUEND_PLACES=229, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=675, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=644, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=13092, PETRI_PLACES=237, PETRI_TRANSITIONS=684} [2024-06-04 14:50:14,159 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 192 predicate places. [2024-06-04 14:50:14,159 INFO L495 AbstractCegarLoop]: Abstraction has has 237 places, 684 transitions, 13092 flow [2024-06-04 14:50:14,159 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.875) internal successors, (95), 8 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:50:14,160 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:50:14,160 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:50:14,160 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2024-06-04 14:50:14,160 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 14:50:14,160 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:50:14,160 INFO L85 PathProgramCache]: Analyzing trace with hash 558119061, now seen corresponding path program 4 times [2024-06-04 14:50:14,160 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:50:14,160 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [356760876] [2024-06-04 14:50:14,160 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:50:14,160 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:50:14,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:50:15,316 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:50:15,317 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:50:15,317 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [356760876] [2024-06-04 14:50:15,317 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [356760876] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:50:15,317 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:50:15,317 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 14:50:15,317 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1040581358] [2024-06-04 14:50:15,317 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:50:15,317 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 14:50:15,317 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:50:15,318 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 14:50:15,318 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-06-04 14:50:15,444 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-04 14:50:15,444 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 237 places, 684 transitions, 13092 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) [2024-06-04 14:50:15,444 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:50:15,444 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-04 14:50:15,444 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:50:17,170 INFO L124 PetriNetUnfolderBase]: 5064/7588 cut-off events. [2024-06-04 14:50:17,170 INFO L125 PetriNetUnfolderBase]: For 369663/369820 co-relation queries the response was YES. [2024-06-04 14:50:17,221 INFO L83 FinitePrefix]: Finished finitePrefix Result has 67390 conditions, 7588 events. 5064/7588 cut-off events. For 369663/369820 co-relation queries the response was YES. Maximal size of possible extension queue 411. Compared 42571 event pairs, 1756 based on Foata normal form. 79/7547 useless extension candidates. Maximal degree in co-relation 67288. Up to 7102 conditions per place. [2024-06-04 14:50:17,258 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 634 selfloop transitions, 32 changer transitions 0/713 dead transitions. [2024-06-04 14:50:17,258 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 244 places, 713 transitions, 14668 flow [2024-06-04 14:50:17,259 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 14:50:17,259 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 14:50:17,259 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 151 transitions. [2024-06-04 14:50:17,259 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4289772727272727 [2024-06-04 14:50:17,259 INFO L175 Difference]: Start difference. First operand has 237 places, 684 transitions, 13092 flow. Second operand 8 states and 151 transitions. [2024-06-04 14:50:17,259 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 244 places, 713 transitions, 14668 flow [2024-06-04 14:50:17,963 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 242 places, 713 transitions, 14623 flow, removed 17 selfloop flow, removed 2 redundant places. [2024-06-04 14:50:17,973 INFO L231 Difference]: Finished difference. Result has 243 places, 686 transitions, 13185 flow [2024-06-04 14:50:17,974 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=13047, PETRI_DIFFERENCE_MINUEND_PLACES=235, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=684, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=652, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=13185, PETRI_PLACES=243, PETRI_TRANSITIONS=686} [2024-06-04 14:50:17,974 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 198 predicate places. [2024-06-04 14:50:17,974 INFO L495 AbstractCegarLoop]: Abstraction has has 243 places, 686 transitions, 13185 flow [2024-06-04 14:50:17,974 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) [2024-06-04 14:50:17,974 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:50:17,975 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:50:17,975 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2024-06-04 14:50:17,975 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 14:50:17,975 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:50:17,975 INFO L85 PathProgramCache]: Analyzing trace with hash 567949781, now seen corresponding path program 1 times [2024-06-04 14:50:17,975 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:50:17,975 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [851257596] [2024-06-04 14:50:17,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:50:17,976 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:50:17,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:50:19,076 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:50:19,076 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:50:19,076 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [851257596] [2024-06-04 14:50:19,077 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [851257596] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:50:19,077 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:50:19,077 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 14:50:19,077 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [519110860] [2024-06-04 14:50:19,077 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:50:19,077 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 14:50:19,077 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:50:19,077 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 14:50:19,077 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-04 14:50:19,190 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 44 [2024-06-04 14:50:19,190 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 243 places, 686 transitions, 13185 flow. Second operand has 10 states, 10 states have (on average 10.4) internal successors, (104), 10 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) [2024-06-04 14:50:19,190 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:50:19,190 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 44 [2024-06-04 14:50:19,190 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:50:21,015 INFO L124 PetriNetUnfolderBase]: 5396/8014 cut-off events. [2024-06-04 14:50:21,016 INFO L125 PetriNetUnfolderBase]: For 370103/370124 co-relation queries the response was YES. [2024-06-04 14:50:21,070 INFO L83 FinitePrefix]: Finished finitePrefix Result has 70754 conditions, 8014 events. 5396/8014 cut-off events. For 370103/370124 co-relation queries the response was YES. Maximal size of possible extension queue 400. Compared 44048 event pairs, 1939 based on Foata normal form. 2/7963 useless extension candidates. Maximal degree in co-relation 70649. Up to 7686 conditions per place. [2024-06-04 14:50:21,110 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 678 selfloop transitions, 48 changer transitions 0/734 dead transitions. [2024-06-04 14:50:21,110 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 250 places, 734 transitions, 15275 flow [2024-06-04 14:50:21,111 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 14:50:21,111 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 14:50:21,111 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 145 transitions. [2024-06-04 14:50:21,111 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4119318181818182 [2024-06-04 14:50:21,112 INFO L175 Difference]: Start difference. First operand has 243 places, 686 transitions, 13185 flow. Second operand 8 states and 145 transitions. [2024-06-04 14:50:21,112 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 250 places, 734 transitions, 15275 flow [2024-06-04 14:50:21,948 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 245 places, 734 transitions, 15167 flow, removed 28 selfloop flow, removed 5 redundant places. [2024-06-04 14:50:21,959 INFO L231 Difference]: Finished difference. Result has 246 places, 704 transitions, 13629 flow [2024-06-04 14:50:21,959 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=13077, PETRI_DIFFERENCE_MINUEND_PLACES=238, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=686, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=638, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=13629, PETRI_PLACES=246, PETRI_TRANSITIONS=704} [2024-06-04 14:50:21,959 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 201 predicate places. [2024-06-04 14:50:21,959 INFO L495 AbstractCegarLoop]: Abstraction has has 246 places, 704 transitions, 13629 flow [2024-06-04 14:50:21,960 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.4) internal successors, (104), 10 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) [2024-06-04 14:50:21,960 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:50:21,960 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:50:21,960 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2024-06-04 14:50:21,960 INFO L420 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 14:50:21,960 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:50:21,961 INFO L85 PathProgramCache]: Analyzing trace with hash -1370856821, now seen corresponding path program 5 times [2024-06-04 14:50:21,961 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:50:21,961 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1941460144] [2024-06-04 14:50:21,961 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:50:21,961 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:50:21,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:50:23,190 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:50:23,191 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:50:23,191 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1941460144] [2024-06-04 14:50:23,191 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1941460144] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:50:23,191 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:50:23,191 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 14:50:23,191 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [251958475] [2024-06-04 14:50:23,191 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:50:23,191 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 14:50:23,192 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:50:23,192 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 14:50:23,192 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-04 14:50:23,305 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-04 14:50:23,305 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 246 places, 704 transitions, 13629 flow. Second operand has 9 states, 9 states have (on average 11.555555555555555) internal successors, (104), 9 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) [2024-06-04 14:50:23,305 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:50:23,305 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-04 14:50:23,306 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:50:25,003 INFO L124 PetriNetUnfolderBase]: 5102/7645 cut-off events. [2024-06-04 14:50:25,003 INFO L125 PetriNetUnfolderBase]: For 400241/400413 co-relation queries the response was YES. [2024-06-04 14:50:25,055 INFO L83 FinitePrefix]: Finished finitePrefix Result has 68861 conditions, 7645 events. 5102/7645 cut-off events. For 400241/400413 co-relation queries the response was YES. Maximal size of possible extension queue 418. Compared 42899 event pairs, 1746 based on Foata normal form. 86/7612 useless extension candidates. Maximal degree in co-relation 68755. Up to 7128 conditions per place. [2024-06-04 14:50:25,091 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 642 selfloop transitions, 44 changer transitions 0/740 dead transitions. [2024-06-04 14:50:25,092 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 253 places, 740 transitions, 15379 flow [2024-06-04 14:50:25,092 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 14:50:25,092 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 14:50:25,093 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 153 transitions. [2024-06-04 14:50:25,093 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4346590909090909 [2024-06-04 14:50:25,093 INFO L175 Difference]: Start difference. First operand has 246 places, 704 transitions, 13629 flow. Second operand 8 states and 153 transitions. [2024-06-04 14:50:25,093 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 253 places, 740 transitions, 15379 flow [2024-06-04 14:50:25,877 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 247 places, 740 transitions, 15255 flow, removed 26 selfloop flow, removed 6 redundant places. [2024-06-04 14:50:25,887 INFO L231 Difference]: Finished difference. Result has 249 places, 711 transitions, 13812 flow [2024-06-04 14:50:25,888 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=13505, PETRI_DIFFERENCE_MINUEND_PLACES=240, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=704, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=664, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=13812, PETRI_PLACES=249, PETRI_TRANSITIONS=711} [2024-06-04 14:50:25,888 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 204 predicate places. [2024-06-04 14:50:25,888 INFO L495 AbstractCegarLoop]: Abstraction has has 249 places, 711 transitions, 13812 flow [2024-06-04 14:50:25,888 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.555555555555555) internal successors, (104), 9 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) [2024-06-04 14:50:25,888 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:50:25,889 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:50:25,889 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2024-06-04 14:50:25,889 INFO L420 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 14:50:25,889 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:50:25,889 INFO L85 PathProgramCache]: Analyzing trace with hash -1371103085, now seen corresponding path program 15 times [2024-06-04 14:50:25,889 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:50:25,890 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [881832938] [2024-06-04 14:50:25,890 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:50:25,890 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:50:25,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:50:27,026 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:50:27,026 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:50:27,026 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [881832938] [2024-06-04 14:50:27,026 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [881832938] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:50:27,027 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:50:27,027 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 14:50:27,027 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2137342062] [2024-06-04 14:50:27,027 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:50:27,027 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 14:50:27,027 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:50:27,028 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 14:50:27,028 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-04 14:50:27,179 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-04 14:50:27,180 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 249 places, 711 transitions, 13812 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) [2024-06-04 14:50:27,180 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:50:27,180 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-04 14:50:27,180 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:50:28,811 INFO L124 PetriNetUnfolderBase]: 4515/6869 cut-off events. [2024-06-04 14:50:28,811 INFO L125 PetriNetUnfolderBase]: For 384049/384072 co-relation queries the response was YES. [2024-06-04 14:50:28,855 INFO L83 FinitePrefix]: Finished finitePrefix Result has 63137 conditions, 6869 events. 4515/6869 cut-off events. For 384049/384072 co-relation queries the response was YES. Maximal size of possible extension queue 397. Compared 39480 event pairs, 1422 based on Foata normal form. 15/6825 useless extension candidates. Maximal degree in co-relation 63029. Up to 6176 conditions per place. [2024-06-04 14:50:28,888 INFO L140 encePairwiseOnDemand]: 31/44 looper letters, 636 selfloop transitions, 105 changer transitions 0/754 dead transitions. [2024-06-04 14:50:28,889 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 257 places, 754 transitions, 15713 flow [2024-06-04 14:50:28,889 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 14:50:28,889 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 14:50:28,890 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 170 transitions. [2024-06-04 14:50:28,890 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4292929292929293 [2024-06-04 14:50:28,890 INFO L175 Difference]: Start difference. First operand has 249 places, 711 transitions, 13812 flow. Second operand 9 states and 170 transitions. [2024-06-04 14:50:28,890 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 257 places, 754 transitions, 15713 flow [2024-06-04 14:50:29,974 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 252 places, 754 transitions, 15186 flow, removed 223 selfloop flow, removed 5 redundant places. [2024-06-04 14:50:29,984 INFO L231 Difference]: Finished difference. Result has 253 places, 711 transitions, 13522 flow [2024-06-04 14:50:29,984 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=13285, PETRI_DIFFERENCE_MINUEND_PLACES=244, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=711, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=105, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=606, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=13522, PETRI_PLACES=253, PETRI_TRANSITIONS=711} [2024-06-04 14:50:29,985 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 208 predicate places. [2024-06-04 14:50:29,985 INFO L495 AbstractCegarLoop]: Abstraction has has 253 places, 711 transitions, 13522 flow [2024-06-04 14:50:29,985 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) [2024-06-04 14:50:29,985 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:50:29,985 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:50:29,985 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2024-06-04 14:50:29,986 INFO L420 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 14:50:29,986 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:50:29,986 INFO L85 PathProgramCache]: Analyzing trace with hash 1529260505, now seen corresponding path program 3 times [2024-06-04 14:50:29,986 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:50:29,986 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1514448300] [2024-06-04 14:50:29,986 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:50:29,987 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:50:29,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:50:30,757 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:50:30,757 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:50:30,757 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1514448300] [2024-06-04 14:50:30,757 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1514448300] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:50:30,757 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:50:30,757 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-04 14:50:30,758 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1776736985] [2024-06-04 14:50:30,758 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:50:30,758 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-04 14:50:30,758 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:50:30,758 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-04 14:50:30,758 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-04 14:50:30,813 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-04 14:50:30,813 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 253 places, 711 transitions, 13522 flow. Second operand has 7 states, 7 states have (on average 12.0) internal successors, (84), 7 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:50:30,813 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:50:30,813 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-04 14:50:30,813 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:50:32,418 INFO L124 PetriNetUnfolderBase]: 4691/7054 cut-off events. [2024-06-04 14:50:32,418 INFO L125 PetriNetUnfolderBase]: For 391844/392297 co-relation queries the response was YES. [2024-06-04 14:50:32,464 INFO L83 FinitePrefix]: Finished finitePrefix Result has 63946 conditions, 7054 events. 4691/7054 cut-off events. For 391844/392297 co-relation queries the response was YES. Maximal size of possible extension queue 379. Compared 38947 event pairs, 1590 based on Foata normal form. 160/7022 useless extension candidates. Maximal degree in co-relation 63837. Up to 6542 conditions per place. [2024-06-04 14:50:32,496 INFO L140 encePairwiseOnDemand]: 36/44 looper letters, 605 selfloop transitions, 12 changer transitions 0/719 dead transitions. [2024-06-04 14:50:32,497 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 258 places, 719 transitions, 14792 flow [2024-06-04 14:50:32,497 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-04 14:50:32,497 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-04 14:50:32,497 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 108 transitions. [2024-06-04 14:50:32,498 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4090909090909091 [2024-06-04 14:50:32,498 INFO L175 Difference]: Start difference. First operand has 253 places, 711 transitions, 13522 flow. Second operand 6 states and 108 transitions. [2024-06-04 14:50:32,498 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 258 places, 719 transitions, 14792 flow [2024-06-04 14:50:33,123 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 249 places, 719 transitions, 13909 flow, removed 62 selfloop flow, removed 9 redundant places. [2024-06-04 14:50:33,133 INFO L231 Difference]: Finished difference. Result has 250 places, 711 transitions, 12669 flow [2024-06-04 14:50:33,133 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=12639, PETRI_DIFFERENCE_MINUEND_PLACES=244, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=711, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=699, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=12669, PETRI_PLACES=250, PETRI_TRANSITIONS=711} [2024-06-04 14:50:33,133 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 205 predicate places. [2024-06-04 14:50:33,134 INFO L495 AbstractCegarLoop]: Abstraction has has 250 places, 711 transitions, 12669 flow [2024-06-04 14:50:33,134 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 12.0) internal successors, (84), 7 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:50:33,134 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:50:33,134 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:50:33,134 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2024-06-04 14:50:33,134 INFO L420 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 14:50:33,135 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:50:33,135 INFO L85 PathProgramCache]: Analyzing trace with hash 1523554521, now seen corresponding path program 1 times [2024-06-04 14:50:33,135 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:50:33,135 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [902780171] [2024-06-04 14:50:33,135 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:50:33,135 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:50:33,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:50:33,893 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:50:33,893 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:50:33,893 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [902780171] [2024-06-04 14:50:33,893 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [902780171] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:50:33,893 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:50:33,893 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-04 14:50:33,894 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1875536506] [2024-06-04 14:50:33,894 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:50:33,894 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-04 14:50:33,894 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:50:33,894 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-04 14:50:33,894 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-04 14:50:33,951 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 44 [2024-06-04 14:50:33,951 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 250 places, 711 transitions, 12669 flow. Second operand has 7 states, 7 states have (on average 11.0) internal successors, (77), 7 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:50:33,951 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:50:33,951 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 44 [2024-06-04 14:50:33,951 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:50:35,574 INFO L124 PetriNetUnfolderBase]: 5147/7678 cut-off events. [2024-06-04 14:50:35,574 INFO L125 PetriNetUnfolderBase]: For 332442/332591 co-relation queries the response was YES. [2024-06-04 14:50:35,633 INFO L83 FinitePrefix]: Finished finitePrefix Result has 65236 conditions, 7678 events. 5147/7678 cut-off events. For 332442/332591 co-relation queries the response was YES. Maximal size of possible extension queue 413. Compared 42303 event pairs, 1863 based on Foata normal form. 79/7685 useless extension candidates. Maximal degree in co-relation 65126. Up to 7333 conditions per place. [2024-06-04 14:50:35,670 INFO L140 encePairwiseOnDemand]: 36/44 looper letters, 663 selfloop transitions, 17 changer transitions 0/729 dead transitions. [2024-06-04 14:50:35,670 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 255 places, 729 transitions, 14217 flow [2024-06-04 14:50:35,671 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-04 14:50:35,671 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-04 14:50:35,671 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 109 transitions. [2024-06-04 14:50:35,671 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4128787878787879 [2024-06-04 14:50:35,671 INFO L175 Difference]: Start difference. First operand has 250 places, 711 transitions, 12669 flow. Second operand 6 states and 109 transitions. [2024-06-04 14:50:35,671 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 255 places, 729 transitions, 14217 flow [2024-06-04 14:50:36,405 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 249 places, 729 transitions, 14120 flow, removed 18 selfloop flow, removed 6 redundant places. [2024-06-04 14:50:36,414 INFO L231 Difference]: Finished difference. Result has 250 places, 717 transitions, 12672 flow [2024-06-04 14:50:36,415 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=12574, PETRI_DIFFERENCE_MINUEND_PLACES=244, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=711, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=697, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=12672, PETRI_PLACES=250, PETRI_TRANSITIONS=717} [2024-06-04 14:50:36,415 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 205 predicate places. [2024-06-04 14:50:36,415 INFO L495 AbstractCegarLoop]: Abstraction has has 250 places, 717 transitions, 12672 flow [2024-06-04 14:50:36,415 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 11.0) internal successors, (77), 7 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:50:36,416 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:50:36,416 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:50:36,416 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2024-06-04 14:50:36,416 INFO L420 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 14:50:36,417 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:50:36,417 INFO L85 PathProgramCache]: Analyzing trace with hash 1987751931, now seen corresponding path program 2 times [2024-06-04 14:50:36,417 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:50:36,417 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [784406647] [2024-06-04 14:50:36,417 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:50:36,417 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:50:36,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:50:37,133 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:50:37,133 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:50:37,133 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [784406647] [2024-06-04 14:50:37,133 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [784406647] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:50:37,133 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:50:37,133 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-04 14:50:37,133 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [944714909] [2024-06-04 14:50:37,133 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:50:37,134 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-04 14:50:37,134 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:50:37,134 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-04 14:50:37,134 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-04 14:50:37,194 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 44 [2024-06-04 14:50:37,194 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 250 places, 717 transitions, 12672 flow. Second operand has 7 states, 7 states have (on average 11.0) internal successors, (77), 7 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:50:37,194 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:50:37,194 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 44 [2024-06-04 14:50:37,194 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:50:38,877 INFO L124 PetriNetUnfolderBase]: 5148/7678 cut-off events. [2024-06-04 14:50:38,877 INFO L125 PetriNetUnfolderBase]: For 331143/331292 co-relation queries the response was YES. [2024-06-04 14:50:38,938 INFO L83 FinitePrefix]: Finished finitePrefix Result has 65553 conditions, 7678 events. 5148/7678 cut-off events. For 331143/331292 co-relation queries the response was YES. Maximal size of possible extension queue 412. Compared 42323 event pairs, 1880 based on Foata normal form. 79/7687 useless extension candidates. Maximal degree in co-relation 65443. Up to 7334 conditions per place. [2024-06-04 14:50:38,976 INFO L140 encePairwiseOnDemand]: 36/44 looper letters, 659 selfloop transitions, 17 changer transitions 0/725 dead transitions. [2024-06-04 14:50:38,976 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 255 places, 725 transitions, 14060 flow [2024-06-04 14:50:38,976 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-04 14:50:38,976 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-04 14:50:38,977 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 105 transitions. [2024-06-04 14:50:38,977 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3977272727272727 [2024-06-04 14:50:38,977 INFO L175 Difference]: Start difference. First operand has 250 places, 717 transitions, 12672 flow. Second operand 6 states and 105 transitions. [2024-06-04 14:50:38,977 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 255 places, 725 transitions, 14060 flow [2024-06-04 14:50:39,694 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 252 places, 725 transitions, 13976 flow, removed 25 selfloop flow, removed 3 redundant places. [2024-06-04 14:50:39,704 INFO L231 Difference]: Finished difference. Result has 253 places, 717 transitions, 12628 flow [2024-06-04 14:50:39,705 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=12588, PETRI_DIFFERENCE_MINUEND_PLACES=247, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=717, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=700, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=12628, PETRI_PLACES=253, PETRI_TRANSITIONS=717} [2024-06-04 14:50:39,705 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 208 predicate places. [2024-06-04 14:50:39,705 INFO L495 AbstractCegarLoop]: Abstraction has has 253 places, 717 transitions, 12628 flow [2024-06-04 14:50:39,705 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 11.0) internal successors, (77), 7 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:50:39,705 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:50:39,705 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:50:39,705 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2024-06-04 14:50:39,705 INFO L420 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 14:50:39,706 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:50:39,706 INFO L85 PathProgramCache]: Analyzing trace with hash 2135230660, now seen corresponding path program 1 times [2024-06-04 14:50:39,706 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:50:39,706 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1577669823] [2024-06-04 14:50:39,706 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:50:39,706 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:50:39,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:50:40,532 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:50:40,533 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:50:40,533 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1577669823] [2024-06-04 14:50:40,533 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1577669823] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:50:40,534 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:50:40,534 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 14:50:40,534 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1857267674] [2024-06-04 14:50:40,534 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:50:40,534 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 14:50:40,534 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:50:40,534 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 14:50:40,535 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2024-06-04 14:50:40,699 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-04 14:50:40,699 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 253 places, 717 transitions, 12628 flow. Second operand has 10 states, 10 states have (on average 11.5) internal successors, (115), 10 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:50:40,699 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:50:40,699 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-04 14:50:40,699 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:50:42,456 INFO L124 PetriNetUnfolderBase]: 4637/7059 cut-off events. [2024-06-04 14:50:42,456 INFO L125 PetriNetUnfolderBase]: For 343550/343577 co-relation queries the response was YES. [2024-06-04 14:50:42,514 INFO L83 FinitePrefix]: Finished finitePrefix Result has 61496 conditions, 7059 events. 4637/7059 cut-off events. For 343550/343577 co-relation queries the response was YES. Maximal size of possible extension queue 413. Compared 40824 event pairs, 1193 based on Foata normal form. 12/7014 useless extension candidates. Maximal degree in co-relation 61385. Up to 6044 conditions per place. [2024-06-04 14:50:42,550 INFO L140 encePairwiseOnDemand]: 30/44 looper letters, 619 selfloop transitions, 157 changer transitions 0/793 dead transitions. [2024-06-04 14:50:42,551 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 264 places, 793 transitions, 15047 flow [2024-06-04 14:50:42,551 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-04 14:50:42,551 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-04 14:50:42,552 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 239 transitions. [2024-06-04 14:50:42,552 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45265151515151514 [2024-06-04 14:50:42,552 INFO L175 Difference]: Start difference. First operand has 253 places, 717 transitions, 12628 flow. Second operand 12 states and 239 transitions. [2024-06-04 14:50:42,552 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 264 places, 793 transitions, 15047 flow [2024-06-04 14:50:43,297 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 258 places, 793 transitions, 15001 flow, removed 2 selfloop flow, removed 6 redundant places. [2024-06-04 14:50:43,308 INFO L231 Difference]: Finished difference. Result has 261 places, 740 transitions, 13344 flow [2024-06-04 14:50:43,308 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=12582, PETRI_DIFFERENCE_MINUEND_PLACES=247, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=717, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=137, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=578, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=13344, PETRI_PLACES=261, PETRI_TRANSITIONS=740} [2024-06-04 14:50:43,308 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 216 predicate places. [2024-06-04 14:50:43,308 INFO L495 AbstractCegarLoop]: Abstraction has has 261 places, 740 transitions, 13344 flow [2024-06-04 14:50:43,309 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.5) internal successors, (115), 10 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:50:43,309 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:50:43,309 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:50:43,309 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2024-06-04 14:50:43,309 INFO L420 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 14:50:43,309 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:50:43,309 INFO L85 PathProgramCache]: Analyzing trace with hash -471414686, now seen corresponding path program 2 times [2024-06-04 14:50:43,309 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:50:43,309 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [515822345] [2024-06-04 14:50:43,309 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:50:43,309 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:50:43,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:50:44,589 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:50:44,589 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:50:44,589 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [515822345] [2024-06-04 14:50:44,589 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [515822345] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:50:44,589 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:50:44,589 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-04 14:50:44,589 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [888717519] [2024-06-04 14:50:44,590 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:50:44,590 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-04 14:50:44,590 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:50:44,590 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-04 14:50:44,590 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2024-06-04 14:50:44,755 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-04 14:50:44,755 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 261 places, 740 transitions, 13344 flow. Second operand has 11 states, 11 states have (on average 11.363636363636363) internal successors, (125), 11 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) [2024-06-04 14:50:44,756 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:50:44,756 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-04 14:50:44,756 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:50:46,614 INFO L124 PetriNetUnfolderBase]: 4655/7074 cut-off events. [2024-06-04 14:50:46,615 INFO L125 PetriNetUnfolderBase]: For 360770/360791 co-relation queries the response was YES. [2024-06-04 14:50:46,669 INFO L83 FinitePrefix]: Finished finitePrefix Result has 63242 conditions, 7074 events. 4655/7074 cut-off events. For 360770/360791 co-relation queries the response was YES. Maximal size of possible extension queue 410. Compared 40760 event pairs, 990 based on Foata normal form. 10/7035 useless extension candidates. Maximal degree in co-relation 63129. Up to 5465 conditions per place. [2024-06-04 14:50:46,704 INFO L140 encePairwiseOnDemand]: 28/44 looper letters, 445 selfloop transitions, 344 changer transitions 0/806 dead transitions. [2024-06-04 14:50:46,705 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 271 places, 806 transitions, 15604 flow [2024-06-04 14:50:46,705 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-04 14:50:46,705 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-04 14:50:46,706 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 222 transitions. [2024-06-04 14:50:46,706 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45867768595041325 [2024-06-04 14:50:46,706 INFO L175 Difference]: Start difference. First operand has 261 places, 740 transitions, 13344 flow. Second operand 11 states and 222 transitions. [2024-06-04 14:50:46,706 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 271 places, 806 transitions, 15604 flow [2024-06-04 14:50:47,520 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 267 places, 806 transitions, 15444 flow, removed 53 selfloop flow, removed 4 redundant places. [2024-06-04 14:50:47,534 INFO L231 Difference]: Finished difference. Result has 268 places, 743 transitions, 13966 flow [2024-06-04 14:50:47,534 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=13194, PETRI_DIFFERENCE_MINUEND_PLACES=257, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=740, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=341, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=396, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=13966, PETRI_PLACES=268, PETRI_TRANSITIONS=743} [2024-06-04 14:50:47,535 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 223 predicate places. [2024-06-04 14:50:47,535 INFO L495 AbstractCegarLoop]: Abstraction has has 268 places, 743 transitions, 13966 flow [2024-06-04 14:50:47,535 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.363636363636363) internal successors, (125), 11 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) [2024-06-04 14:50:47,535 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:50:47,536 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:50:47,536 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2024-06-04 14:50:47,536 INFO L420 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 14:50:47,536 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:50:47,536 INFO L85 PathProgramCache]: Analyzing trace with hash -628945526, now seen corresponding path program 3 times [2024-06-04 14:50:47,536 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:50:47,537 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [159720346] [2024-06-04 14:50:47,537 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:50:47,537 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:50:47,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:50:48,679 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:50:48,679 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:50:48,679 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [159720346] [2024-06-04 14:50:48,679 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [159720346] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:50:48,679 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:50:48,679 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-04 14:50:48,679 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1987761378] [2024-06-04 14:50:48,679 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:50:48,680 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-04 14:50:48,680 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:50:48,680 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-04 14:50:48,680 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-06-04 14:50:48,927 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-04 14:50:48,928 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 268 places, 743 transitions, 13966 flow. Second operand has 11 states, 11 states have (on average 11.363636363636363) internal successors, (125), 11 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) [2024-06-04 14:50:48,928 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:50:48,928 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-04 14:50:48,928 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:50:50,861 INFO L124 PetriNetUnfolderBase]: 4733/7200 cut-off events. [2024-06-04 14:50:50,861 INFO L125 PetriNetUnfolderBase]: For 384286/384309 co-relation queries the response was YES. [2024-06-04 14:50:50,921 INFO L83 FinitePrefix]: Finished finitePrefix Result has 65762 conditions, 7200 events. 4733/7200 cut-off events. For 384286/384309 co-relation queries the response was YES. Maximal size of possible extension queue 428. Compared 41881 event pairs, 1270 based on Foata normal form. 14/7156 useless extension candidates. Maximal degree in co-relation 65647. Up to 6454 conditions per place. [2024-06-04 14:50:50,958 INFO L140 encePairwiseOnDemand]: 29/44 looper letters, 653 selfloop transitions, 135 changer transitions 0/805 dead transitions. [2024-06-04 14:50:50,958 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 279 places, 805 transitions, 15984 flow [2024-06-04 14:50:50,959 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-04 14:50:50,959 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-04 14:50:50,959 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 233 transitions. [2024-06-04 14:50:50,959 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4412878787878788 [2024-06-04 14:50:50,959 INFO L175 Difference]: Start difference. First operand has 268 places, 743 transitions, 13966 flow. Second operand 12 states and 233 transitions. [2024-06-04 14:50:50,959 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 279 places, 805 transitions, 15984 flow [2024-06-04 14:50:51,698 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 271 places, 805 transitions, 15339 flow, removed 31 selfloop flow, removed 8 redundant places. [2024-06-04 14:50:51,709 INFO L231 Difference]: Finished difference. Result has 273 places, 758 transitions, 13837 flow [2024-06-04 14:50:51,710 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=13321, PETRI_DIFFERENCE_MINUEND_PLACES=260, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=743, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=120, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=608, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=13837, PETRI_PLACES=273, PETRI_TRANSITIONS=758} [2024-06-04 14:50:51,710 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 228 predicate places. [2024-06-04 14:50:51,710 INFO L495 AbstractCegarLoop]: Abstraction has has 273 places, 758 transitions, 13837 flow [2024-06-04 14:50:51,711 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.363636363636363) internal successors, (125), 11 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) [2024-06-04 14:50:51,711 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:50:51,711 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:50:51,711 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2024-06-04 14:50:51,711 INFO L420 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 14:50:51,711 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:50:51,711 INFO L85 PathProgramCache]: Analyzing trace with hash -1942486000, now seen corresponding path program 4 times [2024-06-04 14:50:51,711 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:50:51,711 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1002791586] [2024-06-04 14:50:51,711 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:50:51,712 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:50:51,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:50:53,092 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:50:53,092 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:50:53,092 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1002791586] [2024-06-04 14:50:53,092 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1002791586] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:50:53,092 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:50:53,092 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-04 14:50:53,093 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [620404473] [2024-06-04 14:50:53,093 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:50:53,093 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-04 14:50:53,093 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:50:53,093 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-04 14:50:53,093 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2024-06-04 14:50:53,278 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-04 14:50:53,279 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 273 places, 758 transitions, 13837 flow. Second operand has 11 states, 11 states have (on average 11.363636363636363) internal successors, (125), 11 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) [2024-06-04 14:50:53,279 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:50:53,279 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-04 14:50:53,279 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:50:55,303 INFO L124 PetriNetUnfolderBase]: 4829/7366 cut-off events. [2024-06-04 14:50:55,303 INFO L125 PetriNetUnfolderBase]: For 385088/385103 co-relation queries the response was YES. [2024-06-04 14:50:55,360 INFO L83 FinitePrefix]: Finished finitePrefix Result has 66165 conditions, 7366 events. 4829/7366 cut-off events. For 385088/385103 co-relation queries the response was YES. Maximal size of possible extension queue 441. Compared 42993 event pairs, 1255 based on Foata normal form. 12/7328 useless extension candidates. Maximal degree in co-relation 66048. Up to 6563 conditions per place. [2024-06-04 14:50:55,395 INFO L140 encePairwiseOnDemand]: 29/44 looper letters, 668 selfloop transitions, 140 changer transitions 0/825 dead transitions. [2024-06-04 14:50:55,396 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 284 places, 825 transitions, 16010 flow [2024-06-04 14:50:55,400 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-04 14:50:55,400 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-04 14:50:55,401 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 233 transitions. [2024-06-04 14:50:55,401 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4412878787878788 [2024-06-04 14:50:55,401 INFO L175 Difference]: Start difference. First operand has 273 places, 758 transitions, 13837 flow. Second operand 12 states and 233 transitions. [2024-06-04 14:50:55,401 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 284 places, 825 transitions, 16010 flow [2024-06-04 14:50:56,266 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 275 places, 825 transitions, 15624 flow, removed 70 selfloop flow, removed 9 redundant places. [2024-06-04 14:50:56,278 INFO L231 Difference]: Finished difference. Result has 277 places, 779 transitions, 14128 flow [2024-06-04 14:50:56,278 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=13500, PETRI_DIFFERENCE_MINUEND_PLACES=264, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=758, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=119, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=618, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=14128, PETRI_PLACES=277, PETRI_TRANSITIONS=779} [2024-06-04 14:50:56,278 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 232 predicate places. [2024-06-04 14:50:56,278 INFO L495 AbstractCegarLoop]: Abstraction has has 277 places, 779 transitions, 14128 flow [2024-06-04 14:50:56,278 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.363636363636363) internal successors, (125), 11 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) [2024-06-04 14:50:56,279 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:50:56,279 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:50:56,279 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2024-06-04 14:50:56,279 INFO L420 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 14:50:56,279 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:50:56,279 INFO L85 PathProgramCache]: Analyzing trace with hash -1824279280, now seen corresponding path program 5 times [2024-06-04 14:50:56,279 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:50:56,279 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [524251517] [2024-06-04 14:50:56,279 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:50:56,279 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:50:56,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:50:57,552 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:50:57,552 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:50:57,552 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [524251517] [2024-06-04 14:50:57,553 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [524251517] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:50:57,553 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:50:57,553 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-04 14:50:57,553 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [67611501] [2024-06-04 14:50:57,553 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:50:57,553 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-04 14:50:57,554 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:50:57,554 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-04 14:50:57,554 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2024-06-04 14:50:57,703 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-04 14:50:57,703 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 277 places, 779 transitions, 14128 flow. Second operand has 11 states, 11 states have (on average 11.363636363636363) internal successors, (125), 11 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) [2024-06-04 14:50:57,703 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:50:57,703 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-04 14:50:57,703 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:50:59,787 INFO L124 PetriNetUnfolderBase]: 4850/7388 cut-off events. [2024-06-04 14:50:59,787 INFO L125 PetriNetUnfolderBase]: For 398484/398500 co-relation queries the response was YES. [2024-06-04 14:50:59,849 INFO L83 FinitePrefix]: Finished finitePrefix Result has 66873 conditions, 7388 events. 4850/7388 cut-off events. For 398484/398500 co-relation queries the response was YES. Maximal size of possible extension queue 439. Compared 42982 event pairs, 1011 based on Foata normal form. 10/7356 useless extension candidates. Maximal degree in co-relation 66754. Up to 5425 conditions per place. [2024-06-04 14:50:59,887 INFO L140 encePairwiseOnDemand]: 28/44 looper letters, 411 selfloop transitions, 413 changer transitions 0/841 dead transitions. [2024-06-04 14:50:59,887 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 287 places, 841 transitions, 16347 flow [2024-06-04 14:50:59,888 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-04 14:50:59,888 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-04 14:50:59,888 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 224 transitions. [2024-06-04 14:50:59,888 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4628099173553719 [2024-06-04 14:50:59,888 INFO L175 Difference]: Start difference. First operand has 277 places, 779 transitions, 14128 flow. Second operand 11 states and 224 transitions. [2024-06-04 14:50:59,889 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 287 places, 841 transitions, 16347 flow [2024-06-04 14:51:00,891 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 279 places, 841 transitions, 16045 flow, removed 48 selfloop flow, removed 8 redundant places. [2024-06-04 14:51:00,903 INFO L231 Difference]: Finished difference. Result has 280 places, 785 transitions, 14766 flow [2024-06-04 14:51:00,904 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=13826, PETRI_DIFFERENCE_MINUEND_PLACES=269, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=779, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=407, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=366, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=14766, PETRI_PLACES=280, PETRI_TRANSITIONS=785} [2024-06-04 14:51:00,904 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 235 predicate places. [2024-06-04 14:51:00,904 INFO L495 AbstractCegarLoop]: Abstraction has has 280 places, 785 transitions, 14766 flow [2024-06-04 14:51:00,904 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.363636363636363) internal successors, (125), 11 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) [2024-06-04 14:51:00,904 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:51:00,904 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:51:00,905 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2024-06-04 14:51:00,905 INFO L420 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 14:51:00,905 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:51:00,905 INFO L85 PathProgramCache]: Analyzing trace with hash -1650727055, now seen corresponding path program 1 times [2024-06-04 14:51:00,905 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:51:00,905 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1346731974] [2024-06-04 14:51:00,905 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:51:00,905 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:51:00,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:51:01,985 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:51:01,985 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:51:01,985 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1346731974] [2024-06-04 14:51:01,985 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1346731974] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:51:01,985 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:51:01,985 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 14:51:01,985 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [309986238] [2024-06-04 14:51:01,985 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:51:01,985 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 14:51:01,986 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:51:01,986 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 14:51:01,986 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-04 14:51:02,093 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 44 [2024-06-04 14:51:02,094 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 280 places, 785 transitions, 14766 flow. Second operand has 10 states, 10 states have (on average 10.5) internal successors, (105), 10 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:51:02,094 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:51:02,094 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 44 [2024-06-04 14:51:02,094 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:51:04,123 INFO L124 PetriNetUnfolderBase]: 5821/8652 cut-off events. [2024-06-04 14:51:04,123 INFO L125 PetriNetUnfolderBase]: For 481984/482019 co-relation queries the response was YES. [2024-06-04 14:51:04,193 INFO L83 FinitePrefix]: Finished finitePrefix Result has 79157 conditions, 8652 events. 5821/8652 cut-off events. For 481984/482019 co-relation queries the response was YES. Maximal size of possible extension queue 452. Compared 48516 event pairs, 1515 based on Foata normal form. 10/8609 useless extension candidates. Maximal degree in co-relation 79037. Up to 7733 conditions per place. [2024-06-04 14:51:04,236 INFO L140 encePairwiseOnDemand]: 30/44 looper letters, 617 selfloop transitions, 224 changer transitions 0/851 dead transitions. [2024-06-04 14:51:04,236 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 289 places, 851 transitions, 17217 flow [2024-06-04 14:51:04,237 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-04 14:51:04,237 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-04 14:51:04,237 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 193 transitions. [2024-06-04 14:51:04,237 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43863636363636366 [2024-06-04 14:51:04,237 INFO L175 Difference]: Start difference. First operand has 280 places, 785 transitions, 14766 flow. Second operand 10 states and 193 transitions. [2024-06-04 14:51:04,237 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 289 places, 851 transitions, 17217 flow [2024-06-04 14:51:05,305 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 280 places, 851 transitions, 16454 flow, removed 31 selfloop flow, removed 9 redundant places. [2024-06-04 14:51:05,317 INFO L231 Difference]: Finished difference. Result has 283 places, 813 transitions, 15105 flow [2024-06-04 14:51:05,318 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=14009, PETRI_DIFFERENCE_MINUEND_PLACES=271, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=785, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=196, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=585, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=15105, PETRI_PLACES=283, PETRI_TRANSITIONS=813} [2024-06-04 14:51:05,318 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 238 predicate places. [2024-06-04 14:51:05,318 INFO L495 AbstractCegarLoop]: Abstraction has has 283 places, 813 transitions, 15105 flow [2024-06-04 14:51:05,318 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.5) internal successors, (105), 10 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:51:05,318 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:51:05,318 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:51:05,318 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2024-06-04 14:51:05,318 INFO L420 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 14:51:05,319 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:51:05,319 INFO L85 PathProgramCache]: Analyzing trace with hash -443476996, now seen corresponding path program 6 times [2024-06-04 14:51:05,319 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:51:05,319 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [785822800] [2024-06-04 14:51:05,319 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:51:05,319 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:51:05,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:51:06,520 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:51:06,520 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:51:06,521 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [785822800] [2024-06-04 14:51:06,521 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [785822800] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:51:06,521 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:51:06,521 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-04 14:51:06,521 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1070081185] [2024-06-04 14:51:06,521 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:51:06,521 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-04 14:51:06,521 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:51:06,521 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-04 14:51:06,522 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2024-06-04 14:51:06,700 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-04 14:51:06,700 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 283 places, 813 transitions, 15105 flow. Second operand has 11 states, 11 states have (on average 11.363636363636363) internal successors, (125), 11 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) [2024-06-04 14:51:06,700 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:51:06,700 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-04 14:51:06,700 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:51:08,778 INFO L124 PetriNetUnfolderBase]: 4938/7546 cut-off events. [2024-06-04 14:51:08,778 INFO L125 PetriNetUnfolderBase]: For 444809/444832 co-relation queries the response was YES. [2024-06-04 14:51:08,846 INFO L83 FinitePrefix]: Finished finitePrefix Result has 70069 conditions, 7546 events. 4938/7546 cut-off events. For 444809/444832 co-relation queries the response was YES. Maximal size of possible extension queue 446. Compared 44074 event pairs, 1019 based on Foata normal form. 8/7517 useless extension candidates. Maximal degree in co-relation 69946. Up to 5548 conditions per place. [2024-06-04 14:51:08,887 INFO L140 encePairwiseOnDemand]: 28/44 looper letters, 436 selfloop transitions, 412 changer transitions 0/866 dead transitions. [2024-06-04 14:51:08,887 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 293 places, 866 transitions, 17302 flow [2024-06-04 14:51:08,888 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-04 14:51:08,888 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-04 14:51:08,888 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 222 transitions. [2024-06-04 14:51:08,888 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45867768595041325 [2024-06-04 14:51:08,889 INFO L175 Difference]: Start difference. First operand has 283 places, 813 transitions, 15105 flow. Second operand 11 states and 222 transitions. [2024-06-04 14:51:08,889 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 293 places, 866 transitions, 17302 flow [2024-06-04 14:51:10,003 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 287 places, 866 transitions, 16787 flow, removed 80 selfloop flow, removed 6 redundant places. [2024-06-04 14:51:10,016 INFO L231 Difference]: Finished difference. Result has 288 places, 816 transitions, 15514 flow [2024-06-04 14:51:10,017 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=14590, PETRI_DIFFERENCE_MINUEND_PLACES=277, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=813, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=409, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=401, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=15514, PETRI_PLACES=288, PETRI_TRANSITIONS=816} [2024-06-04 14:51:10,017 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 243 predicate places. [2024-06-04 14:51:10,018 INFO L495 AbstractCegarLoop]: Abstraction has has 288 places, 816 transitions, 15514 flow [2024-06-04 14:51:10,018 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.363636363636363) internal successors, (125), 11 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) [2024-06-04 14:51:10,018 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:51:10,018 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:51:10,018 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2024-06-04 14:51:10,018 INFO L420 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 14:51:10,018 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:51:10,018 INFO L85 PathProgramCache]: Analyzing trace with hash -1402677241, now seen corresponding path program 1 times [2024-06-04 14:51:10,018 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:51:10,018 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [363126080] [2024-06-04 14:51:10,018 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:51:10,019 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:51:10,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:51:10,725 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:51:10,726 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:51:10,726 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [363126080] [2024-06-04 14:51:10,726 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [363126080] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:51:10,726 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:51:10,726 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 14:51:10,726 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [282015263] [2024-06-04 14:51:10,726 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:51:10,726 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 14:51:10,726 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:51:10,727 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 14:51:10,727 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2024-06-04 14:51:10,777 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 44 [2024-06-04 14:51:10,777 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 288 places, 816 transitions, 15514 flow. Second operand has 8 states, 8 states have (on average 10.875) internal successors, (87), 8 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:51:10,777 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:51:10,777 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 44 [2024-06-04 14:51:10,777 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:51:12,685 INFO L124 PetriNetUnfolderBase]: 5508/8277 cut-off events. [2024-06-04 14:51:12,685 INFO L125 PetriNetUnfolderBase]: For 489339/489507 co-relation queries the response was YES. [2024-06-04 14:51:12,757 INFO L83 FinitePrefix]: Finished finitePrefix Result has 76953 conditions, 8277 events. 5508/8277 cut-off events. For 489339/489507 co-relation queries the response was YES. Maximal size of possible extension queue 452. Compared 46751 event pairs, 1598 based on Foata normal form. 55/8258 useless extension candidates. Maximal degree in co-relation 76831. Up to 7766 conditions per place. [2024-06-04 14:51:12,799 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 744 selfloop transitions, 46 changer transitions 0/846 dead transitions. [2024-06-04 14:51:12,799 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 295 places, 846 transitions, 17394 flow [2024-06-04 14:51:12,800 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 14:51:12,800 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 14:51:12,800 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 149 transitions. [2024-06-04 14:51:12,800 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42329545454545453 [2024-06-04 14:51:12,800 INFO L175 Difference]: Start difference. First operand has 288 places, 816 transitions, 15514 flow. Second operand 8 states and 149 transitions. [2024-06-04 14:51:12,800 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 295 places, 846 transitions, 17394 flow [2024-06-04 14:51:13,897 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 286 places, 846 transitions, 16502 flow, removed 38 selfloop flow, removed 9 redundant places. [2024-06-04 14:51:13,909 INFO L231 Difference]: Finished difference. Result has 287 places, 822 transitions, 14808 flow [2024-06-04 14:51:13,910 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=14622, PETRI_DIFFERENCE_MINUEND_PLACES=279, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=816, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=773, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=14808, PETRI_PLACES=287, PETRI_TRANSITIONS=822} [2024-06-04 14:51:13,910 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 242 predicate places. [2024-06-04 14:51:13,910 INFO L495 AbstractCegarLoop]: Abstraction has has 287 places, 822 transitions, 14808 flow [2024-06-04 14:51:13,910 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.875) internal successors, (87), 8 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:51:13,910 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:51:13,910 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:51:13,910 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57 [2024-06-04 14:51:13,910 INFO L420 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 14:51:13,911 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:51:13,911 INFO L85 PathProgramCache]: Analyzing trace with hash 2067502750, now seen corresponding path program 7 times [2024-06-04 14:51:13,911 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:51:13,911 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1542331847] [2024-06-04 14:51:13,911 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:51:13,911 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:51:13,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:51:15,199 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:51:15,199 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:51:15,199 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1542331847] [2024-06-04 14:51:15,199 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1542331847] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:51:15,199 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:51:15,199 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-04 14:51:15,199 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1575988981] [2024-06-04 14:51:15,200 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:51:15,200 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-04 14:51:15,200 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:51:15,200 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-04 14:51:15,200 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-06-04 14:51:15,460 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-04 14:51:15,460 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 287 places, 822 transitions, 14808 flow. Second operand has 11 states, 11 states have (on average 11.363636363636363) internal successors, (125), 11 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) [2024-06-04 14:51:15,460 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:51:15,460 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-04 14:51:15,460 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:51:17,684 INFO L124 PetriNetUnfolderBase]: 5090/7789 cut-off events. [2024-06-04 14:51:17,684 INFO L125 PetriNetUnfolderBase]: For 456038/456079 co-relation queries the response was YES. [2024-06-04 14:51:17,748 INFO L83 FinitePrefix]: Finished finitePrefix Result has 71437 conditions, 7789 events. 5090/7789 cut-off events. For 456038/456079 co-relation queries the response was YES. Maximal size of possible extension queue 463. Compared 45654 event pairs, 945 based on Foata normal form. 8/7769 useless extension candidates. Maximal degree in co-relation 71314. Up to 6923 conditions per place. [2024-06-04 14:51:17,784 INFO L140 encePairwiseOnDemand]: 29/44 looper letters, 731 selfloop transitions, 143 changer transitions 0/894 dead transitions. [2024-06-04 14:51:17,784 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 298 places, 894 transitions, 17161 flow [2024-06-04 14:51:17,785 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-04 14:51:17,785 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-04 14:51:17,785 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 233 transitions. [2024-06-04 14:51:17,786 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4412878787878788 [2024-06-04 14:51:17,786 INFO L175 Difference]: Start difference. First operand has 287 places, 822 transitions, 14808 flow. Second operand 12 states and 233 transitions. [2024-06-04 14:51:17,786 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 298 places, 894 transitions, 17161 flow [2024-06-04 14:51:18,980 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 295 places, 894 transitions, 17091 flow, removed 21 selfloop flow, removed 3 redundant places. [2024-06-04 14:51:18,994 INFO L231 Difference]: Finished difference. Result has 297 places, 849 transitions, 15498 flow [2024-06-04 14:51:18,994 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=14738, PETRI_DIFFERENCE_MINUEND_PLACES=284, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=822, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=116, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=679, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=15498, PETRI_PLACES=297, PETRI_TRANSITIONS=849} [2024-06-04 14:51:18,995 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 252 predicate places. [2024-06-04 14:51:18,995 INFO L495 AbstractCegarLoop]: Abstraction has has 297 places, 849 transitions, 15498 flow [2024-06-04 14:51:18,995 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.363636363636363) internal successors, (125), 11 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) [2024-06-04 14:51:18,995 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:51:18,995 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:51:18,995 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58 [2024-06-04 14:51:18,995 INFO L420 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 14:51:18,995 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:51:18,995 INFO L85 PathProgramCache]: Analyzing trace with hash 2071312030, now seen corresponding path program 8 times [2024-06-04 14:51:18,995 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:51:18,996 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [308351348] [2024-06-04 14:51:18,996 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:51:18,996 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:51:19,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:51:20,428 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:51:20,428 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:51:20,428 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [308351348] [2024-06-04 14:51:20,428 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [308351348] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:51:20,429 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:51:20,429 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-04 14:51:20,429 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1118473151] [2024-06-04 14:51:20,429 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:51:20,429 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-04 14:51:20,429 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:51:20,429 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-04 14:51:20,429 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2024-06-04 14:51:20,603 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-04 14:51:20,604 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 297 places, 849 transitions, 15498 flow. Second operand has 11 states, 11 states have (on average 11.363636363636363) internal successors, (125), 11 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) [2024-06-04 14:51:20,604 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:51:20,604 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-04 14:51:20,604 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:51:22,922 INFO L124 PetriNetUnfolderBase]: 5138/7848 cut-off events. [2024-06-04 14:51:22,922 INFO L125 PetriNetUnfolderBase]: For 475734/475775 co-relation queries the response was YES. [2024-06-04 14:51:22,990 INFO L83 FinitePrefix]: Finished finitePrefix Result has 72875 conditions, 7848 events. 5138/7848 cut-off events. For 475734/475775 co-relation queries the response was YES. Maximal size of possible extension queue 471. Compared 46060 event pairs, 953 based on Foata normal form. 16/7831 useless extension candidates. Maximal degree in co-relation 72749. Up to 5525 conditions per place. [2024-06-04 14:51:23,029 INFO L140 encePairwiseOnDemand]: 28/44 looper letters, 413 selfloop transitions, 480 changer transitions 0/913 dead transitions. [2024-06-04 14:51:23,029 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 307 places, 913 transitions, 17877 flow [2024-06-04 14:51:23,030 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-04 14:51:23,030 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-04 14:51:23,030 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 225 transitions. [2024-06-04 14:51:23,030 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46487603305785125 [2024-06-04 14:51:23,030 INFO L175 Difference]: Start difference. First operand has 297 places, 849 transitions, 15498 flow. Second operand 11 states and 225 transitions. [2024-06-04 14:51:23,030 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 307 places, 913 transitions, 17877 flow [2024-06-04 14:51:24,294 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 300 places, 913 transitions, 17571 flow, removed 48 selfloop flow, removed 7 redundant places. [2024-06-04 14:51:24,308 INFO L231 Difference]: Finished difference. Result has 301 places, 858 transitions, 16313 flow [2024-06-04 14:51:24,308 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=15192, PETRI_DIFFERENCE_MINUEND_PLACES=290, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=849, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=471, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=369, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=16313, PETRI_PLACES=301, PETRI_TRANSITIONS=858} [2024-06-04 14:51:24,308 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 256 predicate places. [2024-06-04 14:51:24,309 INFO L495 AbstractCegarLoop]: Abstraction has has 301 places, 858 transitions, 16313 flow [2024-06-04 14:51:24,309 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.363636363636363) internal successors, (125), 11 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) [2024-06-04 14:51:24,309 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:51:24,309 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:51:24,309 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59 [2024-06-04 14:51:24,309 INFO L420 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 14:51:24,310 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:51:24,310 INFO L85 PathProgramCache]: Analyzing trace with hash 1722606798, now seen corresponding path program 9 times [2024-06-04 14:51:24,310 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:51:24,310 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1761229237] [2024-06-04 14:51:24,310 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:51:24,310 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:51:24,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:51:25,723 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:51:25,723 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:51:25,723 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1761229237] [2024-06-04 14:51:25,723 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1761229237] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:51:25,723 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:51:25,724 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-04 14:51:25,724 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1590627664] [2024-06-04 14:51:25,724 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:51:25,724 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-04 14:51:25,724 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:51:25,724 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-04 14:51:25,724 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2024-06-04 14:51:25,899 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-04 14:51:25,900 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 301 places, 858 transitions, 16313 flow. Second operand has 11 states, 11 states have (on average 11.363636363636363) internal successors, (125), 11 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) [2024-06-04 14:51:25,900 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:51:25,900 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-04 14:51:25,900 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:51:28,219 INFO L124 PetriNetUnfolderBase]: 5207/7959 cut-off events. [2024-06-04 14:51:28,219 INFO L125 PetriNetUnfolderBase]: For 505151/505196 co-relation queries the response was YES. [2024-06-04 14:51:28,288 INFO L83 FinitePrefix]: Finished finitePrefix Result has 75683 conditions, 7959 events. 5207/7959 cut-off events. For 505151/505196 co-relation queries the response was YES. Maximal size of possible extension queue 473. Compared 46866 event pairs, 972 based on Foata normal form. 16/7942 useless extension candidates. Maximal degree in co-relation 75556. Up to 5601 conditions per place. [2024-06-04 14:51:28,328 INFO L140 encePairwiseOnDemand]: 28/44 looper letters, 445 selfloop transitions, 464 changer transitions 0/929 dead transitions. [2024-06-04 14:51:28,328 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 311 places, 929 transitions, 18878 flow [2024-06-04 14:51:28,329 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-04 14:51:28,329 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-04 14:51:28,329 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 225 transitions. [2024-06-04 14:51:28,330 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46487603305785125 [2024-06-04 14:51:28,330 INFO L175 Difference]: Start difference. First operand has 301 places, 858 transitions, 16313 flow. Second operand 11 states and 225 transitions. [2024-06-04 14:51:28,330 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 311 places, 929 transitions, 18878 flow [2024-06-04 14:51:29,764 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 302 places, 929 transitions, 17863 flow, removed 35 selfloop flow, removed 9 redundant places. [2024-06-04 14:51:29,779 INFO L231 Difference]: Finished difference. Result has 303 places, 864 transitions, 16361 flow [2024-06-04 14:51:29,780 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=15298, PETRI_DIFFERENCE_MINUEND_PLACES=292, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=858, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=458, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=394, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=16361, PETRI_PLACES=303, PETRI_TRANSITIONS=864} [2024-06-04 14:51:29,780 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 258 predicate places. [2024-06-04 14:51:29,780 INFO L495 AbstractCegarLoop]: Abstraction has has 303 places, 864 transitions, 16361 flow [2024-06-04 14:51:29,780 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.363636363636363) internal successors, (125), 11 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) [2024-06-04 14:51:29,780 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:51:29,781 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:51:29,781 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60 [2024-06-04 14:51:29,781 INFO L420 AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 14:51:29,781 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:51:29,781 INFO L85 PathProgramCache]: Analyzing trace with hash 1722822279, now seen corresponding path program 2 times [2024-06-04 14:51:29,781 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:51:29,781 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1438135580] [2024-06-04 14:51:29,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:51:29,781 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:51:29,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:51:31,095 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:51:31,096 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:51:31,096 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1438135580] [2024-06-04 14:51:31,096 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1438135580] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:51:31,096 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:51:31,096 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 14:51:31,096 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1961979927] [2024-06-04 14:51:31,096 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:51:31,096 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 14:51:31,096 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:51:31,097 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 14:51:31,097 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2024-06-04 14:51:31,233 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 44 [2024-06-04 14:51:31,233 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 303 places, 864 transitions, 16361 flow. Second operand has 10 states, 10 states have (on average 10.5) internal successors, (105), 10 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:51:31,233 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:51:31,234 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 44 [2024-06-04 14:51:31,234 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:51:33,545 INFO L124 PetriNetUnfolderBase]: 6221/9236 cut-off events. [2024-06-04 14:51:33,545 INFO L125 PetriNetUnfolderBase]: For 592879/592908 co-relation queries the response was YES. [2024-06-04 14:51:33,625 INFO L83 FinitePrefix]: Finished finitePrefix Result has 87209 conditions, 9236 events. 6221/9236 cut-off events. For 592879/592908 co-relation queries the response was YES. Maximal size of possible extension queue 490. Compared 52082 event pairs, 1531 based on Foata normal form. 10/9202 useless extension candidates. Maximal degree in co-relation 87081. Up to 8283 conditions per place. [2024-06-04 14:51:33,672 INFO L140 encePairwiseOnDemand]: 30/44 looper letters, 682 selfloop transitions, 234 changer transitions 0/928 dead transitions. [2024-06-04 14:51:33,672 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 312 places, 928 transitions, 18876 flow [2024-06-04 14:51:33,673 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-04 14:51:33,673 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-04 14:51:33,673 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 193 transitions. [2024-06-04 14:51:33,674 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43863636363636366 [2024-06-04 14:51:33,674 INFO L175 Difference]: Start difference. First operand has 303 places, 864 transitions, 16361 flow. Second operand 10 states and 193 transitions. [2024-06-04 14:51:33,674 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 312 places, 928 transitions, 18876 flow [2024-06-04 14:51:35,372 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 303 places, 928 transitions, 17867 flow, removed 41 selfloop flow, removed 9 redundant places. [2024-06-04 14:51:35,385 INFO L231 Difference]: Finished difference. Result has 306 places, 886 transitions, 16317 flow [2024-06-04 14:51:35,385 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=15364, PETRI_DIFFERENCE_MINUEND_PLACES=294, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=864, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=212, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=645, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=16317, PETRI_PLACES=306, PETRI_TRANSITIONS=886} [2024-06-04 14:51:35,386 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 261 predicate places. [2024-06-04 14:51:35,386 INFO L495 AbstractCegarLoop]: Abstraction has has 306 places, 886 transitions, 16317 flow [2024-06-04 14:51:35,386 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.5) internal successors, (105), 10 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:51:35,386 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:51:35,386 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:51:35,386 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61 [2024-06-04 14:51:35,386 INFO L420 AbstractCegarLoop]: === Iteration 63 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 14:51:35,387 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:51:35,387 INFO L85 PathProgramCache]: Analyzing trace with hash -1206533888, now seen corresponding path program 10 times [2024-06-04 14:51:35,387 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:51:35,387 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [77559997] [2024-06-04 14:51:35,387 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:51:35,387 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:51:35,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:51:36,790 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:51:36,791 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:51:36,791 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [77559997] [2024-06-04 14:51:36,791 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [77559997] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:51:36,791 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:51:36,791 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-04 14:51:36,791 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1077908144] [2024-06-04 14:51:36,791 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:51:36,791 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-04 14:51:36,791 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:51:36,792 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-04 14:51:36,792 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2024-06-04 14:51:36,997 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-04 14:51:36,997 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 306 places, 886 transitions, 16317 flow. Second operand has 11 states, 11 states have (on average 11.363636363636363) internal successors, (125), 11 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) [2024-06-04 14:51:36,997 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:51:36,997 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-04 14:51:36,997 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:51:39,679 INFO L124 PetriNetUnfolderBase]: 5283/8075 cut-off events. [2024-06-04 14:51:39,679 INFO L125 PetriNetUnfolderBase]: For 537689/537725 co-relation queries the response was YES. [2024-06-04 14:51:39,742 INFO L83 FinitePrefix]: Finished finitePrefix Result has 77185 conditions, 8075 events. 5283/8075 cut-off events. For 537689/537725 co-relation queries the response was YES. Maximal size of possible extension queue 482. Compared 47594 event pairs, 901 based on Foata normal form. 5/8054 useless extension candidates. Maximal degree in co-relation 77054. Up to 5728 conditions per place. [2024-06-04 14:51:39,781 INFO L140 encePairwiseOnDemand]: 28/44 looper letters, 459 selfloop transitions, 465 changer transitions 0/946 dead transitions. [2024-06-04 14:51:39,781 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 316 places, 946 transitions, 18792 flow [2024-06-04 14:51:39,782 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-04 14:51:39,782 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-04 14:51:39,782 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 222 transitions. [2024-06-04 14:51:39,782 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45867768595041325 [2024-06-04 14:51:39,782 INFO L175 Difference]: Start difference. First operand has 306 places, 886 transitions, 16317 flow. Second operand 11 states and 222 transitions. [2024-06-04 14:51:39,782 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 316 places, 946 transitions, 18792 flow [2024-06-04 14:51:41,253 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 312 places, 946 transitions, 18435 flow, removed 72 selfloop flow, removed 4 redundant places. [2024-06-04 14:51:41,266 INFO L231 Difference]: Finished difference. Result has 313 places, 889 transitions, 17010 flow [2024-06-04 14:51:41,266 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=15960, PETRI_DIFFERENCE_MINUEND_PLACES=302, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=886, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=462, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=421, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=17010, PETRI_PLACES=313, PETRI_TRANSITIONS=889} [2024-06-04 14:51:41,267 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 268 predicate places. [2024-06-04 14:51:41,267 INFO L495 AbstractCegarLoop]: Abstraction has has 313 places, 889 transitions, 17010 flow [2024-06-04 14:51:41,267 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.363636363636363) internal successors, (125), 11 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) [2024-06-04 14:51:41,267 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:51:41,267 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:51:41,267 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62 [2024-06-04 14:51:41,267 INFO L420 AbstractCegarLoop]: === Iteration 64 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 14:51:41,268 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:51:41,268 INFO L85 PathProgramCache]: Analyzing trace with hash -1027329961, now seen corresponding path program 3 times [2024-06-04 14:51:41,268 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:51:41,268 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1428484745] [2024-06-04 14:51:41,268 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:51:41,268 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:51:41,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:51:42,389 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:51:42,389 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:51:42,389 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1428484745] [2024-06-04 14:51:42,389 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1428484745] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:51:42,390 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:51:42,390 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 14:51:42,390 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1148232924] [2024-06-04 14:51:42,390 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:51:42,390 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 14:51:42,390 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:51:42,392 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 14:51:42,392 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2024-06-04 14:51:42,487 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 44 [2024-06-04 14:51:42,487 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 313 places, 889 transitions, 17010 flow. Second operand has 10 states, 10 states have (on average 10.5) internal successors, (105), 10 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:51:42,487 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:51:42,487 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 44 [2024-06-04 14:51:42,487 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:51:45,002 INFO L124 PetriNetUnfolderBase]: 6328/9397 cut-off events. [2024-06-04 14:51:45,002 INFO L125 PetriNetUnfolderBase]: For 645064/645092 co-relation queries the response was YES. [2024-06-04 14:51:45,092 INFO L83 FinitePrefix]: Finished finitePrefix Result has 90586 conditions, 9397 events. 6328/9397 cut-off events. For 645064/645092 co-relation queries the response was YES. Maximal size of possible extension queue 503. Compared 53154 event pairs, 1510 based on Foata normal form. 10/9363 useless extension candidates. Maximal degree in co-relation 90455. Up to 8421 conditions per place. [2024-06-04 14:51:45,142 INFO L140 encePairwiseOnDemand]: 30/44 looper letters, 704 selfloop transitions, 240 changer transitions 0/956 dead transitions. [2024-06-04 14:51:45,142 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 322 places, 956 transitions, 19774 flow [2024-06-04 14:51:45,143 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-04 14:51:45,143 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-04 14:51:45,143 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 194 transitions. [2024-06-04 14:51:45,144 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4409090909090909 [2024-06-04 14:51:45,144 INFO L175 Difference]: Start difference. First operand has 313 places, 889 transitions, 17010 flow. Second operand 10 states and 194 transitions. [2024-06-04 14:51:45,144 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 322 places, 956 transitions, 19774 flow [2024-06-04 14:51:46,767 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 313 places, 956 transitions, 18718 flow, removed 49 selfloop flow, removed 9 redundant places. [2024-06-04 14:51:46,781 INFO L231 Difference]: Finished difference. Result has 315 places, 910 transitions, 17006 flow [2024-06-04 14:51:46,782 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=15990, PETRI_DIFFERENCE_MINUEND_PLACES=304, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=889, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=219, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=667, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=17006, PETRI_PLACES=315, PETRI_TRANSITIONS=910} [2024-06-04 14:51:46,782 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 270 predicate places. [2024-06-04 14:51:46,782 INFO L495 AbstractCegarLoop]: Abstraction has has 315 places, 910 transitions, 17006 flow [2024-06-04 14:51:46,782 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.5) internal successors, (105), 10 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:51:46,782 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:51:46,783 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:51:46,783 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63 [2024-06-04 14:51:46,783 INFO L420 AbstractCegarLoop]: === Iteration 65 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 14:51:46,783 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:51:46,783 INFO L85 PathProgramCache]: Analyzing trace with hash -1020180121, now seen corresponding path program 4 times [2024-06-04 14:51:46,783 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:51:46,783 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [61557315] [2024-06-04 14:51:46,784 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:51:46,784 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:51:46,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:51:47,964 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:51:47,964 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:51:47,964 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [61557315] [2024-06-04 14:51:47,965 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [61557315] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:51:47,965 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:51:47,965 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 14:51:47,965 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [859929603] [2024-06-04 14:51:47,965 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:51:47,965 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 14:51:47,965 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:51:47,965 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 14:51:47,966 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2024-06-04 14:51:48,077 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 44 [2024-06-04 14:51:48,077 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 315 places, 910 transitions, 17006 flow. Second operand has 10 states, 10 states have (on average 10.5) internal successors, (105), 10 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:51:48,077 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:51:48,077 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 44 [2024-06-04 14:51:48,077 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:51:50,629 INFO L124 PetriNetUnfolderBase]: 6345/9423 cut-off events. [2024-06-04 14:51:50,629 INFO L125 PetriNetUnfolderBase]: For 659792/659820 co-relation queries the response was YES. [2024-06-04 14:51:50,723 INFO L83 FinitePrefix]: Finished finitePrefix Result has 90605 conditions, 9423 events. 6345/9423 cut-off events. For 659792/659820 co-relation queries the response was YES. Maximal size of possible extension queue 505. Compared 53443 event pairs, 1545 based on Foata normal form. 10/9389 useless extension candidates. Maximal degree in co-relation 90472. Up to 8448 conditions per place. [2024-06-04 14:51:50,773 INFO L140 encePairwiseOnDemand]: 30/44 looper letters, 702 selfloop transitions, 248 changer transitions 0/962 dead transitions. [2024-06-04 14:51:50,774 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 324 places, 962 transitions, 19491 flow [2024-06-04 14:51:50,774 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-04 14:51:50,775 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-04 14:51:50,775 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 192 transitions. [2024-06-04 14:51:50,775 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43636363636363634 [2024-06-04 14:51:50,775 INFO L175 Difference]: Start difference. First operand has 315 places, 910 transitions, 17006 flow. Second operand 10 states and 192 transitions. [2024-06-04 14:51:50,776 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 324 places, 962 transitions, 19491 flow [2024-06-04 14:51:52,822 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 318 places, 962 transitions, 19021 flow, removed 41 selfloop flow, removed 6 redundant places. [2024-06-04 14:51:52,837 INFO L231 Difference]: Finished difference. Result has 319 places, 918 transitions, 17293 flow [2024-06-04 14:51:52,837 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=16554, PETRI_DIFFERENCE_MINUEND_PLACES=309, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=910, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=240, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=668, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=17293, PETRI_PLACES=319, PETRI_TRANSITIONS=918} [2024-06-04 14:51:52,838 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 274 predicate places. [2024-06-04 14:51:52,838 INFO L495 AbstractCegarLoop]: Abstraction has has 319 places, 918 transitions, 17293 flow [2024-06-04 14:51:52,838 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.5) internal successors, (105), 10 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:51:52,838 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:51:52,838 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:51:52,838 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64 [2024-06-04 14:51:52,838 INFO L420 AbstractCegarLoop]: === Iteration 66 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 14:51:52,838 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:51:52,838 INFO L85 PathProgramCache]: Analyzing trace with hash -1019911351, now seen corresponding path program 5 times [2024-06-04 14:51:52,839 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:51:52,839 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [455597168] [2024-06-04 14:51:52,839 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:51:52,839 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:51:52,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:51:54,069 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:51:54,069 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:51:54,069 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [455597168] [2024-06-04 14:51:54,069 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [455597168] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:51:54,069 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:51:54,069 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 14:51:54,069 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [403906829] [2024-06-04 14:51:54,070 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:51:54,070 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 14:51:54,070 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:51:54,070 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 14:51:54,070 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-04 14:51:54,225 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 44 [2024-06-04 14:51:54,226 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 319 places, 918 transitions, 17293 flow. Second operand has 10 states, 10 states have (on average 10.5) internal successors, (105), 10 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:51:54,226 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:51:54,226 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 44 [2024-06-04 14:51:54,226 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:51:56,828 INFO L124 PetriNetUnfolderBase]: 6370/9459 cut-off events. [2024-06-04 14:51:56,828 INFO L125 PetriNetUnfolderBase]: For 687130/687158 co-relation queries the response was YES. [2024-06-04 14:51:56,920 INFO L83 FinitePrefix]: Finished finitePrefix Result has 91332 conditions, 9459 events. 6370/9459 cut-off events. For 687130/687158 co-relation queries the response was YES. Maximal size of possible extension queue 506. Compared 53690 event pairs, 1552 based on Foata normal form. 10/9415 useless extension candidates. Maximal degree in co-relation 91199. Up to 8358 conditions per place. [2024-06-04 14:51:56,971 INFO L140 encePairwiseOnDemand]: 30/44 looper letters, 694 selfloop transitions, 256 changer transitions 0/962 dead transitions. [2024-06-04 14:51:56,971 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 328 places, 962 transitions, 19583 flow [2024-06-04 14:51:56,972 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-04 14:51:56,972 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-04 14:51:56,972 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 192 transitions. [2024-06-04 14:51:56,972 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43636363636363634 [2024-06-04 14:51:56,973 INFO L175 Difference]: Start difference. First operand has 319 places, 918 transitions, 17293 flow. Second operand 10 states and 192 transitions. [2024-06-04 14:51:56,973 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 328 places, 962 transitions, 19583 flow [2024-06-04 14:51:58,924 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 322 places, 962 transitions, 19075 flow, removed 36 selfloop flow, removed 6 redundant places. [2024-06-04 14:51:58,938 INFO L231 Difference]: Finished difference. Result has 323 places, 920 transitions, 17388 flow [2024-06-04 14:51:58,939 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=16785, PETRI_DIFFERENCE_MINUEND_PLACES=313, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=918, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=254, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=662, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=17388, PETRI_PLACES=323, PETRI_TRANSITIONS=920} [2024-06-04 14:51:58,939 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 278 predicate places. [2024-06-04 14:51:58,939 INFO L495 AbstractCegarLoop]: Abstraction has has 323 places, 920 transitions, 17388 flow [2024-06-04 14:51:58,939 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.5) internal successors, (105), 10 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:51:58,939 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:51:58,939 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:51:58,939 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65 [2024-06-04 14:51:58,940 INFO L420 AbstractCegarLoop]: === Iteration 67 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 14:51:58,940 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:51:58,940 INFO L85 PathProgramCache]: Analyzing trace with hash -1318125135, now seen corresponding path program 2 times [2024-06-04 14:51:58,940 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:51:58,940 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [758475957] [2024-06-04 14:51:58,940 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:51:58,940 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:51:58,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:51:59,711 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:51:59,711 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:51:59,711 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [758475957] [2024-06-04 14:51:59,712 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [758475957] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:51:59,712 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:51:59,712 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 14:51:59,712 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1067147609] [2024-06-04 14:51:59,712 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:51:59,712 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 14:51:59,712 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:51:59,712 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 14:51:59,712 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2024-06-04 14:51:59,793 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 44 [2024-06-04 14:51:59,793 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 323 places, 920 transitions, 17388 flow. Second operand has 8 states, 8 states have (on average 10.875) internal successors, (87), 8 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:51:59,793 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:51:59,794 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 44 [2024-06-04 14:51:59,794 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:52:02,043 INFO L124 PetriNetUnfolderBase]: 5989/8970 cut-off events. [2024-06-04 14:52:02,043 INFO L125 PetriNetUnfolderBase]: For 663979/664148 co-relation queries the response was YES. [2024-06-04 14:52:02,136 INFO L83 FinitePrefix]: Finished finitePrefix Result has 87174 conditions, 8970 events. 5989/8970 cut-off events. For 663979/664148 co-relation queries the response was YES. Maximal size of possible extension queue 512. Compared 51336 event pairs, 1568 based on Foata normal form. 53/8931 useless extension candidates. Maximal degree in co-relation 87040. Up to 8466 conditions per place. [2024-06-04 14:52:02,185 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 844 selfloop transitions, 52 changer transitions 0/952 dead transitions. [2024-06-04 14:52:02,185 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 330 places, 952 transitions, 19593 flow [2024-06-04 14:52:02,185 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 14:52:02,185 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 14:52:02,186 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 151 transitions. [2024-06-04 14:52:02,186 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4289772727272727 [2024-06-04 14:52:02,186 INFO L175 Difference]: Start difference. First operand has 323 places, 920 transitions, 17388 flow. Second operand 8 states and 151 transitions. [2024-06-04 14:52:02,186 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 330 places, 952 transitions, 19593 flow [2024-06-04 14:52:04,337 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 322 places, 952 transitions, 19008 flow, removed 38 selfloop flow, removed 8 redundant places. [2024-06-04 14:52:04,351 INFO L231 Difference]: Finished difference. Result has 323 places, 929 transitions, 17009 flow [2024-06-04 14:52:04,352 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=16803, PETRI_DIFFERENCE_MINUEND_PLACES=315, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=920, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=877, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=17009, PETRI_PLACES=323, PETRI_TRANSITIONS=929} [2024-06-04 14:52:04,352 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 278 predicate places. [2024-06-04 14:52:04,352 INFO L495 AbstractCegarLoop]: Abstraction has has 323 places, 929 transitions, 17009 flow [2024-06-04 14:52:04,352 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.875) internal successors, (87), 8 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:52:04,352 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:52:04,352 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:52:04,352 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66 [2024-06-04 14:52:04,352 INFO L420 AbstractCegarLoop]: === Iteration 68 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 14:52:04,353 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:52:04,353 INFO L85 PathProgramCache]: Analyzing trace with hash -697028355, now seen corresponding path program 3 times [2024-06-04 14:52:04,353 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:52:04,353 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1067733828] [2024-06-04 14:52:04,353 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:52:04,353 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:52:04,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:52:05,122 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:52:05,122 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:52:05,123 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1067733828] [2024-06-04 14:52:05,123 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1067733828] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:52:05,123 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:52:05,123 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 14:52:05,123 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1634695961] [2024-06-04 14:52:05,123 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:52:05,123 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 14:52:05,123 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:52:05,123 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 14:52:05,123 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2024-06-04 14:52:05,192 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 44 [2024-06-04 14:52:05,192 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 323 places, 929 transitions, 17009 flow. Second operand has 8 states, 8 states have (on average 10.875) internal successors, (87), 8 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:52:05,192 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:52:05,192 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 44 [2024-06-04 14:52:05,192 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:52:07,726 INFO L124 PetriNetUnfolderBase]: 5977/8959 cut-off events. [2024-06-04 14:52:07,726 INFO L125 PetriNetUnfolderBase]: For 673035/673195 co-relation queries the response was YES. [2024-06-04 14:52:07,794 INFO L83 FinitePrefix]: Finished finitePrefix Result has 86475 conditions, 8959 events. 5977/8959 cut-off events. For 673035/673195 co-relation queries the response was YES. Maximal size of possible extension queue 507. Compared 51213 event pairs, 1515 based on Foata normal form. 53/8930 useless extension candidates. Maximal degree in co-relation 86340. Up to 8451 conditions per place. [2024-06-04 14:52:07,838 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 838 selfloop transitions, 54 changer transitions 0/948 dead transitions. [2024-06-04 14:52:07,838 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 330 places, 948 transitions, 18997 flow [2024-06-04 14:52:07,838 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 14:52:07,838 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 14:52:07,838 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 145 transitions. [2024-06-04 14:52:07,839 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4119318181818182 [2024-06-04 14:52:07,839 INFO L175 Difference]: Start difference. First operand has 323 places, 929 transitions, 17009 flow. Second operand 8 states and 145 transitions. [2024-06-04 14:52:07,839 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 330 places, 948 transitions, 18997 flow [2024-06-04 14:52:09,450 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 327 places, 948 transitions, 18904 flow, removed 23 selfloop flow, removed 3 redundant places. [2024-06-04 14:52:09,466 INFO L231 Difference]: Finished difference. Result has 328 places, 929 transitions, 17030 flow [2024-06-04 14:52:09,467 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=16916, PETRI_DIFFERENCE_MINUEND_PLACES=320, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=929, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=54, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=875, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=17030, PETRI_PLACES=328, PETRI_TRANSITIONS=929} [2024-06-04 14:52:09,468 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 283 predicate places. [2024-06-04 14:52:09,468 INFO L495 AbstractCegarLoop]: Abstraction has has 328 places, 929 transitions, 17030 flow [2024-06-04 14:52:09,468 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.875) internal successors, (87), 8 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:52:09,468 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:52:09,468 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:52:09,468 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67 [2024-06-04 14:52:09,469 INFO L420 AbstractCegarLoop]: === Iteration 69 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 14:52:09,469 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:52:09,469 INFO L85 PathProgramCache]: Analyzing trace with hash -727681368, now seen corresponding path program 11 times [2024-06-04 14:52:09,469 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:52:09,469 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [166390605] [2024-06-04 14:52:09,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:52:09,469 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:52:09,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:52:11,059 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:52:11,059 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:52:11,060 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [166390605] [2024-06-04 14:52:11,060 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [166390605] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:52:11,060 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:52:11,060 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-04 14:52:11,060 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1052506868] [2024-06-04 14:52:11,060 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:52:11,060 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-04 14:52:11,060 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:52:11,060 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-04 14:52:11,060 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2024-06-04 14:52:11,263 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-04 14:52:11,268 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 328 places, 929 transitions, 17030 flow. Second operand has 11 states, 11 states have (on average 11.363636363636363) internal successors, (125), 11 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) [2024-06-04 14:52:11,268 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:52:11,269 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-04 14:52:11,269 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:52:13,784 INFO L124 PetriNetUnfolderBase]: 5501/8378 cut-off events. [2024-06-04 14:52:13,785 INFO L125 PetriNetUnfolderBase]: For 689660/689698 co-relation queries the response was YES. [2024-06-04 14:52:13,867 INFO L83 FinitePrefix]: Finished finitePrefix Result has 81963 conditions, 8378 events. 5501/8378 cut-off events. For 689660/689698 co-relation queries the response was YES. Maximal size of possible extension queue 507. Compared 49771 event pairs, 1278 based on Foata normal form. 14/8330 useless extension candidates. Maximal degree in co-relation 81827. Up to 7110 conditions per place. [2024-06-04 14:52:13,915 INFO L140 encePairwiseOnDemand]: 31/44 looper letters, 709 selfloop transitions, 241 changer transitions 0/976 dead transitions. [2024-06-04 14:52:13,915 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 338 places, 976 transitions, 19261 flow [2024-06-04 14:52:13,916 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-04 14:52:13,916 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-04 14:52:13,916 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 217 transitions. [2024-06-04 14:52:13,916 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44834710743801653 [2024-06-04 14:52:13,917 INFO L175 Difference]: Start difference. First operand has 328 places, 929 transitions, 17030 flow. Second operand 11 states and 217 transitions. [2024-06-04 14:52:13,917 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 338 places, 976 transitions, 19261 flow [2024-06-04 14:52:15,801 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 330 places, 976 transitions, 19045 flow, removed 39 selfloop flow, removed 8 redundant places. [2024-06-04 14:52:15,814 INFO L231 Difference]: Finished difference. Result has 331 places, 929 transitions, 17378 flow [2024-06-04 14:52:15,815 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=16814, PETRI_DIFFERENCE_MINUEND_PLACES=320, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=929, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=241, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=688, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=17378, PETRI_PLACES=331, PETRI_TRANSITIONS=929} [2024-06-04 14:52:15,815 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 286 predicate places. [2024-06-04 14:52:15,815 INFO L495 AbstractCegarLoop]: Abstraction has has 331 places, 929 transitions, 17378 flow [2024-06-04 14:52:15,815 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.363636363636363) internal successors, (125), 11 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) [2024-06-04 14:52:15,815 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:52:15,815 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:52:15,815 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68 [2024-06-04 14:52:15,815 INFO L420 AbstractCegarLoop]: === Iteration 70 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 14:52:15,816 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:52:15,816 INFO L85 PathProgramCache]: Analyzing trace with hash -602624453, now seen corresponding path program 1 times [2024-06-04 14:52:15,816 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:52:15,816 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [683499142] [2024-06-04 14:52:15,816 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:52:15,816 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:52:15,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:52:16,791 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:52:16,791 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:52:16,791 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [683499142] [2024-06-04 14:52:16,791 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [683499142] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:52:16,791 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:52:16,791 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 14:52:16,792 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1776253396] [2024-06-04 14:52:16,792 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:52:16,792 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 14:52:16,792 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:52:16,792 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 14:52:16,792 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2024-06-04 14:52:16,890 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 44 [2024-06-04 14:52:16,890 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 331 places, 929 transitions, 17378 flow. Second operand has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:52:16,890 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:52:16,890 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 44 [2024-06-04 14:52:16,890 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:52:19,378 INFO L124 PetriNetUnfolderBase]: 6031/9035 cut-off events. [2024-06-04 14:52:19,379 INFO L125 PetriNetUnfolderBase]: For 715773/715937 co-relation queries the response was YES. [2024-06-04 14:52:19,467 INFO L83 FinitePrefix]: Finished finitePrefix Result has 88401 conditions, 9035 events. 6031/9035 cut-off events. For 715773/715937 co-relation queries the response was YES. Maximal size of possible extension queue 516. Compared 51792 event pairs, 1561 based on Foata normal form. 55/9006 useless extension candidates. Maximal degree in co-relation 88264. Up to 8450 conditions per place. [2024-06-04 14:52:19,515 INFO L140 encePairwiseOnDemand]: 31/44 looper letters, 858 selfloop transitions, 65 changer transitions 0/979 dead transitions. [2024-06-04 14:52:19,515 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 339 places, 979 transitions, 19955 flow [2024-06-04 14:52:19,515 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 14:52:19,515 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 14:52:19,516 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 175 transitions. [2024-06-04 14:52:19,516 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44191919191919193 [2024-06-04 14:52:19,516 INFO L175 Difference]: Start difference. First operand has 331 places, 929 transitions, 17378 flow. Second operand 9 states and 175 transitions. [2024-06-04 14:52:19,516 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 339 places, 979 transitions, 19955 flow [2024-06-04 14:52:21,192 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 330 places, 979 transitions, 19497 flow, removed 27 selfloop flow, removed 9 redundant places. [2024-06-04 14:52:21,205 INFO L231 Difference]: Finished difference. Result has 333 places, 946 transitions, 17372 flow [2024-06-04 14:52:21,205 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=16938, PETRI_DIFFERENCE_MINUEND_PLACES=322, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=929, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=52, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=873, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=17372, PETRI_PLACES=333, PETRI_TRANSITIONS=946} [2024-06-04 14:52:21,206 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 288 predicate places. [2024-06-04 14:52:21,206 INFO L495 AbstractCegarLoop]: Abstraction has has 333 places, 946 transitions, 17372 flow [2024-06-04 14:52:21,206 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:52:21,206 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:52:21,206 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:52:21,206 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable69 [2024-06-04 14:52:21,206 INFO L420 AbstractCegarLoop]: === Iteration 71 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 14:52:21,206 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:52:21,206 INFO L85 PathProgramCache]: Analyzing trace with hash -723872088, now seen corresponding path program 12 times [2024-06-04 14:52:21,207 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:52:21,207 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [446605276] [2024-06-04 14:52:21,207 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:52:21,207 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:52:21,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:52:22,666 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:52:22,666 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:52:22,666 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [446605276] [2024-06-04 14:52:22,666 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [446605276] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:52:22,666 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:52:22,667 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-04 14:52:22,667 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1973598493] [2024-06-04 14:52:22,667 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:52:22,667 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-04 14:52:22,667 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:52:22,667 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-04 14:52:22,667 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2024-06-04 14:52:22,807 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-04 14:52:22,807 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 333 places, 946 transitions, 17372 flow. Second operand has 11 states, 11 states have (on average 11.363636363636363) internal successors, (125), 11 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) [2024-06-04 14:52:22,807 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:52:22,807 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-04 14:52:22,807 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:52:25,084 INFO L124 PetriNetUnfolderBase]: 5576/8483 cut-off events. [2024-06-04 14:52:25,084 INFO L125 PetriNetUnfolderBase]: For 687157/687193 co-relation queries the response was YES. [2024-06-04 14:52:25,163 INFO L83 FinitePrefix]: Finished finitePrefix Result has 84124 conditions, 8483 events. 5576/8483 cut-off events. For 687157/687193 co-relation queries the response was YES. Maximal size of possible extension queue 510. Compared 50514 event pairs, 1070 based on Foata normal form. 20/8443 useless extension candidates. Maximal degree in co-relation 83984. Up to 5675 conditions per place. [2024-06-04 14:52:25,209 INFO L140 encePairwiseOnDemand]: 31/44 looper letters, 343 selfloop transitions, 639 changer transitions 0/1008 dead transitions. [2024-06-04 14:52:25,209 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 342 places, 1008 transitions, 20306 flow [2024-06-04 14:52:25,210 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-04 14:52:25,210 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-04 14:52:25,210 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 207 transitions. [2024-06-04 14:52:25,211 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47045454545454546 [2024-06-04 14:52:25,211 INFO L175 Difference]: Start difference. First operand has 333 places, 946 transitions, 17372 flow. Second operand 10 states and 207 transitions. [2024-06-04 14:52:25,211 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 342 places, 1008 transitions, 20306 flow [2024-06-04 14:52:27,001 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 339 places, 1008 transitions, 20234 flow, removed 26 selfloop flow, removed 3 redundant places. [2024-06-04 14:52:27,015 INFO L231 Difference]: Finished difference. Result has 341 places, 952 transitions, 19120 flow [2024-06-04 14:52:27,015 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=17300, PETRI_DIFFERENCE_MINUEND_PLACES=330, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=946, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=635, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=309, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=19120, PETRI_PLACES=341, PETRI_TRANSITIONS=952} [2024-06-04 14:52:27,015 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 296 predicate places. [2024-06-04 14:52:27,016 INFO L495 AbstractCegarLoop]: Abstraction has has 341 places, 952 transitions, 19120 flow [2024-06-04 14:52:27,016 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.363636363636363) internal successors, (125), 11 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) [2024-06-04 14:52:27,016 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:52:27,016 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:52:27,016 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70 [2024-06-04 14:52:27,016 INFO L420 AbstractCegarLoop]: === Iteration 72 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 14:52:27,017 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:52:27,017 INFO L85 PathProgramCache]: Analyzing trace with hash -509871522, now seen corresponding path program 13 times [2024-06-04 14:52:27,017 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:52:27,017 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [236553401] [2024-06-04 14:52:27,017 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:52:27,017 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:52:27,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:52:28,616 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:52:28,616 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:52:28,616 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [236553401] [2024-06-04 14:52:28,616 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [236553401] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:52:28,616 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:52:28,616 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-04 14:52:28,616 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1145861996] [2024-06-04 14:52:28,616 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:52:28,617 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-04 14:52:28,617 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:52:28,617 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-04 14:52:28,617 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2024-06-04 14:52:28,772 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-04 14:52:28,772 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 341 places, 952 transitions, 19120 flow. Second operand has 11 states, 11 states have (on average 11.363636363636363) internal successors, (125), 11 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) [2024-06-04 14:52:28,772 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:52:28,772 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-04 14:52:28,772 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:52:31,026 INFO L124 PetriNetUnfolderBase]: 5538/8462 cut-off events. [2024-06-04 14:52:31,026 INFO L125 PetriNetUnfolderBase]: For 693600/693623 co-relation queries the response was YES. [2024-06-04 14:52:31,118 INFO L83 FinitePrefix]: Finished finitePrefix Result has 87026 conditions, 8462 events. 5538/8462 cut-off events. For 693600/693623 co-relation queries the response was YES. Maximal size of possible extension queue 513. Compared 50383 event pairs, 1040 based on Foata normal form. 16/8439 useless extension candidates. Maximal degree in co-relation 86883. Up to 5687 conditions per place. [2024-06-04 14:52:31,169 INFO L140 encePairwiseOnDemand]: 30/44 looper letters, 421 selfloop transitions, 576 changer transitions 0/1023 dead transitions. [2024-06-04 14:52:31,169 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 350 places, 1023 transitions, 22085 flow [2024-06-04 14:52:31,170 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-04 14:52:31,170 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-04 14:52:31,170 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 202 transitions. [2024-06-04 14:52:31,170 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4590909090909091 [2024-06-04 14:52:31,170 INFO L175 Difference]: Start difference. First operand has 341 places, 952 transitions, 19120 flow. Second operand 10 states and 202 transitions. [2024-06-04 14:52:31,170 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 350 places, 1023 transitions, 22085 flow [2024-06-04 14:52:33,137 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 344 places, 1023 transitions, 21504 flow, removed 49 selfloop flow, removed 6 redundant places. [2024-06-04 14:52:33,150 INFO L231 Difference]: Finished difference. Result has 345 places, 955 transitions, 19848 flow [2024-06-04 14:52:33,151 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=18539, PETRI_DIFFERENCE_MINUEND_PLACES=335, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=952, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=573, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=376, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=19848, PETRI_PLACES=345, PETRI_TRANSITIONS=955} [2024-06-04 14:52:33,151 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 300 predicate places. [2024-06-04 14:52:33,151 INFO L495 AbstractCegarLoop]: Abstraction has has 345 places, 955 transitions, 19848 flow [2024-06-04 14:52:33,151 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.363636363636363) internal successors, (125), 11 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) [2024-06-04 14:52:33,151 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:52:33,151 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:52:33,152 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71 [2024-06-04 14:52:33,152 INFO L420 AbstractCegarLoop]: === Iteration 73 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 14:52:33,152 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:52:33,152 INFO L85 PathProgramCache]: Analyzing trace with hash -1938632539, now seen corresponding path program 6 times [2024-06-04 14:52:33,152 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:52:33,152 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [285893482] [2024-06-04 14:52:33,152 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:52:33,152 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:52:33,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:52:34,667 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:52:34,669 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:52:34,670 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [285893482] [2024-06-04 14:52:34,670 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [285893482] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:52:34,670 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:52:34,670 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-04 14:52:34,670 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1602904558] [2024-06-04 14:52:34,670 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:52:34,670 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-04 14:52:34,670 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:52:34,670 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-04 14:52:34,671 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2024-06-04 14:52:34,833 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 44 [2024-06-04 14:52:34,833 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 345 places, 955 transitions, 19848 flow. Second operand has 11 states, 11 states have (on average 10.363636363636363) internal successors, (114), 11 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) [2024-06-04 14:52:34,833 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:52:34,833 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 44 [2024-06-04 14:52:34,833 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:52:37,298 INFO L124 PetriNetUnfolderBase]: 6520/9675 cut-off events. [2024-06-04 14:52:37,298 INFO L125 PetriNetUnfolderBase]: For 805017/805052 co-relation queries the response was YES. [2024-06-04 14:52:37,399 INFO L83 FinitePrefix]: Finished finitePrefix Result has 100983 conditions, 9675 events. 6520/9675 cut-off events. For 805017/805052 co-relation queries the response was YES. Maximal size of possible extension queue 522. Compared 55078 event pairs, 1622 based on Foata normal form. 10/9627 useless extension candidates. Maximal degree in co-relation 100838. Up to 8648 conditions per place. [2024-06-04 14:52:37,455 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 715 selfloop transitions, 273 changer transitions 0/1003 dead transitions. [2024-06-04 14:52:37,456 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 353 places, 1003 transitions, 22438 flow [2024-06-04 14:52:37,456 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 14:52:37,456 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 14:52:37,457 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 173 transitions. [2024-06-04 14:52:37,457 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43686868686868685 [2024-06-04 14:52:37,457 INFO L175 Difference]: Start difference. First operand has 345 places, 955 transitions, 19848 flow. Second operand 9 states and 173 transitions. [2024-06-04 14:52:37,457 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 353 places, 1003 transitions, 22438 flow [2024-06-04 14:52:40,248 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 345 places, 1003 transitions, 21203 flow, removed 51 selfloop flow, removed 8 redundant places. [2024-06-04 14:52:40,262 INFO L231 Difference]: Finished difference. Result has 347 places, 962 transitions, 19431 flow [2024-06-04 14:52:40,262 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=18621, PETRI_DIFFERENCE_MINUEND_PLACES=337, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=955, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=266, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=686, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=19431, PETRI_PLACES=347, PETRI_TRANSITIONS=962} [2024-06-04 14:52:40,262 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 302 predicate places. [2024-06-04 14:52:40,262 INFO L495 AbstractCegarLoop]: Abstraction has has 347 places, 962 transitions, 19431 flow [2024-06-04 14:52:40,263 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.363636363636363) internal successors, (114), 11 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) [2024-06-04 14:52:40,263 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:52:40,263 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:52:40,263 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72 [2024-06-04 14:52:40,263 INFO L420 AbstractCegarLoop]: === Iteration 74 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 14:52:40,263 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:52:40,263 INFO L85 PathProgramCache]: Analyzing trace with hash 880382263, now seen corresponding path program 7 times [2024-06-04 14:52:40,263 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:52:40,263 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1473104685] [2024-06-04 14:52:40,263 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:52:40,264 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:52:40,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:52:42,055 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:52:42,055 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:52:42,055 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1473104685] [2024-06-04 14:52:42,055 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1473104685] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:52:42,056 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:52:42,056 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-04 14:52:42,056 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1401981553] [2024-06-04 14:52:42,056 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:52:42,056 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-04 14:52:42,056 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:52:42,056 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-04 14:52:42,056 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2024-06-04 14:52:42,183 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 44 [2024-06-04 14:52:42,183 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 347 places, 962 transitions, 19431 flow. Second operand has 11 states, 11 states have (on average 10.363636363636363) internal successors, (114), 11 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) [2024-06-04 14:52:42,184 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:52:42,184 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 44 [2024-06-04 14:52:42,184 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:52:44,761 INFO L124 PetriNetUnfolderBase]: 6582/9780 cut-off events. [2024-06-04 14:52:44,761 INFO L125 PetriNetUnfolderBase]: For 813944/813972 co-relation queries the response was YES. [2024-06-04 14:52:44,858 INFO L83 FinitePrefix]: Finished finitePrefix Result has 101449 conditions, 9780 events. 6582/9780 cut-off events. For 813944/813972 co-relation queries the response was YES. Maximal size of possible extension queue 531. Compared 55848 event pairs, 1509 based on Foata normal form. 10/9748 useless extension candidates. Maximal degree in co-relation 101302. Up to 8734 conditions per place. [2024-06-04 14:52:44,915 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 742 selfloop transitions, 280 changer transitions 0/1037 dead transitions. [2024-06-04 14:52:44,915 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 355 places, 1037 transitions, 22734 flow [2024-06-04 14:52:44,916 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 14:52:44,916 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 14:52:44,916 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 171 transitions. [2024-06-04 14:52:44,916 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4318181818181818 [2024-06-04 14:52:44,916 INFO L175 Difference]: Start difference. First operand has 347 places, 962 transitions, 19431 flow. Second operand 9 states and 171 transitions. [2024-06-04 14:52:44,916 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 355 places, 1037 transitions, 22734 flow [2024-06-04 14:52:47,929 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 349 places, 1037 transitions, 22068 flow, removed 49 selfloop flow, removed 6 redundant places. [2024-06-04 14:52:47,949 INFO L231 Difference]: Finished difference. Result has 351 places, 989 transitions, 20127 flow [2024-06-04 14:52:47,950 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=18821, PETRI_DIFFERENCE_MINUEND_PLACES=341, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=962, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=253, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=706, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=20127, PETRI_PLACES=351, PETRI_TRANSITIONS=989} [2024-06-04 14:52:47,950 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 306 predicate places. [2024-06-04 14:52:47,950 INFO L495 AbstractCegarLoop]: Abstraction has has 351 places, 989 transitions, 20127 flow [2024-06-04 14:52:47,950 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.363636363636363) internal successors, (114), 11 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) [2024-06-04 14:52:47,950 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:52:47,951 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:52:47,951 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73 [2024-06-04 14:52:47,951 INFO L420 AbstractCegarLoop]: === Iteration 75 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 14:52:47,951 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:52:47,951 INFO L85 PathProgramCache]: Analyzing trace with hash -886413245, now seen corresponding path program 8 times [2024-06-04 14:52:47,951 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:52:47,952 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [276994906] [2024-06-04 14:52:47,952 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:52:47,952 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:52:47,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:52:49,929 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:52:49,929 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:52:49,929 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [276994906] [2024-06-04 14:52:49,929 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [276994906] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:52:49,930 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:52:49,930 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-04 14:52:49,930 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [643647061] [2024-06-04 14:52:49,930 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:52:49,930 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-04 14:52:49,930 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:52:49,930 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-04 14:52:49,930 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2024-06-04 14:52:50,061 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 44 [2024-06-04 14:52:50,062 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 351 places, 989 transitions, 20127 flow. Second operand has 11 states, 11 states have (on average 10.363636363636363) internal successors, (114), 11 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) [2024-06-04 14:52:50,062 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:52:50,062 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 44 [2024-06-04 14:52:50,062 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:52:53,051 INFO L124 PetriNetUnfolderBase]: 6599/9812 cut-off events. [2024-06-04 14:52:53,052 INFO L125 PetriNetUnfolderBase]: For 833946/833974 co-relation queries the response was YES. [2024-06-04 14:52:53,160 INFO L83 FinitePrefix]: Finished finitePrefix Result has 101699 conditions, 9812 events. 6599/9812 cut-off events. For 833946/833974 co-relation queries the response was YES. Maximal size of possible extension queue 536. Compared 56107 event pairs, 1548 based on Foata normal form. 10/9780 useless extension candidates. Maximal degree in co-relation 101550. Up to 8764 conditions per place. [2024-06-04 14:52:53,219 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 749 selfloop transitions, 278 changer transitions 0/1042 dead transitions. [2024-06-04 14:52:53,219 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 359 places, 1042 transitions, 22832 flow [2024-06-04 14:52:53,220 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 14:52:53,220 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 14:52:53,220 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 173 transitions. [2024-06-04 14:52:53,221 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43686868686868685 [2024-06-04 14:52:53,221 INFO L175 Difference]: Start difference. First operand has 351 places, 989 transitions, 20127 flow. Second operand 9 states and 173 transitions. [2024-06-04 14:52:53,221 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 359 places, 1042 transitions, 22832 flow [2024-06-04 14:52:56,847 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 355 places, 1042 transitions, 22397 flow, removed 49 selfloop flow, removed 4 redundant places. [2024-06-04 14:52:56,861 INFO L231 Difference]: Finished difference. Result has 356 places, 991 transitions, 20370 flow [2024-06-04 14:52:56,862 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=19696, PETRI_DIFFERENCE_MINUEND_PLACES=347, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=989, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=276, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=711, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=20370, PETRI_PLACES=356, PETRI_TRANSITIONS=991} [2024-06-04 14:52:56,862 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 311 predicate places. [2024-06-04 14:52:56,862 INFO L495 AbstractCegarLoop]: Abstraction has has 356 places, 991 transitions, 20370 flow [2024-06-04 14:52:56,862 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.363636363636363) internal successors, (114), 11 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) [2024-06-04 14:52:56,862 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:52:56,862 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:52:56,862 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74 [2024-06-04 14:52:56,863 INFO L420 AbstractCegarLoop]: === Iteration 76 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 14:52:56,863 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:52:56,863 INFO L85 PathProgramCache]: Analyzing trace with hash -878994635, now seen corresponding path program 9 times [2024-06-04 14:52:56,863 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:52:56,863 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [801355520] [2024-06-04 14:52:56,863 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:52:56,863 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:52:56,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:52:58,519 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:52:58,519 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:52:58,519 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [801355520] [2024-06-04 14:52:58,519 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [801355520] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:52:58,519 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:52:58,519 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-04 14:52:58,519 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [27754169] [2024-06-04 14:52:58,519 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:52:58,519 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-04 14:52:58,520 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:52:58,520 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-04 14:52:58,520 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2024-06-04 14:52:58,662 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 44 [2024-06-04 14:52:58,663 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 356 places, 991 transitions, 20370 flow. Second operand has 11 states, 11 states have (on average 10.363636363636363) internal successors, (114), 11 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) [2024-06-04 14:52:58,663 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:52:58,663 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 44 [2024-06-04 14:52:58,663 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:53:01,887 INFO L124 PetriNetUnfolderBase]: 6624/9845 cut-off events. [2024-06-04 14:53:01,888 INFO L125 PetriNetUnfolderBase]: For 860397/860425 co-relation queries the response was YES. [2024-06-04 14:53:01,972 INFO L83 FinitePrefix]: Finished finitePrefix Result has 101528 conditions, 9845 events. 6624/9845 cut-off events. For 860397/860425 co-relation queries the response was YES. Maximal size of possible extension queue 535. Compared 56373 event pairs, 1549 based on Foata normal form. 10/9803 useless extension candidates. Maximal degree in co-relation 101378. Up to 8573 conditions per place. [2024-06-04 14:53:02,141 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 730 selfloop transitions, 291 changer transitions 0/1036 dead transitions. [2024-06-04 14:53:02,141 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 364 places, 1036 transitions, 22948 flow [2024-06-04 14:53:02,141 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 14:53:02,142 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 14:53:02,142 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 171 transitions. [2024-06-04 14:53:02,142 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4318181818181818 [2024-06-04 14:53:02,142 INFO L175 Difference]: Start difference. First operand has 356 places, 991 transitions, 20370 flow. Second operand 9 states and 171 transitions. [2024-06-04 14:53:02,142 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 364 places, 1036 transitions, 22948 flow [2024-06-04 14:53:04,959 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 356 places, 1036 transitions, 22262 flow, removed 47 selfloop flow, removed 8 redundant places. [2024-06-04 14:53:04,974 INFO L231 Difference]: Finished difference. Result has 357 places, 993 transitions, 20382 flow [2024-06-04 14:53:04,975 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=19684, PETRI_DIFFERENCE_MINUEND_PLACES=348, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=991, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=289, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=700, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=20382, PETRI_PLACES=357, PETRI_TRANSITIONS=993} [2024-06-04 14:53:04,975 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 312 predicate places. [2024-06-04 14:53:04,975 INFO L495 AbstractCegarLoop]: Abstraction has has 357 places, 993 transitions, 20382 flow [2024-06-04 14:53:04,975 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.363636363636363) internal successors, (114), 11 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) [2024-06-04 14:53:04,975 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:53:04,975 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:53:04,976 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75 [2024-06-04 14:53:04,976 INFO L420 AbstractCegarLoop]: === Iteration 77 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 14:53:04,976 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:53:04,976 INFO L85 PathProgramCache]: Analyzing trace with hash -886628726, now seen corresponding path program 14 times [2024-06-04 14:53:04,976 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:53:04,976 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1806899196] [2024-06-04 14:53:04,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:53:04,976 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:53:04,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:53:06,472 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:53:06,473 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:53:06,473 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1806899196] [2024-06-04 14:53:06,473 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1806899196] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:53:06,473 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:53:06,473 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-04 14:53:06,473 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [380511513] [2024-06-04 14:53:06,473 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:53:06,473 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-04 14:53:06,473 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:53:06,474 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-04 14:53:06,474 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2024-06-04 14:53:06,671 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-04 14:53:06,671 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 357 places, 993 transitions, 20382 flow. Second operand has 11 states, 11 states have (on average 11.363636363636363) internal successors, (125), 11 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) [2024-06-04 14:53:06,671 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:53:06,671 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-04 14:53:06,671 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:53:09,490 INFO L124 PetriNetUnfolderBase]: 5699/8703 cut-off events. [2024-06-04 14:53:09,491 INFO L125 PetriNetUnfolderBase]: For 791157/791157 co-relation queries the response was YES. [2024-06-04 14:53:09,574 INFO L83 FinitePrefix]: Finished finitePrefix Result has 91835 conditions, 8703 events. 5699/8703 cut-off events. For 791157/791157 co-relation queries the response was YES. Maximal size of possible extension queue 530. Compared 51786 event pairs, 885 based on Foata normal form. 6/8689 useless extension candidates. Maximal degree in co-relation 91686. Up to 5830 conditions per place. [2024-06-04 14:53:09,632 INFO L140 encePairwiseOnDemand]: 31/44 looper letters, 449 selfloop transitions, 592 changer transitions 0/1069 dead transitions. [2024-06-04 14:53:09,632 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 366 places, 1069 transitions, 23702 flow [2024-06-04 14:53:09,633 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-04 14:53:09,633 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-04 14:53:09,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 203 transitions. [2024-06-04 14:53:09,634 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46136363636363636 [2024-06-04 14:53:09,634 INFO L175 Difference]: Start difference. First operand has 357 places, 993 transitions, 20382 flow. Second operand 10 states and 203 transitions. [2024-06-04 14:53:09,634 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 366 places, 1069 transitions, 23702 flow [2024-06-04 14:53:11,991 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 359 places, 1069 transitions, 23032 flow, removed 47 selfloop flow, removed 7 redundant places. [2024-06-04 14:53:12,006 INFO L231 Difference]: Finished difference. Result has 360 places, 996 transitions, 21058 flow [2024-06-04 14:53:12,007 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=19712, PETRI_DIFFERENCE_MINUEND_PLACES=350, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=993, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=589, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=401, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=21058, PETRI_PLACES=360, PETRI_TRANSITIONS=996} [2024-06-04 14:53:12,007 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 315 predicate places. [2024-06-04 14:53:12,008 INFO L495 AbstractCegarLoop]: Abstraction has has 360 places, 996 transitions, 21058 flow [2024-06-04 14:53:12,008 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.363636363636363) internal successors, (125), 11 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) [2024-06-04 14:53:12,008 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:53:12,008 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:53:12,008 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76 [2024-06-04 14:53:12,008 INFO L420 AbstractCegarLoop]: === Iteration 78 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 14:53:12,008 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:53:12,008 INFO L85 PathProgramCache]: Analyzing trace with hash -1880970305, now seen corresponding path program 4 times [2024-06-04 14:53:12,008 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:53:12,009 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1796200976] [2024-06-04 14:53:12,009 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:53:12,009 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:53:12,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:53:13,027 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:53:13,027 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:53:13,027 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1796200976] [2024-06-04 14:53:13,027 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1796200976] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:53:13,027 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:53:13,027 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 14:53:13,028 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1434656826] [2024-06-04 14:53:13,028 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:53:13,028 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 14:53:13,028 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:53:13,028 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 14:53:13,028 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-04 14:53:13,106 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 44 [2024-06-04 14:53:13,106 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 360 places, 996 transitions, 21058 flow. Second operand has 8 states, 8 states have (on average 10.875) internal successors, (87), 8 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:53:13,106 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:53:13,106 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 44 [2024-06-04 14:53:13,106 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:53:15,978 INFO L124 PetriNetUnfolderBase]: 6260/9389 cut-off events. [2024-06-04 14:53:15,978 INFO L125 PetriNetUnfolderBase]: For 857912/858089 co-relation queries the response was YES. [2024-06-04 14:53:16,076 INFO L83 FinitePrefix]: Finished finitePrefix Result has 99636 conditions, 9389 events. 6260/9389 cut-off events. For 857912/858089 co-relation queries the response was YES. Maximal size of possible extension queue 538. Compared 54330 event pairs, 1660 based on Foata normal form. 60/9375 useless extension candidates. Maximal degree in co-relation 99486. Up to 8865 conditions per place. [2024-06-04 14:53:16,138 INFO L140 encePairwiseOnDemand]: 35/44 looper letters, 905 selfloop transitions, 58 changer transitions 0/1019 dead transitions. [2024-06-04 14:53:16,138 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 366 places, 1019 transitions, 23273 flow [2024-06-04 14:53:16,138 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 14:53:16,139 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 14:53:16,139 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 132 transitions. [2024-06-04 14:53:16,139 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42857142857142855 [2024-06-04 14:53:16,139 INFO L175 Difference]: Start difference. First operand has 360 places, 996 transitions, 21058 flow. Second operand 7 states and 132 transitions. [2024-06-04 14:53:16,139 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 366 places, 1019 transitions, 23273 flow [2024-06-04 14:53:18,958 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 359 places, 1019 transitions, 22141 flow, removed 61 selfloop flow, removed 7 redundant places. [2024-06-04 14:53:18,972 INFO L231 Difference]: Finished difference. Result has 360 places, 999 transitions, 20109 flow [2024-06-04 14:53:18,973 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=19926, PETRI_DIFFERENCE_MINUEND_PLACES=353, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=996, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=55, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=941, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=20109, PETRI_PLACES=360, PETRI_TRANSITIONS=999} [2024-06-04 14:53:18,973 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 315 predicate places. [2024-06-04 14:53:18,973 INFO L495 AbstractCegarLoop]: Abstraction has has 360 places, 999 transitions, 20109 flow [2024-06-04 14:53:18,973 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.875) internal successors, (87), 8 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:53:18,973 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:53:18,973 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:53:18,973 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77 [2024-06-04 14:53:18,973 INFO L420 AbstractCegarLoop]: === Iteration 79 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 14:53:18,974 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:53:18,974 INFO L85 PathProgramCache]: Analyzing trace with hash -1880612255, now seen corresponding path program 5 times [2024-06-04 14:53:18,974 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:53:18,974 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [682603911] [2024-06-04 14:53:18,974 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:53:18,974 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:53:18,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:53:19,991 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:53:19,991 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:53:19,991 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [682603911] [2024-06-04 14:53:19,991 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [682603911] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:53:19,991 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:53:19,992 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 14:53:19,992 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1019501417] [2024-06-04 14:53:19,992 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:53:19,992 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 14:53:19,992 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:53:19,992 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 14:53:19,992 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-04 14:53:20,068 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 44 [2024-06-04 14:53:20,069 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 360 places, 999 transitions, 20109 flow. Second operand has 8 states, 8 states have (on average 10.875) internal successors, (87), 8 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:53:20,069 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:53:20,069 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 44 [2024-06-04 14:53:20,069 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:53:22,843 INFO L124 PetriNetUnfolderBase]: 6254/9378 cut-off events. [2024-06-04 14:53:22,843 INFO L125 PetriNetUnfolderBase]: For 858996/859151 co-relation queries the response was YES. [2024-06-04 14:53:22,944 INFO L83 FinitePrefix]: Finished finitePrefix Result has 97487 conditions, 9378 events. 6254/9378 cut-off events. For 858996/859151 co-relation queries the response was YES. Maximal size of possible extension queue 538. Compared 54128 event pairs, 1493 based on Foata normal form. 53/9364 useless extension candidates. Maximal degree in co-relation 97336. Up to 8855 conditions per place. [2024-06-04 14:53:22,997 INFO L140 encePairwiseOnDemand]: 35/44 looper letters, 902 selfloop transitions, 59 changer transitions 0/1017 dead transitions. [2024-06-04 14:53:22,997 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 366 places, 1017 transitions, 22292 flow [2024-06-04 14:53:22,998 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 14:53:22,998 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 14:53:22,998 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 127 transitions. [2024-06-04 14:53:22,998 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41233766233766234 [2024-06-04 14:53:22,998 INFO L175 Difference]: Start difference. First operand has 360 places, 999 transitions, 20109 flow. Second operand 7 states and 127 transitions. [2024-06-04 14:53:22,998 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 366 places, 1017 transitions, 22292 flow [2024-06-04 14:53:26,122 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 359 places, 1017 transitions, 22149 flow, removed 17 selfloop flow, removed 7 redundant places. [2024-06-04 14:53:26,137 INFO L231 Difference]: Finished difference. Result has 360 places, 1002 transitions, 20151 flow [2024-06-04 14:53:26,137 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=19973, PETRI_DIFFERENCE_MINUEND_PLACES=353, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=999, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=56, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=943, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=20151, PETRI_PLACES=360, PETRI_TRANSITIONS=1002} [2024-06-04 14:53:26,137 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 315 predicate places. [2024-06-04 14:53:26,138 INFO L495 AbstractCegarLoop]: Abstraction has has 360 places, 1002 transitions, 20151 flow [2024-06-04 14:53:26,138 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.875) internal successors, (87), 8 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:53:26,138 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:53:26,138 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:53:26,138 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78 [2024-06-04 14:53:26,138 INFO L420 AbstractCegarLoop]: === Iteration 80 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 14:53:26,138 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:53:26,138 INFO L85 PathProgramCache]: Analyzing trace with hash 437626775, now seen corresponding path program 10 times [2024-06-04 14:53:26,138 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:53:26,139 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1018841530] [2024-06-04 14:53:26,139 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:53:26,139 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:53:26,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:53:27,405 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:53:27,405 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:53:27,405 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1018841530] [2024-06-04 14:53:27,405 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1018841530] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:53:27,405 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:53:27,405 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-04 14:53:27,405 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [69672213] [2024-06-04 14:53:27,405 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:53:27,405 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-04 14:53:27,405 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:53:27,406 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-04 14:53:27,406 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2024-06-04 14:53:27,611 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 44 [2024-06-04 14:53:27,611 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 360 places, 1002 transitions, 20151 flow. Second operand has 11 states, 11 states have (on average 10.363636363636363) internal successors, (114), 11 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) [2024-06-04 14:53:27,611 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:53:27,611 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 44 [2024-06-04 14:53:27,612 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:53:30,681 INFO L124 PetriNetUnfolderBase]: 6679/9929 cut-off events. [2024-06-04 14:53:30,681 INFO L125 PetriNetUnfolderBase]: For 900844/900858 co-relation queries the response was YES. [2024-06-04 14:53:30,769 INFO L83 FinitePrefix]: Finished finitePrefix Result has 102086 conditions, 9929 events. 6679/9929 cut-off events. For 900844/900858 co-relation queries the response was YES. Maximal size of possible extension queue 538. Compared 56948 event pairs, 2088 based on Foata normal form. 4/9874 useless extension candidates. Maximal degree in co-relation 101936. Up to 9560 conditions per place. [2024-06-04 14:53:30,822 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 996 selfloop transitions, 20 changer transitions 0/1033 dead transitions. [2024-06-04 14:53:30,822 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 368 places, 1033 transitions, 22495 flow [2024-06-04 14:53:30,823 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 14:53:30,823 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 14:53:30,823 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 159 transitions. [2024-06-04 14:53:30,824 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4015151515151515 [2024-06-04 14:53:30,824 INFO L175 Difference]: Start difference. First operand has 360 places, 1002 transitions, 20151 flow. Second operand 9 states and 159 transitions. [2024-06-04 14:53:30,824 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 368 places, 1033 transitions, 22495 flow [2024-06-04 14:53:34,324 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 363 places, 1033 transitions, 22383 flow, removed 14 selfloop flow, removed 5 redundant places. [2024-06-04 14:53:34,338 INFO L231 Difference]: Finished difference. Result has 364 places, 1004 transitions, 20198 flow [2024-06-04 14:53:34,339 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=20039, PETRI_DIFFERENCE_MINUEND_PLACES=355, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1002, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=982, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=20198, PETRI_PLACES=364, PETRI_TRANSITIONS=1004} [2024-06-04 14:53:34,339 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 319 predicate places. [2024-06-04 14:53:34,339 INFO L495 AbstractCegarLoop]: Abstraction has has 364 places, 1004 transitions, 20198 flow [2024-06-04 14:53:34,340 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.363636363636363) internal successors, (114), 11 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) [2024-06-04 14:53:34,340 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:53:34,340 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:53:34,340 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79 [2024-06-04 14:53:34,340 INFO L420 AbstractCegarLoop]: === Iteration 81 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 14:53:34,340 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:53:34,340 INFO L85 PathProgramCache]: Analyzing trace with hash 426584885, now seen corresponding path program 11 times [2024-06-04 14:53:34,340 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:53:34,340 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2089204379] [2024-06-04 14:53:34,340 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:53:34,340 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:53:34,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:53:35,835 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:53:35,835 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:53:35,835 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2089204379] [2024-06-04 14:53:35,835 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2089204379] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:53:35,836 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:53:35,836 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-04 14:53:35,836 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1008779615] [2024-06-04 14:53:35,836 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:53:35,836 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-04 14:53:35,836 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:53:35,836 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-04 14:53:35,836 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2024-06-04 14:53:35,950 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 44 [2024-06-04 14:53:35,951 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 364 places, 1004 transitions, 20198 flow. Second operand has 11 states, 11 states have (on average 10.363636363636363) internal successors, (114), 11 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) [2024-06-04 14:53:35,951 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:53:35,951 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 44 [2024-06-04 14:53:35,951 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:53:39,137 INFO L124 PetriNetUnfolderBase]: 6720/9994 cut-off events. [2024-06-04 14:53:39,137 INFO L125 PetriNetUnfolderBase]: For 919657/919671 co-relation queries the response was YES. [2024-06-04 14:53:39,236 INFO L83 FinitePrefix]: Finished finitePrefix Result has 103373 conditions, 9994 events. 6720/9994 cut-off events. For 919657/919671 co-relation queries the response was YES. Maximal size of possible extension queue 543. Compared 57385 event pairs, 2114 based on Foata normal form. 4/9939 useless extension candidates. Maximal degree in co-relation 103223. Up to 9501 conditions per place. [2024-06-04 14:53:39,291 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 976 selfloop transitions, 54 changer transitions 0/1047 dead transitions. [2024-06-04 14:53:39,291 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 372 places, 1047 transitions, 23059 flow [2024-06-04 14:53:39,292 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 14:53:39,292 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 14:53:39,292 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 164 transitions. [2024-06-04 14:53:39,292 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41414141414141414 [2024-06-04 14:53:39,292 INFO L175 Difference]: Start difference. First operand has 364 places, 1004 transitions, 20198 flow. Second operand 9 states and 164 transitions. [2024-06-04 14:53:39,292 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 372 places, 1047 transitions, 23059 flow [2024-06-04 14:53:42,705 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 365 places, 1047 transitions, 22918 flow, removed 52 selfloop flow, removed 7 redundant places. [2024-06-04 14:53:42,720 INFO L231 Difference]: Finished difference. Result has 366 places, 1008 transitions, 20400 flow [2024-06-04 14:53:42,720 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=20057, PETRI_DIFFERENCE_MINUEND_PLACES=357, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1004, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=52, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=952, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=20400, PETRI_PLACES=366, PETRI_TRANSITIONS=1008} [2024-06-04 14:53:42,721 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 321 predicate places. [2024-06-04 14:53:42,721 INFO L495 AbstractCegarLoop]: Abstraction has has 366 places, 1008 transitions, 20400 flow [2024-06-04 14:53:42,721 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.363636363636363) internal successors, (114), 11 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) [2024-06-04 14:53:42,721 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:53:42,721 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:53:42,721 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80 [2024-06-04 14:53:42,721 INFO L420 AbstractCegarLoop]: === Iteration 82 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 14:53:42,721 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:53:42,721 INFO L85 PathProgramCache]: Analyzing trace with hash -135275723, now seen corresponding path program 12 times [2024-06-04 14:53:42,722 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:53:42,722 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [77380029] [2024-06-04 14:53:42,722 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:53:42,722 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:53:42,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:53:44,149 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:53:44,149 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:53:44,149 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [77380029] [2024-06-04 14:53:44,149 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [77380029] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:53:44,149 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:53:44,149 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 14:53:44,149 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [366183028] [2024-06-04 14:53:44,150 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:53:44,150 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 14:53:44,150 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:53:44,150 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 14:53:44,150 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-04 14:53:44,278 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 44 [2024-06-04 14:53:44,279 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 366 places, 1008 transitions, 20400 flow. Second operand has 10 states, 10 states have (on average 10.5) internal successors, (105), 10 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:53:44,279 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:53:44,279 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 44 [2024-06-04 14:53:44,279 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:53:47,441 INFO L124 PetriNetUnfolderBase]: 6737/10024 cut-off events. [2024-06-04 14:53:47,441 INFO L125 PetriNetUnfolderBase]: For 948233/948247 co-relation queries the response was YES. [2024-06-04 14:53:47,539 INFO L83 FinitePrefix]: Finished finitePrefix Result has 104160 conditions, 10024 events. 6737/10024 cut-off events. For 948233/948247 co-relation queries the response was YES. Maximal size of possible extension queue 547. Compared 57665 event pairs, 2100 based on Foata normal form. 4/9969 useless extension candidates. Maximal degree in co-relation 104009. Up to 9447 conditions per place. [2024-06-04 14:53:47,592 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 963 selfloop transitions, 85 changer transitions 0/1065 dead transitions. [2024-06-04 14:53:47,593 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 374 places, 1065 transitions, 23590 flow [2024-06-04 14:53:47,593 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 14:53:47,593 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 14:53:47,594 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 167 transitions. [2024-06-04 14:53:47,594 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4217171717171717 [2024-06-04 14:53:47,594 INFO L175 Difference]: Start difference. First operand has 366 places, 1008 transitions, 20400 flow. Second operand 9 states and 167 transitions. [2024-06-04 14:53:47,594 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 374 places, 1065 transitions, 23590 flow [2024-06-04 14:53:51,134 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 369 places, 1065 transitions, 23411 flow, removed 63 selfloop flow, removed 5 redundant places. [2024-06-04 14:53:51,151 INFO L231 Difference]: Finished difference. Result has 371 places, 1019 transitions, 20863 flow [2024-06-04 14:53:51,152 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=20221, PETRI_DIFFERENCE_MINUEND_PLACES=361, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1008, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=76, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=931, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=20863, PETRI_PLACES=371, PETRI_TRANSITIONS=1019} [2024-06-04 14:53:51,153 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 326 predicate places. [2024-06-04 14:53:51,153 INFO L495 AbstractCegarLoop]: Abstraction has has 371 places, 1019 transitions, 20863 flow [2024-06-04 14:53:51,153 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.5) internal successors, (105), 10 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:53:51,153 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 14:53:51,153 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 14:53:51,153 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81 [2024-06-04 14:53:51,154 INFO L420 AbstractCegarLoop]: === Iteration 83 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 14:53:51,154 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 14:53:51,154 INFO L85 PathProgramCache]: Analyzing trace with hash -135285023, now seen corresponding path program 13 times [2024-06-04 14:53:51,154 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 14:53:51,154 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1914427005] [2024-06-04 14:53:51,154 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 14:53:51,155 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 14:53:51,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 14:53:52,635 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 14:53:52,635 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 14:53:52,635 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1914427005] [2024-06-04 14:53:52,635 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1914427005] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 14:53:52,635 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 14:53:52,635 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 14:53:52,635 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [769372860] [2024-06-04 14:53:52,636 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 14:53:52,636 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 14:53:52,636 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 14:53:52,636 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 14:53:52,636 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-04 14:53:52,741 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 44 [2024-06-04 14:53:52,741 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 371 places, 1019 transitions, 20863 flow. Second operand has 10 states, 10 states have (on average 10.5) internal successors, (105), 10 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 14:53:52,741 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 14:53:52,741 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 44 [2024-06-04 14:53:52,741 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 14:53:55,939 INFO L124 PetriNetUnfolderBase]: 6811/10134 cut-off events. [2024-06-04 14:53:55,939 INFO L125 PetriNetUnfolderBase]: For 982515/982529 co-relation queries the response was YES. [2024-06-04 14:53:56,054 INFO L83 FinitePrefix]: Finished finitePrefix Result has 106653 conditions, 10134 events. 6811/10134 cut-off events. For 982515/982529 co-relation queries the response was YES. Maximal size of possible extension queue 556. Compared 58384 event pairs, 2105 based on Foata normal form. 4/10079 useless extension candidates. Maximal degree in co-relation 106499. Up to 9580 conditions per place. [2024-06-04 14:53:56,110 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 965 selfloop transitions, 104 changer transitions 0/1086 dead transitions. [2024-06-04 14:53:56,110 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 379 places, 1086 transitions, 24126 flow [2024-06-04 14:53:56,111 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 14:53:56,111 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 14:53:56,111 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 165 transitions. [2024-06-04 14:53:56,111 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4166666666666667 [2024-06-04 14:53:56,111 INFO L175 Difference]: Start difference. First operand has 371 places, 1019 transitions, 20863 flow. Second operand 9 states and 165 transitions. [2024-06-04 14:53:56,111 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 379 places, 1086 transitions, 24126 flow