./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 [2024-06-03 19:20:23,750 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-06-03 19:20:23,782 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-06-03 19:20:23,786 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-06-03 19:20:23,786 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-06-03 19:20:23,799 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-06-03 19:20:23,800 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-06-03 19:20:23,800 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-06-03 19:20:23,801 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-06-03 19:20:23,801 INFO L153 SettingsManager]: * Use memory slicer=true [2024-06-03 19:20:23,801 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-06-03 19:20:23,801 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-06-03 19:20:23,802 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-06-03 19:20:23,802 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-06-03 19:20:23,802 INFO L153 SettingsManager]: * Use SBE=true [2024-06-03 19:20:23,803 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-06-03 19:20:23,803 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-06-03 19:20:23,803 INFO L153 SettingsManager]: * sizeof long=4 [2024-06-03 19:20:23,804 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-06-03 19:20:23,804 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-06-03 19:20:23,804 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-06-03 19:20:23,816 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-06-03 19:20:23,816 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-06-03 19:20:23,817 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-06-03 19:20:23,817 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-06-03 19:20:23,817 INFO L153 SettingsManager]: * sizeof long double=12 [2024-06-03 19:20:23,817 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-06-03 19:20:23,818 INFO L153 SettingsManager]: * Use constant arrays=true [2024-06-03 19:20:23,818 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-06-03 19:20:23,818 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-06-03 19:20:23,818 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-06-03 19:20:23,819 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-06-03 19:20:23,819 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-03 19:20:23,819 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-06-03 19:20:23,819 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-06-03 19:20:23,820 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-06-03 19:20:23,820 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-06-03 19:20:23,820 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-06-03 19:20:23,821 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-06-03 19:20:23,821 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-06-03 19:20:23,821 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-06-03 19:20:23,821 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-06-03 19:20:23,822 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-06-03 19:20:23,822 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check unreachability of reach_error function -> false [2024-06-03 19:20:23,984 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-06-03 19:20:24,002 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-06-03 19:20:24,004 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-06-03 19:20:24,005 INFO L270 PluginConnector]: Initializing CDTParser... [2024-06-03 19:20:24,005 INFO L274 PluginConnector]: CDTParser initialized [2024-06-03 19:20:24,006 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-wmm/mix015.oepc.i [2024-06-03 19:20:25,127 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-06-03 19:20:25,369 INFO L384 CDTParser]: Found 1 translation units. [2024-06-03 19:20:25,370 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/mix015.oepc.i [2024-06-03 19:20:25,385 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d773cc2e2/06454a8650b4433aa4e76ec463153e86/FLAG4fbe83cb7 [2024-06-03 19:20:25,395 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d773cc2e2/06454a8650b4433aa4e76ec463153e86 [2024-06-03 19:20:25,397 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-06-03 19:20:25,398 INFO L274 PluginConnector]: Witness Parser initialized [2024-06-03 19:20:25,398 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/./goblint.2024-05-21_14-57-05.files/protection/mix015.oepc.yml/witness.yml [2024-06-03 19:20:25,552 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-06-03 19:20:25,553 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-06-03 19:20:25,554 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-06-03 19:20:25,554 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-06-03 19:20:25,558 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-06-03 19:20:25,558 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.06 07:20:25" (1/2) ... [2024-06-03 19:20:25,559 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7e6916e1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.06 07:20:25, skipping insertion in model container [2024-06-03 19:20:25,560 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.06 07:20:25" (1/2) ... [2024-06-03 19:20:25,561 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@2a2a5f95 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.06 07:20:25, skipping insertion in model container [2024-06-03 19:20:25,561 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 03.06 07:20:25" (2/2) ... [2024-06-03 19:20:25,562 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7e6916e1 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 03.06 07:20:25, skipping insertion in model container [2024-06-03 19:20:25,562 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 03.06 07:20:25" (2/2) ... [2024-06-03 19:20:25,562 INFO L83 nessWitnessExtractor]: Extracting all invariants from correctness witness [2024-06-03 19:20:25,648 INFO L95 edCorrectnessWitness]: Found the following entries in the witness: [2024-06-03 19:20:25,650 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$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p0_EBX && __unbuffered_p0_EBX <= 1) && (__unbuffered_p0_EBX == 0 || __unbuffered_p0_EBX == 1))) [2024-06-03 19:20:25,650 INFO L97 edCorrectnessWitness]: Location invariant before [L856-L856] (((((((((((((((((((((! multithreaded || a$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))) [2024-06-03 19:20:25,650 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))) [2024-06-03 19:20:25,650 INFO L103 edCorrectnessWitness]: ghost_variable multithreaded = 0 [2024-06-03 19:20:25,650 INFO L106 edCorrectnessWitness]: ghost_update [L851-L851] multithreaded = 1; [2024-06-03 19:20:25,691 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-06-03 19:20:26,021 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-03 19:20:26,038 INFO L202 MainTranslator]: Completed pre-run Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local [2024-06-03 19:20:26,147 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-03 19:20:26,177 INFO L206 MainTranslator]: Completed translation [2024-06-03 19:20:26,177 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 03.06 07:20:26 WrapperNode [2024-06-03 19:20:26,177 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-06-03 19:20:26,178 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-06-03 19:20:26,178 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-06-03 19:20:26,179 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-06-03 19:20:26,184 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 03.06 07:20:26" (1/1) ... [2024-06-03 19:20:26,210 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 03.06 07:20:26" (1/1) ... [2024-06-03 19:20:26,235 INFO L138 Inliner]: procedures = 175, calls = 49, calls flagged for inlining = 6, calls inlined = 7, statements flattened = 135 [2024-06-03 19:20:26,236 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-06-03 19:20:26,236 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-06-03 19:20:26,236 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-06-03 19:20:26,237 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-06-03 19:20:26,245 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 03.06 07:20:26" (1/1) ... [2024-06-03 19:20:26,245 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 03.06 07:20:26" (1/1) ... [2024-06-03 19:20:26,248 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 03.06 07:20:26" (1/1) ... [2024-06-03 19:20:26,261 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]. [2024-06-03 19:20:26,262 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 03.06 07:20:26" (1/1) ... [2024-06-03 19:20:26,262 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 03.06 07:20:26" (1/1) ... [2024-06-03 19:20:26,278 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 03.06 07:20:26" (1/1) ... [2024-06-03 19:20:26,279 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 03.06 07:20:26" (1/1) ... [2024-06-03 19:20:26,281 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 03.06 07:20:26" (1/1) ... [2024-06-03 19:20:26,282 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 03.06 07:20:26" (1/1) ... [2024-06-03 19:20:26,285 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-06-03 19:20:26,285 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-06-03 19:20:26,285 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-06-03 19:20:26,285 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-06-03 19:20:26,286 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 03.06 07:20:26" (1/1) ... [2024-06-03 19:20:26,290 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-03 19:20:26,295 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-03 19:20:26,321 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) [2024-06-03 19:20:26,340 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 [2024-06-03 19:20:26,352 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-06-03 19:20:26,353 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-06-03 19:20:26,353 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2024-06-03 19:20:26,353 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2024-06-03 19:20:26,353 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2024-06-03 19:20:26,353 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2024-06-03 19:20:26,353 INFO L130 BoogieDeclarations]: Found specification of procedure P2 [2024-06-03 19:20:26,354 INFO L138 BoogieDeclarations]: Found implementation of procedure P2 [2024-06-03 19:20:26,354 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-06-03 19:20:26,354 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-06-03 19:20:26,354 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-06-03 19:20:26,354 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-06-03 19:20:26,356 WARN L214 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2024-06-03 19:20:26,479 INFO L244 CfgBuilder]: Building ICFG [2024-06-03 19:20:26,481 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-06-03 19:20:26,797 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-06-03 19:20:26,797 INFO L293 CfgBuilder]: Performing block encoding [2024-06-03 19:20:26,959 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-06-03 19:20:26,959 INFO L320 CfgBuilder]: Removed 0 assume(true) statements. [2024-06-03 19:20:26,960 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.06 07:20:26 BoogieIcfgContainer [2024-06-03 19:20:26,960 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-06-03 19:20:26,962 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-06-03 19:20:26,963 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-06-03 19:20:26,965 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-06-03 19:20:26,965 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.06 07:20:25" (1/4) ... [2024-06-03 19:20:26,966 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@18fed455 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.06 07:20:26, skipping insertion in model container [2024-06-03 19:20:26,966 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 03.06 07:20:25" (2/4) ... [2024-06-03 19:20:26,966 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@18fed455 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 03.06 07:20:26, skipping insertion in model container [2024-06-03 19:20:26,966 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 03.06 07:20:26" (3/4) ... [2024-06-03 19:20:26,967 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@18fed455 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 03.06 07:20:26, skipping insertion in model container [2024-06-03 19:20:26,968 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.06 07:20:26" (4/4) ... [2024-06-03 19:20:26,968 INFO L112 eAbstractionObserver]: Analyzing ICFG mix015.oepc.i [2024-06-03 19:20:26,981 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-06-03 19:20:26,981 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 3 error locations. [2024-06-03 19:20:26,981 INFO L522 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-06-03 19:20:27,019 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-06-03 19:20:27,048 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 54 places, 44 transitions, 100 flow [2024-06-03 19:20:27,077 INFO L124 PetriNetUnfolderBase]: 0/41 cut-off events. [2024-06-03 19:20:27,078 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-03 19:20:27,080 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. [2024-06-03 19:20:27,080 INFO L82 GeneralOperation]: Start removeDead. Operand has 54 places, 44 transitions, 100 flow [2024-06-03 19:20:27,084 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 45 places, 35 transitions, 79 flow [2024-06-03 19:20:27,095 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-06-03 19:20:27,101 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;@378b1869, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-06-03 19:20:27,101 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2024-06-03 19:20:27,106 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-06-03 19:20:27,106 INFO L124 PetriNetUnfolderBase]: 0/7 cut-off events. [2024-06-03 19:20:27,106 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-03 19:20:27,106 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:20:27,107 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2024-06-03 19:20:27,107 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)] === [2024-06-03 19:20:27,161 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:20:27,161 INFO L85 PathProgramCache]: Analyzing trace with hash -1071780369, now seen corresponding path program 1 times [2024-06-03 19:20:27,168 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:20:27,170 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1397181064] [2024-06-03 19:20:27,170 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:20:27,170 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:20:27,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:20:28,456 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:20:28,457 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:20:28,457 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1397181064] [2024-06-03 19:20:28,458 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1397181064] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:20:28,458 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:20:28,458 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-06-03 19:20:28,459 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [811080417] [2024-06-03 19:20:28,460 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:20:28,466 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-06-03 19:20:28,471 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:20:28,495 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-06-03 19:20:28,496 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-06-03 19:20:28,560 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 44 [2024-06-03 19:20:28,564 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) [2024-06-03 19:20:28,565 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:20:28,565 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 44 [2024-06-03 19:20:28,566 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:20:28,949 INFO L124 PetriNetUnfolderBase]: 1363/2134 cut-off events. [2024-06-03 19:20:28,949 INFO L125 PetriNetUnfolderBase]: For 34/34 co-relation queries the response was YES. [2024-06-03 19:20:28,955 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. [2024-06-03 19:20:28,963 INFO L140 encePairwiseOnDemand]: 37/44 looper letters, 34 selfloop transitions, 4 changer transitions 0/45 dead transitions. [2024-06-03 19:20:28,963 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 47 places, 45 transitions, 181 flow [2024-06-03 19:20:28,964 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-06-03 19:20:28,966 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-06-03 19:20:28,971 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 80 transitions. [2024-06-03 19:20:28,972 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6060606060606061 [2024-06-03 19:20:28,973 INFO L175 Difference]: Start difference. First operand has 45 places, 35 transitions, 79 flow. Second operand 3 states and 80 transitions. [2024-06-03 19:20:28,974 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 47 places, 45 transitions, 181 flow [2024-06-03 19:20:28,975 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 44 places, 45 transitions, 176 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-06-03 19:20:28,977 INFO L231 Difference]: Finished difference. Result has 45 places, 38 transitions, 106 flow [2024-06-03 19:20:28,979 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} [2024-06-03 19:20:28,981 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 0 predicate places. [2024-06-03 19:20:28,981 INFO L495 AbstractCegarLoop]: Abstraction has has 45 places, 38 transitions, 106 flow [2024-06-03 19:20:28,982 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) [2024-06-03 19:20:28,982 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:20:28,982 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:20:28,982 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-06-03 19:20:28,982 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)] === [2024-06-03 19:20:28,983 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:20:28,983 INFO L85 PathProgramCache]: Analyzing trace with hash 811259214, now seen corresponding path program 1 times [2024-06-03 19:20:28,983 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:20:28,983 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [532156095] [2024-06-03 19:20:28,983 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:20:28,984 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:20:29,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:20:29,868 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:20:29,868 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:20:29,868 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [532156095] [2024-06-03 19:20:29,869 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [532156095] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:20:29,869 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:20:29,869 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-06-03 19:20:29,869 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1783611735] [2024-06-03 19:20:29,869 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:20:29,871 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-03 19:20:29,871 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:20:29,872 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-03 19:20:29,872 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-06-03 19:20:29,951 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 44 [2024-06-03 19:20:29,952 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) [2024-06-03 19:20:29,952 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:20:29,952 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 44 [2024-06-03 19:20:29,952 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:20:30,229 INFO L124 PetriNetUnfolderBase]: 1357/2125 cut-off events. [2024-06-03 19:20:30,230 INFO L125 PetriNetUnfolderBase]: For 402/402 co-relation queries the response was YES. [2024-06-03 19:20:30,231 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. [2024-06-03 19:20:30,237 INFO L140 encePairwiseOnDemand]: 36/44 looper letters, 41 selfloop transitions, 7 changer transitions 0/55 dead transitions. [2024-06-03 19:20:30,237 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 48 places, 55 transitions, 248 flow [2024-06-03 19:20:30,238 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-03 19:20:30,238 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-03 19:20:30,239 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 103 transitions. [2024-06-03 19:20:30,239 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5852272727272727 [2024-06-03 19:20:30,239 INFO L175 Difference]: Start difference. First operand has 45 places, 38 transitions, 106 flow. Second operand 4 states and 103 transitions. [2024-06-03 19:20:30,239 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 48 places, 55 transitions, 248 flow [2024-06-03 19:20:30,240 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 47 places, 55 transitions, 244 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-06-03 19:20:30,241 INFO L231 Difference]: Finished difference. Result has 48 places, 41 transitions, 142 flow [2024-06-03 19:20:30,241 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} [2024-06-03 19:20:30,242 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 3 predicate places. [2024-06-03 19:20:30,242 INFO L495 AbstractCegarLoop]: Abstraction has has 48 places, 41 transitions, 142 flow [2024-06-03 19:20:30,242 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) [2024-06-03 19:20:30,242 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:20:30,242 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:20:30,242 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-06-03 19:20:30,243 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)] === [2024-06-03 19:20:30,243 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:20:30,243 INFO L85 PathProgramCache]: Analyzing trace with hash -620766744, now seen corresponding path program 1 times [2024-06-03 19:20:30,243 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:20:30,243 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [420596630] [2024-06-03 19:20:30,244 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:20:30,244 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:20:30,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:20:31,260 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:20:31,261 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:20:31,261 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [420596630] [2024-06-03 19:20:31,261 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [420596630] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:20:31,261 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:20:31,262 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-03 19:20:31,262 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [386999227] [2024-06-03 19:20:31,262 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:20:31,263 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-03 19:20:31,263 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:20:31,263 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-03 19:20:31,264 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-06-03 19:20:31,327 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 44 [2024-06-03 19:20:31,328 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) [2024-06-03 19:20:31,328 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:20:31,328 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 44 [2024-06-03 19:20:31,328 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:20:31,653 INFO L124 PetriNetUnfolderBase]: 1598/2490 cut-off events. [2024-06-03 19:20:31,653 INFO L125 PetriNetUnfolderBase]: For 1293/1293 co-relation queries the response was YES. [2024-06-03 19:20:31,655 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. [2024-06-03 19:20:31,664 INFO L140 encePairwiseOnDemand]: 35/44 looper letters, 49 selfloop transitions, 10 changer transitions 0/65 dead transitions. [2024-06-03 19:20:31,664 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 52 places, 65 transitions, 328 flow [2024-06-03 19:20:31,665 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-03 19:20:31,665 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-03 19:20:31,665 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 122 transitions. [2024-06-03 19:20:31,666 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5545454545454546 [2024-06-03 19:20:31,666 INFO L175 Difference]: Start difference. First operand has 48 places, 41 transitions, 142 flow. Second operand 5 states and 122 transitions. [2024-06-03 19:20:31,666 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 52 places, 65 transitions, 328 flow [2024-06-03 19:20:31,667 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 50 places, 65 transitions, 314 flow, removed 2 selfloop flow, removed 2 redundant places. [2024-06-03 19:20:31,668 INFO L231 Difference]: Finished difference. Result has 51 places, 44 transitions, 178 flow [2024-06-03 19:20:31,668 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} [2024-06-03 19:20:31,669 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 6 predicate places. [2024-06-03 19:20:31,669 INFO L495 AbstractCegarLoop]: Abstraction has has 51 places, 44 transitions, 178 flow [2024-06-03 19:20:31,670 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) [2024-06-03 19:20:31,670 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:20:31,670 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:20:31,670 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-06-03 19:20:31,670 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)] === [2024-06-03 19:20:31,670 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:20:31,671 INFO L85 PathProgramCache]: Analyzing trace with hash -2063898451, now seen corresponding path program 1 times [2024-06-03 19:20:31,671 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:20:31,671 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [120905497] [2024-06-03 19:20:31,671 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:20:31,671 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:20:31,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:20:32,807 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:20:32,807 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:20:32,807 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [120905497] [2024-06-03 19:20:32,808 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [120905497] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:20:32,808 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:20:32,808 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-03 19:20:32,808 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1555634014] [2024-06-03 19:20:32,808 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:20:32,808 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-03 19:20:32,808 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:20:32,809 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-03 19:20:32,809 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-03 19:20:32,900 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 44 [2024-06-03 19:20:32,900 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) [2024-06-03 19:20:32,901 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:20:32,901 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 44 [2024-06-03 19:20:32,901 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:20:33,234 INFO L124 PetriNetUnfolderBase]: 1592/2480 cut-off events. [2024-06-03 19:20:33,235 INFO L125 PetriNetUnfolderBase]: For 2422/2422 co-relation queries the response was YES. [2024-06-03 19:20:33,238 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. [2024-06-03 19:20:33,246 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 56 selfloop transitions, 13 changer transitions 0/75 dead transitions. [2024-06-03 19:20:33,246 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 56 places, 75 transitions, 406 flow [2024-06-03 19:20:33,247 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-03 19:20:33,247 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-03 19:20:33,249 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 144 transitions. [2024-06-03 19:20:33,250 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5454545454545454 [2024-06-03 19:20:33,250 INFO L175 Difference]: Start difference. First operand has 51 places, 44 transitions, 178 flow. Second operand 6 states and 144 transitions. [2024-06-03 19:20:33,250 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 56 places, 75 transitions, 406 flow [2024-06-03 19:20:33,253 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 53 places, 75 transitions, 382 flow, removed 4 selfloop flow, removed 3 redundant places. [2024-06-03 19:20:33,254 INFO L231 Difference]: Finished difference. Result has 54 places, 47 transitions, 214 flow [2024-06-03 19:20:33,255 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} [2024-06-03 19:20:33,256 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 9 predicate places. [2024-06-03 19:20:33,256 INFO L495 AbstractCegarLoop]: Abstraction has has 54 places, 47 transitions, 214 flow [2024-06-03 19:20:33,256 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) [2024-06-03 19:20:33,256 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:20:33,256 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:20:33,257 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-06-03 19:20:33,257 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)] === [2024-06-03 19:20:33,257 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:20:33,257 INFO L85 PathProgramCache]: Analyzing trace with hash -421973203, now seen corresponding path program 1 times [2024-06-03 19:20:33,257 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:20:33,257 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [823864647] [2024-06-03 19:20:33,258 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:20:33,258 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:20:33,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:20:33,912 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:20:33,912 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:20:33,912 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [823864647] [2024-06-03 19:20:33,913 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [823864647] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:20:33,913 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:20:33,913 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-03 19:20:33,913 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1537415648] [2024-06-03 19:20:33,913 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:20:33,914 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-03 19:20:33,914 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:20:33,915 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-03 19:20:33,915 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-06-03 19:20:33,999 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-03 19:20:34,000 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) [2024-06-03 19:20:34,000 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:20:34,001 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-03 19:20:34,001 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:20:34,525 INFO L124 PetriNetUnfolderBase]: 1740/2795 cut-off events. [2024-06-03 19:20:34,525 INFO L125 PetriNetUnfolderBase]: For 4262/4262 co-relation queries the response was YES. [2024-06-03 19:20:34,528 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. [2024-06-03 19:20:34,537 INFO L140 encePairwiseOnDemand]: 36/44 looper letters, 47 selfloop transitions, 8 changer transitions 0/62 dead transitions. [2024-06-03 19:20:34,537 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 58 places, 62 transitions, 370 flow [2024-06-03 19:20:34,537 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-03 19:20:34,537 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-03 19:20:34,538 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 104 transitions. [2024-06-03 19:20:34,538 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4727272727272727 [2024-06-03 19:20:34,538 INFO L175 Difference]: Start difference. First operand has 54 places, 47 transitions, 214 flow. Second operand 5 states and 104 transitions. [2024-06-03 19:20:34,538 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 58 places, 62 transitions, 370 flow [2024-06-03 19:20:34,540 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 54 places, 62 transitions, 336 flow, removed 6 selfloop flow, removed 4 redundant places. [2024-06-03 19:20:34,541 INFO L231 Difference]: Finished difference. Result has 55 places, 50 transitions, 226 flow [2024-06-03 19:20:34,541 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} [2024-06-03 19:20:34,541 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 10 predicate places. [2024-06-03 19:20:34,541 INFO L495 AbstractCegarLoop]: Abstraction has has 55 places, 50 transitions, 226 flow [2024-06-03 19:20:34,542 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) [2024-06-03 19:20:34,542 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:20:34,542 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:20:34,542 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-06-03 19:20:34,542 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)] === [2024-06-03 19:20:34,542 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:20:34,543 INFO L85 PathProgramCache]: Analyzing trace with hash -23648614, now seen corresponding path program 1 times [2024-06-03 19:20:34,543 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:20:34,543 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1782318423] [2024-06-03 19:20:34,543 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:20:34,543 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:20:34,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:20:36,420 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:20:36,420 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:20:36,420 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1782318423] [2024-06-03 19:20:36,421 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1782318423] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:20:36,421 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:20:36,421 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 19:20:36,421 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1909112463] [2024-06-03 19:20:36,421 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:20:36,422 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 19:20:36,422 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:20:36,422 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 19:20:36,422 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-03 19:20:36,572 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-03 19:20:36,573 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) [2024-06-03 19:20:36,574 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:20:36,574 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-03 19:20:36,574 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:20:37,148 INFO L124 PetriNetUnfolderBase]: 1817/2859 cut-off events. [2024-06-03 19:20:37,148 INFO L125 PetriNetUnfolderBase]: For 5804/5804 co-relation queries the response was YES. [2024-06-03 19:20:37,152 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. [2024-06-03 19:20:37,170 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 74 selfloop transitions, 19 changer transitions 0/98 dead transitions. [2024-06-03 19:20:37,170 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 62 places, 98 transitions, 554 flow [2024-06-03 19:20:37,171 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 19:20:37,171 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 19:20:37,171 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 181 transitions. [2024-06-03 19:20:37,171 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5142045454545454 [2024-06-03 19:20:37,172 INFO L175 Difference]: Start difference. First operand has 55 places, 50 transitions, 226 flow. Second operand 8 states and 181 transitions. [2024-06-03 19:20:37,172 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 62 places, 98 transitions, 554 flow [2024-06-03 19:20:37,174 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 59 places, 98 transitions, 532 flow, removed 5 selfloop flow, removed 3 redundant places. [2024-06-03 19:20:37,176 INFO L231 Difference]: Finished difference. Result has 61 places, 56 transitions, 298 flow [2024-06-03 19:20:37,176 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} [2024-06-03 19:20:37,178 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 16 predicate places. [2024-06-03 19:20:37,179 INFO L495 AbstractCegarLoop]: Abstraction has has 61 places, 56 transitions, 298 flow [2024-06-03 19:20:37,179 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) [2024-06-03 19:20:37,179 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:20:37,179 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:20:37,179 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-06-03 19:20:37,179 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)] === [2024-06-03 19:20:37,180 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:20:37,180 INFO L85 PathProgramCache]: Analyzing trace with hash -487386576, now seen corresponding path program 1 times [2024-06-03 19:20:37,180 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:20:37,183 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [599973928] [2024-06-03 19:20:37,183 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:20:37,183 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:20:37,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:20:38,098 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:20:38,098 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:20:38,098 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [599973928] [2024-06-03 19:20:38,099 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [599973928] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:20:38,099 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:20:38,099 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-03 19:20:38,099 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1226554161] [2024-06-03 19:20:38,099 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:20:38,099 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-03 19:20:38,100 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:20:38,100 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-03 19:20:38,100 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-03 19:20:38,180 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-03 19:20:38,181 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) [2024-06-03 19:20:38,181 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:20:38,181 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-03 19:20:38,181 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:20:38,641 INFO L124 PetriNetUnfolderBase]: 1772/2824 cut-off events. [2024-06-03 19:20:38,642 INFO L125 PetriNetUnfolderBase]: For 8227/8227 co-relation queries the response was YES. [2024-06-03 19:20:38,646 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. [2024-06-03 19:20:38,656 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 64 selfloop transitions, 16 changer transitions 0/87 dead transitions. [2024-06-03 19:20:38,656 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 66 places, 87 transitions, 590 flow [2024-06-03 19:20:38,656 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-03 19:20:38,657 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-03 19:20:38,657 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 130 transitions. [2024-06-03 19:20:38,657 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49242424242424243 [2024-06-03 19:20:38,657 INFO L175 Difference]: Start difference. First operand has 61 places, 56 transitions, 298 flow. Second operand 6 states and 130 transitions. [2024-06-03 19:20:38,657 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 66 places, 87 transitions, 590 flow [2024-06-03 19:20:38,660 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 61 places, 87 transitions, 540 flow, removed 9 selfloop flow, removed 5 redundant places. [2024-06-03 19:20:38,661 INFO L231 Difference]: Finished difference. Result has 63 places, 65 transitions, 360 flow [2024-06-03 19:20:38,661 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} [2024-06-03 19:20:38,662 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 18 predicate places. [2024-06-03 19:20:38,662 INFO L495 AbstractCegarLoop]: Abstraction has has 63 places, 65 transitions, 360 flow [2024-06-03 19:20:38,662 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) [2024-06-03 19:20:38,662 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:20:38,662 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:20:38,662 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-06-03 19:20:38,663 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)] === [2024-06-03 19:20:38,663 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:20:38,663 INFO L85 PathProgramCache]: Analyzing trace with hash -733105512, now seen corresponding path program 1 times [2024-06-03 19:20:38,663 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:20:38,663 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1287700434] [2024-06-03 19:20:38,663 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:20:38,664 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:20:38,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:20:40,735 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:20:40,736 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:20:40,736 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1287700434] [2024-06-03 19:20:40,736 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1287700434] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:20:40,736 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:20:40,736 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 19:20:40,736 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1586789400] [2024-06-03 19:20:40,736 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:20:40,736 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 19:20:40,737 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:20:40,737 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 19:20:40,737 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-03 19:20:41,011 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-03 19:20:41,012 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) [2024-06-03 19:20:41,012 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:20:41,012 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-03 19:20:41,012 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:20:41,653 INFO L124 PetriNetUnfolderBase]: 1846/2877 cut-off events. [2024-06-03 19:20:41,653 INFO L125 PetriNetUnfolderBase]: For 10861/10861 co-relation queries the response was YES. [2024-06-03 19:20:41,656 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. [2024-06-03 19:20:41,663 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 87 selfloop transitions, 21 changer transitions 0/113 dead transitions. [2024-06-03 19:20:41,663 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 70 places, 113 transitions, 712 flow [2024-06-03 19:20:41,664 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 19:20:41,664 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 19:20:41,665 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 198 transitions. [2024-06-03 19:20:41,665 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5 [2024-06-03 19:20:41,665 INFO L175 Difference]: Start difference. First operand has 63 places, 65 transitions, 360 flow. Second operand 9 states and 198 transitions. [2024-06-03 19:20:41,665 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 70 places, 113 transitions, 712 flow [2024-06-03 19:20:41,669 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 69 places, 113 transitions, 694 flow, removed 8 selfloop flow, removed 1 redundant places. [2024-06-03 19:20:41,670 INFO L231 Difference]: Finished difference. Result has 70 places, 66 transitions, 411 flow [2024-06-03 19:20:41,670 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} [2024-06-03 19:20:41,671 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 25 predicate places. [2024-06-03 19:20:41,671 INFO L495 AbstractCegarLoop]: Abstraction has has 70 places, 66 transitions, 411 flow [2024-06-03 19:20:41,671 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) [2024-06-03 19:20:41,671 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:20:41,671 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:20:41,672 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-06-03 19:20:41,672 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)] === [2024-06-03 19:20:41,672 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:20:41,672 INFO L85 PathProgramCache]: Analyzing trace with hash -487119666, now seen corresponding path program 2 times [2024-06-03 19:20:41,672 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:20:41,672 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1207494413] [2024-06-03 19:20:41,672 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:20:41,673 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:20:41,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:20:42,486 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:20:42,486 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:20:42,487 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1207494413] [2024-06-03 19:20:42,487 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1207494413] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:20:42,487 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:20:42,487 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-03 19:20:42,487 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1849814165] [2024-06-03 19:20:42,487 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:20:42,488 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-03 19:20:42,488 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:20:42,488 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-03 19:20:42,488 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-03 19:20:42,563 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-03 19:20:42,564 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) [2024-06-03 19:20:42,564 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:20:42,564 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-03 19:20:42,564 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:20:43,037 INFO L124 PetriNetUnfolderBase]: 1753/2780 cut-off events. [2024-06-03 19:20:43,037 INFO L125 PetriNetUnfolderBase]: For 13536/13536 co-relation queries the response was YES. [2024-06-03 19:20:43,041 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. [2024-06-03 19:20:43,049 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 64 selfloop transitions, 11 changer transitions 0/82 dead transitions. [2024-06-03 19:20:43,049 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 75 places, 82 transitions, 603 flow [2024-06-03 19:20:43,050 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-03 19:20:43,050 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-03 19:20:43,051 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 121 transitions. [2024-06-03 19:20:43,051 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4583333333333333 [2024-06-03 19:20:43,051 INFO L175 Difference]: Start difference. First operand has 70 places, 66 transitions, 411 flow. Second operand 6 states and 121 transitions. [2024-06-03 19:20:43,051 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 75 places, 82 transitions, 603 flow [2024-06-03 19:20:43,058 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 68 places, 82 transitions, 528 flow, removed 18 selfloop flow, removed 7 redundant places. [2024-06-03 19:20:43,060 INFO L231 Difference]: Finished difference. Result has 69 places, 66 transitions, 366 flow [2024-06-03 19:20:43,060 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} [2024-06-03 19:20:43,061 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 24 predicate places. [2024-06-03 19:20:43,061 INFO L495 AbstractCegarLoop]: Abstraction has has 69 places, 66 transitions, 366 flow [2024-06-03 19:20:43,061 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) [2024-06-03 19:20:43,061 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:20:43,061 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:20:43,062 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-06-03 19:20:43,062 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)] === [2024-06-03 19:20:43,062 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:20:43,062 INFO L85 PathProgramCache]: Analyzing trace with hash 130408690, now seen corresponding path program 1 times [2024-06-03 19:20:43,062 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:20:43,067 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [384908426] [2024-06-03 19:20:43,067 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:20:43,067 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:20:43,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:20:44,150 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:20:44,150 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:20:44,150 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [384908426] [2024-06-03 19:20:44,150 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [384908426] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:20:44,150 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:20:44,150 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 19:20:44,150 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [148787082] [2024-06-03 19:20:44,150 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:20:44,151 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 19:20:44,151 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:20:44,151 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 19:20:44,151 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-03 19:20:44,229 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-03 19:20:44,230 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) [2024-06-03 19:20:44,230 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:20:44,230 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-03 19:20:44,230 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:20:44,733 INFO L124 PetriNetUnfolderBase]: 1874/2907 cut-off events. [2024-06-03 19:20:44,733 INFO L125 PetriNetUnfolderBase]: For 16103/16103 co-relation queries the response was YES. [2024-06-03 19:20:44,737 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. [2024-06-03 19:20:44,745 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 73 selfloop transitions, 24 changer transitions 0/102 dead transitions. [2024-06-03 19:20:44,745 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 75 places, 102 transitions, 732 flow [2024-06-03 19:20:44,746 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 19:20:44,746 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 19:20:44,746 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 146 transitions. [2024-06-03 19:20:44,747 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.474025974025974 [2024-06-03 19:20:44,747 INFO L175 Difference]: Start difference. First operand has 69 places, 66 transitions, 366 flow. Second operand 7 states and 146 transitions. [2024-06-03 19:20:44,747 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 75 places, 102 transitions, 732 flow [2024-06-03 19:20:44,752 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 70 places, 102 transitions, 700 flow, removed 2 selfloop flow, removed 5 redundant places. [2024-06-03 19:20:44,754 INFO L231 Difference]: Finished difference. Result has 71 places, 72 transitions, 452 flow [2024-06-03 19:20:44,755 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} [2024-06-03 19:20:44,755 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 26 predicate places. [2024-06-03 19:20:44,756 INFO L495 AbstractCegarLoop]: Abstraction has has 71 places, 72 transitions, 452 flow [2024-06-03 19:20:44,756 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) [2024-06-03 19:20:44,756 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:20:44,756 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:20:44,756 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-06-03 19:20:44,756 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)] === [2024-06-03 19:20:44,757 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:20:44,757 INFO L85 PathProgramCache]: Analyzing trace with hash 130588180, now seen corresponding path program 2 times [2024-06-03 19:20:44,757 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:20:44,757 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [491960922] [2024-06-03 19:20:44,757 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:20:44,758 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:20:44,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:20:45,791 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:20:45,791 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:20:45,791 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [491960922] [2024-06-03 19:20:45,791 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [491960922] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:20:45,791 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:20:45,791 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 19:20:45,791 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1551321849] [2024-06-03 19:20:45,791 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:20:45,791 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 19:20:45,792 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:20:45,792 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 19:20:45,792 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-03 19:20:45,874 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-03 19:20:45,874 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) [2024-06-03 19:20:45,874 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:20:45,874 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-03 19:20:45,874 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:20:46,271 INFO L124 PetriNetUnfolderBase]: 1896/2939 cut-off events. [2024-06-03 19:20:46,271 INFO L125 PetriNetUnfolderBase]: For 19595/19595 co-relation queries the response was YES. [2024-06-03 19:20:46,275 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. [2024-06-03 19:20:46,285 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 71 selfloop transitions, 26 changer transitions 0/102 dead transitions. [2024-06-03 19:20:46,285 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 77 places, 102 transitions, 792 flow [2024-06-03 19:20:46,285 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 19:20:46,286 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 19:20:46,286 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 144 transitions. [2024-06-03 19:20:46,286 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4675324675324675 [2024-06-03 19:20:46,286 INFO L175 Difference]: Start difference. First operand has 71 places, 72 transitions, 452 flow. Second operand 7 states and 144 transitions. [2024-06-03 19:20:46,286 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 77 places, 102 transitions, 792 flow [2024-06-03 19:20:46,299 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 74 places, 102 transitions, 744 flow, removed 15 selfloop flow, removed 3 redundant places. [2024-06-03 19:20:46,300 INFO L231 Difference]: Finished difference. Result has 75 places, 75 transitions, 498 flow [2024-06-03 19:20:46,300 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} [2024-06-03 19:20:46,301 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 30 predicate places. [2024-06-03 19:20:46,301 INFO L495 AbstractCegarLoop]: Abstraction has has 75 places, 75 transitions, 498 flow [2024-06-03 19:20:46,301 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) [2024-06-03 19:20:46,301 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:20:46,301 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:20:46,301 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-06-03 19:20:46,302 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)] === [2024-06-03 19:20:46,302 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:20:46,302 INFO L85 PathProgramCache]: Analyzing trace with hash -885936270, now seen corresponding path program 3 times [2024-06-03 19:20:46,302 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:20:46,302 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [191843767] [2024-06-03 19:20:46,302 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:20:46,302 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:20:46,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:20:47,156 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:20:47,156 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:20:47,156 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [191843767] [2024-06-03 19:20:47,156 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [191843767] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:20:47,157 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:20:47,157 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 19:20:47,157 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1864213254] [2024-06-03 19:20:47,157 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:20:47,157 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 19:20:47,157 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:20:47,158 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 19:20:47,158 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-03 19:20:47,252 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-03 19:20:47,252 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) [2024-06-03 19:20:47,252 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:20:47,252 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-03 19:20:47,253 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:20:47,706 INFO L124 PetriNetUnfolderBase]: 1886/2928 cut-off events. [2024-06-03 19:20:47,706 INFO L125 PetriNetUnfolderBase]: For 22118/22118 co-relation queries the response was YES. [2024-06-03 19:20:47,711 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. [2024-06-03 19:20:47,720 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 77 selfloop transitions, 14 changer transitions 0/96 dead transitions. [2024-06-03 19:20:47,720 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 81 places, 96 transitions, 736 flow [2024-06-03 19:20:47,720 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 19:20:47,720 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 19:20:47,721 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 134 transitions. [2024-06-03 19:20:47,721 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43506493506493504 [2024-06-03 19:20:47,721 INFO L175 Difference]: Start difference. First operand has 75 places, 75 transitions, 498 flow. Second operand 7 states and 134 transitions. [2024-06-03 19:20:47,721 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 81 places, 96 transitions, 736 flow [2024-06-03 19:20:47,738 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 77 places, 96 transitions, 668 flow, removed 16 selfloop flow, removed 4 redundant places. [2024-06-03 19:20:47,739 INFO L231 Difference]: Finished difference. Result has 78 places, 75 transitions, 466 flow [2024-06-03 19:20:47,739 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} [2024-06-03 19:20:47,739 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 33 predicate places. [2024-06-03 19:20:47,740 INFO L495 AbstractCegarLoop]: Abstraction has has 78 places, 75 transitions, 466 flow [2024-06-03 19:20:47,740 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) [2024-06-03 19:20:47,740 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:20:47,740 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:20:47,740 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-06-03 19:20:47,740 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:20:47,741 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:20:47,741 INFO L85 PathProgramCache]: Analyzing trace with hash 367071370, now seen corresponding path program 1 times [2024-06-03 19:20:47,741 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:20:47,741 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [551137906] [2024-06-03 19:20:47,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:20:47,741 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:20:47,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:20:48,867 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:20:48,868 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:20:48,868 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [551137906] [2024-06-03 19:20:48,868 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [551137906] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:20:48,868 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:20:48,868 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 19:20:48,868 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1543865528] [2024-06-03 19:20:48,868 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:20:48,868 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 19:20:48,868 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:20:48,869 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 19:20:48,869 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-03 19:20:48,968 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-03 19:20:48,969 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) [2024-06-03 19:20:48,969 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:20:48,969 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-03 19:20:48,969 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:20:49,605 INFO L124 PetriNetUnfolderBase]: 2196/3377 cut-off events. [2024-06-03 19:20:49,605 INFO L125 PetriNetUnfolderBase]: For 29051/29051 co-relation queries the response was YES. [2024-06-03 19:20:49,611 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. [2024-06-03 19:20:49,620 INFO L140 encePairwiseOnDemand]: 35/44 looper letters, 76 selfloop transitions, 15 changer transitions 0/100 dead transitions. [2024-06-03 19:20:49,621 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 84 places, 100 transitions, 747 flow [2024-06-03 19:20:49,621 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 19:20:49,621 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 19:20:49,622 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 133 transitions. [2024-06-03 19:20:49,622 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4318181818181818 [2024-06-03 19:20:49,622 INFO L175 Difference]: Start difference. First operand has 78 places, 75 transitions, 466 flow. Second operand 7 states and 133 transitions. [2024-06-03 19:20:49,622 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 84 places, 100 transitions, 747 flow [2024-06-03 19:20:49,634 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 77 places, 100 transitions, 690 flow, removed 2 selfloop flow, removed 7 redundant places. [2024-06-03 19:20:49,635 INFO L231 Difference]: Finished difference. Result has 79 places, 80 transitions, 505 flow [2024-06-03 19:20:49,635 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} [2024-06-03 19:20:49,636 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 34 predicate places. [2024-06-03 19:20:49,637 INFO L495 AbstractCegarLoop]: Abstraction has has 79 places, 80 transitions, 505 flow [2024-06-03 19:20:49,637 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) [2024-06-03 19:20:49,637 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:20:49,637 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:20:49,637 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-06-03 19:20:49,637 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)] === [2024-06-03 19:20:49,638 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:20:49,638 INFO L85 PathProgramCache]: Analyzing trace with hash -592360166, now seen corresponding path program 1 times [2024-06-03 19:20:49,638 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:20:49,638 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [276423855] [2024-06-03 19:20:49,638 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:20:49,638 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:20:49,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:20:50,315 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:20:50,316 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:20:50,316 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [276423855] [2024-06-03 19:20:50,316 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [276423855] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:20:50,316 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:20:50,316 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-03 19:20:50,316 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1980706543] [2024-06-03 19:20:50,316 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:20:50,316 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-03 19:20:50,316 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:20:50,317 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-03 19:20:50,317 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-06-03 19:20:50,379 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-03 19:20:50,379 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) [2024-06-03 19:20:50,380 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:20:50,380 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-03 19:20:50,380 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:20:51,022 INFO L124 PetriNetUnfolderBase]: 2377/3627 cut-off events. [2024-06-03 19:20:51,023 INFO L125 PetriNetUnfolderBase]: For 37859/37859 co-relation queries the response was YES. [2024-06-03 19:20:51,031 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. [2024-06-03 19:20:51,043 INFO L140 encePairwiseOnDemand]: 37/44 looper letters, 73 selfloop transitions, 8 changer transitions 0/91 dead transitions. [2024-06-03 19:20:51,043 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 83 places, 91 transitions, 711 flow [2024-06-03 19:20:51,044 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-03 19:20:51,044 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-03 19:20:51,044 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 94 transitions. [2024-06-03 19:20:51,044 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42727272727272725 [2024-06-03 19:20:51,044 INFO L175 Difference]: Start difference. First operand has 79 places, 80 transitions, 505 flow. Second operand 5 states and 94 transitions. [2024-06-03 19:20:51,045 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 83 places, 91 transitions, 711 flow [2024-06-03 19:20:51,057 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 79 places, 91 transitions, 664 flow, removed 11 selfloop flow, removed 4 redundant places. [2024-06-03 19:20:51,058 INFO L231 Difference]: Finished difference. Result has 80 places, 83 transitions, 510 flow [2024-06-03 19:20:51,058 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} [2024-06-03 19:20:51,059 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 35 predicate places. [2024-06-03 19:20:51,059 INFO L495 AbstractCegarLoop]: Abstraction has has 80 places, 83 transitions, 510 flow [2024-06-03 19:20:51,059 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) [2024-06-03 19:20:51,059 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:20:51,059 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:20:51,059 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-06-03 19:20:51,059 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)] === [2024-06-03 19:20:51,060 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:20:51,060 INFO L85 PathProgramCache]: Analyzing trace with hash -1090863393, now seen corresponding path program 1 times [2024-06-03 19:20:51,060 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:20:51,060 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [769781328] [2024-06-03 19:20:51,060 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:20:51,060 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:20:51,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:20:52,311 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:20:52,311 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:20:52,312 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [769781328] [2024-06-03 19:20:52,312 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [769781328] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:20:52,312 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:20:52,312 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 19:20:52,312 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [497287959] [2024-06-03 19:20:52,312 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:20:52,312 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 19:20:52,312 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:20:52,313 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 19:20:52,313 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-03 19:20:52,428 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-03 19:20:52,429 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) [2024-06-03 19:20:52,429 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:20:52,429 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-03 19:20:52,429 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:20:53,055 INFO L124 PetriNetUnfolderBase]: 2299/3511 cut-off events. [2024-06-03 19:20:53,056 INFO L125 PetriNetUnfolderBase]: For 41532/41538 co-relation queries the response was YES. [2024-06-03 19:20:53,064 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. [2024-06-03 19:20:53,078 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 83 selfloop transitions, 37 changer transitions 0/127 dead transitions. [2024-06-03 19:20:53,078 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 87 places, 127 transitions, 974 flow [2024-06-03 19:20:53,079 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 19:20:53,079 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 19:20:53,079 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 168 transitions. [2024-06-03 19:20:53,079 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4772727272727273 [2024-06-03 19:20:53,080 INFO L175 Difference]: Start difference. First operand has 80 places, 83 transitions, 510 flow. Second operand 8 states and 168 transitions. [2024-06-03 19:20:53,080 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 87 places, 127 transitions, 974 flow [2024-06-03 19:20:53,097 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 84 places, 127 transitions, 944 flow, removed 9 selfloop flow, removed 3 redundant places. [2024-06-03 19:20:53,099 INFO L231 Difference]: Finished difference. Result has 85 places, 89 transitions, 636 flow [2024-06-03 19:20:53,099 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} [2024-06-03 19:20:53,100 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 40 predicate places. [2024-06-03 19:20:53,100 INFO L495 AbstractCegarLoop]: Abstraction has has 85 places, 89 transitions, 636 flow [2024-06-03 19:20:53,100 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) [2024-06-03 19:20:53,100 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:20:53,100 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:20:53,100 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-06-03 19:20:53,101 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)] === [2024-06-03 19:20:53,101 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:20:53,101 INFO L85 PathProgramCache]: Analyzing trace with hash 2032986687, now seen corresponding path program 2 times [2024-06-03 19:20:53,101 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:20:53,101 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [312197883] [2024-06-03 19:20:53,101 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:20:53,101 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:20:53,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:20:54,256 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:20:54,258 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:20:54,258 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [312197883] [2024-06-03 19:20:54,260 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [312197883] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:20:54,260 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:20:54,261 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 19:20:54,261 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [343653735] [2024-06-03 19:20:54,261 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:20:54,261 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 19:20:54,261 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:20:54,262 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 19:20:54,262 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-03 19:20:54,353 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-03 19:20:54,353 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) [2024-06-03 19:20:54,353 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:20:54,353 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-03 19:20:54,353 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:20:54,907 INFO L124 PetriNetUnfolderBase]: 2489/3803 cut-off events. [2024-06-03 19:20:54,908 INFO L125 PetriNetUnfolderBase]: For 52324/52345 co-relation queries the response was YES. [2024-06-03 19:20:54,915 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. [2024-06-03 19:20:54,928 INFO L140 encePairwiseOnDemand]: 31/44 looper letters, 101 selfloop transitions, 40 changer transitions 0/148 dead transitions. [2024-06-03 19:20:54,929 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 93 places, 148 transitions, 1329 flow [2024-06-03 19:20:54,929 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 19:20:54,929 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 19:20:54,930 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 173 transitions. [2024-06-03 19:20:54,930 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43686868686868685 [2024-06-03 19:20:54,930 INFO L175 Difference]: Start difference. First operand has 85 places, 89 transitions, 636 flow. Second operand 9 states and 173 transitions. [2024-06-03 19:20:54,930 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 93 places, 148 transitions, 1329 flow [2024-06-03 19:20:54,961 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 89 places, 148 transitions, 1195 flow, removed 41 selfloop flow, removed 4 redundant places. [2024-06-03 19:20:54,963 INFO L231 Difference]: Finished difference. Result has 94 places, 115 transitions, 919 flow [2024-06-03 19:20:54,963 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} [2024-06-03 19:20:54,964 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 49 predicate places. [2024-06-03 19:20:54,964 INFO L495 AbstractCegarLoop]: Abstraction has has 94 places, 115 transitions, 919 flow [2024-06-03 19:20:54,964 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) [2024-06-03 19:20:54,964 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:20:54,964 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:20:54,964 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-06-03 19:20:54,964 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)] === [2024-06-03 19:20:54,965 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:20:54,965 INFO L85 PathProgramCache]: Analyzing trace with hash 382592059, now seen corresponding path program 3 times [2024-06-03 19:20:54,965 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:20:54,965 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2079682455] [2024-06-03 19:20:54,965 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:20:54,965 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:20:54,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:20:55,735 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:20:55,735 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:20:55,736 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2079682455] [2024-06-03 19:20:55,736 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2079682455] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:20:55,736 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:20:55,736 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 19:20:55,736 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1326449024] [2024-06-03 19:20:55,736 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:20:55,737 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 19:20:55,737 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:20:55,737 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 19:20:55,737 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2024-06-03 19:20:55,855 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-03 19:20:55,855 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) [2024-06-03 19:20:55,855 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:20:55,855 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-03 19:20:55,855 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:20:56,748 INFO L124 PetriNetUnfolderBase]: 2775/4245 cut-off events. [2024-06-03 19:20:56,748 INFO L125 PetriNetUnfolderBase]: For 56566/56580 co-relation queries the response was YES. [2024-06-03 19:20:56,760 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. [2024-06-03 19:20:56,776 INFO L140 encePairwiseOnDemand]: 30/44 looper letters, 134 selfloop transitions, 98 changer transitions 0/239 dead transitions. [2024-06-03 19:20:56,776 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 102 places, 239 transitions, 2411 flow [2024-06-03 19:20:56,777 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 19:20:56,777 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 19:20:56,778 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 186 transitions. [2024-06-03 19:20:56,778 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4696969696969697 [2024-06-03 19:20:56,778 INFO L175 Difference]: Start difference. First operand has 94 places, 115 transitions, 919 flow. Second operand 9 states and 186 transitions. [2024-06-03 19:20:56,779 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 102 places, 239 transitions, 2411 flow [2024-06-03 19:20:56,823 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 101 places, 239 transitions, 2331 flow, removed 39 selfloop flow, removed 1 redundant places. [2024-06-03 19:20:56,827 INFO L231 Difference]: Finished difference. Result has 106 places, 193 transitions, 1989 flow [2024-06-03 19:20:56,827 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} [2024-06-03 19:20:56,827 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 61 predicate places. [2024-06-03 19:20:56,827 INFO L495 AbstractCegarLoop]: Abstraction has has 106 places, 193 transitions, 1989 flow [2024-06-03 19:20:56,827 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) [2024-06-03 19:20:56,828 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:20:56,828 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:20:56,828 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-06-03 19:20:56,828 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)] === [2024-06-03 19:20:56,828 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:20:56,828 INFO L85 PathProgramCache]: Analyzing trace with hash 186438189, now seen corresponding path program 4 times [2024-06-03 19:20:56,828 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:20:56,829 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [711481336] [2024-06-03 19:20:56,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:20:56,829 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:20:56,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:20:57,592 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:20:57,592 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:20:57,593 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [711481336] [2024-06-03 19:20:57,593 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [711481336] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:20:57,593 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:20:57,593 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 19:20:57,593 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1144233580] [2024-06-03 19:20:57,593 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:20:57,593 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 19:20:57,594 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:20:57,595 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 19:20:57,595 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2024-06-03 19:20:57,685 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-03 19:20:57,685 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) [2024-06-03 19:20:57,685 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:20:57,685 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-03 19:20:57,685 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:20:58,656 INFO L124 PetriNetUnfolderBase]: 3078/4705 cut-off events. [2024-06-03 19:20:58,656 INFO L125 PetriNetUnfolderBase]: For 68926/68943 co-relation queries the response was YES. [2024-06-03 19:20:58,667 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. [2024-06-03 19:20:58,684 INFO L140 encePairwiseOnDemand]: 30/44 looper letters, 138 selfloop transitions, 172 changer transitions 0/317 dead transitions. [2024-06-03 19:20:58,684 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 114 places, 317 transitions, 3885 flow [2024-06-03 19:20:58,685 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 19:20:58,685 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 19:20:58,685 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 190 transitions. [2024-06-03 19:20:58,686 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4797979797979798 [2024-06-03 19:20:58,686 INFO L175 Difference]: Start difference. First operand has 106 places, 193 transitions, 1989 flow. Second operand 9 states and 190 transitions. [2024-06-03 19:20:58,686 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 114 places, 317 transitions, 3885 flow [2024-06-03 19:20:58,740 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 112 places, 317 transitions, 3812 flow, removed 31 selfloop flow, removed 2 redundant places. [2024-06-03 19:20:58,744 INFO L231 Difference]: Finished difference. Result has 117 places, 264 transitions, 3397 flow [2024-06-03 19:20:58,744 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} [2024-06-03 19:20:58,745 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 72 predicate places. [2024-06-03 19:20:58,745 INFO L495 AbstractCegarLoop]: Abstraction has has 117 places, 264 transitions, 3397 flow [2024-06-03 19:20:58,745 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) [2024-06-03 19:20:58,745 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:20:58,745 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:20:58,745 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2024-06-03 19:20:58,745 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)] === [2024-06-03 19:20:58,746 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:20:58,746 INFO L85 PathProgramCache]: Analyzing trace with hash 1531703649, now seen corresponding path program 5 times [2024-06-03 19:20:58,746 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:20:58,746 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [211765810] [2024-06-03 19:20:58,746 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:20:58,746 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:20:58,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:20:59,575 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:20:59,575 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:20:59,575 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [211765810] [2024-06-03 19:20:59,575 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [211765810] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:20:59,576 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:20:59,576 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 19:20:59,576 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [368217209] [2024-06-03 19:20:59,576 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:20:59,576 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 19:20:59,577 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:20:59,577 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 19:20:59,577 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2024-06-03 19:20:59,697 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-03 19:20:59,697 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) [2024-06-03 19:20:59,698 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:20:59,698 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-03 19:20:59,698 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:21:00,710 INFO L124 PetriNetUnfolderBase]: 3032/4642 cut-off events. [2024-06-03 19:21:00,711 INFO L125 PetriNetUnfolderBase]: For 75836/75869 co-relation queries the response was YES. [2024-06-03 19:21:00,726 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. [2024-06-03 19:21:00,745 INFO L140 encePairwiseOnDemand]: 30/44 looper letters, 139 selfloop transitions, 182 changer transitions 0/328 dead transitions. [2024-06-03 19:21:00,745 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 125 places, 328 transitions, 4623 flow [2024-06-03 19:21:00,745 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 19:21:00,746 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 19:21:00,746 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 186 transitions. [2024-06-03 19:21:00,746 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4696969696969697 [2024-06-03 19:21:00,746 INFO L175 Difference]: Start difference. First operand has 117 places, 264 transitions, 3397 flow. Second operand 9 states and 186 transitions. [2024-06-03 19:21:00,746 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 125 places, 328 transitions, 4623 flow [2024-06-03 19:21:00,827 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 122 places, 328 transitions, 4397 flow, removed 29 selfloop flow, removed 3 redundant places. [2024-06-03 19:21:00,831 INFO L231 Difference]: Finished difference. Result has 126 places, 279 transitions, 3950 flow [2024-06-03 19:21:00,831 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} [2024-06-03 19:21:00,832 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 81 predicate places. [2024-06-03 19:21:00,832 INFO L495 AbstractCegarLoop]: Abstraction has has 126 places, 279 transitions, 3950 flow [2024-06-03 19:21:00,832 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) [2024-06-03 19:21:00,832 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:21:00,832 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:21:00,832 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2024-06-03 19:21:00,833 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)] === [2024-06-03 19:21:00,833 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:21:00,833 INFO L85 PathProgramCache]: Analyzing trace with hash 2038550877, now seen corresponding path program 6 times [2024-06-03 19:21:00,833 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:21:00,833 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1165660011] [2024-06-03 19:21:00,833 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:21:00,833 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:21:00,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:21:01,940 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:21:01,940 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:21:01,940 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1165660011] [2024-06-03 19:21:01,940 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1165660011] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:21:01,941 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:21:01,941 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 19:21:01,941 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [37013312] [2024-06-03 19:21:01,941 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:21:01,941 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 19:21:01,941 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:21:01,942 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 19:21:01,942 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-03 19:21:02,039 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-03 19:21:02,040 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) [2024-06-03 19:21:02,040 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:21:02,040 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-03 19:21:02,040 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:21:02,835 INFO L124 PetriNetUnfolderBase]: 3163/4833 cut-off events. [2024-06-03 19:21:02,835 INFO L125 PetriNetUnfolderBase]: For 93276/93305 co-relation queries the response was YES. [2024-06-03 19:21:02,851 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. [2024-06-03 19:21:02,873 INFO L140 encePairwiseOnDemand]: 31/44 looper letters, 186 selfloop transitions, 145 changer transitions 0/338 dead transitions. [2024-06-03 19:21:02,874 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 134 places, 338 transitions, 5229 flow [2024-06-03 19:21:02,874 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 19:21:02,874 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 19:21:02,875 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 173 transitions. [2024-06-03 19:21:02,875 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43686868686868685 [2024-06-03 19:21:02,875 INFO L175 Difference]: Start difference. First operand has 126 places, 279 transitions, 3950 flow. Second operand 9 states and 173 transitions. [2024-06-03 19:21:02,875 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 134 places, 338 transitions, 5229 flow [2024-06-03 19:21:02,971 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 130 places, 338 transitions, 4919 flow, removed 46 selfloop flow, removed 4 redundant places. [2024-06-03 19:21:02,975 INFO L231 Difference]: Finished difference. Result has 133 places, 294 transitions, 4328 flow [2024-06-03 19:21:02,976 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} [2024-06-03 19:21:02,976 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 88 predicate places. [2024-06-03 19:21:02,976 INFO L495 AbstractCegarLoop]: Abstraction has has 133 places, 294 transitions, 4328 flow [2024-06-03 19:21:02,976 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) [2024-06-03 19:21:02,976 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:21:02,976 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:21:02,977 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2024-06-03 19:21:02,977 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)] === [2024-06-03 19:21:02,977 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:21:02,977 INFO L85 PathProgramCache]: Analyzing trace with hash -1684688179, now seen corresponding path program 1 times [2024-06-03 19:21:02,977 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:21:02,977 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [977058812] [2024-06-03 19:21:02,977 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:21:02,978 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:21:02,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:21:04,053 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:21:04,053 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:21:04,053 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [977058812] [2024-06-03 19:21:04,053 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [977058812] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:21:04,053 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:21:04,053 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 19:21:04,054 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [749334005] [2024-06-03 19:21:04,054 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:21:04,054 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 19:21:04,054 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:21:04,055 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 19:21:04,055 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2024-06-03 19:21:04,173 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-03 19:21:04,174 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) [2024-06-03 19:21:04,174 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:21:04,174 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-03 19:21:04,174 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:21:05,093 INFO L124 PetriNetUnfolderBase]: 3267/4925 cut-off events. [2024-06-03 19:21:05,093 INFO L125 PetriNetUnfolderBase]: For 109742/109904 co-relation queries the response was YES. [2024-06-03 19:21:05,105 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. [2024-06-03 19:21:05,122 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 284 selfloop transitions, 27 changer transitions 0/328 dead transitions. [2024-06-03 19:21:05,122 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 139 places, 328 transitions, 5250 flow [2024-06-03 19:21:05,123 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 19:21:05,123 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 19:21:05,123 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 134 transitions. [2024-06-03 19:21:05,123 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43506493506493504 [2024-06-03 19:21:05,123 INFO L175 Difference]: Start difference. First operand has 133 places, 294 transitions, 4328 flow. Second operand 7 states and 134 transitions. [2024-06-03 19:21:05,123 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 139 places, 328 transitions, 5250 flow [2024-06-03 19:21:05,221 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 134 places, 328 transitions, 4988 flow, removed 46 selfloop flow, removed 5 redundant places. [2024-06-03 19:21:05,226 INFO L231 Difference]: Finished difference. Result has 135 places, 307 transitions, 4379 flow [2024-06-03 19:21:05,226 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} [2024-06-03 19:21:05,226 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 90 predicate places. [2024-06-03 19:21:05,227 INFO L495 AbstractCegarLoop]: Abstraction has has 135 places, 307 transitions, 4379 flow [2024-06-03 19:21:05,227 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) [2024-06-03 19:21:05,227 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:21:05,227 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:21:05,227 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2024-06-03 19:21:05,227 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)] === [2024-06-03 19:21:05,228 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:21:05,228 INFO L85 PathProgramCache]: Analyzing trace with hash -1515230869, now seen corresponding path program 7 times [2024-06-03 19:21:05,228 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:21:05,228 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1822665737] [2024-06-03 19:21:05,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:21:05,228 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:21:05,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:21:06,171 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:21:06,172 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:21:06,172 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1822665737] [2024-06-03 19:21:06,172 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1822665737] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:21:06,172 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:21:06,172 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 19:21:06,172 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1102818566] [2024-06-03 19:21:06,172 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:21:06,173 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 19:21:06,173 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:21:06,173 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 19:21:06,173 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-03 19:21:06,303 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-03 19:21:06,303 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) [2024-06-03 19:21:06,303 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:21:06,304 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-03 19:21:06,304 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:21:07,154 INFO L124 PetriNetUnfolderBase]: 3164/4832 cut-off events. [2024-06-03 19:21:07,155 INFO L125 PetriNetUnfolderBase]: For 105798/105821 co-relation queries the response was YES. [2024-06-03 19:21:07,172 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. [2024-06-03 19:21:07,192 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 280 selfloop transitions, 53 changer transitions 0/340 dead transitions. [2024-06-03 19:21:07,192 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 142 places, 340 transitions, 5213 flow [2024-06-03 19:21:07,193 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 19:21:07,193 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 19:21:07,194 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 152 transitions. [2024-06-03 19:21:07,194 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4318181818181818 [2024-06-03 19:21:07,194 INFO L175 Difference]: Start difference. First operand has 135 places, 307 transitions, 4379 flow. Second operand 8 states and 152 transitions. [2024-06-03 19:21:07,194 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 142 places, 340 transitions, 5213 flow [2024-06-03 19:21:07,299 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 137 places, 340 transitions, 5078 flow, removed 48 selfloop flow, removed 5 redundant places. [2024-06-03 19:21:07,304 INFO L231 Difference]: Finished difference. Result has 138 places, 307 transitions, 4368 flow [2024-06-03 19:21:07,305 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} [2024-06-03 19:21:07,305 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 93 predicate places. [2024-06-03 19:21:07,305 INFO L495 AbstractCegarLoop]: Abstraction has has 138 places, 307 transitions, 4368 flow [2024-06-03 19:21:07,305 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) [2024-06-03 19:21:07,305 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:21:07,305 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:21:07,306 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2024-06-03 19:21:07,306 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)] === [2024-06-03 19:21:07,306 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:21:07,306 INFO L85 PathProgramCache]: Analyzing trace with hash -1183294850, now seen corresponding path program 1 times [2024-06-03 19:21:07,306 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:21:07,306 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1762190903] [2024-06-03 19:21:07,306 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:21:07,307 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:21:07,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:21:08,111 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:21:08,111 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:21:08,111 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1762190903] [2024-06-03 19:21:08,111 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1762190903] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:21:08,111 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:21:08,112 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-03 19:21:08,112 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1808925830] [2024-06-03 19:21:08,112 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:21:08,113 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-03 19:21:08,113 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:21:08,113 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-03 19:21:08,113 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-03 19:21:08,170 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-03 19:21:08,170 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) [2024-06-03 19:21:08,170 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:21:08,171 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-03 19:21:08,171 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:21:09,057 INFO L124 PetriNetUnfolderBase]: 3146/4823 cut-off events. [2024-06-03 19:21:09,057 INFO L125 PetriNetUnfolderBase]: For 112951/113107 co-relation queries the response was YES. [2024-06-03 19:21:09,076 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. [2024-06-03 19:21:09,095 INFO L140 encePairwiseOnDemand]: 36/44 looper letters, 248 selfloop transitions, 12 changer transitions 0/320 dead transitions. [2024-06-03 19:21:09,095 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 143 places, 320 transitions, 4944 flow [2024-06-03 19:21:09,096 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-03 19:21:09,096 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-03 19:21:09,096 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 110 transitions. [2024-06-03 19:21:09,096 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4166666666666667 [2024-06-03 19:21:09,096 INFO L175 Difference]: Start difference. First operand has 138 places, 307 transitions, 4368 flow. Second operand 6 states and 110 transitions. [2024-06-03 19:21:09,097 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 143 places, 320 transitions, 4944 flow [2024-06-03 19:21:09,231 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 135 places, 320 transitions, 4717 flow, removed 8 selfloop flow, removed 8 redundant places. [2024-06-03 19:21:09,235 INFO L231 Difference]: Finished difference. Result has 136 places, 310 transitions, 4205 flow [2024-06-03 19:21:09,236 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} [2024-06-03 19:21:09,236 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 91 predicate places. [2024-06-03 19:21:09,236 INFO L495 AbstractCegarLoop]: Abstraction has has 136 places, 310 transitions, 4205 flow [2024-06-03 19:21:09,236 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) [2024-06-03 19:21:09,236 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:21:09,236 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:21:09,237 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2024-06-03 19:21:09,237 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)] === [2024-06-03 19:21:09,240 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:21:09,241 INFO L85 PathProgramCache]: Analyzing trace with hash -1325343017, now seen corresponding path program 1 times [2024-06-03 19:21:09,241 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:21:09,241 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1707252464] [2024-06-03 19:21:09,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:21:09,241 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:21:09,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:21:10,180 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:21:10,180 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:21:10,180 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1707252464] [2024-06-03 19:21:10,180 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1707252464] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:21:10,180 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:21:10,180 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 19:21:10,180 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [548510329] [2024-06-03 19:21:10,180 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:21:10,180 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 19:21:10,180 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:21:10,181 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 19:21:10,181 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-03 19:21:10,306 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-03 19:21:10,306 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) [2024-06-03 19:21:10,306 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:21:10,306 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-03 19:21:10,306 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:21:11,349 INFO L124 PetriNetUnfolderBase]: 3233/4957 cut-off events. [2024-06-03 19:21:11,349 INFO L125 PetriNetUnfolderBase]: For 115850/115892 co-relation queries the response was YES. [2024-06-03 19:21:11,369 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. [2024-06-03 19:21:11,391 INFO L140 encePairwiseOnDemand]: 30/44 looper letters, 297 selfloop transitions, 67 changer transitions 0/371 dead transitions. [2024-06-03 19:21:11,391 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 145 places, 371 transitions, 5333 flow [2024-06-03 19:21:11,392 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-03 19:21:11,392 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-03 19:21:11,393 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 197 transitions. [2024-06-03 19:21:11,393 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44772727272727275 [2024-06-03 19:21:11,393 INFO L175 Difference]: Start difference. First operand has 136 places, 310 transitions, 4205 flow. Second operand 10 states and 197 transitions. [2024-06-03 19:21:11,393 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 145 places, 371 transitions, 5333 flow [2024-06-03 19:21:11,555 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 141 places, 371 transitions, 5291 flow, removed 11 selfloop flow, removed 4 redundant places. [2024-06-03 19:21:11,560 INFO L231 Difference]: Finished difference. Result has 145 places, 333 transitions, 4642 flow [2024-06-03 19:21:11,560 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} [2024-06-03 19:21:11,561 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 100 predicate places. [2024-06-03 19:21:11,561 INFO L495 AbstractCegarLoop]: Abstraction has has 145 places, 333 transitions, 4642 flow [2024-06-03 19:21:11,561 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) [2024-06-03 19:21:11,561 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:21:11,561 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:21:11,561 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2024-06-03 19:21:11,561 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)] === [2024-06-03 19:21:11,562 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:21:11,562 INFO L85 PathProgramCache]: Analyzing trace with hash -434528045, now seen corresponding path program 2 times [2024-06-03 19:21:11,562 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:21:11,562 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1074133837] [2024-06-03 19:21:11,562 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:21:11,562 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:21:11,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:21:12,413 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:21:12,413 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:21:12,413 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1074133837] [2024-06-03 19:21:12,414 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1074133837] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:21:12,414 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:21:12,414 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 19:21:12,414 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1930822446] [2024-06-03 19:21:12,414 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:21:12,414 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 19:21:12,414 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:21:12,414 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 19:21:12,414 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-03 19:21:12,563 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-03 19:21:12,563 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) [2024-06-03 19:21:12,563 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:21:12,563 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-03 19:21:12,563 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:21:13,656 INFO L124 PetriNetUnfolderBase]: 3358/5133 cut-off events. [2024-06-03 19:21:13,657 INFO L125 PetriNetUnfolderBase]: For 130860/130913 co-relation queries the response was YES. [2024-06-03 19:21:13,675 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. [2024-06-03 19:21:13,696 INFO L140 encePairwiseOnDemand]: 30/44 looper letters, 303 selfloop transitions, 84 changer transitions 0/394 dead transitions. [2024-06-03 19:21:13,696 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 154 places, 394 transitions, 5841 flow [2024-06-03 19:21:13,697 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-03 19:21:13,697 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-03 19:21:13,698 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 197 transitions. [2024-06-03 19:21:13,698 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44772727272727275 [2024-06-03 19:21:13,698 INFO L175 Difference]: Start difference. First operand has 145 places, 333 transitions, 4642 flow. Second operand 10 states and 197 transitions. [2024-06-03 19:21:13,698 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 154 places, 394 transitions, 5841 flow [2024-06-03 19:21:13,853 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 150 places, 394 transitions, 5674 flow, removed 43 selfloop flow, removed 4 redundant places. [2024-06-03 19:21:13,858 INFO L231 Difference]: Finished difference. Result has 153 places, 355 transitions, 4998 flow [2024-06-03 19:21:13,858 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} [2024-06-03 19:21:13,858 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 108 predicate places. [2024-06-03 19:21:13,859 INFO L495 AbstractCegarLoop]: Abstraction has has 153 places, 355 transitions, 4998 flow [2024-06-03 19:21:13,859 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) [2024-06-03 19:21:13,859 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:21:13,859 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:21:13,859 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2024-06-03 19:21:13,859 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)] === [2024-06-03 19:21:13,860 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:21:13,860 INFO L85 PathProgramCache]: Analyzing trace with hash -1048214427, now seen corresponding path program 3 times [2024-06-03 19:21:13,860 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:21:13,860 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [725619825] [2024-06-03 19:21:13,860 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:21:13,860 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:21:13,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:21:14,603 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:21:14,603 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:21:14,603 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [725619825] [2024-06-03 19:21:14,603 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [725619825] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:21:14,603 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:21:14,603 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 19:21:14,603 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1862438787] [2024-06-03 19:21:14,603 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:21:14,604 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 19:21:14,604 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:21:14,604 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 19:21:14,604 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2024-06-03 19:21:14,744 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-03 19:21:14,745 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) [2024-06-03 19:21:14,745 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:21:14,745 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-03 19:21:14,745 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:21:16,074 INFO L124 PetriNetUnfolderBase]: 3481/5335 cut-off events. [2024-06-03 19:21:16,074 INFO L125 PetriNetUnfolderBase]: For 145203/145253 co-relation queries the response was YES. [2024-06-03 19:21:16,097 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. [2024-06-03 19:21:16,123 INFO L140 encePairwiseOnDemand]: 29/44 looper letters, 316 selfloop transitions, 114 changer transitions 0/437 dead transitions. [2024-06-03 19:21:16,123 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 164 places, 437 transitions, 6629 flow [2024-06-03 19:21:16,124 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-03 19:21:16,124 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-03 19:21:16,124 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 233 transitions. [2024-06-03 19:21:16,125 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4412878787878788 [2024-06-03 19:21:16,125 INFO L175 Difference]: Start difference. First operand has 153 places, 355 transitions, 4998 flow. Second operand 12 states and 233 transitions. [2024-06-03 19:21:16,125 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 164 places, 437 transitions, 6629 flow [2024-06-03 19:21:16,299 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 159 places, 437 transitions, 6383 flow, removed 67 selfloop flow, removed 5 redundant places. [2024-06-03 19:21:16,304 INFO L231 Difference]: Finished difference. Result has 162 places, 388 transitions, 5496 flow [2024-06-03 19:21:16,305 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} [2024-06-03 19:21:16,305 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 117 predicate places. [2024-06-03 19:21:16,305 INFO L495 AbstractCegarLoop]: Abstraction has has 162 places, 388 transitions, 5496 flow [2024-06-03 19:21:16,306 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) [2024-06-03 19:21:16,306 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:21:16,306 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:21:16,306 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2024-06-03 19:21:16,306 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)] === [2024-06-03 19:21:16,306 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:21:16,306 INFO L85 PathProgramCache]: Analyzing trace with hash -430848965, now seen corresponding path program 4 times [2024-06-03 19:21:16,307 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:21:16,307 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1360952867] [2024-06-03 19:21:16,307 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:21:16,307 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:21:16,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:21:17,003 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:21:17,004 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:21:17,004 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1360952867] [2024-06-03 19:21:17,004 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1360952867] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:21:17,004 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:21:17,004 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 19:21:17,004 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1326144759] [2024-06-03 19:21:17,004 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:21:17,004 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 19:21:17,004 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:21:17,005 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 19:21:17,005 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2024-06-03 19:21:17,091 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-03 19:21:17,092 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) [2024-06-03 19:21:17,092 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:21:17,092 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-03 19:21:17,092 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:21:18,174 INFO L124 PetriNetUnfolderBase]: 3687/5633 cut-off events. [2024-06-03 19:21:18,174 INFO L125 PetriNetUnfolderBase]: For 161493/161526 co-relation queries the response was YES. [2024-06-03 19:21:18,197 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. [2024-06-03 19:21:18,222 INFO L140 encePairwiseOnDemand]: 29/44 looper letters, 299 selfloop transitions, 211 changer transitions 0/517 dead transitions. [2024-06-03 19:21:18,222 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 171 places, 517 transitions, 8103 flow [2024-06-03 19:21:18,222 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-03 19:21:18,223 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-03 19:21:18,223 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 207 transitions. [2024-06-03 19:21:18,223 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47045454545454546 [2024-06-03 19:21:18,223 INFO L175 Difference]: Start difference. First operand has 162 places, 388 transitions, 5496 flow. Second operand 10 states and 207 transitions. [2024-06-03 19:21:18,223 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 171 places, 517 transitions, 8103 flow [2024-06-03 19:21:18,424 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 165 places, 517 transitions, 7903 flow, removed 49 selfloop flow, removed 6 redundant places. [2024-06-03 19:21:18,431 INFO L231 Difference]: Finished difference. Result has 170 places, 457 transitions, 7030 flow [2024-06-03 19:21:18,431 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} [2024-06-03 19:21:18,432 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 125 predicate places. [2024-06-03 19:21:18,432 INFO L495 AbstractCegarLoop]: Abstraction has has 170 places, 457 transitions, 7030 flow [2024-06-03 19:21:18,432 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) [2024-06-03 19:21:18,432 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:21:18,432 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:21:18,432 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2024-06-03 19:21:18,432 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)] === [2024-06-03 19:21:18,432 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:21:18,433 INFO L85 PathProgramCache]: Analyzing trace with hash 1920715267, now seen corresponding path program 5 times [2024-06-03 19:21:18,433 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:21:18,433 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1997795316] [2024-06-03 19:21:18,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:21:18,433 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:21:18,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:21:19,454 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:21:19,454 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:21:19,454 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1997795316] [2024-06-03 19:21:19,454 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1997795316] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:21:19,454 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:21:19,454 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 19:21:19,455 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [189268994] [2024-06-03 19:21:19,455 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:21:19,455 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 19:21:19,455 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:21:19,455 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 19:21:19,456 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2024-06-03 19:21:19,649 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-03 19:21:19,649 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) [2024-06-03 19:21:19,650 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:21:19,650 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-03 19:21:19,650 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:21:21,035 INFO L124 PetriNetUnfolderBase]: 3760/5748 cut-off events. [2024-06-03 19:21:21,035 INFO L125 PetriNetUnfolderBase]: For 182683/182715 co-relation queries the response was YES. [2024-06-03 19:21:21,063 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. [2024-06-03 19:21:21,091 INFO L140 encePairwiseOnDemand]: 29/44 looper letters, 261 selfloop transitions, 279 changer transitions 0/547 dead transitions. [2024-06-03 19:21:21,091 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 179 places, 547 transitions, 9426 flow [2024-06-03 19:21:21,092 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-03 19:21:21,092 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-03 19:21:21,092 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 211 transitions. [2024-06-03 19:21:21,092 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47954545454545455 [2024-06-03 19:21:21,093 INFO L175 Difference]: Start difference. First operand has 170 places, 457 transitions, 7030 flow. Second operand 10 states and 211 transitions. [2024-06-03 19:21:21,093 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 179 places, 547 transitions, 9426 flow [2024-06-03 19:21:21,344 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 176 places, 547 transitions, 9222 flow, removed 82 selfloop flow, removed 3 redundant places. [2024-06-03 19:21:21,351 INFO L231 Difference]: Finished difference. Result has 180 places, 493 transitions, 8333 flow [2024-06-03 19:21:21,352 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} [2024-06-03 19:21:21,352 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 135 predicate places. [2024-06-03 19:21:21,352 INFO L495 AbstractCegarLoop]: Abstraction has has 180 places, 493 transitions, 8333 flow [2024-06-03 19:21:21,352 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) [2024-06-03 19:21:21,353 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:21:21,353 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:21:21,353 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2024-06-03 19:21:21,353 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)] === [2024-06-03 19:21:21,353 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:21:21,353 INFO L85 PathProgramCache]: Analyzing trace with hash -1024546749, now seen corresponding path program 6 times [2024-06-03 19:21:21,353 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:21:21,354 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1742014108] [2024-06-03 19:21:21,354 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:21:21,354 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:21:21,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:21:22,143 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:21:22,143 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:21:22,144 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1742014108] [2024-06-03 19:21:22,144 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1742014108] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:21:22,144 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:21:22,144 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 19:21:22,144 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1157773949] [2024-06-03 19:21:22,144 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:21:22,144 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 19:21:22,145 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:21:22,145 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 19:21:22,145 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2024-06-03 19:21:22,291 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-03 19:21:22,291 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) [2024-06-03 19:21:22,291 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:21:22,291 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-03 19:21:22,291 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:21:23,657 INFO L124 PetriNetUnfolderBase]: 3764/5771 cut-off events. [2024-06-03 19:21:23,658 INFO L125 PetriNetUnfolderBase]: For 196838/196864 co-relation queries the response was YES. [2024-06-03 19:21:23,685 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. [2024-06-03 19:21:23,713 INFO L140 encePairwiseOnDemand]: 29/44 looper letters, 257 selfloop transitions, 281 changer transitions 0/545 dead transitions. [2024-06-03 19:21:23,713 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 189 places, 545 transitions, 10011 flow [2024-06-03 19:21:23,714 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-03 19:21:23,714 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-03 19:21:23,714 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 207 transitions. [2024-06-03 19:21:23,714 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47045454545454546 [2024-06-03 19:21:23,714 INFO L175 Difference]: Start difference. First operand has 180 places, 493 transitions, 8333 flow. Second operand 10 states and 207 transitions. [2024-06-03 19:21:23,714 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 189 places, 545 transitions, 10011 flow [2024-06-03 19:21:24,042 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 186 places, 545 transitions, 9809 flow, removed 81 selfloop flow, removed 3 redundant places. [2024-06-03 19:21:24,050 INFO L231 Difference]: Finished difference. Result has 187 places, 498 transitions, 8828 flow [2024-06-03 19:21:24,050 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} [2024-06-03 19:21:24,051 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 142 predicate places. [2024-06-03 19:21:24,051 INFO L495 AbstractCegarLoop]: Abstraction has has 187 places, 498 transitions, 8828 flow [2024-06-03 19:21:24,051 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) [2024-06-03 19:21:24,051 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:21:24,052 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:21:24,052 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2024-06-03 19:21:24,052 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)] === [2024-06-03 19:21:24,052 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:21:24,052 INFO L85 PathProgramCache]: Analyzing trace with hash 1159184975, now seen corresponding path program 7 times [2024-06-03 19:21:24,052 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:21:24,052 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [648875317] [2024-06-03 19:21:24,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:21:24,053 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:21:24,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:21:25,029 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:21:25,030 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:21:25,030 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [648875317] [2024-06-03 19:21:25,030 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [648875317] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:21:25,030 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:21:25,030 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 19:21:25,030 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [147841044] [2024-06-03 19:21:25,030 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:21:25,031 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 19:21:25,031 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:21:25,031 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 19:21:25,031 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-03 19:21:25,163 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-03 19:21:25,164 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) [2024-06-03 19:21:25,164 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:21:25,165 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-03 19:21:25,165 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:21:26,665 INFO L124 PetriNetUnfolderBase]: 3881/5954 cut-off events. [2024-06-03 19:21:26,665 INFO L125 PetriNetUnfolderBase]: For 201729/201763 co-relation queries the response was YES. [2024-06-03 19:21:26,690 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. [2024-06-03 19:21:26,716 INFO L140 encePairwiseOnDemand]: 30/44 looper letters, 451 selfloop transitions, 114 changer transitions 0/572 dead transitions. [2024-06-03 19:21:26,717 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 196 places, 572 transitions, 10815 flow [2024-06-03 19:21:26,717 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-03 19:21:26,717 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-03 19:21:26,718 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 197 transitions. [2024-06-03 19:21:26,718 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44772727272727275 [2024-06-03 19:21:26,718 INFO L175 Difference]: Start difference. First operand has 187 places, 498 transitions, 8828 flow. Second operand 10 states and 197 transitions. [2024-06-03 19:21:26,718 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 196 places, 572 transitions, 10815 flow [2024-06-03 19:21:26,976 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 189 places, 572 transitions, 10195 flow, removed 63 selfloop flow, removed 7 redundant places. [2024-06-03 19:21:26,985 INFO L231 Difference]: Finished difference. Result has 192 places, 535 transitions, 9213 flow [2024-06-03 19:21:26,985 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} [2024-06-03 19:21:26,985 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 147 predicate places. [2024-06-03 19:21:26,986 INFO L495 AbstractCegarLoop]: Abstraction has has 192 places, 535 transitions, 9213 flow [2024-06-03 19:21:26,986 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) [2024-06-03 19:21:26,986 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:21:26,986 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:21:26,986 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2024-06-03 19:21:26,986 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)] === [2024-06-03 19:21:26,987 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:21:26,987 INFO L85 PathProgramCache]: Analyzing trace with hash 1318211113, now seen corresponding path program 8 times [2024-06-03 19:21:26,987 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:21:26,987 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1362200223] [2024-06-03 19:21:26,987 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:21:26,987 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:21:26,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:21:27,901 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:21:27,901 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:21:27,901 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1362200223] [2024-06-03 19:21:27,901 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1362200223] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:21:27,901 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:21:27,901 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 19:21:27,901 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1011207005] [2024-06-03 19:21:27,901 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:21:27,902 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 19:21:27,902 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:21:27,902 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 19:21:27,902 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2024-06-03 19:21:28,062 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-03 19:21:28,062 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) [2024-06-03 19:21:28,062 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:21:28,062 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-03 19:21:28,062 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:21:29,678 INFO L124 PetriNetUnfolderBase]: 4043/6173 cut-off events. [2024-06-03 19:21:29,678 INFO L125 PetriNetUnfolderBase]: For 220007/220019 co-relation queries the response was YES. [2024-06-03 19:21:29,710 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. [2024-06-03 19:21:29,741 INFO L140 encePairwiseOnDemand]: 29/44 looper letters, 235 selfloop transitions, 388 changer transitions 0/630 dead transitions. [2024-06-03 19:21:29,741 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 201 places, 630 transitions, 11831 flow [2024-06-03 19:21:29,742 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-03 19:21:29,742 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-03 19:21:29,743 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 212 transitions. [2024-06-03 19:21:29,743 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4818181818181818 [2024-06-03 19:21:29,743 INFO L175 Difference]: Start difference. First operand has 192 places, 535 transitions, 9213 flow. Second operand 10 states and 212 transitions. [2024-06-03 19:21:29,743 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 201 places, 630 transitions, 11831 flow [2024-06-03 19:21:30,061 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 198 places, 630 transitions, 11639 flow, removed 47 selfloop flow, removed 3 redundant places. [2024-06-03 19:21:30,070 INFO L231 Difference]: Finished difference. Result has 201 places, 577 transitions, 10661 flow [2024-06-03 19:21:30,071 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} [2024-06-03 19:21:30,071 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 156 predicate places. [2024-06-03 19:21:30,071 INFO L495 AbstractCegarLoop]: Abstraction has has 201 places, 577 transitions, 10661 flow [2024-06-03 19:21:30,071 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) [2024-06-03 19:21:30,071 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:21:30,071 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:21:30,072 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2024-06-03 19:21:30,072 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)] === [2024-06-03 19:21:30,072 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:21:30,073 INFO L85 PathProgramCache]: Analyzing trace with hash 1318384093, now seen corresponding path program 9 times [2024-06-03 19:21:30,073 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:21:30,073 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1054087064] [2024-06-03 19:21:30,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:21:30,073 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:21:30,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:21:31,037 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:21:31,037 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:21:31,037 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1054087064] [2024-06-03 19:21:31,037 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1054087064] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:21:31,037 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:21:31,037 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 19:21:31,037 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [735808247] [2024-06-03 19:21:31,037 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:21:31,038 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 19:21:31,038 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:21:31,038 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 19:21:31,038 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2024-06-03 19:21:31,180 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-03 19:21:31,180 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) [2024-06-03 19:21:31,180 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:21:31,180 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-03 19:21:31,180 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:21:32,735 INFO L124 PetriNetUnfolderBase]: 4093/6247 cut-off events. [2024-06-03 19:21:32,735 INFO L125 PetriNetUnfolderBase]: For 243886/243898 co-relation queries the response was YES. [2024-06-03 19:21:32,768 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. [2024-06-03 19:21:32,798 INFO L140 encePairwiseOnDemand]: 29/44 looper letters, 253 selfloop transitions, 391 changer transitions 0/651 dead transitions. [2024-06-03 19:21:32,798 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 210 places, 651 transitions, 13086 flow [2024-06-03 19:21:32,799 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-03 19:21:32,799 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-03 19:21:32,799 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 212 transitions. [2024-06-03 19:21:32,799 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4818181818181818 [2024-06-03 19:21:32,799 INFO L175 Difference]: Start difference. First operand has 201 places, 577 transitions, 10661 flow. Second operand 10 states and 212 transitions. [2024-06-03 19:21:32,800 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 210 places, 651 transitions, 13086 flow [2024-06-03 19:21:33,202 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 207 places, 651 transitions, 12814 flow, removed 78 selfloop flow, removed 3 redundant places. [2024-06-03 19:21:33,212 INFO L231 Difference]: Finished difference. Result has 208 places, 590 transitions, 11531 flow [2024-06-03 19:21:33,213 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} [2024-06-03 19:21:33,213 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 163 predicate places. [2024-06-03 19:21:33,213 INFO L495 AbstractCegarLoop]: Abstraction has has 208 places, 590 transitions, 11531 flow [2024-06-03 19:21:33,213 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) [2024-06-03 19:21:33,213 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:21:33,213 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:21:33,214 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2024-06-03 19:21:33,214 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)] === [2024-06-03 19:21:33,214 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:21:33,214 INFO L85 PathProgramCache]: Analyzing trace with hash 238174173, now seen corresponding path program 10 times [2024-06-03 19:21:33,214 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:21:33,214 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [569019349] [2024-06-03 19:21:33,214 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:21:33,215 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:21:33,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:21:34,169 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:21:34,169 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:21:34,169 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [569019349] [2024-06-03 19:21:34,169 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [569019349] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:21:34,170 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:21:34,170 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 19:21:34,170 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [592456364] [2024-06-03 19:21:34,170 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:21:34,170 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 19:21:34,170 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:21:34,170 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 19:21:34,170 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2024-06-03 19:21:34,291 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-03 19:21:34,291 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) [2024-06-03 19:21:34,291 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:21:34,291 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-03 19:21:34,291 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:21:35,991 INFO L124 PetriNetUnfolderBase]: 4091/6259 cut-off events. [2024-06-03 19:21:35,992 INFO L125 PetriNetUnfolderBase]: For 256060/256090 co-relation queries the response was YES. [2024-06-03 19:21:36,018 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. [2024-06-03 19:21:36,048 INFO L140 encePairwiseOnDemand]: 29/44 looper letters, 242 selfloop transitions, 400 changer transitions 0/649 dead transitions. [2024-06-03 19:21:36,048 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 217 places, 649 transitions, 13562 flow [2024-06-03 19:21:36,049 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-03 19:21:36,049 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-03 19:21:36,050 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 207 transitions. [2024-06-03 19:21:36,050 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47045454545454546 [2024-06-03 19:21:36,050 INFO L175 Difference]: Start difference. First operand has 208 places, 590 transitions, 11531 flow. Second operand 10 states and 207 transitions. [2024-06-03 19:21:36,050 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 217 places, 649 transitions, 13562 flow [2024-06-03 19:21:36,546 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 211 places, 649 transitions, 12717 flow, removed 103 selfloop flow, removed 6 redundant places. [2024-06-03 19:21:36,559 INFO L231 Difference]: Finished difference. Result has 212 places, 595 transitions, 11636 flow [2024-06-03 19:21:36,559 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} [2024-06-03 19:21:36,560 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 167 predicate places. [2024-06-03 19:21:36,560 INFO L495 AbstractCegarLoop]: Abstraction has has 212 places, 595 transitions, 11636 flow [2024-06-03 19:21:36,560 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) [2024-06-03 19:21:36,560 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:21:36,560 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:21:36,560 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2024-06-03 19:21:36,561 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)] === [2024-06-03 19:21:36,561 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:21:36,561 INFO L85 PathProgramCache]: Analyzing trace with hash 1336682729, now seen corresponding path program 1 times [2024-06-03 19:21:36,561 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:21:36,561 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [744837600] [2024-06-03 19:21:36,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:21:36,562 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:21:36,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:21:37,795 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:21:37,795 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:21:37,795 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [744837600] [2024-06-03 19:21:37,795 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [744837600] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:21:37,795 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:21:37,795 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 19:21:37,795 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [712276179] [2024-06-03 19:21:37,795 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:21:37,795 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 19:21:37,795 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:21:37,796 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 19:21:37,796 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2024-06-03 19:21:37,915 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-03 19:21:37,915 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) [2024-06-03 19:21:37,915 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:21:37,915 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-03 19:21:37,915 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:21:39,437 INFO L124 PetriNetUnfolderBase]: 4681/7052 cut-off events. [2024-06-03 19:21:39,437 INFO L125 PetriNetUnfolderBase]: For 316838/316972 co-relation queries the response was YES. [2024-06-03 19:21:39,476 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. [2024-06-03 19:21:39,513 INFO L140 encePairwiseOnDemand]: 31/44 looper letters, 521 selfloop transitions, 79 changer transitions 0/644 dead transitions. [2024-06-03 19:21:39,513 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 220 places, 644 transitions, 13319 flow [2024-06-03 19:21:39,514 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 19:21:39,514 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 19:21:39,514 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 179 transitions. [2024-06-03 19:21:39,514 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45202020202020204 [2024-06-03 19:21:39,514 INFO L175 Difference]: Start difference. First operand has 212 places, 595 transitions, 11636 flow. Second operand 9 states and 179 transitions. [2024-06-03 19:21:39,514 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 220 places, 644 transitions, 13319 flow [2024-06-03 19:21:40,096 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 213 places, 644 transitions, 12461 flow, removed 103 selfloop flow, removed 7 redundant places. [2024-06-03 19:21:40,106 INFO L231 Difference]: Finished difference. Result has 216 places, 612 transitions, 11305 flow [2024-06-03 19:21:40,106 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} [2024-06-03 19:21:40,106 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 171 predicate places. [2024-06-03 19:21:40,106 INFO L495 AbstractCegarLoop]: Abstraction has has 216 places, 612 transitions, 11305 flow [2024-06-03 19:21:40,107 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) [2024-06-03 19:21:40,107 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:21:40,107 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:21:40,107 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2024-06-03 19:21:40,107 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)] === [2024-06-03 19:21:40,107 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:21:40,107 INFO L85 PathProgramCache]: Analyzing trace with hash 376789913, now seen corresponding path program 1 times [2024-06-03 19:21:40,108 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:21:40,108 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1835127553] [2024-06-03 19:21:40,108 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:21:40,108 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:21:40,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:21:40,802 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:21:40,802 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:21:40,802 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1835127553] [2024-06-03 19:21:40,802 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1835127553] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:21:40,802 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:21:40,802 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-03 19:21:40,802 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [516498222] [2024-06-03 19:21:40,802 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:21:40,802 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-03 19:21:40,802 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:21:40,803 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-03 19:21:40,803 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-03 19:21:40,888 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-03 19:21:40,888 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) [2024-06-03 19:21:40,888 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:21:40,888 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-03 19:21:40,888 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:21:42,230 INFO L124 PetriNetUnfolderBase]: 4405/6670 cut-off events. [2024-06-03 19:21:42,230 INFO L125 PetriNetUnfolderBase]: For 313690/313997 co-relation queries the response was YES. [2024-06-03 19:21:42,273 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. [2024-06-03 19:21:42,306 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 516 selfloop transitions, 25 changer transitions 0/636 dead transitions. [2024-06-03 19:21:42,307 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 222 places, 636 transitions, 12599 flow [2024-06-03 19:21:42,307 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 19:21:42,307 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 19:21:42,307 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 135 transitions. [2024-06-03 19:21:42,307 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4383116883116883 [2024-06-03 19:21:42,308 INFO L175 Difference]: Start difference. First operand has 216 places, 612 transitions, 11305 flow. Second operand 7 states and 135 transitions. [2024-06-03 19:21:42,308 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 222 places, 636 transitions, 12599 flow [2024-06-03 19:21:42,864 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 217 places, 636 transitions, 12199 flow, removed 45 selfloop flow, removed 5 redundant places. [2024-06-03 19:21:42,873 INFO L231 Difference]: Finished difference. Result has 218 places, 618 transitions, 11032 flow [2024-06-03 19:21:42,873 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} [2024-06-03 19:21:42,874 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 173 predicate places. [2024-06-03 19:21:42,874 INFO L495 AbstractCegarLoop]: Abstraction has has 218 places, 618 transitions, 11032 flow [2024-06-03 19:21:42,874 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) [2024-06-03 19:21:42,874 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:21:42,874 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:21:42,874 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2024-06-03 19:21:42,874 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)] === [2024-06-03 19:21:42,875 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:21:42,875 INFO L85 PathProgramCache]: Analyzing trace with hash -1406682433, now seen corresponding path program 11 times [2024-06-03 19:21:42,875 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:21:42,875 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1689540062] [2024-06-03 19:21:42,875 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:21:42,875 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:21:42,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:21:44,004 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:21:44,005 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:21:44,005 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1689540062] [2024-06-03 19:21:44,005 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1689540062] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:21:44,005 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:21:44,005 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 19:21:44,005 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1672859233] [2024-06-03 19:21:44,005 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:21:44,006 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 19:21:44,006 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:21:44,006 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 19:21:44,007 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-03 19:21:44,129 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-03 19:21:44,129 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) [2024-06-03 19:21:44,129 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:21:44,131 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-03 19:21:44,131 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:21:45,802 INFO L124 PetriNetUnfolderBase]: 4269/6511 cut-off events. [2024-06-03 19:21:45,803 INFO L125 PetriNetUnfolderBase]: For 314971/315094 co-relation queries the response was YES. [2024-06-03 19:21:45,839 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. [2024-06-03 19:21:45,872 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 491 selfloop transitions, 155 changer transitions 0/656 dead transitions. [2024-06-03 19:21:45,873 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 226 places, 656 transitions, 12592 flow [2024-06-03 19:21:45,873 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 19:21:45,874 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 19:21:45,874 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 179 transitions. [2024-06-03 19:21:45,874 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45202020202020204 [2024-06-03 19:21:45,874 INFO L175 Difference]: Start difference. First operand has 218 places, 618 transitions, 11032 flow. Second operand 9 states and 179 transitions. [2024-06-03 19:21:45,874 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 226 places, 656 transitions, 12592 flow [2024-06-03 19:21:46,430 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 224 places, 656 transitions, 12513 flow, removed 35 selfloop flow, removed 2 redundant places. [2024-06-03 19:21:46,440 INFO L231 Difference]: Finished difference. Result has 225 places, 621 transitions, 11411 flow [2024-06-03 19:21:46,441 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} [2024-06-03 19:21:46,441 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 180 predicate places. [2024-06-03 19:21:46,442 INFO L495 AbstractCegarLoop]: Abstraction has has 225 places, 621 transitions, 11411 flow [2024-06-03 19:21:46,442 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) [2024-06-03 19:21:46,442 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:21:46,442 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:21:46,442 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2024-06-03 19:21:46,442 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)] === [2024-06-03 19:21:46,442 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:21:46,442 INFO L85 PathProgramCache]: Analyzing trace with hash 764098835, now seen corresponding path program 12 times [2024-06-03 19:21:46,443 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:21:46,443 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2005072043] [2024-06-03 19:21:46,443 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:21:46,443 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:21:46,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:21:47,556 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:21:47,557 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:21:47,557 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2005072043] [2024-06-03 19:21:47,557 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2005072043] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:21:47,557 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:21:47,557 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 19:21:47,557 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1307217156] [2024-06-03 19:21:47,557 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:21:47,558 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 19:21:47,559 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:21:47,559 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 19:21:47,559 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-03 19:21:47,673 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-03 19:21:47,673 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) [2024-06-03 19:21:47,673 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:21:47,673 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-03 19:21:47,674 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:21:49,075 INFO L124 PetriNetUnfolderBase]: 4321/6586 cut-off events. [2024-06-03 19:21:49,076 INFO L125 PetriNetUnfolderBase]: For 336355/336505 co-relation queries the response was YES. [2024-06-03 19:21:49,114 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. [2024-06-03 19:21:49,149 INFO L140 encePairwiseOnDemand]: 31/44 looper letters, 189 selfloop transitions, 482 changer transitions 0/681 dead transitions. [2024-06-03 19:21:49,149 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 233 places, 681 transitions, 13626 flow [2024-06-03 19:21:49,150 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 19:21:49,150 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 19:21:49,150 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 188 transitions. [2024-06-03 19:21:49,151 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47474747474747475 [2024-06-03 19:21:49,151 INFO L175 Difference]: Start difference. First operand has 225 places, 621 transitions, 11411 flow. Second operand 9 states and 188 transitions. [2024-06-03 19:21:49,151 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 233 places, 681 transitions, 13626 flow [2024-06-03 19:21:49,692 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 225 places, 681 transitions, 13324 flow, removed 23 selfloop flow, removed 8 redundant places. [2024-06-03 19:21:49,703 INFO L231 Difference]: Finished difference. Result has 226 places, 632 transitions, 12428 flow [2024-06-03 19:21:49,703 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} [2024-06-03 19:21:49,704 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 181 predicate places. [2024-06-03 19:21:49,704 INFO L495 AbstractCegarLoop]: Abstraction has has 226 places, 632 transitions, 12428 flow [2024-06-03 19:21:49,704 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) [2024-06-03 19:21:49,704 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:21:49,704 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:21:49,704 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2024-06-03 19:21:49,704 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)] === [2024-06-03 19:21:49,705 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:21:49,705 INFO L85 PathProgramCache]: Analyzing trace with hash 768740465, now seen corresponding path program 13 times [2024-06-03 19:21:49,705 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:21:49,705 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [575074044] [2024-06-03 19:21:49,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:21:49,705 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:21:49,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:21:50,980 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:21:50,980 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:21:50,980 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [575074044] [2024-06-03 19:21:50,980 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [575074044] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:21:50,980 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:21:50,980 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 19:21:50,980 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1605829574] [2024-06-03 19:21:50,980 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:21:50,981 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 19:21:50,981 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:21:50,981 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 19:21:50,981 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-03 19:21:51,136 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-03 19:21:51,136 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) [2024-06-03 19:21:51,136 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:21:51,137 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-03 19:21:51,137 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:21:52,573 INFO L124 PetriNetUnfolderBase]: 4304/6588 cut-off events. [2024-06-03 19:21:52,574 INFO L125 PetriNetUnfolderBase]: For 333503/333553 co-relation queries the response was YES. [2024-06-03 19:21:52,615 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. [2024-06-03 19:21:52,651 INFO L140 encePairwiseOnDemand]: 31/44 looper letters, 222 selfloop transitions, 475 changer transitions 0/707 dead transitions. [2024-06-03 19:21:52,652 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 234 places, 707 transitions, 15038 flow [2024-06-03 19:21:52,652 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 19:21:52,652 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 19:21:52,652 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 186 transitions. [2024-06-03 19:21:52,653 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4696969696969697 [2024-06-03 19:21:52,653 INFO L175 Difference]: Start difference. First operand has 226 places, 632 transitions, 12428 flow. Second operand 9 states and 186 transitions. [2024-06-03 19:21:52,653 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 234 places, 707 transitions, 15038 flow [2024-06-03 19:21:53,278 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 226 places, 707 transitions, 14472 flow, removed 94 selfloop flow, removed 8 redundant places. [2024-06-03 19:21:53,289 INFO L231 Difference]: Finished difference. Result has 227 places, 645 transitions, 13250 flow [2024-06-03 19:21:53,289 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} [2024-06-03 19:21:53,289 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 182 predicate places. [2024-06-03 19:21:53,289 INFO L495 AbstractCegarLoop]: Abstraction has has 227 places, 645 transitions, 13250 flow [2024-06-03 19:21:53,290 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) [2024-06-03 19:21:53,290 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:21:53,290 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:21:53,290 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2024-06-03 19:21:53,290 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)] === [2024-06-03 19:21:53,290 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:21:53,290 INFO L85 PathProgramCache]: Analyzing trace with hash -1229184679, now seen corresponding path program 2 times [2024-06-03 19:21:53,291 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:21:53,291 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [407962948] [2024-06-03 19:21:53,291 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:21:53,291 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:21:53,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:21:54,601 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:21:54,601 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:21:54,601 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [407962948] [2024-06-03 19:21:54,602 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [407962948] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:21:54,602 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:21:54,602 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 19:21:54,602 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [963749773] [2024-06-03 19:21:54,602 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:21:54,602 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 19:21:54,602 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:21:54,603 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 19:21:54,603 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-03 19:21:54,697 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-03 19:21:54,697 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) [2024-06-03 19:21:54,697 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:21:54,697 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-03 19:21:54,697 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:21:56,342 INFO L124 PetriNetUnfolderBase]: 4853/7310 cut-off events. [2024-06-03 19:21:56,342 INFO L125 PetriNetUnfolderBase]: For 354295/354435 co-relation queries the response was YES. [2024-06-03 19:21:56,373 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. [2024-06-03 19:21:56,412 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 554 selfloop transitions, 83 changer transitions 0/683 dead transitions. [2024-06-03 19:21:56,412 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 234 places, 683 transitions, 14903 flow [2024-06-03 19:21:56,412 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 19:21:56,412 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 19:21:56,413 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 158 transitions. [2024-06-03 19:21:56,413 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44886363636363635 [2024-06-03 19:21:56,413 INFO L175 Difference]: Start difference. First operand has 227 places, 645 transitions, 13250 flow. Second operand 8 states and 158 transitions. [2024-06-03 19:21:56,413 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 234 places, 683 transitions, 14903 flow [2024-06-03 19:21:56,916 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 226 places, 683 transitions, 13916 flow, removed 111 selfloop flow, removed 8 redundant places. [2024-06-03 19:21:56,927 INFO L231 Difference]: Finished difference. Result has 228 places, 652 transitions, 12627 flow [2024-06-03 19:21:56,927 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} [2024-06-03 19:21:56,928 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 183 predicate places. [2024-06-03 19:21:56,928 INFO L495 AbstractCegarLoop]: Abstraction has has 228 places, 652 transitions, 12627 flow [2024-06-03 19:21:56,928 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) [2024-06-03 19:21:56,928 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:21:56,928 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:21:56,928 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2024-06-03 19:21:56,928 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)] === [2024-06-03 19:21:56,929 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:21:56,929 INFO L85 PathProgramCache]: Analyzing trace with hash -1229430943, now seen corresponding path program 14 times [2024-06-03 19:21:56,929 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:21:56,929 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [915216611] [2024-06-03 19:21:56,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:21:56,929 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:21:56,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:21:57,864 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:21:57,865 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:21:57,865 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [915216611] [2024-06-03 19:21:57,865 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [915216611] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:21:57,865 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:21:57,865 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 19:21:57,865 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [723904990] [2024-06-03 19:21:57,865 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:21:57,865 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 19:21:57,866 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:21:57,866 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 19:21:57,866 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-03 19:21:57,952 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-03 19:21:57,952 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) [2024-06-03 19:21:57,953 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:21:57,953 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-03 19:21:57,953 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:21:59,403 INFO L124 PetriNetUnfolderBase]: 4450/6812 cut-off events. [2024-06-03 19:21:59,403 INFO L125 PetriNetUnfolderBase]: For 294913/294937 co-relation queries the response was YES. [2024-06-03 19:21:59,439 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. [2024-06-03 19:21:59,472 INFO L140 encePairwiseOnDemand]: 31/44 looper letters, 242 selfloop transitions, 481 changer transitions 0/734 dead transitions. [2024-06-03 19:21:59,472 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 236 places, 734 transitions, 15445 flow [2024-06-03 19:21:59,473 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 19:21:59,473 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 19:21:59,473 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 184 transitions. [2024-06-03 19:21:59,473 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46464646464646464 [2024-06-03 19:21:59,474 INFO L175 Difference]: Start difference. First operand has 228 places, 652 transitions, 12627 flow. Second operand 9 states and 184 transitions. [2024-06-03 19:21:59,474 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 236 places, 734 transitions, 15445 flow [2024-06-03 19:21:59,999 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 231 places, 734 transitions, 15246 flow, removed 23 selfloop flow, removed 5 redundant places. [2024-06-03 19:22:00,013 INFO L231 Difference]: Finished difference. Result has 232 places, 670 transitions, 13955 flow [2024-06-03 19:22:00,014 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} [2024-06-03 19:22:00,015 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 187 predicate places. [2024-06-03 19:22:00,015 INFO L495 AbstractCegarLoop]: Abstraction has has 232 places, 670 transitions, 13955 flow [2024-06-03 19:22:00,015 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) [2024-06-03 19:22:00,015 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:22:00,015 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:22:00,015 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2024-06-03 19:22:00,016 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)] === [2024-06-03 19:22:00,016 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:22:00,016 INFO L85 PathProgramCache]: Analyzing trace with hash 1025662271, now seen corresponding path program 2 times [2024-06-03 19:22:00,016 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:22:00,016 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2041578679] [2024-06-03 19:22:00,016 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:22:00,017 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:22:00,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:22:00,854 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:22:00,854 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:22:00,854 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2041578679] [2024-06-03 19:22:00,854 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2041578679] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:22:00,854 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:22:00,854 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-03 19:22:00,855 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1256325233] [2024-06-03 19:22:00,855 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:22:00,855 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-03 19:22:00,855 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:22:00,855 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-03 19:22:00,855 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-03 19:22:00,912 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-03 19:22:00,912 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) [2024-06-03 19:22:00,913 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:22:00,913 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-03 19:22:00,913 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:22:02,417 INFO L124 PetriNetUnfolderBase]: 4581/6948 cut-off events. [2024-06-03 19:22:02,418 INFO L125 PetriNetUnfolderBase]: For 344252/344590 co-relation queries the response was YES. [2024-06-03 19:22:02,462 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. [2024-06-03 19:22:02,500 INFO L140 encePairwiseOnDemand]: 36/44 looper letters, 565 selfloop transitions, 27 changer transitions 0/687 dead transitions. [2024-06-03 19:22:02,500 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 237 places, 687 transitions, 15313 flow [2024-06-03 19:22:02,501 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-03 19:22:02,501 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-03 19:22:02,501 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 117 transitions. [2024-06-03 19:22:02,501 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4431818181818182 [2024-06-03 19:22:02,501 INFO L175 Difference]: Start difference. First operand has 232 places, 670 transitions, 13955 flow. Second operand 6 states and 117 transitions. [2024-06-03 19:22:02,501 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 237 places, 687 transitions, 15313 flow [2024-06-03 19:22:03,094 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 230 places, 687 transitions, 14203 flow, removed 150 selfloop flow, removed 7 redundant places. [2024-06-03 19:22:03,104 INFO L231 Difference]: Finished difference. Result has 231 places, 673 transitions, 12950 flow [2024-06-03 19:22:03,105 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} [2024-06-03 19:22:03,106 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 186 predicate places. [2024-06-03 19:22:03,106 INFO L495 AbstractCegarLoop]: Abstraction has has 231 places, 673 transitions, 12950 flow [2024-06-03 19:22:03,106 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) [2024-06-03 19:22:03,106 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:22:03,106 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:22:03,107 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2024-06-03 19:22:03,107 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)] === [2024-06-03 19:22:03,107 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:22:03,107 INFO L85 PathProgramCache]: Analyzing trace with hash 568306281, now seen corresponding path program 3 times [2024-06-03 19:22:03,107 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:22:03,107 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [270491957] [2024-06-03 19:22:03,107 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:22:03,107 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:22:03,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:22:04,125 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:22:04,126 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:22:04,126 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [270491957] [2024-06-03 19:22:04,126 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [270491957] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:22:04,126 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:22:04,126 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 19:22:04,126 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [921307303] [2024-06-03 19:22:04,126 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:22:04,127 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 19:22:04,127 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:22:04,127 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 19:22:04,127 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-06-03 19:22:04,260 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-03 19:22:04,260 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) [2024-06-03 19:22:04,260 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:22:04,260 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-03 19:22:04,261 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:22:05,995 INFO L124 PetriNetUnfolderBase]: 5018/7521 cut-off events. [2024-06-03 19:22:05,995 INFO L125 PetriNetUnfolderBase]: For 348785/348933 co-relation queries the response was YES. [2024-06-03 19:22:06,058 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. [2024-06-03 19:22:06,102 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 634 selfloop transitions, 18 changer transitions 0/699 dead transitions. [2024-06-03 19:22:06,103 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 238 places, 699 transitions, 14448 flow [2024-06-03 19:22:06,103 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 19:22:06,104 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 19:22:06,104 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 150 transitions. [2024-06-03 19:22:06,118 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42613636363636365 [2024-06-03 19:22:06,118 INFO L175 Difference]: Start difference. First operand has 231 places, 673 transitions, 12950 flow. Second operand 8 states and 150 transitions. [2024-06-03 19:22:06,118 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 238 places, 699 transitions, 14448 flow [2024-06-03 19:22:06,718 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 234 places, 699 transitions, 14386 flow, removed 14 selfloop flow, removed 4 redundant places. [2024-06-03 19:22:06,729 INFO L231 Difference]: Finished difference. Result has 235 places, 675 transitions, 12989 flow [2024-06-03 19:22:06,731 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} [2024-06-03 19:22:06,732 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 190 predicate places. [2024-06-03 19:22:06,732 INFO L495 AbstractCegarLoop]: Abstraction has has 235 places, 675 transitions, 12989 flow [2024-06-03 19:22:06,733 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) [2024-06-03 19:22:06,734 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:22:06,734 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:22:06,734 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2024-06-03 19:22:06,734 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)] === [2024-06-03 19:22:06,735 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:22:06,736 INFO L85 PathProgramCache]: Analyzing trace with hash 1730760441, now seen corresponding path program 1 times [2024-06-03 19:22:06,737 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:22:06,737 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2072740846] [2024-06-03 19:22:06,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:22:06,737 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:22:06,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:22:07,876 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:22:07,877 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:22:07,877 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2072740846] [2024-06-03 19:22:07,878 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2072740846] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:22:07,878 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:22:07,878 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 19:22:07,878 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1483750030] [2024-06-03 19:22:07,878 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:22:07,879 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 19:22:07,879 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:22:07,879 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 19:22:07,879 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-03 19:22:07,964 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-03 19:22:07,964 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) [2024-06-03 19:22:07,964 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:22:07,964 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-03 19:22:07,964 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:22:09,399 INFO L124 PetriNetUnfolderBase]: 4624/7003 cut-off events. [2024-06-03 19:22:09,400 INFO L125 PetriNetUnfolderBase]: For 337794/338142 co-relation queries the response was YES. [2024-06-03 19:22:09,447 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. [2024-06-03 19:22:09,486 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 574 selfloop transitions, 34 changer transitions 0/703 dead transitions. [2024-06-03 19:22:09,487 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 241 places, 703 transitions, 14441 flow [2024-06-03 19:22:09,487 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 19:22:09,487 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 19:22:09,488 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 137 transitions. [2024-06-03 19:22:09,488 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4448051948051948 [2024-06-03 19:22:09,488 INFO L175 Difference]: Start difference. First operand has 235 places, 675 transitions, 12989 flow. Second operand 7 states and 137 transitions. [2024-06-03 19:22:09,488 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 241 places, 703 transitions, 14441 flow [2024-06-03 19:22:10,045 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 235 places, 703 transitions, 14358 flow, removed 25 selfloop flow, removed 6 redundant places. [2024-06-03 19:22:10,055 INFO L231 Difference]: Finished difference. Result has 237 places, 684 transitions, 13092 flow [2024-06-03 19:22:10,056 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} [2024-06-03 19:22:10,057 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 192 predicate places. [2024-06-03 19:22:10,057 INFO L495 AbstractCegarLoop]: Abstraction has has 237 places, 684 transitions, 13092 flow [2024-06-03 19:22:10,057 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) [2024-06-03 19:22:10,057 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:22:10,057 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:22:10,057 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2024-06-03 19:22:10,058 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)] === [2024-06-03 19:22:10,058 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:22:10,058 INFO L85 PathProgramCache]: Analyzing trace with hash 558119061, now seen corresponding path program 4 times [2024-06-03 19:22:10,058 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:22:10,058 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1083072340] [2024-06-03 19:22:10,059 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:22:10,059 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:22:10,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:22:11,178 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:22:11,178 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:22:11,178 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1083072340] [2024-06-03 19:22:11,178 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1083072340] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:22:11,179 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:22:11,179 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 19:22:11,179 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1163201974] [2024-06-03 19:22:11,179 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:22:11,179 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 19:22:11,179 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:22:11,179 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 19:22:11,180 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-06-03 19:22:11,298 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-03 19:22:11,299 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) [2024-06-03 19:22:11,299 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:22:11,299 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-03 19:22:11,299 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:22:13,114 INFO L124 PetriNetUnfolderBase]: 5064/7588 cut-off events. [2024-06-03 19:22:13,115 INFO L125 PetriNetUnfolderBase]: For 369663/369820 co-relation queries the response was YES. [2024-06-03 19:22:13,148 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. [2024-06-03 19:22:13,187 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 634 selfloop transitions, 32 changer transitions 0/713 dead transitions. [2024-06-03 19:22:13,187 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 244 places, 713 transitions, 14668 flow [2024-06-03 19:22:13,188 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 19:22:13,188 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 19:22:13,188 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 151 transitions. [2024-06-03 19:22:13,188 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4289772727272727 [2024-06-03 19:22:13,189 INFO L175 Difference]: Start difference. First operand has 237 places, 684 transitions, 13092 flow. Second operand 8 states and 151 transitions. [2024-06-03 19:22:13,189 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 244 places, 713 transitions, 14668 flow [2024-06-03 19:22:13,703 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 242 places, 713 transitions, 14623 flow, removed 17 selfloop flow, removed 2 redundant places. [2024-06-03 19:22:13,714 INFO L231 Difference]: Finished difference. Result has 243 places, 686 transitions, 13185 flow [2024-06-03 19:22:13,714 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} [2024-06-03 19:22:13,715 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 198 predicate places. [2024-06-03 19:22:13,715 INFO L495 AbstractCegarLoop]: Abstraction has has 243 places, 686 transitions, 13185 flow [2024-06-03 19:22:13,715 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) [2024-06-03 19:22:13,715 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:22:13,715 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:22:13,715 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2024-06-03 19:22:13,716 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)] === [2024-06-03 19:22:13,716 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:22:13,716 INFO L85 PathProgramCache]: Analyzing trace with hash 567949781, now seen corresponding path program 1 times [2024-06-03 19:22:13,716 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:22:13,716 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2006286434] [2024-06-03 19:22:13,716 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:22:13,717 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:22:13,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:22:14,750 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:22:14,751 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:22:14,751 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2006286434] [2024-06-03 19:22:14,751 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2006286434] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:22:14,751 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:22:14,751 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 19:22:14,751 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1244637307] [2024-06-03 19:22:14,752 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:22:14,752 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 19:22:14,752 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:22:14,753 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 19:22:14,754 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-03 19:22:14,865 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 44 [2024-06-03 19:22:14,865 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) [2024-06-03 19:22:14,865 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:22:14,865 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 44 [2024-06-03 19:22:14,866 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:22:16,890 INFO L124 PetriNetUnfolderBase]: 5396/8014 cut-off events. [2024-06-03 19:22:16,890 INFO L125 PetriNetUnfolderBase]: For 370103/370124 co-relation queries the response was YES. [2024-06-03 19:22:16,937 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. [2024-06-03 19:22:16,976 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 678 selfloop transitions, 48 changer transitions 0/734 dead transitions. [2024-06-03 19:22:16,976 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 250 places, 734 transitions, 15275 flow [2024-06-03 19:22:16,977 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 19:22:16,977 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 19:22:16,992 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 145 transitions. [2024-06-03 19:22:16,992 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4119318181818182 [2024-06-03 19:22:16,993 INFO L175 Difference]: Start difference. First operand has 243 places, 686 transitions, 13185 flow. Second operand 8 states and 145 transitions. [2024-06-03 19:22:16,993 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 250 places, 734 transitions, 15275 flow [2024-06-03 19:22:17,665 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 245 places, 734 transitions, 15167 flow, removed 28 selfloop flow, removed 5 redundant places. [2024-06-03 19:22:17,676 INFO L231 Difference]: Finished difference. Result has 246 places, 704 transitions, 13629 flow [2024-06-03 19:22:17,676 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} [2024-06-03 19:22:17,677 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 201 predicate places. [2024-06-03 19:22:17,677 INFO L495 AbstractCegarLoop]: Abstraction has has 246 places, 704 transitions, 13629 flow [2024-06-03 19:22:17,677 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) [2024-06-03 19:22:17,677 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:22:17,677 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:22:17,677 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2024-06-03 19:22:17,677 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)] === [2024-06-03 19:22:17,678 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:22:17,678 INFO L85 PathProgramCache]: Analyzing trace with hash -1370856821, now seen corresponding path program 5 times [2024-06-03 19:22:17,678 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:22:17,678 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1860637028] [2024-06-03 19:22:17,678 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:22:17,678 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:22:17,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:22:18,853 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:22:18,854 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:22:18,854 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1860637028] [2024-06-03 19:22:18,854 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1860637028] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:22:18,854 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:22:18,854 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 19:22:18,854 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [704058649] [2024-06-03 19:22:18,854 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:22:18,855 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 19:22:18,857 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:22:18,858 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 19:22:18,858 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-03 19:22:18,962 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-03 19:22:18,962 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) [2024-06-03 19:22:18,962 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:22:18,962 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-03 19:22:18,962 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:22:20,660 INFO L124 PetriNetUnfolderBase]: 5102/7645 cut-off events. [2024-06-03 19:22:20,661 INFO L125 PetriNetUnfolderBase]: For 400241/400413 co-relation queries the response was YES. [2024-06-03 19:22:20,705 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. [2024-06-03 19:22:20,745 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 642 selfloop transitions, 44 changer transitions 0/740 dead transitions. [2024-06-03 19:22:20,745 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 253 places, 740 transitions, 15379 flow [2024-06-03 19:22:20,746 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 19:22:20,746 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 19:22:20,746 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 153 transitions. [2024-06-03 19:22:20,746 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4346590909090909 [2024-06-03 19:22:20,746 INFO L175 Difference]: Start difference. First operand has 246 places, 704 transitions, 13629 flow. Second operand 8 states and 153 transitions. [2024-06-03 19:22:20,747 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 253 places, 740 transitions, 15379 flow [2024-06-03 19:22:21,554 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 247 places, 740 transitions, 15255 flow, removed 26 selfloop flow, removed 6 redundant places. [2024-06-03 19:22:21,569 INFO L231 Difference]: Finished difference. Result has 249 places, 711 transitions, 13812 flow [2024-06-03 19:22:21,570 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} [2024-06-03 19:22:21,570 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 204 predicate places. [2024-06-03 19:22:21,570 INFO L495 AbstractCegarLoop]: Abstraction has has 249 places, 711 transitions, 13812 flow [2024-06-03 19:22:21,570 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) [2024-06-03 19:22:21,571 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:22:21,571 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:22:21,571 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2024-06-03 19:22:21,571 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)] === [2024-06-03 19:22:21,571 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:22:21,571 INFO L85 PathProgramCache]: Analyzing trace with hash -1371103085, now seen corresponding path program 15 times [2024-06-03 19:22:21,572 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:22:21,572 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1633035034] [2024-06-03 19:22:21,572 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:22:21,572 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:22:21,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:22:22,878 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:22:22,878 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:22:22,878 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1633035034] [2024-06-03 19:22:22,878 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1633035034] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:22:22,878 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:22:22,879 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 19:22:22,879 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [925111296] [2024-06-03 19:22:22,879 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:22:22,879 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 19:22:22,879 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:22:22,879 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 19:22:22,879 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-03 19:22:23,003 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-03 19:22:23,004 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) [2024-06-03 19:22:23,004 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:22:23,004 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-03 19:22:23,004 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:22:24,608 INFO L124 PetriNetUnfolderBase]: 4515/6869 cut-off events. [2024-06-03 19:22:24,608 INFO L125 PetriNetUnfolderBase]: For 384049/384072 co-relation queries the response was YES. [2024-06-03 19:22:24,653 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. [2024-06-03 19:22:24,691 INFO L140 encePairwiseOnDemand]: 31/44 looper letters, 636 selfloop transitions, 105 changer transitions 0/754 dead transitions. [2024-06-03 19:22:24,691 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 257 places, 754 transitions, 15713 flow [2024-06-03 19:22:24,691 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 19:22:24,692 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 19:22:24,700 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 170 transitions. [2024-06-03 19:22:24,700 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4292929292929293 [2024-06-03 19:22:24,700 INFO L175 Difference]: Start difference. First operand has 249 places, 711 transitions, 13812 flow. Second operand 9 states and 170 transitions. [2024-06-03 19:22:24,701 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 257 places, 754 transitions, 15713 flow [2024-06-03 19:22:25,572 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 252 places, 754 transitions, 15186 flow, removed 223 selfloop flow, removed 5 redundant places. [2024-06-03 19:22:25,583 INFO L231 Difference]: Finished difference. Result has 253 places, 711 transitions, 13522 flow [2024-06-03 19:22:25,584 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} [2024-06-03 19:22:25,584 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 208 predicate places. [2024-06-03 19:22:25,584 INFO L495 AbstractCegarLoop]: Abstraction has has 253 places, 711 transitions, 13522 flow [2024-06-03 19:22:25,585 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) [2024-06-03 19:22:25,585 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:22:25,585 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:22:25,585 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2024-06-03 19:22:25,585 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)] === [2024-06-03 19:22:25,585 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:22:25,585 INFO L85 PathProgramCache]: Analyzing trace with hash 1529260505, now seen corresponding path program 3 times [2024-06-03 19:22:25,585 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:22:25,586 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [737923151] [2024-06-03 19:22:25,586 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:22:25,586 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:22:25,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:22:26,408 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:22:26,409 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:22:26,409 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [737923151] [2024-06-03 19:22:26,409 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [737923151] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:22:26,409 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:22:26,409 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-03 19:22:26,409 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1982903646] [2024-06-03 19:22:26,409 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:22:26,409 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-03 19:22:26,409 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:22:26,409 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-03 19:22:26,409 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-03 19:22:26,464 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-03 19:22:26,464 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) [2024-06-03 19:22:26,464 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:22:26,464 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-03 19:22:26,464 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:22:27,956 INFO L124 PetriNetUnfolderBase]: 4691/7054 cut-off events. [2024-06-03 19:22:27,956 INFO L125 PetriNetUnfolderBase]: For 391844/392297 co-relation queries the response was YES. [2024-06-03 19:22:28,003 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. [2024-06-03 19:22:28,043 INFO L140 encePairwiseOnDemand]: 36/44 looper letters, 605 selfloop transitions, 12 changer transitions 0/719 dead transitions. [2024-06-03 19:22:28,043 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 258 places, 719 transitions, 14792 flow [2024-06-03 19:22:28,044 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-03 19:22:28,044 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-03 19:22:28,045 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 108 transitions. [2024-06-03 19:22:28,045 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4090909090909091 [2024-06-03 19:22:28,045 INFO L175 Difference]: Start difference. First operand has 253 places, 711 transitions, 13522 flow. Second operand 6 states and 108 transitions. [2024-06-03 19:22:28,045 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 258 places, 719 transitions, 14792 flow [2024-06-03 19:22:28,581 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 249 places, 719 transitions, 13909 flow, removed 62 selfloop flow, removed 9 redundant places. [2024-06-03 19:22:28,591 INFO L231 Difference]: Finished difference. Result has 250 places, 711 transitions, 12669 flow [2024-06-03 19:22:28,591 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} [2024-06-03 19:22:28,592 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 205 predicate places. [2024-06-03 19:22:28,592 INFO L495 AbstractCegarLoop]: Abstraction has has 250 places, 711 transitions, 12669 flow [2024-06-03 19:22:28,592 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) [2024-06-03 19:22:28,592 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:22:28,592 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:22:28,592 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2024-06-03 19:22:28,593 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)] === [2024-06-03 19:22:28,593 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:22:28,593 INFO L85 PathProgramCache]: Analyzing trace with hash 1523554521, now seen corresponding path program 1 times [2024-06-03 19:22:28,593 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:22:28,593 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1955715981] [2024-06-03 19:22:28,593 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:22:28,593 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:22:28,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:22:29,322 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:22:29,322 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:22:29,322 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1955715981] [2024-06-03 19:22:29,322 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1955715981] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:22:29,322 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:22:29,322 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-03 19:22:29,322 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [554630724] [2024-06-03 19:22:29,322 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:22:29,323 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-03 19:22:29,323 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:22:29,323 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-03 19:22:29,323 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-03 19:22:29,378 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 44 [2024-06-03 19:22:29,379 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) [2024-06-03 19:22:29,379 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:22:29,379 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 44 [2024-06-03 19:22:29,379 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:22:31,082 INFO L124 PetriNetUnfolderBase]: 5147/7678 cut-off events. [2024-06-03 19:22:31,083 INFO L125 PetriNetUnfolderBase]: For 332442/332591 co-relation queries the response was YES. [2024-06-03 19:22:31,134 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. [2024-06-03 19:22:31,172 INFO L140 encePairwiseOnDemand]: 36/44 looper letters, 663 selfloop transitions, 17 changer transitions 0/729 dead transitions. [2024-06-03 19:22:31,172 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 255 places, 729 transitions, 14217 flow [2024-06-03 19:22:31,172 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-03 19:22:31,172 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-03 19:22:31,174 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 109 transitions. [2024-06-03 19:22:31,174 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4128787878787879 [2024-06-03 19:22:31,175 INFO L175 Difference]: Start difference. First operand has 250 places, 711 transitions, 12669 flow. Second operand 6 states and 109 transitions. [2024-06-03 19:22:31,175 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 255 places, 729 transitions, 14217 flow [2024-06-03 19:22:31,653 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 249 places, 729 transitions, 14120 flow, removed 18 selfloop flow, removed 6 redundant places. [2024-06-03 19:22:31,663 INFO L231 Difference]: Finished difference. Result has 250 places, 717 transitions, 12672 flow [2024-06-03 19:22:31,663 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} [2024-06-03 19:22:31,664 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 205 predicate places. [2024-06-03 19:22:31,664 INFO L495 AbstractCegarLoop]: Abstraction has has 250 places, 717 transitions, 12672 flow [2024-06-03 19:22:31,664 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) [2024-06-03 19:22:31,664 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:22:31,664 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:22:31,664 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2024-06-03 19:22:31,665 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)] === [2024-06-03 19:22:31,665 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:22:31,665 INFO L85 PathProgramCache]: Analyzing trace with hash 1987751931, now seen corresponding path program 2 times [2024-06-03 19:22:31,665 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:22:31,665 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [569644223] [2024-06-03 19:22:31,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:22:31,665 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:22:31,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:22:32,359 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:22:32,359 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:22:32,359 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [569644223] [2024-06-03 19:22:32,359 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [569644223] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:22:32,359 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:22:32,360 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-03 19:22:32,360 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [718505061] [2024-06-03 19:22:32,360 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:22:32,360 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-03 19:22:32,360 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:22:32,360 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-03 19:22:32,361 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-03 19:22:32,422 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 44 [2024-06-03 19:22:32,422 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) [2024-06-03 19:22:32,422 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:22:32,422 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 44 [2024-06-03 19:22:32,422 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:22:34,091 INFO L124 PetriNetUnfolderBase]: 5148/7678 cut-off events. [2024-06-03 19:22:34,092 INFO L125 PetriNetUnfolderBase]: For 331143/331292 co-relation queries the response was YES. [2024-06-03 19:22:34,137 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. [2024-06-03 19:22:34,174 INFO L140 encePairwiseOnDemand]: 36/44 looper letters, 659 selfloop transitions, 17 changer transitions 0/725 dead transitions. [2024-06-03 19:22:34,174 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 255 places, 725 transitions, 14060 flow [2024-06-03 19:22:34,175 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-03 19:22:34,175 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-03 19:22:34,175 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 105 transitions. [2024-06-03 19:22:34,175 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3977272727272727 [2024-06-03 19:22:34,175 INFO L175 Difference]: Start difference. First operand has 250 places, 717 transitions, 12672 flow. Second operand 6 states and 105 transitions. [2024-06-03 19:22:34,175 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 255 places, 725 transitions, 14060 flow [2024-06-03 19:22:34,693 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 252 places, 725 transitions, 13976 flow, removed 25 selfloop flow, removed 3 redundant places. [2024-06-03 19:22:34,703 INFO L231 Difference]: Finished difference. Result has 253 places, 717 transitions, 12628 flow [2024-06-03 19:22:34,704 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} [2024-06-03 19:22:34,704 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 208 predicate places. [2024-06-03 19:22:34,704 INFO L495 AbstractCegarLoop]: Abstraction has has 253 places, 717 transitions, 12628 flow [2024-06-03 19:22:34,704 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) [2024-06-03 19:22:34,704 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:22:34,704 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:22:34,705 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2024-06-03 19:22:34,705 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)] === [2024-06-03 19:22:34,705 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:22:34,705 INFO L85 PathProgramCache]: Analyzing trace with hash 2135230660, now seen corresponding path program 1 times [2024-06-03 19:22:34,705 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:22:34,705 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1864323987] [2024-06-03 19:22:34,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:22:34,705 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:22:34,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:22:35,399 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:22:35,400 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:22:35,400 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1864323987] [2024-06-03 19:22:35,400 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1864323987] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:22:35,400 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:22:35,400 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 19:22:35,400 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [686085949] [2024-06-03 19:22:35,400 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:22:35,400 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 19:22:35,401 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:22:35,401 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 19:22:35,401 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2024-06-03 19:22:35,572 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-03 19:22:35,572 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) [2024-06-03 19:22:35,572 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:22:35,572 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-03 19:22:35,572 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:22:37,706 INFO L124 PetriNetUnfolderBase]: 4637/7059 cut-off events. [2024-06-03 19:22:37,707 INFO L125 PetriNetUnfolderBase]: For 343550/343577 co-relation queries the response was YES. [2024-06-03 19:22:37,750 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. [2024-06-03 19:22:37,787 INFO L140 encePairwiseOnDemand]: 30/44 looper letters, 619 selfloop transitions, 157 changer transitions 0/793 dead transitions. [2024-06-03 19:22:37,788 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 264 places, 793 transitions, 15047 flow [2024-06-03 19:22:37,788 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-03 19:22:37,789 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-03 19:22:37,789 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 239 transitions. [2024-06-03 19:22:37,789 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45265151515151514 [2024-06-03 19:22:37,789 INFO L175 Difference]: Start difference. First operand has 253 places, 717 transitions, 12628 flow. Second operand 12 states and 239 transitions. [2024-06-03 19:22:37,789 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 264 places, 793 transitions, 15047 flow [2024-06-03 19:22:38,341 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 258 places, 793 transitions, 15001 flow, removed 2 selfloop flow, removed 6 redundant places. [2024-06-03 19:22:38,352 INFO L231 Difference]: Finished difference. Result has 261 places, 740 transitions, 13344 flow [2024-06-03 19:22:38,352 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} [2024-06-03 19:22:38,352 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 216 predicate places. [2024-06-03 19:22:38,353 INFO L495 AbstractCegarLoop]: Abstraction has has 261 places, 740 transitions, 13344 flow [2024-06-03 19:22:38,353 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) [2024-06-03 19:22:38,353 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:22:38,353 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:22:38,353 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2024-06-03 19:22:38,353 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)] === [2024-06-03 19:22:38,353 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:22:38,354 INFO L85 PathProgramCache]: Analyzing trace with hash -471414686, now seen corresponding path program 2 times [2024-06-03 19:22:38,354 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:22:38,354 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1838732852] [2024-06-03 19:22:38,354 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:22:38,354 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:22:38,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:22:39,484 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:22:39,485 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:22:39,485 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1838732852] [2024-06-03 19:22:39,485 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1838732852] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:22:39,485 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:22:39,485 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-03 19:22:39,485 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [385435544] [2024-06-03 19:22:39,485 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:22:39,485 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-03 19:22:39,485 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:22:39,486 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-03 19:22:39,486 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2024-06-03 19:22:39,648 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-03 19:22:39,648 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) [2024-06-03 19:22:39,648 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:22:39,648 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-03 19:22:39,648 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:22:41,715 INFO L124 PetriNetUnfolderBase]: 4655/7074 cut-off events. [2024-06-03 19:22:41,717 INFO L125 PetriNetUnfolderBase]: For 360770/360791 co-relation queries the response was YES. [2024-06-03 19:22:41,764 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. [2024-06-03 19:22:41,804 INFO L140 encePairwiseOnDemand]: 28/44 looper letters, 445 selfloop transitions, 344 changer transitions 0/806 dead transitions. [2024-06-03 19:22:41,804 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 271 places, 806 transitions, 15604 flow [2024-06-03 19:22:41,804 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-03 19:22:41,805 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-03 19:22:41,812 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 222 transitions. [2024-06-03 19:22:41,812 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45867768595041325 [2024-06-03 19:22:41,812 INFO L175 Difference]: Start difference. First operand has 261 places, 740 transitions, 13344 flow. Second operand 11 states and 222 transitions. [2024-06-03 19:22:41,813 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 271 places, 806 transitions, 15604 flow [2024-06-03 19:22:42,434 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 267 places, 806 transitions, 15444 flow, removed 53 selfloop flow, removed 4 redundant places. [2024-06-03 19:22:42,448 INFO L231 Difference]: Finished difference. Result has 268 places, 743 transitions, 13966 flow [2024-06-03 19:22:42,448 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} [2024-06-03 19:22:42,449 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 223 predicate places. [2024-06-03 19:22:42,449 INFO L495 AbstractCegarLoop]: Abstraction has has 268 places, 743 transitions, 13966 flow [2024-06-03 19:22:42,449 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) [2024-06-03 19:22:42,449 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:22:42,449 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:22:42,449 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2024-06-03 19:22:42,449 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)] === [2024-06-03 19:22:42,450 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:22:42,450 INFO L85 PathProgramCache]: Analyzing trace with hash -628945526, now seen corresponding path program 3 times [2024-06-03 19:22:42,450 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:22:42,450 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [381194151] [2024-06-03 19:22:42,450 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:22:42,450 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:22:42,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:22:43,579 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:22:43,580 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:22:43,580 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [381194151] [2024-06-03 19:22:43,580 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [381194151] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:22:43,580 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:22:43,580 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-03 19:22:43,580 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [37461277] [2024-06-03 19:22:43,580 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:22:43,580 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-03 19:22:43,580 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:22:43,581 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-03 19:22:43,581 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-06-03 19:22:43,826 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-03 19:22:43,826 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) [2024-06-03 19:22:43,826 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:22:43,826 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-03 19:22:43,826 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:22:45,775 INFO L124 PetriNetUnfolderBase]: 4733/7200 cut-off events. [2024-06-03 19:22:45,775 INFO L125 PetriNetUnfolderBase]: For 384286/384309 co-relation queries the response was YES. [2024-06-03 19:22:45,821 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. [2024-06-03 19:22:45,859 INFO L140 encePairwiseOnDemand]: 29/44 looper letters, 653 selfloop transitions, 135 changer transitions 0/805 dead transitions. [2024-06-03 19:22:45,860 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 279 places, 805 transitions, 15984 flow [2024-06-03 19:22:45,860 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-03 19:22:45,860 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-03 19:22:45,861 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 233 transitions. [2024-06-03 19:22:45,861 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4412878787878788 [2024-06-03 19:22:45,861 INFO L175 Difference]: Start difference. First operand has 268 places, 743 transitions, 13966 flow. Second operand 12 states and 233 transitions. [2024-06-03 19:22:45,861 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 279 places, 805 transitions, 15984 flow [2024-06-03 19:22:46,428 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 271 places, 805 transitions, 15339 flow, removed 31 selfloop flow, removed 8 redundant places. [2024-06-03 19:22:46,439 INFO L231 Difference]: Finished difference. Result has 273 places, 758 transitions, 13837 flow [2024-06-03 19:22:46,440 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} [2024-06-03 19:22:46,440 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 228 predicate places. [2024-06-03 19:22:46,440 INFO L495 AbstractCegarLoop]: Abstraction has has 273 places, 758 transitions, 13837 flow [2024-06-03 19:22:46,441 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) [2024-06-03 19:22:46,441 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:22:46,441 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:22:46,441 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2024-06-03 19:22:46,441 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)] === [2024-06-03 19:22:46,442 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:22:46,442 INFO L85 PathProgramCache]: Analyzing trace with hash -1942486000, now seen corresponding path program 4 times [2024-06-03 19:22:46,442 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:22:46,442 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [179843880] [2024-06-03 19:22:46,442 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:22:46,442 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:22:46,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:22:47,692 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:22:47,692 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:22:47,692 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [179843880] [2024-06-03 19:22:47,692 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [179843880] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:22:47,692 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:22:47,692 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-03 19:22:47,692 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [66698311] [2024-06-03 19:22:47,692 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:22:47,693 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-03 19:22:47,693 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:22:47,693 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-03 19:22:47,693 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2024-06-03 19:22:47,873 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-03 19:22:47,873 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) [2024-06-03 19:22:47,873 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:22:47,873 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-03 19:22:47,873 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:22:49,916 INFO L124 PetriNetUnfolderBase]: 4829/7366 cut-off events. [2024-06-03 19:22:49,916 INFO L125 PetriNetUnfolderBase]: For 385088/385103 co-relation queries the response was YES. [2024-06-03 19:22:49,969 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. [2024-06-03 19:22:50,013 INFO L140 encePairwiseOnDemand]: 29/44 looper letters, 668 selfloop transitions, 140 changer transitions 0/825 dead transitions. [2024-06-03 19:22:50,013 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 284 places, 825 transitions, 16010 flow [2024-06-03 19:22:50,022 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-03 19:22:50,023 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-03 19:22:50,023 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 233 transitions. [2024-06-03 19:22:50,023 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4412878787878788 [2024-06-03 19:22:50,023 INFO L175 Difference]: Start difference. First operand has 273 places, 758 transitions, 13837 flow. Second operand 12 states and 233 transitions. [2024-06-03 19:22:50,023 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 284 places, 825 transitions, 16010 flow [2024-06-03 19:22:50,705 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 275 places, 825 transitions, 15624 flow, removed 70 selfloop flow, removed 9 redundant places. [2024-06-03 19:22:50,717 INFO L231 Difference]: Finished difference. Result has 277 places, 779 transitions, 14128 flow [2024-06-03 19:22:50,717 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} [2024-06-03 19:22:50,717 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 232 predicate places. [2024-06-03 19:22:50,717 INFO L495 AbstractCegarLoop]: Abstraction has has 277 places, 779 transitions, 14128 flow [2024-06-03 19:22:50,718 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) [2024-06-03 19:22:50,718 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:22:50,718 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:22:50,718 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2024-06-03 19:22:50,718 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)] === [2024-06-03 19:22:50,718 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:22:50,718 INFO L85 PathProgramCache]: Analyzing trace with hash -1824279280, now seen corresponding path program 5 times [2024-06-03 19:22:50,719 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:22:50,719 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1914967428] [2024-06-03 19:22:50,719 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:22:50,719 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:22:50,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:22:52,011 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:22:52,011 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:22:52,011 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1914967428] [2024-06-03 19:22:52,012 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1914967428] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:22:52,012 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:22:52,012 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-03 19:22:52,012 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1357110007] [2024-06-03 19:22:52,012 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:22:52,012 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-03 19:22:52,012 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:22:52,012 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-03 19:22:52,012 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2024-06-03 19:22:52,174 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-03 19:22:52,174 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) [2024-06-03 19:22:52,174 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:22:52,174 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-03 19:22:52,174 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:22:54,309 INFO L124 PetriNetUnfolderBase]: 4850/7388 cut-off events. [2024-06-03 19:22:54,309 INFO L125 PetriNetUnfolderBase]: For 398484/398500 co-relation queries the response was YES. [2024-06-03 19:22:54,363 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. [2024-06-03 19:22:54,404 INFO L140 encePairwiseOnDemand]: 28/44 looper letters, 411 selfloop transitions, 413 changer transitions 0/841 dead transitions. [2024-06-03 19:22:54,404 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 287 places, 841 transitions, 16347 flow [2024-06-03 19:22:54,405 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-03 19:22:54,405 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-03 19:22:54,405 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 224 transitions. [2024-06-03 19:22:54,405 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4628099173553719 [2024-06-03 19:22:54,405 INFO L175 Difference]: Start difference. First operand has 277 places, 779 transitions, 14128 flow. Second operand 11 states and 224 transitions. [2024-06-03 19:22:54,406 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 287 places, 841 transitions, 16347 flow [2024-06-03 19:22:55,175 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 279 places, 841 transitions, 16045 flow, removed 48 selfloop flow, removed 8 redundant places. [2024-06-03 19:22:55,188 INFO L231 Difference]: Finished difference. Result has 280 places, 785 transitions, 14766 flow [2024-06-03 19:22:55,189 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} [2024-06-03 19:22:55,189 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 235 predicate places. [2024-06-03 19:22:55,189 INFO L495 AbstractCegarLoop]: Abstraction has has 280 places, 785 transitions, 14766 flow [2024-06-03 19:22:55,189 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) [2024-06-03 19:22:55,190 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:22:55,190 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:22:55,190 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2024-06-03 19:22:55,190 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)] === [2024-06-03 19:22:55,190 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:22:55,190 INFO L85 PathProgramCache]: Analyzing trace with hash -1650727055, now seen corresponding path program 1 times [2024-06-03 19:22:55,190 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:22:55,190 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [596885049] [2024-06-03 19:22:55,191 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:22:55,191 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:22:55,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:22:56,426 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:22:56,426 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:22:56,426 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [596885049] [2024-06-03 19:22:56,426 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [596885049] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:22:56,426 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:22:56,427 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 19:22:56,427 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [76751327] [2024-06-03 19:22:56,427 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:22:56,428 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 19:22:56,428 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:22:56,428 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 19:22:56,428 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-03 19:22:56,527 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 44 [2024-06-03 19:22:56,527 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) [2024-06-03 19:22:56,527 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:22:56,527 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 44 [2024-06-03 19:22:56,527 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:22:58,565 INFO L124 PetriNetUnfolderBase]: 5821/8652 cut-off events. [2024-06-03 19:22:58,565 INFO L125 PetriNetUnfolderBase]: For 481984/482019 co-relation queries the response was YES. [2024-06-03 19:22:58,640 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. [2024-06-03 19:22:58,692 INFO L140 encePairwiseOnDemand]: 30/44 looper letters, 617 selfloop transitions, 224 changer transitions 0/851 dead transitions. [2024-06-03 19:22:58,692 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 289 places, 851 transitions, 17217 flow [2024-06-03 19:22:58,693 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-03 19:22:58,693 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-03 19:22:58,694 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 193 transitions. [2024-06-03 19:22:58,694 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43863636363636366 [2024-06-03 19:22:58,695 INFO L175 Difference]: Start difference. First operand has 280 places, 785 transitions, 14766 flow. Second operand 10 states and 193 transitions. [2024-06-03 19:22:58,695 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 289 places, 851 transitions, 17217 flow [2024-06-03 19:22:59,922 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 280 places, 851 transitions, 16454 flow, removed 31 selfloop flow, removed 9 redundant places. [2024-06-03 19:22:59,935 INFO L231 Difference]: Finished difference. Result has 283 places, 813 transitions, 15105 flow [2024-06-03 19:22:59,935 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} [2024-06-03 19:22:59,936 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 238 predicate places. [2024-06-03 19:22:59,936 INFO L495 AbstractCegarLoop]: Abstraction has has 283 places, 813 transitions, 15105 flow [2024-06-03 19:22:59,936 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) [2024-06-03 19:22:59,936 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:22:59,936 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:22:59,936 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2024-06-03 19:22:59,936 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)] === [2024-06-03 19:22:59,937 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:22:59,937 INFO L85 PathProgramCache]: Analyzing trace with hash -443476996, now seen corresponding path program 6 times [2024-06-03 19:22:59,937 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:22:59,941 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1930871463] [2024-06-03 19:22:59,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:22:59,941 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:22:59,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:23:01,121 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:23:01,121 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:23:01,121 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1930871463] [2024-06-03 19:23:01,122 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1930871463] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:23:01,122 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:23:01,122 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-03 19:23:01,122 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1764550023] [2024-06-03 19:23:01,122 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:23:01,122 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-03 19:23:01,122 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:23:01,123 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-03 19:23:01,123 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2024-06-03 19:23:01,289 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-03 19:23:01,290 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) [2024-06-03 19:23:01,290 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:23:01,290 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-03 19:23:01,290 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:23:03,511 INFO L124 PetriNetUnfolderBase]: 4938/7546 cut-off events. [2024-06-03 19:23:03,511 INFO L125 PetriNetUnfolderBase]: For 444809/444832 co-relation queries the response was YES. [2024-06-03 19:23:03,558 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. [2024-06-03 19:23:03,600 INFO L140 encePairwiseOnDemand]: 28/44 looper letters, 436 selfloop transitions, 412 changer transitions 0/866 dead transitions. [2024-06-03 19:23:03,600 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 293 places, 866 transitions, 17302 flow [2024-06-03 19:23:03,601 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-03 19:23:03,601 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-03 19:23:03,601 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 222 transitions. [2024-06-03 19:23:03,601 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45867768595041325 [2024-06-03 19:23:03,601 INFO L175 Difference]: Start difference. First operand has 283 places, 813 transitions, 15105 flow. Second operand 11 states and 222 transitions. [2024-06-03 19:23:03,601 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 293 places, 866 transitions, 17302 flow [2024-06-03 19:23:04,361 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 287 places, 866 transitions, 16787 flow, removed 80 selfloop flow, removed 6 redundant places. [2024-06-03 19:23:04,374 INFO L231 Difference]: Finished difference. Result has 288 places, 816 transitions, 15514 flow [2024-06-03 19:23:04,374 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} [2024-06-03 19:23:04,375 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 243 predicate places. [2024-06-03 19:23:04,375 INFO L495 AbstractCegarLoop]: Abstraction has has 288 places, 816 transitions, 15514 flow [2024-06-03 19:23:04,375 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) [2024-06-03 19:23:04,375 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:23:04,375 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:23:04,375 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2024-06-03 19:23:04,375 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)] === [2024-06-03 19:23:04,376 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:23:04,376 INFO L85 PathProgramCache]: Analyzing trace with hash -1402677241, now seen corresponding path program 1 times [2024-06-03 19:23:04,376 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:23:04,376 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [769897849] [2024-06-03 19:23:04,376 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:23:04,376 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:23:04,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:23:05,005 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:23:05,006 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:23:05,006 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [769897849] [2024-06-03 19:23:05,006 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [769897849] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:23:05,006 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:23:05,006 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 19:23:05,006 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [90054971] [2024-06-03 19:23:05,006 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:23:05,006 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 19:23:05,006 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:23:05,007 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 19:23:05,008 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2024-06-03 19:23:05,059 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 44 [2024-06-03 19:23:05,059 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) [2024-06-03 19:23:05,059 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:23:05,060 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 44 [2024-06-03 19:23:05,060 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:23:07,158 INFO L124 PetriNetUnfolderBase]: 5508/8277 cut-off events. [2024-06-03 19:23:07,159 INFO L125 PetriNetUnfolderBase]: For 489339/489507 co-relation queries the response was YES. [2024-06-03 19:23:07,208 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. [2024-06-03 19:23:07,251 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 744 selfloop transitions, 46 changer transitions 0/846 dead transitions. [2024-06-03 19:23:07,251 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 295 places, 846 transitions, 17394 flow [2024-06-03 19:23:07,252 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 19:23:07,252 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 19:23:07,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 149 transitions. [2024-06-03 19:23:07,252 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42329545454545453 [2024-06-03 19:23:07,252 INFO L175 Difference]: Start difference. First operand has 288 places, 816 transitions, 15514 flow. Second operand 8 states and 149 transitions. [2024-06-03 19:23:07,252 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 295 places, 846 transitions, 17394 flow [2024-06-03 19:23:08,045 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 286 places, 846 transitions, 16502 flow, removed 38 selfloop flow, removed 9 redundant places. [2024-06-03 19:23:08,057 INFO L231 Difference]: Finished difference. Result has 287 places, 822 transitions, 14808 flow [2024-06-03 19:23:08,058 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} [2024-06-03 19:23:08,058 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 242 predicate places. [2024-06-03 19:23:08,058 INFO L495 AbstractCegarLoop]: Abstraction has has 287 places, 822 transitions, 14808 flow [2024-06-03 19:23:08,058 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) [2024-06-03 19:23:08,058 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:23:08,058 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:23:08,059 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57 [2024-06-03 19:23:08,059 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)] === [2024-06-03 19:23:08,059 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:23:08,059 INFO L85 PathProgramCache]: Analyzing trace with hash 2067502750, now seen corresponding path program 7 times [2024-06-03 19:23:08,059 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:23:08,059 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [19886230] [2024-06-03 19:23:08,059 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:23:08,060 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:23:08,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:23:09,193 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:23:09,193 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:23:09,194 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [19886230] [2024-06-03 19:23:09,194 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [19886230] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:23:09,194 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:23:09,194 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-03 19:23:09,194 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1178988251] [2024-06-03 19:23:09,194 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:23:09,194 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-03 19:23:09,195 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:23:09,196 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-03 19:23:09,196 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-06-03 19:23:09,490 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-03 19:23:09,491 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) [2024-06-03 19:23:09,491 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:23:09,491 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-03 19:23:09,491 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:23:11,921 INFO L124 PetriNetUnfolderBase]: 5090/7789 cut-off events. [2024-06-03 19:23:11,921 INFO L125 PetriNetUnfolderBase]: For 456038/456079 co-relation queries the response was YES. [2024-06-03 19:23:11,973 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. [2024-06-03 19:23:12,012 INFO L140 encePairwiseOnDemand]: 29/44 looper letters, 731 selfloop transitions, 143 changer transitions 0/894 dead transitions. [2024-06-03 19:23:12,012 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 298 places, 894 transitions, 17161 flow [2024-06-03 19:23:12,013 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-03 19:23:12,013 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-03 19:23:12,013 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 233 transitions. [2024-06-03 19:23:12,013 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4412878787878788 [2024-06-03 19:23:12,013 INFO L175 Difference]: Start difference. First operand has 287 places, 822 transitions, 14808 flow. Second operand 12 states and 233 transitions. [2024-06-03 19:23:12,013 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 298 places, 894 transitions, 17161 flow [2024-06-03 19:23:12,937 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 295 places, 894 transitions, 17091 flow, removed 21 selfloop flow, removed 3 redundant places. [2024-06-03 19:23:12,950 INFO L231 Difference]: Finished difference. Result has 297 places, 849 transitions, 15498 flow [2024-06-03 19:23:12,951 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} [2024-06-03 19:23:12,952 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 252 predicate places. [2024-06-03 19:23:12,952 INFO L495 AbstractCegarLoop]: Abstraction has has 297 places, 849 transitions, 15498 flow [2024-06-03 19:23:12,952 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) [2024-06-03 19:23:12,952 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:23:12,953 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:23:12,953 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58 [2024-06-03 19:23:12,953 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)] === [2024-06-03 19:23:12,953 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:23:12,953 INFO L85 PathProgramCache]: Analyzing trace with hash 2071312030, now seen corresponding path program 8 times [2024-06-03 19:23:12,953 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:23:12,954 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [970223627] [2024-06-03 19:23:12,954 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:23:12,954 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:23:12,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:23:14,157 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:23:14,157 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:23:14,157 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [970223627] [2024-06-03 19:23:14,157 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [970223627] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:23:14,158 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:23:14,158 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-03 19:23:14,158 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1462881976] [2024-06-03 19:23:14,158 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:23:14,158 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-03 19:23:14,158 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:23:14,158 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-03 19:23:14,159 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2024-06-03 19:23:14,302 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-03 19:23:14,303 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) [2024-06-03 19:23:14,303 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:23:14,303 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-03 19:23:14,303 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:23:16,483 INFO L124 PetriNetUnfolderBase]: 5138/7848 cut-off events. [2024-06-03 19:23:16,483 INFO L125 PetriNetUnfolderBase]: For 475734/475775 co-relation queries the response was YES. [2024-06-03 19:23:16,541 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. [2024-06-03 19:23:16,583 INFO L140 encePairwiseOnDemand]: 28/44 looper letters, 413 selfloop transitions, 480 changer transitions 0/913 dead transitions. [2024-06-03 19:23:16,584 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 307 places, 913 transitions, 17877 flow [2024-06-03 19:23:16,584 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-03 19:23:16,584 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-03 19:23:16,585 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 225 transitions. [2024-06-03 19:23:16,585 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46487603305785125 [2024-06-03 19:23:16,585 INFO L175 Difference]: Start difference. First operand has 297 places, 849 transitions, 15498 flow. Second operand 11 states and 225 transitions. [2024-06-03 19:23:16,585 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 307 places, 913 transitions, 17877 flow [2024-06-03 19:23:17,562 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 300 places, 913 transitions, 17571 flow, removed 48 selfloop flow, removed 7 redundant places. [2024-06-03 19:23:17,576 INFO L231 Difference]: Finished difference. Result has 301 places, 858 transitions, 16313 flow [2024-06-03 19:23:17,576 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} [2024-06-03 19:23:17,576 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 256 predicate places. [2024-06-03 19:23:17,577 INFO L495 AbstractCegarLoop]: Abstraction has has 301 places, 858 transitions, 16313 flow [2024-06-03 19:23:17,577 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) [2024-06-03 19:23:17,577 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:23:17,577 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:23:17,577 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59 [2024-06-03 19:23:17,577 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)] === [2024-06-03 19:23:17,577 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:23:17,578 INFO L85 PathProgramCache]: Analyzing trace with hash 1722606798, now seen corresponding path program 9 times [2024-06-03 19:23:17,578 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:23:17,578 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1749738478] [2024-06-03 19:23:17,578 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:23:17,578 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:23:17,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:23:18,866 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:23:18,867 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:23:18,867 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1749738478] [2024-06-03 19:23:18,867 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1749738478] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:23:18,867 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:23:18,867 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-03 19:23:18,867 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2106315668] [2024-06-03 19:23:18,867 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:23:18,867 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-03 19:23:18,868 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:23:18,868 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-03 19:23:18,868 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2024-06-03 19:23:19,033 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-03 19:23:19,037 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) [2024-06-03 19:23:19,038 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:23:19,038 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-03 19:23:19,038 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:23:21,675 INFO L124 PetriNetUnfolderBase]: 5207/7959 cut-off events. [2024-06-03 19:23:21,675 INFO L125 PetriNetUnfolderBase]: For 505151/505196 co-relation queries the response was YES. [2024-06-03 19:23:21,720 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. [2024-06-03 19:23:21,763 INFO L140 encePairwiseOnDemand]: 28/44 looper letters, 445 selfloop transitions, 464 changer transitions 0/929 dead transitions. [2024-06-03 19:23:21,763 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 311 places, 929 transitions, 18878 flow [2024-06-03 19:23:21,764 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-03 19:23:21,764 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-03 19:23:21,765 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 225 transitions. [2024-06-03 19:23:21,766 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46487603305785125 [2024-06-03 19:23:21,767 INFO L175 Difference]: Start difference. First operand has 301 places, 858 transitions, 16313 flow. Second operand 11 states and 225 transitions. [2024-06-03 19:23:21,767 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 311 places, 929 transitions, 18878 flow [2024-06-03 19:23:22,712 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 302 places, 929 transitions, 17863 flow, removed 35 selfloop flow, removed 9 redundant places. [2024-06-03 19:23:22,726 INFO L231 Difference]: Finished difference. Result has 303 places, 864 transitions, 16361 flow [2024-06-03 19:23:22,727 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} [2024-06-03 19:23:22,727 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 258 predicate places. [2024-06-03 19:23:22,728 INFO L495 AbstractCegarLoop]: Abstraction has has 303 places, 864 transitions, 16361 flow [2024-06-03 19:23:22,728 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) [2024-06-03 19:23:22,728 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:23:22,728 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:23:22,728 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60 [2024-06-03 19:23:22,728 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)] === [2024-06-03 19:23:22,728 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:23:22,729 INFO L85 PathProgramCache]: Analyzing trace with hash 1722822279, now seen corresponding path program 2 times [2024-06-03 19:23:22,729 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:23:22,729 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [107075965] [2024-06-03 19:23:22,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:23:22,729 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:23:22,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:23:23,873 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:23:23,874 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:23:23,874 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [107075965] [2024-06-03 19:23:23,874 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [107075965] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:23:23,874 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:23:23,874 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 19:23:23,874 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [896790238] [2024-06-03 19:23:23,874 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:23:23,874 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 19:23:23,874 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:23:23,874 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 19:23:23,875 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2024-06-03 19:23:23,996 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 44 [2024-06-03 19:23:23,996 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) [2024-06-03 19:23:23,996 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:23:23,996 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 44 [2024-06-03 19:23:23,996 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:23:26,650 INFO L124 PetriNetUnfolderBase]: 6221/9236 cut-off events. [2024-06-03 19:23:26,650 INFO L125 PetriNetUnfolderBase]: For 592879/592908 co-relation queries the response was YES. [2024-06-03 19:23:26,716 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. [2024-06-03 19:23:26,777 INFO L140 encePairwiseOnDemand]: 30/44 looper letters, 682 selfloop transitions, 234 changer transitions 0/928 dead transitions. [2024-06-03 19:23:26,778 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 312 places, 928 transitions, 18876 flow [2024-06-03 19:23:26,778 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-03 19:23:26,778 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-03 19:23:26,779 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 193 transitions. [2024-06-03 19:23:26,779 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43863636363636366 [2024-06-03 19:23:26,779 INFO L175 Difference]: Start difference. First operand has 303 places, 864 transitions, 16361 flow. Second operand 10 states and 193 transitions. [2024-06-03 19:23:26,779 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 312 places, 928 transitions, 18876 flow [2024-06-03 19:23:27,998 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 303 places, 928 transitions, 17867 flow, removed 41 selfloop flow, removed 9 redundant places. [2024-06-03 19:23:28,011 INFO L231 Difference]: Finished difference. Result has 306 places, 886 transitions, 16317 flow [2024-06-03 19:23:28,012 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} [2024-06-03 19:23:28,012 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 261 predicate places. [2024-06-03 19:23:28,013 INFO L495 AbstractCegarLoop]: Abstraction has has 306 places, 886 transitions, 16317 flow [2024-06-03 19:23:28,013 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) [2024-06-03 19:23:28,013 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:23:28,013 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:23:28,013 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61 [2024-06-03 19:23:28,013 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)] === [2024-06-03 19:23:28,013 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:23:28,013 INFO L85 PathProgramCache]: Analyzing trace with hash -1206533888, now seen corresponding path program 10 times [2024-06-03 19:23:28,014 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:23:28,014 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [391750731] [2024-06-03 19:23:28,014 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:23:28,014 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:23:28,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:23:29,278 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:23:29,279 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:23:29,279 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [391750731] [2024-06-03 19:23:29,279 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [391750731] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:23:29,279 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:23:29,279 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-03 19:23:29,279 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1866854382] [2024-06-03 19:23:29,279 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:23:29,280 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-03 19:23:29,280 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:23:29,280 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-03 19:23:29,280 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2024-06-03 19:23:29,473 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-03 19:23:29,473 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) [2024-06-03 19:23:29,473 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:23:29,473 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-03 19:23:29,473 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:23:31,961 INFO L124 PetriNetUnfolderBase]: 5283/8075 cut-off events. [2024-06-03 19:23:31,961 INFO L125 PetriNetUnfolderBase]: For 537689/537725 co-relation queries the response was YES. [2024-06-03 19:23:32,023 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. [2024-06-03 19:23:32,068 INFO L140 encePairwiseOnDemand]: 28/44 looper letters, 459 selfloop transitions, 465 changer transitions 0/946 dead transitions. [2024-06-03 19:23:32,068 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 316 places, 946 transitions, 18792 flow [2024-06-03 19:23:32,069 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-03 19:23:32,069 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-03 19:23:32,069 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 222 transitions. [2024-06-03 19:23:32,070 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45867768595041325 [2024-06-03 19:23:32,070 INFO L175 Difference]: Start difference. First operand has 306 places, 886 transitions, 16317 flow. Second operand 11 states and 222 transitions. [2024-06-03 19:23:32,070 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 316 places, 946 transitions, 18792 flow [2024-06-03 19:23:33,218 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 312 places, 946 transitions, 18435 flow, removed 72 selfloop flow, removed 4 redundant places. [2024-06-03 19:23:33,232 INFO L231 Difference]: Finished difference. Result has 313 places, 889 transitions, 17010 flow [2024-06-03 19:23:33,233 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} [2024-06-03 19:23:33,233 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 268 predicate places. [2024-06-03 19:23:33,233 INFO L495 AbstractCegarLoop]: Abstraction has has 313 places, 889 transitions, 17010 flow [2024-06-03 19:23:33,233 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) [2024-06-03 19:23:33,233 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:23:33,234 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:23:33,234 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62 [2024-06-03 19:23:33,234 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)] === [2024-06-03 19:23:33,234 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:23:33,234 INFO L85 PathProgramCache]: Analyzing trace with hash -1027329961, now seen corresponding path program 3 times [2024-06-03 19:23:33,234 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:23:33,234 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1524443028] [2024-06-03 19:23:33,235 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:23:33,235 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:23:33,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:23:34,279 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:23:34,279 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:23:34,279 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1524443028] [2024-06-03 19:23:34,279 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1524443028] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:23:34,280 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:23:34,280 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 19:23:34,280 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [123158495] [2024-06-03 19:23:34,280 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:23:34,280 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 19:23:34,280 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:23:34,284 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 19:23:34,284 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2024-06-03 19:23:34,374 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 44 [2024-06-03 19:23:34,374 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) [2024-06-03 19:23:34,374 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:23:34,374 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 44 [2024-06-03 19:23:34,374 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:23:36,854 INFO L124 PetriNetUnfolderBase]: 6328/9397 cut-off events. [2024-06-03 19:23:36,855 INFO L125 PetriNetUnfolderBase]: For 645064/645092 co-relation queries the response was YES. [2024-06-03 19:23:36,924 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. [2024-06-03 19:23:36,974 INFO L140 encePairwiseOnDemand]: 30/44 looper letters, 704 selfloop transitions, 240 changer transitions 0/956 dead transitions. [2024-06-03 19:23:36,974 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 322 places, 956 transitions, 19774 flow [2024-06-03 19:23:36,975 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-03 19:23:36,975 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-03 19:23:36,975 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 194 transitions. [2024-06-03 19:23:36,975 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4409090909090909 [2024-06-03 19:23:36,976 INFO L175 Difference]: Start difference. First operand has 313 places, 889 transitions, 17010 flow. Second operand 10 states and 194 transitions. [2024-06-03 19:23:36,976 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 322 places, 956 transitions, 19774 flow [2024-06-03 19:23:38,258 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 313 places, 956 transitions, 18718 flow, removed 49 selfloop flow, removed 9 redundant places. [2024-06-03 19:23:38,272 INFO L231 Difference]: Finished difference. Result has 315 places, 910 transitions, 17006 flow [2024-06-03 19:23:38,272 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} [2024-06-03 19:23:38,272 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 270 predicate places. [2024-06-03 19:23:38,273 INFO L495 AbstractCegarLoop]: Abstraction has has 315 places, 910 transitions, 17006 flow [2024-06-03 19:23:38,273 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) [2024-06-03 19:23:38,273 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:23:38,273 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:23:38,273 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63 [2024-06-03 19:23:38,273 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)] === [2024-06-03 19:23:38,273 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:23:38,274 INFO L85 PathProgramCache]: Analyzing trace with hash -1020180121, now seen corresponding path program 4 times [2024-06-03 19:23:38,274 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:23:38,274 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1695494860] [2024-06-03 19:23:38,274 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:23:38,274 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:23:38,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:23:39,377 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:23:39,377 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:23:39,377 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1695494860] [2024-06-03 19:23:39,377 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1695494860] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:23:39,377 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:23:39,377 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 19:23:39,377 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [324037293] [2024-06-03 19:23:39,377 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:23:39,378 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 19:23:39,378 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:23:39,378 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 19:23:39,378 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2024-06-03 19:23:39,489 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 44 [2024-06-03 19:23:39,490 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) [2024-06-03 19:23:39,490 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:23:39,490 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 44 [2024-06-03 19:23:39,490 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:23:42,094 INFO L124 PetriNetUnfolderBase]: 6345/9423 cut-off events. [2024-06-03 19:23:42,095 INFO L125 PetriNetUnfolderBase]: For 659792/659820 co-relation queries the response was YES. [2024-06-03 19:23:42,166 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. [2024-06-03 19:23:42,218 INFO L140 encePairwiseOnDemand]: 30/44 looper letters, 702 selfloop transitions, 248 changer transitions 0/962 dead transitions. [2024-06-03 19:23:42,219 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 324 places, 962 transitions, 19491 flow [2024-06-03 19:23:42,219 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-03 19:23:42,219 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-03 19:23:42,220 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 192 transitions. [2024-06-03 19:23:42,220 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43636363636363634 [2024-06-03 19:23:42,220 INFO L175 Difference]: Start difference. First operand has 315 places, 910 transitions, 17006 flow. Second operand 10 states and 192 transitions. [2024-06-03 19:23:42,220 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 324 places, 962 transitions, 19491 flow [2024-06-03 19:23:43,716 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 318 places, 962 transitions, 19021 flow, removed 41 selfloop flow, removed 6 redundant places. [2024-06-03 19:23:43,733 INFO L231 Difference]: Finished difference. Result has 319 places, 918 transitions, 17293 flow [2024-06-03 19:23:43,733 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} [2024-06-03 19:23:43,735 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 274 predicate places. [2024-06-03 19:23:43,735 INFO L495 AbstractCegarLoop]: Abstraction has has 319 places, 918 transitions, 17293 flow [2024-06-03 19:23:43,735 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) [2024-06-03 19:23:43,735 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:23:43,735 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:23:43,735 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64 [2024-06-03 19:23:43,736 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)] === [2024-06-03 19:23:43,736 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:23:43,737 INFO L85 PathProgramCache]: Analyzing trace with hash -1019911351, now seen corresponding path program 5 times [2024-06-03 19:23:43,737 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:23:43,737 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [163497] [2024-06-03 19:23:43,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:23:43,737 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:23:43,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:23:44,894 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:23:44,894 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:23:44,894 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [163497] [2024-06-03 19:23:44,894 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [163497] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:23:44,894 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:23:44,895 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 19:23:44,895 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1723473731] [2024-06-03 19:23:44,895 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:23:44,895 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 19:23:44,895 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:23:44,895 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 19:23:44,895 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-03 19:23:45,030 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 44 [2024-06-03 19:23:45,031 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) [2024-06-03 19:23:45,031 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:23:45,031 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 44 [2024-06-03 19:23:45,031 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:23:47,529 INFO L124 PetriNetUnfolderBase]: 6370/9459 cut-off events. [2024-06-03 19:23:47,529 INFO L125 PetriNetUnfolderBase]: For 687130/687158 co-relation queries the response was YES. [2024-06-03 19:23:47,618 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. [2024-06-03 19:23:47,675 INFO L140 encePairwiseOnDemand]: 30/44 looper letters, 694 selfloop transitions, 256 changer transitions 0/962 dead transitions. [2024-06-03 19:23:47,675 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 328 places, 962 transitions, 19583 flow [2024-06-03 19:23:47,676 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-03 19:23:47,676 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-03 19:23:47,676 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 192 transitions. [2024-06-03 19:23:47,677 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43636363636363634 [2024-06-03 19:23:47,677 INFO L175 Difference]: Start difference. First operand has 319 places, 918 transitions, 17293 flow. Second operand 10 states and 192 transitions. [2024-06-03 19:23:47,677 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 328 places, 962 transitions, 19583 flow [2024-06-03 19:23:49,134 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 322 places, 962 transitions, 19075 flow, removed 36 selfloop flow, removed 6 redundant places. [2024-06-03 19:23:49,148 INFO L231 Difference]: Finished difference. Result has 323 places, 920 transitions, 17388 flow [2024-06-03 19:23:49,149 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} [2024-06-03 19:23:49,149 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 278 predicate places. [2024-06-03 19:23:49,149 INFO L495 AbstractCegarLoop]: Abstraction has has 323 places, 920 transitions, 17388 flow [2024-06-03 19:23:49,149 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) [2024-06-03 19:23:49,149 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:23:49,150 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:23:49,150 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65 [2024-06-03 19:23:49,150 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)] === [2024-06-03 19:23:49,150 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:23:49,150 INFO L85 PathProgramCache]: Analyzing trace with hash -1318125135, now seen corresponding path program 2 times [2024-06-03 19:23:49,150 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:23:49,150 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [210995103] [2024-06-03 19:23:49,150 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:23:49,151 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:23:49,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:23:49,837 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:23:49,838 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:23:49,838 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [210995103] [2024-06-03 19:23:49,838 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [210995103] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:23:49,838 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:23:49,838 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 19:23:49,838 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [886861695] [2024-06-03 19:23:49,838 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:23:49,838 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 19:23:49,839 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:23:49,839 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 19:23:49,839 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2024-06-03 19:23:49,911 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 44 [2024-06-03 19:23:49,912 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) [2024-06-03 19:23:49,912 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:23:49,912 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 44 [2024-06-03 19:23:49,912 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:23:52,289 INFO L124 PetriNetUnfolderBase]: 5989/8970 cut-off events. [2024-06-03 19:23:52,289 INFO L125 PetriNetUnfolderBase]: For 663979/664148 co-relation queries the response was YES. [2024-06-03 19:23:52,376 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. [2024-06-03 19:23:52,430 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 844 selfloop transitions, 52 changer transitions 0/952 dead transitions. [2024-06-03 19:23:52,431 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 330 places, 952 transitions, 19593 flow [2024-06-03 19:23:52,431 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 19:23:52,431 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 19:23:52,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 151 transitions. [2024-06-03 19:23:52,432 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4289772727272727 [2024-06-03 19:23:52,432 INFO L175 Difference]: Start difference. First operand has 323 places, 920 transitions, 17388 flow. Second operand 8 states and 151 transitions. [2024-06-03 19:23:52,432 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 330 places, 952 transitions, 19593 flow [2024-06-03 19:23:53,863 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 322 places, 952 transitions, 19008 flow, removed 38 selfloop flow, removed 8 redundant places. [2024-06-03 19:23:53,877 INFO L231 Difference]: Finished difference. Result has 323 places, 929 transitions, 17009 flow [2024-06-03 19:23:53,878 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} [2024-06-03 19:23:53,878 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 278 predicate places. [2024-06-03 19:23:53,878 INFO L495 AbstractCegarLoop]: Abstraction has has 323 places, 929 transitions, 17009 flow [2024-06-03 19:23:53,878 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) [2024-06-03 19:23:53,878 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:23:53,878 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:23:53,878 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66 [2024-06-03 19:23:53,879 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)] === [2024-06-03 19:23:53,879 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:23:53,879 INFO L85 PathProgramCache]: Analyzing trace with hash -697028355, now seen corresponding path program 3 times [2024-06-03 19:23:53,879 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:23:53,879 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [717380613] [2024-06-03 19:23:53,879 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:23:53,879 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:23:53,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:23:54,566 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:23:54,567 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:23:54,567 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [717380613] [2024-06-03 19:23:54,567 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [717380613] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:23:54,567 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:23:54,567 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 19:23:54,567 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1644225010] [2024-06-03 19:23:54,567 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:23:54,568 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 19:23:54,568 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:23:54,568 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 19:23:54,568 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2024-06-03 19:23:54,628 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 44 [2024-06-03 19:23:54,628 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) [2024-06-03 19:23:54,629 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:23:54,629 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 44 [2024-06-03 19:23:54,629 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:23:56,886 INFO L124 PetriNetUnfolderBase]: 5977/8959 cut-off events. [2024-06-03 19:23:56,886 INFO L125 PetriNetUnfolderBase]: For 673035/673195 co-relation queries the response was YES. [2024-06-03 19:23:56,957 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. [2024-06-03 19:23:57,006 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 838 selfloop transitions, 54 changer transitions 0/948 dead transitions. [2024-06-03 19:23:57,006 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 330 places, 948 transitions, 18997 flow [2024-06-03 19:23:57,007 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 19:23:57,007 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 19:23:57,007 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 145 transitions. [2024-06-03 19:23:57,007 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4119318181818182 [2024-06-03 19:23:57,007 INFO L175 Difference]: Start difference. First operand has 323 places, 929 transitions, 17009 flow. Second operand 8 states and 145 transitions. [2024-06-03 19:23:57,008 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 330 places, 948 transitions, 18997 flow [2024-06-03 19:23:58,347 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 327 places, 948 transitions, 18904 flow, removed 23 selfloop flow, removed 3 redundant places. [2024-06-03 19:23:58,360 INFO L231 Difference]: Finished difference. Result has 328 places, 929 transitions, 17030 flow [2024-06-03 19:23:58,361 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} [2024-06-03 19:23:58,361 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 283 predicate places. [2024-06-03 19:23:58,361 INFO L495 AbstractCegarLoop]: Abstraction has has 328 places, 929 transitions, 17030 flow [2024-06-03 19:23:58,361 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) [2024-06-03 19:23:58,361 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:23:58,361 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:23:58,361 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67 [2024-06-03 19:23:58,362 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)] === [2024-06-03 19:23:58,362 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:23:58,362 INFO L85 PathProgramCache]: Analyzing trace with hash -727681368, now seen corresponding path program 11 times [2024-06-03 19:23:58,362 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:23:58,362 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [415660378] [2024-06-03 19:23:58,362 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:23:58,362 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:23:58,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:23:59,809 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:23:59,810 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:23:59,810 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [415660378] [2024-06-03 19:23:59,810 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [415660378] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:23:59,810 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:23:59,810 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-03 19:23:59,810 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2041056812] [2024-06-03 19:23:59,811 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:23:59,811 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-03 19:23:59,811 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:23:59,811 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-03 19:23:59,811 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2024-06-03 19:24:00,004 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-03 19:24:00,008 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) [2024-06-03 19:24:00,008 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:24:00,008 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-03 19:24:00,008 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:24:02,291 INFO L124 PetriNetUnfolderBase]: 5501/8378 cut-off events. [2024-06-03 19:24:02,291 INFO L125 PetriNetUnfolderBase]: For 689660/689698 co-relation queries the response was YES. [2024-06-03 19:24:02,355 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. [2024-06-03 19:24:02,401 INFO L140 encePairwiseOnDemand]: 31/44 looper letters, 709 selfloop transitions, 241 changer transitions 0/976 dead transitions. [2024-06-03 19:24:02,401 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 338 places, 976 transitions, 19261 flow [2024-06-03 19:24:02,402 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-03 19:24:02,402 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-03 19:24:02,402 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 217 transitions. [2024-06-03 19:24:02,403 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44834710743801653 [2024-06-03 19:24:02,403 INFO L175 Difference]: Start difference. First operand has 328 places, 929 transitions, 17030 flow. Second operand 11 states and 217 transitions. [2024-06-03 19:24:02,403 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 338 places, 976 transitions, 19261 flow [2024-06-03 19:24:03,764 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 330 places, 976 transitions, 19045 flow, removed 39 selfloop flow, removed 8 redundant places. [2024-06-03 19:24:03,777 INFO L231 Difference]: Finished difference. Result has 331 places, 929 transitions, 17378 flow [2024-06-03 19:24:03,778 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} [2024-06-03 19:24:03,778 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 286 predicate places. [2024-06-03 19:24:03,778 INFO L495 AbstractCegarLoop]: Abstraction has has 331 places, 929 transitions, 17378 flow [2024-06-03 19:24:03,778 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) [2024-06-03 19:24:03,779 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:24:03,779 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:24:03,779 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68 [2024-06-03 19:24:03,779 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)] === [2024-06-03 19:24:03,779 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:24:03,779 INFO L85 PathProgramCache]: Analyzing trace with hash -602624453, now seen corresponding path program 1 times [2024-06-03 19:24:03,779 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:24:03,779 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1032555557] [2024-06-03 19:24:03,780 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:24:03,780 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:24:03,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:24:04,654 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:24:04,655 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:24:04,655 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1032555557] [2024-06-03 19:24:04,655 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1032555557] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:24:04,655 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:24:04,655 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 19:24:04,655 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1062064432] [2024-06-03 19:24:04,655 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:24:04,655 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 19:24:04,655 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:24:04,655 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 19:24:04,656 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2024-06-03 19:24:04,750 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 44 [2024-06-03 19:24:04,751 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) [2024-06-03 19:24:04,751 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:24:04,751 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 44 [2024-06-03 19:24:04,751 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:24:07,239 INFO L124 PetriNetUnfolderBase]: 6031/9035 cut-off events. [2024-06-03 19:24:07,240 INFO L125 PetriNetUnfolderBase]: For 715773/715937 co-relation queries the response was YES. [2024-06-03 19:24:07,322 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. [2024-06-03 19:24:07,370 INFO L140 encePairwiseOnDemand]: 31/44 looper letters, 858 selfloop transitions, 65 changer transitions 0/979 dead transitions. [2024-06-03 19:24:07,370 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 339 places, 979 transitions, 19955 flow [2024-06-03 19:24:07,371 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 19:24:07,371 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 19:24:07,371 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 175 transitions. [2024-06-03 19:24:07,371 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44191919191919193 [2024-06-03 19:24:07,371 INFO L175 Difference]: Start difference. First operand has 331 places, 929 transitions, 17378 flow. Second operand 9 states and 175 transitions. [2024-06-03 19:24:07,371 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 339 places, 979 transitions, 19955 flow [2024-06-03 19:24:08,652 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 330 places, 979 transitions, 19497 flow, removed 27 selfloop flow, removed 9 redundant places. [2024-06-03 19:24:08,666 INFO L231 Difference]: Finished difference. Result has 333 places, 946 transitions, 17372 flow [2024-06-03 19:24:08,666 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} [2024-06-03 19:24:08,667 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 288 predicate places. [2024-06-03 19:24:08,667 INFO L495 AbstractCegarLoop]: Abstraction has has 333 places, 946 transitions, 17372 flow [2024-06-03 19:24:08,667 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) [2024-06-03 19:24:08,667 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:24:08,667 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:24:08,667 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable69 [2024-06-03 19:24:08,667 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)] === [2024-06-03 19:24:08,668 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:24:08,668 INFO L85 PathProgramCache]: Analyzing trace with hash -723872088, now seen corresponding path program 12 times [2024-06-03 19:24:08,668 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:24:08,668 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1746554935] [2024-06-03 19:24:08,668 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:24:08,668 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:24:08,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:24:10,129 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:24:10,129 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:24:10,129 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1746554935] [2024-06-03 19:24:10,129 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1746554935] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:24:10,129 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:24:10,129 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-03 19:24:10,129 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2128978144] [2024-06-03 19:24:10,129 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:24:10,130 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-03 19:24:10,130 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:24:10,130 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-03 19:24:10,130 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2024-06-03 19:24:10,274 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-03 19:24:10,275 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) [2024-06-03 19:24:10,275 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:24:10,275 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-03 19:24:10,275 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:24:12,593 INFO L124 PetriNetUnfolderBase]: 5576/8483 cut-off events. [2024-06-03 19:24:12,593 INFO L125 PetriNetUnfolderBase]: For 687157/687193 co-relation queries the response was YES. [2024-06-03 19:24:12,664 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. [2024-06-03 19:24:12,716 INFO L140 encePairwiseOnDemand]: 31/44 looper letters, 343 selfloop transitions, 639 changer transitions 0/1008 dead transitions. [2024-06-03 19:24:12,716 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 342 places, 1008 transitions, 20306 flow [2024-06-03 19:24:12,717 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-03 19:24:12,717 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-03 19:24:12,717 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 207 transitions. [2024-06-03 19:24:12,717 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47045454545454546 [2024-06-03 19:24:12,717 INFO L175 Difference]: Start difference. First operand has 333 places, 946 transitions, 17372 flow. Second operand 10 states and 207 transitions. [2024-06-03 19:24:12,717 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 342 places, 1008 transitions, 20306 flow [2024-06-03 19:24:14,164 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 339 places, 1008 transitions, 20234 flow, removed 26 selfloop flow, removed 3 redundant places. [2024-06-03 19:24:14,179 INFO L231 Difference]: Finished difference. Result has 341 places, 952 transitions, 19120 flow [2024-06-03 19:24:14,180 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} [2024-06-03 19:24:14,180 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 296 predicate places. [2024-06-03 19:24:14,180 INFO L495 AbstractCegarLoop]: Abstraction has has 341 places, 952 transitions, 19120 flow [2024-06-03 19:24:14,180 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) [2024-06-03 19:24:14,180 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:24:14,181 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:24:14,181 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70 [2024-06-03 19:24:14,181 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)] === [2024-06-03 19:24:14,181 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:24:14,181 INFO L85 PathProgramCache]: Analyzing trace with hash -509871522, now seen corresponding path program 13 times [2024-06-03 19:24:14,181 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:24:14,181 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1159264132] [2024-06-03 19:24:14,181 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:24:14,182 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:24:14,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:24:15,814 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:24:15,815 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:24:15,815 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1159264132] [2024-06-03 19:24:15,815 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1159264132] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:24:15,815 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:24:15,815 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-03 19:24:15,815 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [760998205] [2024-06-03 19:24:15,815 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:24:15,815 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-03 19:24:15,815 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:24:15,815 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-03 19:24:15,815 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2024-06-03 19:24:15,976 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-03 19:24:15,977 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) [2024-06-03 19:24:15,977 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:24:15,977 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-03 19:24:15,977 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:24:18,276 INFO L124 PetriNetUnfolderBase]: 5538/8462 cut-off events. [2024-06-03 19:24:18,276 INFO L125 PetriNetUnfolderBase]: For 693600/693623 co-relation queries the response was YES. [2024-06-03 19:24:18,354 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. [2024-06-03 19:24:18,412 INFO L140 encePairwiseOnDemand]: 30/44 looper letters, 421 selfloop transitions, 576 changer transitions 0/1023 dead transitions. [2024-06-03 19:24:18,413 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 350 places, 1023 transitions, 22085 flow [2024-06-03 19:24:18,413 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-03 19:24:18,414 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-03 19:24:18,414 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 202 transitions. [2024-06-03 19:24:18,414 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4590909090909091 [2024-06-03 19:24:18,414 INFO L175 Difference]: Start difference. First operand has 341 places, 952 transitions, 19120 flow. Second operand 10 states and 202 transitions. [2024-06-03 19:24:18,414 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 350 places, 1023 transitions, 22085 flow [2024-06-03 19:24:19,979 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 344 places, 1023 transitions, 21504 flow, removed 49 selfloop flow, removed 6 redundant places. [2024-06-03 19:24:19,994 INFO L231 Difference]: Finished difference. Result has 345 places, 955 transitions, 19848 flow [2024-06-03 19:24:19,995 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} [2024-06-03 19:24:19,995 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 300 predicate places. [2024-06-03 19:24:19,995 INFO L495 AbstractCegarLoop]: Abstraction has has 345 places, 955 transitions, 19848 flow [2024-06-03 19:24:19,996 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) [2024-06-03 19:24:19,996 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:24:19,996 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:24:19,996 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71 [2024-06-03 19:24:19,996 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)] === [2024-06-03 19:24:19,996 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:24:19,996 INFO L85 PathProgramCache]: Analyzing trace with hash -1938632539, now seen corresponding path program 6 times [2024-06-03 19:24:19,996 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:24:19,997 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [555490532] [2024-06-03 19:24:19,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:24:20,001 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:24:20,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:24:21,604 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:24:21,604 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:24:21,604 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [555490532] [2024-06-03 19:24:21,604 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [555490532] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:24:21,604 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:24:21,604 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-03 19:24:21,604 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1841472088] [2024-06-03 19:24:21,605 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:24:21,605 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-03 19:24:21,605 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:24:21,605 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-03 19:24:21,605 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2024-06-03 19:24:21,769 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 44 [2024-06-03 19:24:21,769 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) [2024-06-03 19:24:21,769 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:24:21,769 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 44 [2024-06-03 19:24:21,769 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:24:24,296 INFO L124 PetriNetUnfolderBase]: 6520/9675 cut-off events. [2024-06-03 19:24:24,296 INFO L125 PetriNetUnfolderBase]: For 805017/805052 co-relation queries the response was YES. [2024-06-03 19:24:24,385 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. [2024-06-03 19:24:24,443 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 715 selfloop transitions, 273 changer transitions 0/1003 dead transitions. [2024-06-03 19:24:24,444 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 353 places, 1003 transitions, 22438 flow [2024-06-03 19:24:24,444 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 19:24:24,452 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 19:24:24,453 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 173 transitions. [2024-06-03 19:24:24,453 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43686868686868685 [2024-06-03 19:24:24,453 INFO L175 Difference]: Start difference. First operand has 345 places, 955 transitions, 19848 flow. Second operand 9 states and 173 transitions. [2024-06-03 19:24:24,453 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 353 places, 1003 transitions, 22438 flow [2024-06-03 19:24:26,821 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 345 places, 1003 transitions, 21203 flow, removed 51 selfloop flow, removed 8 redundant places. [2024-06-03 19:24:26,836 INFO L231 Difference]: Finished difference. Result has 347 places, 962 transitions, 19431 flow [2024-06-03 19:24:26,837 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} [2024-06-03 19:24:26,837 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 302 predicate places. [2024-06-03 19:24:26,838 INFO L495 AbstractCegarLoop]: Abstraction has has 347 places, 962 transitions, 19431 flow [2024-06-03 19:24:26,838 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) [2024-06-03 19:24:26,838 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:24:26,838 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:24:26,838 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72 [2024-06-03 19:24:26,838 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)] === [2024-06-03 19:24:26,839 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:24:26,839 INFO L85 PathProgramCache]: Analyzing trace with hash 880382263, now seen corresponding path program 7 times [2024-06-03 19:24:26,839 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:24:26,839 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1048774989] [2024-06-03 19:24:26,839 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:24:26,839 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:24:26,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:24:28,361 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:24:28,361 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:24:28,361 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1048774989] [2024-06-03 19:24:28,362 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1048774989] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:24:28,362 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:24:28,363 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-03 19:24:28,363 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1301820925] [2024-06-03 19:24:28,363 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:24:28,363 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-03 19:24:28,363 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:24:28,363 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-03 19:24:28,364 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2024-06-03 19:24:28,492 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 44 [2024-06-03 19:24:28,493 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) [2024-06-03 19:24:28,493 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:24:28,493 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 44 [2024-06-03 19:24:28,493 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:24:31,715 INFO L124 PetriNetUnfolderBase]: 6582/9780 cut-off events. [2024-06-03 19:24:31,716 INFO L125 PetriNetUnfolderBase]: For 813944/813972 co-relation queries the response was YES. [2024-06-03 19:24:31,793 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. [2024-06-03 19:24:31,850 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 742 selfloop transitions, 280 changer transitions 0/1037 dead transitions. [2024-06-03 19:24:31,850 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 355 places, 1037 transitions, 22734 flow [2024-06-03 19:24:31,851 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 19:24:31,851 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 19:24:31,851 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 171 transitions. [2024-06-03 19:24:31,852 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4318181818181818 [2024-06-03 19:24:31,852 INFO L175 Difference]: Start difference. First operand has 347 places, 962 transitions, 19431 flow. Second operand 9 states and 171 transitions. [2024-06-03 19:24:31,852 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 355 places, 1037 transitions, 22734 flow [2024-06-03 19:24:33,945 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 349 places, 1037 transitions, 22068 flow, removed 49 selfloop flow, removed 6 redundant places. [2024-06-03 19:24:33,969 INFO L231 Difference]: Finished difference. Result has 351 places, 989 transitions, 20127 flow [2024-06-03 19:24:33,970 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} [2024-06-03 19:24:33,971 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 306 predicate places. [2024-06-03 19:24:33,971 INFO L495 AbstractCegarLoop]: Abstraction has has 351 places, 989 transitions, 20127 flow [2024-06-03 19:24:33,971 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) [2024-06-03 19:24:33,971 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:24:33,971 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:24:33,971 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73 [2024-06-03 19:24:33,971 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)] === [2024-06-03 19:24:33,972 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:24:33,972 INFO L85 PathProgramCache]: Analyzing trace with hash -886413245, now seen corresponding path program 8 times [2024-06-03 19:24:33,972 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:24:33,972 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [528771336] [2024-06-03 19:24:33,972 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:24:33,972 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:24:33,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:24:35,567 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:24:35,568 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:24:35,568 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [528771336] [2024-06-03 19:24:35,568 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [528771336] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:24:35,568 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:24:35,568 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-03 19:24:35,568 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [125102886] [2024-06-03 19:24:35,569 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:24:35,569 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-03 19:24:35,569 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:24:35,569 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-03 19:24:35,569 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2024-06-03 19:24:35,690 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 44 [2024-06-03 19:24:35,690 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) [2024-06-03 19:24:35,690 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:24:35,690 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 44 [2024-06-03 19:24:35,690 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:24:38,484 INFO L124 PetriNetUnfolderBase]: 6599/9812 cut-off events. [2024-06-03 19:24:38,484 INFO L125 PetriNetUnfolderBase]: For 833946/833974 co-relation queries the response was YES. [2024-06-03 19:24:38,569 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. [2024-06-03 19:24:38,629 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 749 selfloop transitions, 278 changer transitions 0/1042 dead transitions. [2024-06-03 19:24:38,629 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 359 places, 1042 transitions, 22832 flow [2024-06-03 19:24:38,630 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 19:24:38,630 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 19:24:38,630 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 173 transitions. [2024-06-03 19:24:38,630 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43686868686868685 [2024-06-03 19:24:38,630 INFO L175 Difference]: Start difference. First operand has 351 places, 989 transitions, 20127 flow. Second operand 9 states and 173 transitions. [2024-06-03 19:24:38,630 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 359 places, 1042 transitions, 22832 flow [2024-06-03 19:24:41,241 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 355 places, 1042 transitions, 22397 flow, removed 49 selfloop flow, removed 4 redundant places. [2024-06-03 19:24:41,256 INFO L231 Difference]: Finished difference. Result has 356 places, 991 transitions, 20370 flow [2024-06-03 19:24:41,256 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} [2024-06-03 19:24:41,257 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 311 predicate places. [2024-06-03 19:24:41,257 INFO L495 AbstractCegarLoop]: Abstraction has has 356 places, 991 transitions, 20370 flow [2024-06-03 19:24:41,257 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) [2024-06-03 19:24:41,257 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:24:41,257 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:24:41,257 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74 [2024-06-03 19:24:41,257 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)] === [2024-06-03 19:24:41,258 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:24:41,258 INFO L85 PathProgramCache]: Analyzing trace with hash -878994635, now seen corresponding path program 9 times [2024-06-03 19:24:41,258 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:24:41,259 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [369705347] [2024-06-03 19:24:41,259 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:24:41,259 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:24:41,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:24:42,883 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:24:42,883 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:24:42,883 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [369705347] [2024-06-03 19:24:42,884 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [369705347] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:24:42,884 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:24:42,884 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-03 19:24:42,884 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [406242979] [2024-06-03 19:24:42,884 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:24:42,884 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-03 19:24:42,884 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:24:42,885 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-03 19:24:42,885 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2024-06-03 19:24:43,045 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 44 [2024-06-03 19:24:43,045 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) [2024-06-03 19:24:43,045 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:24:43,045 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 44 [2024-06-03 19:24:43,045 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:24:46,424 INFO L124 PetriNetUnfolderBase]: 6624/9845 cut-off events. [2024-06-03 19:24:46,424 INFO L125 PetriNetUnfolderBase]: For 860397/860425 co-relation queries the response was YES. [2024-06-03 19:24:46,491 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. [2024-06-03 19:24:46,545 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 730 selfloop transitions, 291 changer transitions 0/1036 dead transitions. [2024-06-03 19:24:46,545 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 364 places, 1036 transitions, 22948 flow [2024-06-03 19:24:46,548 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 19:24:46,548 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 19:24:46,548 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 171 transitions. [2024-06-03 19:24:46,548 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4318181818181818 [2024-06-03 19:24:46,549 INFO L175 Difference]: Start difference. First operand has 356 places, 991 transitions, 20370 flow. Second operand 9 states and 171 transitions. [2024-06-03 19:24:46,549 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 364 places, 1036 transitions, 22948 flow [2024-06-03 19:24:48,469 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 356 places, 1036 transitions, 22262 flow, removed 47 selfloop flow, removed 8 redundant places. [2024-06-03 19:24:48,483 INFO L231 Difference]: Finished difference. Result has 357 places, 993 transitions, 20382 flow [2024-06-03 19:24:48,484 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} [2024-06-03 19:24:48,484 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 312 predicate places. [2024-06-03 19:24:48,484 INFO L495 AbstractCegarLoop]: Abstraction has has 357 places, 993 transitions, 20382 flow [2024-06-03 19:24:48,485 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) [2024-06-03 19:24:48,485 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:24:48,485 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:24:48,485 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75 [2024-06-03 19:24:48,485 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)] === [2024-06-03 19:24:48,485 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:24:48,485 INFO L85 PathProgramCache]: Analyzing trace with hash -886628726, now seen corresponding path program 14 times [2024-06-03 19:24:48,486 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:24:48,486 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [779317902] [2024-06-03 19:24:48,486 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:24:48,486 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:24:48,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:24:49,935 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:24:49,935 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:24:49,935 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [779317902] [2024-06-03 19:24:49,935 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [779317902] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:24:49,936 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:24:49,936 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-03 19:24:49,936 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [607702456] [2024-06-03 19:24:49,936 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:24:49,936 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-03 19:24:49,936 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:24:49,937 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-03 19:24:49,937 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2024-06-03 19:24:50,115 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-03 19:24:50,115 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) [2024-06-03 19:24:50,115 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:24:50,115 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-03 19:24:50,115 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:24:53,201 INFO L124 PetriNetUnfolderBase]: 5699/8703 cut-off events. [2024-06-03 19:24:53,201 INFO L125 PetriNetUnfolderBase]: For 791157/791157 co-relation queries the response was YES. [2024-06-03 19:24:53,274 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. [2024-06-03 19:24:53,338 INFO L140 encePairwiseOnDemand]: 31/44 looper letters, 449 selfloop transitions, 592 changer transitions 0/1069 dead transitions. [2024-06-03 19:24:53,339 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 366 places, 1069 transitions, 23702 flow [2024-06-03 19:24:53,339 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-03 19:24:53,340 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-03 19:24:53,340 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 203 transitions. [2024-06-03 19:24:53,340 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46136363636363636 [2024-06-03 19:24:53,340 INFO L175 Difference]: Start difference. First operand has 357 places, 993 transitions, 20382 flow. Second operand 10 states and 203 transitions. [2024-06-03 19:24:53,340 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 366 places, 1069 transitions, 23702 flow [2024-06-03 19:24:55,074 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 359 places, 1069 transitions, 23032 flow, removed 47 selfloop flow, removed 7 redundant places. [2024-06-03 19:24:55,091 INFO L231 Difference]: Finished difference. Result has 360 places, 996 transitions, 21058 flow [2024-06-03 19:24:55,092 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} [2024-06-03 19:24:55,092 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 315 predicate places. [2024-06-03 19:24:55,092 INFO L495 AbstractCegarLoop]: Abstraction has has 360 places, 996 transitions, 21058 flow [2024-06-03 19:24:55,093 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) [2024-06-03 19:24:55,093 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:24:55,093 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:24:55,093 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76 [2024-06-03 19:24:55,093 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)] === [2024-06-03 19:24:55,093 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:24:55,093 INFO L85 PathProgramCache]: Analyzing trace with hash -1880970305, now seen corresponding path program 4 times [2024-06-03 19:24:55,093 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:24:55,094 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1019288782] [2024-06-03 19:24:55,094 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:24:55,094 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:24:55,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:24:56,166 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:24:56,166 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:24:56,166 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1019288782] [2024-06-03 19:24:56,166 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1019288782] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:24:56,167 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:24:56,167 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 19:24:56,167 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [154101043] [2024-06-03 19:24:56,167 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:24:56,167 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 19:24:56,167 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:24:56,167 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 19:24:56,167 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-03 19:24:56,245 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 44 [2024-06-03 19:24:56,245 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) [2024-06-03 19:24:56,245 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:24:56,245 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 44 [2024-06-03 19:24:56,245 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:24:59,078 INFO L124 PetriNetUnfolderBase]: 6260/9389 cut-off events. [2024-06-03 19:24:59,078 INFO L125 PetriNetUnfolderBase]: For 857912/858089 co-relation queries the response was YES. [2024-06-03 19:24:59,161 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. [2024-06-03 19:24:59,231 INFO L140 encePairwiseOnDemand]: 35/44 looper letters, 905 selfloop transitions, 58 changer transitions 0/1019 dead transitions. [2024-06-03 19:24:59,232 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 366 places, 1019 transitions, 23273 flow [2024-06-03 19:24:59,232 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 19:24:59,232 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 19:24:59,232 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 132 transitions. [2024-06-03 19:24:59,233 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42857142857142855 [2024-06-03 19:24:59,233 INFO L175 Difference]: Start difference. First operand has 360 places, 996 transitions, 21058 flow. Second operand 7 states and 132 transitions. [2024-06-03 19:24:59,233 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 366 places, 1019 transitions, 23273 flow [2024-06-03 19:25:01,315 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 359 places, 1019 transitions, 22141 flow, removed 61 selfloop flow, removed 7 redundant places. [2024-06-03 19:25:01,329 INFO L231 Difference]: Finished difference. Result has 360 places, 999 transitions, 20109 flow [2024-06-03 19:25:01,330 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} [2024-06-03 19:25:01,330 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 315 predicate places. [2024-06-03 19:25:01,330 INFO L495 AbstractCegarLoop]: Abstraction has has 360 places, 999 transitions, 20109 flow [2024-06-03 19:25:01,330 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) [2024-06-03 19:25:01,331 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:25:01,331 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:25:01,331 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77 [2024-06-03 19:25:01,331 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)] === [2024-06-03 19:25:01,331 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:25:01,331 INFO L85 PathProgramCache]: Analyzing trace with hash -1880612255, now seen corresponding path program 5 times [2024-06-03 19:25:01,331 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:25:01,332 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1540174994] [2024-06-03 19:25:01,332 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:25:01,332 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:25:01,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:25:02,381 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:25:02,381 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:25:02,381 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1540174994] [2024-06-03 19:25:02,381 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1540174994] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:25:02,381 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:25:02,381 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 19:25:02,382 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1057595276] [2024-06-03 19:25:02,382 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:25:02,382 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 19:25:02,382 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:25:02,382 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 19:25:02,382 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-03 19:25:02,455 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 44 [2024-06-03 19:25:02,456 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) [2024-06-03 19:25:02,456 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:25:02,456 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 44 [2024-06-03 19:25:02,456 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:25:05,223 INFO L124 PetriNetUnfolderBase]: 6254/9378 cut-off events. [2024-06-03 19:25:05,224 INFO L125 PetriNetUnfolderBase]: For 858996/859151 co-relation queries the response was YES. [2024-06-03 19:25:05,299 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. [2024-06-03 19:25:05,362 INFO L140 encePairwiseOnDemand]: 35/44 looper letters, 902 selfloop transitions, 59 changer transitions 0/1017 dead transitions. [2024-06-03 19:25:05,363 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 366 places, 1017 transitions, 22292 flow [2024-06-03 19:25:05,363 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 19:25:05,363 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 19:25:05,363 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 127 transitions. [2024-06-03 19:25:05,364 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41233766233766234 [2024-06-03 19:25:05,364 INFO L175 Difference]: Start difference. First operand has 360 places, 999 transitions, 20109 flow. Second operand 7 states and 127 transitions. [2024-06-03 19:25:05,364 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 366 places, 1017 transitions, 22292 flow [2024-06-03 19:25:07,629 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 359 places, 1017 transitions, 22149 flow, removed 17 selfloop flow, removed 7 redundant places. [2024-06-03 19:25:07,643 INFO L231 Difference]: Finished difference. Result has 360 places, 1002 transitions, 20151 flow [2024-06-03 19:25:07,644 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} [2024-06-03 19:25:07,644 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 315 predicate places. [2024-06-03 19:25:07,644 INFO L495 AbstractCegarLoop]: Abstraction has has 360 places, 1002 transitions, 20151 flow [2024-06-03 19:25:07,644 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) [2024-06-03 19:25:07,644 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:25:07,645 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:25:07,645 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78 [2024-06-03 19:25:07,645 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)] === [2024-06-03 19:25:07,645 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:25:07,645 INFO L85 PathProgramCache]: Analyzing trace with hash 437626775, now seen corresponding path program 10 times [2024-06-03 19:25:07,645 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:25:07,645 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [250499777] [2024-06-03 19:25:07,646 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:25:07,646 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:25:07,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:25:08,740 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:25:08,740 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:25:08,740 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [250499777] [2024-06-03 19:25:08,740 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [250499777] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:25:08,740 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:25:08,740 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-03 19:25:08,741 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1477358922] [2024-06-03 19:25:08,741 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:25:08,741 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-03 19:25:08,741 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:25:08,741 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-03 19:25:08,741 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2024-06-03 19:25:08,951 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 44 [2024-06-03 19:25:08,952 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) [2024-06-03 19:25:08,952 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:25:08,952 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 44 [2024-06-03 19:25:08,952 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:25:12,214 INFO L124 PetriNetUnfolderBase]: 6679/9929 cut-off events. [2024-06-03 19:25:12,214 INFO L125 PetriNetUnfolderBase]: For 900844/900858 co-relation queries the response was YES. [2024-06-03 19:25:12,288 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. [2024-06-03 19:25:12,356 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 996 selfloop transitions, 20 changer transitions 0/1033 dead transitions. [2024-06-03 19:25:12,357 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 368 places, 1033 transitions, 22495 flow [2024-06-03 19:25:12,358 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 19:25:12,358 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 19:25:12,358 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 159 transitions. [2024-06-03 19:25:12,359 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4015151515151515 [2024-06-03 19:25:12,359 INFO L175 Difference]: Start difference. First operand has 360 places, 1002 transitions, 20151 flow. Second operand 9 states and 159 transitions. [2024-06-03 19:25:12,359 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 368 places, 1033 transitions, 22495 flow [2024-06-03 19:25:14,888 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 363 places, 1033 transitions, 22383 flow, removed 14 selfloop flow, removed 5 redundant places. [2024-06-03 19:25:14,903 INFO L231 Difference]: Finished difference. Result has 364 places, 1004 transitions, 20198 flow [2024-06-03 19:25:14,903 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} [2024-06-03 19:25:14,904 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 319 predicate places. [2024-06-03 19:25:14,904 INFO L495 AbstractCegarLoop]: Abstraction has has 364 places, 1004 transitions, 20198 flow [2024-06-03 19:25:14,904 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) [2024-06-03 19:25:14,904 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:25:14,904 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:25:14,904 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79 [2024-06-03 19:25:14,904 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)] === [2024-06-03 19:25:14,905 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:25:14,905 INFO L85 PathProgramCache]: Analyzing trace with hash 426584885, now seen corresponding path program 11 times [2024-06-03 19:25:14,905 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:25:14,905 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1920092266] [2024-06-03 19:25:14,905 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:25:14,905 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:25:14,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:25:16,197 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:25:16,198 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:25:16,198 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1920092266] [2024-06-03 19:25:16,198 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1920092266] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:25:16,198 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:25:16,198 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-03 19:25:16,198 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [396779369] [2024-06-03 19:25:16,198 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:25:16,202 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-03 19:25:16,202 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:25:16,202 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-03 19:25:16,203 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2024-06-03 19:25:16,309 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 44 [2024-06-03 19:25:16,309 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) [2024-06-03 19:25:16,309 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:25:16,310 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 44 [2024-06-03 19:25:16,310 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:25:19,575 INFO L124 PetriNetUnfolderBase]: 6720/9994 cut-off events. [2024-06-03 19:25:19,575 INFO L125 PetriNetUnfolderBase]: For 919657/919671 co-relation queries the response was YES. [2024-06-03 19:25:19,641 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. [2024-06-03 19:25:19,693 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 976 selfloop transitions, 54 changer transitions 0/1047 dead transitions. [2024-06-03 19:25:19,693 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 372 places, 1047 transitions, 23059 flow [2024-06-03 19:25:19,694 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 19:25:19,694 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 19:25:19,694 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 164 transitions. [2024-06-03 19:25:19,694 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41414141414141414 [2024-06-03 19:25:19,694 INFO L175 Difference]: Start difference. First operand has 364 places, 1004 transitions, 20198 flow. Second operand 9 states and 164 transitions. [2024-06-03 19:25:19,695 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 372 places, 1047 transitions, 23059 flow [2024-06-03 19:25:22,072 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 365 places, 1047 transitions, 22918 flow, removed 52 selfloop flow, removed 7 redundant places. [2024-06-03 19:25:22,088 INFO L231 Difference]: Finished difference. Result has 366 places, 1008 transitions, 20400 flow [2024-06-03 19:25:22,089 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} [2024-06-03 19:25:22,089 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 321 predicate places. [2024-06-03 19:25:22,089 INFO L495 AbstractCegarLoop]: Abstraction has has 366 places, 1008 transitions, 20400 flow [2024-06-03 19:25:22,089 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) [2024-06-03 19:25:22,090 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:25:22,090 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:25:22,090 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80 [2024-06-03 19:25:22,090 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)] === [2024-06-03 19:25:22,090 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:25:22,090 INFO L85 PathProgramCache]: Analyzing trace with hash -135275723, now seen corresponding path program 12 times [2024-06-03 19:25:22,090 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:25:22,091 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2108260128] [2024-06-03 19:25:22,091 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:25:22,091 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:25:22,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:25:23,560 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:25:23,560 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:25:23,560 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2108260128] [2024-06-03 19:25:23,560 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2108260128] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:25:23,560 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:25:23,560 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 19:25:23,561 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1082889042] [2024-06-03 19:25:23,561 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:25:23,561 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 19:25:23,561 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:25:23,561 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 19:25:23,561 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-03 19:25:23,690 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 44 [2024-06-03 19:25:23,691 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) [2024-06-03 19:25:23,691 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:25:23,691 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 44 [2024-06-03 19:25:23,691 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:25:26,784 INFO L124 PetriNetUnfolderBase]: 6737/10024 cut-off events. [2024-06-03 19:25:26,785 INFO L125 PetriNetUnfolderBase]: For 948233/948247 co-relation queries the response was YES. [2024-06-03 19:25:26,853 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. [2024-06-03 19:25:26,907 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 963 selfloop transitions, 85 changer transitions 0/1065 dead transitions. [2024-06-03 19:25:26,907 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 374 places, 1065 transitions, 23590 flow [2024-06-03 19:25:26,907 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 19:25:26,908 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 19:25:26,908 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 167 transitions. [2024-06-03 19:25:26,908 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4217171717171717 [2024-06-03 19:25:26,908 INFO L175 Difference]: Start difference. First operand has 366 places, 1008 transitions, 20400 flow. Second operand 9 states and 167 transitions. [2024-06-03 19:25:26,908 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 374 places, 1065 transitions, 23590 flow [2024-06-03 19:25:29,282 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 369 places, 1065 transitions, 23411 flow, removed 63 selfloop flow, removed 5 redundant places. [2024-06-03 19:25:29,311 INFO L231 Difference]: Finished difference. Result has 371 places, 1019 transitions, 20863 flow [2024-06-03 19:25:29,312 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} [2024-06-03 19:25:29,312 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 326 predicate places. [2024-06-03 19:25:29,312 INFO L495 AbstractCegarLoop]: Abstraction has has 371 places, 1019 transitions, 20863 flow [2024-06-03 19:25:29,312 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) [2024-06-03 19:25:29,312 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:25:29,313 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:25:29,313 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81 [2024-06-03 19:25:29,313 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)] === [2024-06-03 19:25:29,313 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:25:29,313 INFO L85 PathProgramCache]: Analyzing trace with hash -135285023, now seen corresponding path program 13 times [2024-06-03 19:25:29,313 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:25:29,314 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [634727044] [2024-06-03 19:25:29,314 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:25:29,314 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:25:29,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:25:30,717 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:25:30,717 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:25:30,717 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [634727044] [2024-06-03 19:25:30,717 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [634727044] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:25:30,717 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:25:30,717 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 19:25:30,718 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [632146555] [2024-06-03 19:25:30,718 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:25:30,718 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 19:25:30,718 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:25:30,718 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 19:25:30,718 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-03 19:25:30,829 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 44 [2024-06-03 19:25:30,829 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) [2024-06-03 19:25:30,829 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:25:30,829 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 44 [2024-06-03 19:25:30,829 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:25:34,101 INFO L124 PetriNetUnfolderBase]: 6811/10134 cut-off events. [2024-06-03 19:25:34,102 INFO L125 PetriNetUnfolderBase]: For 982515/982529 co-relation queries the response was YES. [2024-06-03 19:25:34,177 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. [2024-06-03 19:25:34,232 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 965 selfloop transitions, 104 changer transitions 0/1086 dead transitions. [2024-06-03 19:25:34,233 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 379 places, 1086 transitions, 24126 flow [2024-06-03 19:25:34,233 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 19:25:34,233 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 19:25:34,234 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 165 transitions. [2024-06-03 19:25:34,234 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4166666666666667 [2024-06-03 19:25:34,234 INFO L175 Difference]: Start difference. First operand has 371 places, 1019 transitions, 20863 flow. Second operand 9 states and 165 transitions. [2024-06-03 19:25:34,234 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 379 places, 1086 transitions, 24126 flow [2024-06-03 19:25:36,433 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 377 places, 1086 transitions, 23877 flow, removed 121 selfloop flow, removed 2 redundant places. [2024-06-03 19:25:36,577 INFO L231 Difference]: Finished difference. Result has 378 places, 1039 transitions, 21461 flow [2024-06-03 19:25:36,578 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=20672, PETRI_DIFFERENCE_MINUEND_PLACES=369, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1019, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=84, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=933, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=21461, PETRI_PLACES=378, PETRI_TRANSITIONS=1039} [2024-06-03 19:25:36,578 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 333 predicate places. [2024-06-03 19:25:36,578 INFO L495 AbstractCegarLoop]: Abstraction has has 378 places, 1039 transitions, 21461 flow [2024-06-03 19:25:36,579 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) [2024-06-03 19:25:36,579 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:25:36,579 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:25:36,579 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82 [2024-06-03 19:25:36,579 INFO L420 AbstractCegarLoop]: === Iteration 84 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:25:36,579 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:25:36,579 INFO L85 PathProgramCache]: Analyzing trace with hash 426575585, now seen corresponding path program 14 times [2024-06-03 19:25:36,579 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:25:36,579 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1954195354] [2024-06-03 19:25:36,579 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:25:36,580 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:25:36,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:25:37,804 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:25:37,805 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:25:37,805 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1954195354] [2024-06-03 19:25:37,805 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1954195354] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:25:37,805 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:25:37,805 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-03 19:25:37,805 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1611547573] [2024-06-03 19:25:37,805 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:25:37,805 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-03 19:25:37,806 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:25:37,806 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-03 19:25:37,806 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2024-06-03 19:25:37,985 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 44 [2024-06-03 19:25:37,985 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 378 places, 1039 transitions, 21461 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) [2024-06-03 19:25:37,986 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:25:37,986 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 44 [2024-06-03 19:25:37,986 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand