./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/pthread-wmm/mix043.oepc.i --full-output --witness-type correctness_witness --witnessparser.only.consider.loop.invariants false --cacsl2boogietranslator.check.unreachability.of.reach_error.function false --validate ./goblint.2024-06-19_11-23-25.files/protection/mix043.oepc.yml/witness.yml --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 7724a2de Calling Ultimate with: /root/.sdkman/candidates/java/current/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReachWitnessValidation.xml -i ../../../trunk/examples/svcomp/pthread-wmm/mix043.oepc.i ./goblint.2024-06-19_11-23-25.files/protection/mix043.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-7724a2d-m [2024-06-27 20:30:28,402 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-06-27 20:30:28,452 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-06-27 20:30:28,457 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-06-27 20:30:28,457 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-06-27 20:30:28,478 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-06-27 20:30:28,478 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-06-27 20:30:28,478 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-06-27 20:30:28,479 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-06-27 20:30:28,479 INFO L153 SettingsManager]: * Use memory slicer=true [2024-06-27 20:30:28,479 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-06-27 20:30:28,480 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-06-27 20:30:28,480 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-06-27 20:30:28,480 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-06-27 20:30:28,481 INFO L153 SettingsManager]: * Use SBE=true [2024-06-27 20:30:28,481 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-06-27 20:30:28,481 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-06-27 20:30:28,481 INFO L153 SettingsManager]: * sizeof long=4 [2024-06-27 20:30:28,482 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-06-27 20:30:28,482 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-06-27 20:30:28,482 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-06-27 20:30:28,483 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-06-27 20:30:28,483 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-06-27 20:30:28,483 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-06-27 20:30:28,483 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-06-27 20:30:28,484 INFO L153 SettingsManager]: * sizeof long double=12 [2024-06-27 20:30:28,484 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-06-27 20:30:28,484 INFO L153 SettingsManager]: * Use constant arrays=true [2024-06-27 20:30:28,485 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-06-27 20:30:28,485 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-06-27 20:30:28,485 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-06-27 20:30:28,485 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-06-27 20:30:28,485 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-27 20:30:28,486 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-06-27 20:30:28,486 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-06-27 20:30:28,486 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-06-27 20:30:28,486 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-06-27 20:30:28,486 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-06-27 20:30:28,487 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-06-27 20:30:28,495 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-06-27 20:30:28,495 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-06-27 20:30:28,496 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-06-27 20:30:28,496 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-06-27 20:30:28,496 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check unreachability of reach_error function -> false [2024-06-27 20:30:28,686 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-06-27 20:30:28,708 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-06-27 20:30:28,709 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-06-27 20:30:28,711 INFO L270 PluginConnector]: Initializing CDTParser... [2024-06-27 20:30:28,711 INFO L274 PluginConnector]: CDTParser initialized [2024-06-27 20:30:28,712 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-wmm/mix043.oepc.i [2024-06-27 20:30:29,711 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-06-27 20:30:29,893 INFO L384 CDTParser]: Found 1 translation units. [2024-06-27 20:30:29,893 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/mix043.oepc.i [2024-06-27 20:30:29,914 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c28fe0850/36343c90b154424594d0671945f084ad/FLAGb3b1aadfa [2024-06-27 20:30:29,923 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c28fe0850/36343c90b154424594d0671945f084ad [2024-06-27 20:30:29,926 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-06-27 20:30:29,926 INFO L274 PluginConnector]: Witness Parser initialized [2024-06-27 20:30:29,926 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/./goblint.2024-06-19_11-23-25.files/protection/mix043.oepc.yml/witness.yml [2024-06-27 20:30:30,089 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-06-27 20:30:30,092 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-06-27 20:30:30,093 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-06-27 20:30:30,093 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-06-27 20:30:30,098 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-06-27 20:30:30,098 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.06 08:30:29" (1/2) ... [2024-06-27 20:30:30,099 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1c906634 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 08:30:30, skipping insertion in model container [2024-06-27 20:30:30,100 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.06 08:30:29" (1/2) ... [2024-06-27 20:30:30,101 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@41eea480 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 08:30:30, skipping insertion in model container [2024-06-27 20:30:30,101 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 27.06 08:30:30" (2/2) ... [2024-06-27 20:30:30,101 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1c906634 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 08:30:30, skipping insertion in model container [2024-06-27 20:30:30,102 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 27.06 08:30:30" (2/2) ... [2024-06-27 20:30:30,102 INFO L83 nessWitnessExtractor]: Extracting all invariants from correctness witness [2024-06-27 20:30:30,198 INFO L95 edCorrectnessWitness]: Found the following entries in the witness: [2024-06-27 20:30:30,199 INFO L97 edCorrectnessWitness]: Location invariant before [L874-L874] (((((((((((((((((((((((! multithreaded || (b$w_buff0 == 0 || b$w_buff0 == 1)) && (! multithreaded || ((z == 0 || z == 1) || z == 2))) && (! multithreaded || (b == 0 || b == 1))) && (! multithreaded || (a == 0 || a == 1))) && (! multithreaded || b$read_delayed == (_Bool)0)) && (! multithreaded || (x == 0 || x == 1))) && (! multithreaded || (__unbuffered_p3_EBX == 0 || __unbuffered_p3_EBX == 1))) && (! multithreaded || b$read_delayed_var == 0)) && (! multithreaded || b$r_buff0_thd4 == (_Bool)0)) && (! multithreaded || b$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || b$r_buff1_thd4 == (_Bool)0)) && (! multithreaded || b$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || (y == 0 || y == 1))) && (! multithreaded || b$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || b$flush_delayed == (_Bool)0)) && (! multithreaded || b$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1))) && (! multithreaded || b$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1))) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || b$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || (b$w_buff1 == 0 || b$w_buff1 == 1))) && (! multithreaded || (__unbuffered_p3_EAX == 0 || __unbuffered_p3_EAX == 1))) && (! multithreaded || (b$mem_tmp == 0 || b$mem_tmp == 1)) [2024-06-27 20:30:30,199 INFO L97 edCorrectnessWitness]: Location invariant before [L879-L879] (((((((((((((((((((((((! multithreaded || (b$w_buff0 == 0 || b$w_buff0 == 1)) && (! multithreaded || ((z == 0 || z == 1) || z == 2))) && (! multithreaded || (b == 0 || b == 1))) && (! multithreaded || (a == 0 || a == 1))) && (! multithreaded || b$read_delayed == (_Bool)0)) && (! multithreaded || (x == 0 || x == 1))) && (! multithreaded || (__unbuffered_p3_EBX == 0 || __unbuffered_p3_EBX == 1))) && (! multithreaded || b$read_delayed_var == 0)) && (! multithreaded || b$r_buff0_thd4 == (_Bool)0)) && (! multithreaded || b$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || b$r_buff1_thd4 == (_Bool)0)) && (! multithreaded || b$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || (y == 0 || y == 1))) && (! multithreaded || b$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || b$flush_delayed == (_Bool)0)) && (! multithreaded || b$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1))) && (! multithreaded || b$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1))) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || b$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || (b$w_buff1 == 0 || b$w_buff1 == 1))) && (! multithreaded || (__unbuffered_p3_EAX == 0 || __unbuffered_p3_EAX == 1))) && (! multithreaded || (b$mem_tmp == 0 || b$mem_tmp == 1)) [2024-06-27 20:30:30,199 INFO L97 edCorrectnessWitness]: Location invariant before [L878-L878] (((((((((((((((((((((((! multithreaded || (b$w_buff0 == 0 || b$w_buff0 == 1)) && (! multithreaded || ((z == 0 || z == 1) || z == 2))) && (! multithreaded || (b == 0 || b == 1))) && (! multithreaded || (a == 0 || a == 1))) && (! multithreaded || b$read_delayed == (_Bool)0)) && (! multithreaded || (x == 0 || x == 1))) && (! multithreaded || (__unbuffered_p3_EBX == 0 || __unbuffered_p3_EBX == 1))) && (! multithreaded || b$read_delayed_var == 0)) && (! multithreaded || b$r_buff0_thd4 == (_Bool)0)) && (! multithreaded || b$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || b$r_buff1_thd4 == (_Bool)0)) && (! multithreaded || b$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || (y == 0 || y == 1))) && (! multithreaded || b$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || b$flush_delayed == (_Bool)0)) && (! multithreaded || b$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1))) && (! multithreaded || b$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1))) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || b$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || (b$w_buff1 == 0 || b$w_buff1 == 1))) && (! multithreaded || (__unbuffered_p3_EAX == 0 || __unbuffered_p3_EAX == 1))) && (! multithreaded || (b$mem_tmp == 0 || b$mem_tmp == 1)) [2024-06-27 20:30:30,200 INFO L97 edCorrectnessWitness]: Location invariant before [L876-L876] (((((((((((((((((((((((! multithreaded || (b$w_buff0 == 0 || b$w_buff0 == 1)) && (! multithreaded || ((z == 0 || z == 1) || z == 2))) && (! multithreaded || (b == 0 || b == 1))) && (! multithreaded || (a == 0 || a == 1))) && (! multithreaded || b$read_delayed == (_Bool)0)) && (! multithreaded || (x == 0 || x == 1))) && (! multithreaded || (__unbuffered_p3_EBX == 0 || __unbuffered_p3_EBX == 1))) && (! multithreaded || b$read_delayed_var == 0)) && (! multithreaded || b$r_buff0_thd4 == (_Bool)0)) && (! multithreaded || b$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || b$r_buff1_thd4 == (_Bool)0)) && (! multithreaded || b$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || (y == 0 || y == 1))) && (! multithreaded || b$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || b$flush_delayed == (_Bool)0)) && (! multithreaded || b$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1))) && (! multithreaded || b$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1))) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || b$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || (b$w_buff1 == 0 || b$w_buff1 == 1))) && (! multithreaded || (__unbuffered_p3_EAX == 0 || __unbuffered_p3_EAX == 1))) && (! multithreaded || (b$mem_tmp == 0 || b$mem_tmp == 1)) [2024-06-27 20:30:30,200 INFO L103 edCorrectnessWitness]: ghost_variable multithreaded = 0 [2024-06-27 20:30:30,200 INFO L106 edCorrectnessWitness]: ghost_update [L872-L872] multithreaded = 1; [2024-06-27 20:30:30,238 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-06-27 20:30:30,513 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-27 20:30:30,528 INFO L202 MainTranslator]: Completed pre-run Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local [2024-06-27 20:30:30,647 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-27 20:30:30,679 INFO L206 MainTranslator]: Completed translation [2024-06-27 20:30:30,679 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 08:30:30 WrapperNode [2024-06-27 20:30:30,679 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-06-27 20:30:30,680 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-06-27 20:30:30,680 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-06-27 20:30:30,680 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-06-27 20:30:30,686 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 08:30:30" (1/1) ... [2024-06-27 20:30:30,722 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 08:30:30" (1/1) ... [2024-06-27 20:30:30,757 INFO L138 Inliner]: procedures = 176, calls = 56, calls flagged for inlining = 6, calls inlined = 7, statements flattened = 140 [2024-06-27 20:30:30,758 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-06-27 20:30:30,758 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-06-27 20:30:30,758 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-06-27 20:30:30,758 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-06-27 20:30:30,767 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 08:30:30" (1/1) ... [2024-06-27 20:30:30,767 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 08:30:30" (1/1) ... [2024-06-27 20:30:30,769 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 08:30:30" (1/1) ... [2024-06-27 20:30:30,796 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]. [2024-06-27 20:30:30,796 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 08:30:30" (1/1) ... [2024-06-27 20:30:30,796 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 08:30:30" (1/1) ... [2024-06-27 20:30:30,810 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 08:30:30" (1/1) ... [2024-06-27 20:30:30,818 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 08:30:30" (1/1) ... [2024-06-27 20:30:30,821 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 08:30:30" (1/1) ... [2024-06-27 20:30:30,823 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 08:30:30" (1/1) ... [2024-06-27 20:30:30,825 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-06-27 20:30:30,826 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-06-27 20:30:30,826 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-06-27 20:30:30,826 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-06-27 20:30:30,827 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 08:30:30" (1/1) ... [2024-06-27 20:30:30,830 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-27 20:30:30,836 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 20:30:30,847 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-06-27 20:30:30,873 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-06-27 20:30:30,888 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-06-27 20:30:30,889 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-06-27 20:30:30,889 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2024-06-27 20:30:30,889 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2024-06-27 20:30:30,889 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2024-06-27 20:30:30,889 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2024-06-27 20:30:30,889 INFO L130 BoogieDeclarations]: Found specification of procedure P2 [2024-06-27 20:30:30,889 INFO L138 BoogieDeclarations]: Found implementation of procedure P2 [2024-06-27 20:30:30,889 INFO L130 BoogieDeclarations]: Found specification of procedure P3 [2024-06-27 20:30:30,889 INFO L138 BoogieDeclarations]: Found implementation of procedure P3 [2024-06-27 20:30:30,889 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-06-27 20:30:30,889 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-06-27 20:30:30,889 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-06-27 20:30:30,889 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-06-27 20:30:30,890 WARN L214 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2024-06-27 20:30:31,014 INFO L244 CfgBuilder]: Building ICFG [2024-06-27 20:30:31,015 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-06-27 20:30:31,345 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-06-27 20:30:31,346 INFO L293 CfgBuilder]: Performing block encoding [2024-06-27 20:30:31,495 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-06-27 20:30:31,496 INFO L320 CfgBuilder]: Removed 0 assume(true) statements. [2024-06-27 20:30:31,496 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.06 08:30:31 BoogieIcfgContainer [2024-06-27 20:30:31,496 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-06-27 20:30:31,499 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-06-27 20:30:31,499 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-06-27 20:30:31,501 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-06-27 20:30:31,501 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.06 08:30:29" (1/4) ... [2024-06-27 20:30:31,501 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7910200b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.06 08:30:31, skipping insertion in model container [2024-06-27 20:30:31,502 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 27.06 08:30:30" (2/4) ... [2024-06-27 20:30:31,502 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7910200b and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 27.06 08:30:31, skipping insertion in model container [2024-06-27 20:30:31,502 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 08:30:30" (3/4) ... [2024-06-27 20:30:31,502 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7910200b and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 27.06 08:30:31, skipping insertion in model container [2024-06-27 20:30:31,502 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.06 08:30:31" (4/4) ... [2024-06-27 20:30:31,503 INFO L112 eAbstractionObserver]: Analyzing ICFG mix043.oepc.i [2024-06-27 20:30:31,517 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-06-27 20:30:31,517 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 4 error locations. [2024-06-27 20:30:31,517 INFO L522 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-06-27 20:30:31,559 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-06-27 20:30:31,588 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 66 places, 53 transitions, 122 flow [2024-06-27 20:30:31,616 INFO L124 PetriNetUnfolderBase]: 0/49 cut-off events. [2024-06-27 20:30:31,616 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-27 20:30:31,617 INFO L83 FinitePrefix]: Finished finitePrefix Result has 62 conditions, 49 events. 0/49 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 94 event pairs, 0 based on Foata normal form. 0/45 useless extension candidates. Maximal degree in co-relation 0. Up to 1 conditions per place. [2024-06-27 20:30:31,618 INFO L82 GeneralOperation]: Start removeDead. Operand has 66 places, 53 transitions, 122 flow [2024-06-27 20:30:31,621 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 56 places, 43 transitions, 98 flow [2024-06-27 20:30:31,632 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-06-27 20:30:31,637 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;@34ff24d2, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-06-27 20:30:31,637 INFO L358 AbstractCegarLoop]: Starting to check reachability of 8 error locations. [2024-06-27 20:30:31,641 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-06-27 20:30:31,641 INFO L124 PetriNetUnfolderBase]: 0/5 cut-off events. [2024-06-27 20:30:31,641 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-27 20:30:31,641 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:30:31,642 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2024-06-27 20:30:31,642 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-27 20:30:31,645 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:30:31,645 INFO L85 PathProgramCache]: Analyzing trace with hash 407834173, now seen corresponding path program 1 times [2024-06-27 20:30:31,654 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:30:31,654 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [826733023] [2024-06-27 20:30:31,654 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:30:31,655 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:30:31,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:30:32,542 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:30:32,543 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:30:32,544 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [826733023] [2024-06-27 20:30:32,544 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [826733023] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:30:32,544 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:30:32,545 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-06-27 20:30:32,546 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1235525841] [2024-06-27 20:30:32,546 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:30:32,552 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-06-27 20:30:32,556 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:30:32,578 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-06-27 20:30:32,579 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-06-27 20:30:32,634 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 53 [2024-06-27 20:30:32,637 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 43 transitions, 98 flow. Second operand has 3 states, 3 states have (on average 16.333333333333332) internal successors, (49), 3 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:30:32,637 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:30:32,637 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 53 [2024-06-27 20:30:32,638 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:30:34,204 INFO L124 PetriNetUnfolderBase]: 10942/15157 cut-off events. [2024-06-27 20:30:34,204 INFO L125 PetriNetUnfolderBase]: For 178/178 co-relation queries the response was YES. [2024-06-27 20:30:34,269 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30334 conditions, 15157 events. 10942/15157 cut-off events. For 178/178 co-relation queries the response was YES. Maximal size of possible extension queue 520. Compared 82789 event pairs, 8442 based on Foata normal form. 1/14828 useless extension candidates. Maximal degree in co-relation 30321. Up to 14798 conditions per place. [2024-06-27 20:30:34,333 INFO L140 encePairwiseOnDemand]: 44/53 looper letters, 44 selfloop transitions, 5 changer transitions 0/57 dead transitions. [2024-06-27 20:30:34,334 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 58 places, 57 transitions, 233 flow [2024-06-27 20:30:34,335 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-06-27 20:30:34,337 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-06-27 20:30:34,342 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 98 transitions. [2024-06-27 20:30:34,343 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6163522012578616 [2024-06-27 20:30:34,345 INFO L175 Difference]: Start difference. First operand has 56 places, 43 transitions, 98 flow. Second operand 3 states and 98 transitions. [2024-06-27 20:30:34,345 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 58 places, 57 transitions, 233 flow [2024-06-27 20:30:34,348 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 54 places, 57 transitions, 226 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-06-27 20:30:34,350 INFO L231 Difference]: Finished difference. Result has 55 places, 47 transitions, 133 flow [2024-06-27 20:30:34,351 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=94, PETRI_DIFFERENCE_MINUEND_PLACES=52, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=133, PETRI_PLACES=55, PETRI_TRANSITIONS=47} [2024-06-27 20:30:34,354 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, -1 predicate places. [2024-06-27 20:30:34,354 INFO L495 AbstractCegarLoop]: Abstraction has has 55 places, 47 transitions, 133 flow [2024-06-27 20:30:34,354 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 16.333333333333332) internal successors, (49), 3 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:30:34,354 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:30:34,355 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:30:34,355 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-06-27 20:30:34,355 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-27 20:30:34,355 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:30:34,356 INFO L85 PathProgramCache]: Analyzing trace with hash 1086673948, now seen corresponding path program 1 times [2024-06-27 20:30:34,356 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:30:34,356 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1963569522] [2024-06-27 20:30:34,356 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:30:34,356 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:30:34,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:30:34,967 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:30:34,967 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:30:34,967 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1963569522] [2024-06-27 20:30:34,967 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1963569522] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:30:34,968 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:30:34,968 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-06-27 20:30:34,968 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [635457599] [2024-06-27 20:30:34,968 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:30:34,970 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-27 20:30:34,970 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:30:34,970 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-27 20:30:34,970 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-06-27 20:30:35,085 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 53 [2024-06-27 20:30:35,085 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 55 places, 47 transitions, 133 flow. Second operand has 4 states, 4 states have (on average 16.25) internal successors, (65), 4 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:30:35,085 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:30:35,085 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 53 [2024-06-27 20:30:35,086 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:30:36,518 INFO L124 PetriNetUnfolderBase]: 10932/15154 cut-off events. [2024-06-27 20:30:36,519 INFO L125 PetriNetUnfolderBase]: For 2814/2814 co-relation queries the response was YES. [2024-06-27 20:30:36,540 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34167 conditions, 15154 events. 10932/15154 cut-off events. For 2814/2814 co-relation queries the response was YES. Maximal size of possible extension queue 520. Compared 82762 event pairs, 7512 based on Foata normal form. 4/15005 useless extension candidates. Maximal degree in co-relation 34155. Up to 14763 conditions per place. [2024-06-27 20:30:36,590 INFO L140 encePairwiseOnDemand]: 43/53 looper letters, 54 selfloop transitions, 9 changer transitions 0/71 dead transitions. [2024-06-27 20:30:36,591 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 58 places, 71 transitions, 325 flow [2024-06-27 20:30:36,591 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-27 20:30:36,591 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-27 20:30:36,592 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 127 transitions. [2024-06-27 20:30:36,592 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5990566037735849 [2024-06-27 20:30:36,593 INFO L175 Difference]: Start difference. First operand has 55 places, 47 transitions, 133 flow. Second operand 4 states and 127 transitions. [2024-06-27 20:30:36,593 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 58 places, 71 transitions, 325 flow [2024-06-27 20:30:36,594 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 57 places, 71 transitions, 320 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-06-27 20:30:36,595 INFO L231 Difference]: Finished difference. Result has 58 places, 51 transitions, 181 flow [2024-06-27 20:30:36,596 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=128, PETRI_DIFFERENCE_MINUEND_PLACES=54, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=47, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=181, PETRI_PLACES=58, PETRI_TRANSITIONS=51} [2024-06-27 20:30:36,596 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 2 predicate places. [2024-06-27 20:30:36,596 INFO L495 AbstractCegarLoop]: Abstraction has has 58 places, 51 transitions, 181 flow [2024-06-27 20:30:36,597 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 16.25) internal successors, (65), 4 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:30:36,597 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:30:36,597 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:30:36,597 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-06-27 20:30:36,597 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-27 20:30:36,598 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:30:36,598 INFO L85 PathProgramCache]: Analyzing trace with hash 616670715, now seen corresponding path program 1 times [2024-06-27 20:30:36,598 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:30:36,598 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [776335343] [2024-06-27 20:30:36,598 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:30:36,599 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:30:36,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:30:37,725 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:30:37,726 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:30:37,726 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [776335343] [2024-06-27 20:30:37,726 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [776335343] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:30:37,726 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:30:37,726 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 20:30:37,727 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [453723307] [2024-06-27 20:30:37,727 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:30:37,727 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 20:30:37,727 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:30:37,728 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 20:30:37,728 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-06-27 20:30:37,795 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 53 [2024-06-27 20:30:37,796 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 58 places, 51 transitions, 181 flow. Second operand has 6 states, 6 states have (on average 15.166666666666666) internal successors, (91), 6 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:30:37,796 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:30:37,796 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 53 [2024-06-27 20:30:37,796 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:30:39,427 INFO L124 PetriNetUnfolderBase]: 13257/18301 cut-off events. [2024-06-27 20:30:39,427 INFO L125 PetriNetUnfolderBase]: For 9331/9331 co-relation queries the response was YES. [2024-06-27 20:30:39,453 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45520 conditions, 18301 events. 13257/18301 cut-off events. For 9331/9331 co-relation queries the response was YES. Maximal size of possible extension queue 614. Compared 100570 event pairs, 7685 based on Foata normal form. 4/18122 useless extension candidates. Maximal degree in co-relation 45506. Up to 17812 conditions per place. [2024-06-27 20:30:39,519 INFO L140 encePairwiseOnDemand]: 41/53 looper letters, 75 selfloop transitions, 17 changer transitions 0/99 dead transitions. [2024-06-27 20:30:39,519 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 63 places, 99 transitions, 512 flow [2024-06-27 20:30:39,520 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 20:30:39,520 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 20:30:39,524 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 180 transitions. [2024-06-27 20:30:39,524 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5660377358490566 [2024-06-27 20:30:39,525 INFO L175 Difference]: Start difference. First operand has 58 places, 51 transitions, 181 flow. Second operand 6 states and 180 transitions. [2024-06-27 20:30:39,525 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 63 places, 99 transitions, 512 flow [2024-06-27 20:30:39,527 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 61 places, 99 transitions, 484 flow, removed 6 selfloop flow, removed 2 redundant places. [2024-06-27 20:30:39,529 INFO L231 Difference]: Finished difference. Result has 63 places, 59 transitions, 258 flow [2024-06-27 20:30:39,529 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=162, PETRI_DIFFERENCE_MINUEND_PLACES=56, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=51, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=258, PETRI_PLACES=63, PETRI_TRANSITIONS=59} [2024-06-27 20:30:39,530 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 7 predicate places. [2024-06-27 20:30:39,531 INFO L495 AbstractCegarLoop]: Abstraction has has 63 places, 59 transitions, 258 flow [2024-06-27 20:30:39,531 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 15.166666666666666) internal successors, (91), 6 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:30:39,531 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:30:39,531 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:30:39,531 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-06-27 20:30:39,531 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-27 20:30:39,532 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:30:39,532 INFO L85 PathProgramCache]: Analyzing trace with hash 216202615, now seen corresponding path program 1 times [2024-06-27 20:30:39,532 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:30:39,533 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [903733547] [2024-06-27 20:30:39,533 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:30:39,533 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:30:39,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:30:40,890 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:30:40,891 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:30:40,891 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [903733547] [2024-06-27 20:30:40,891 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [903733547] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:30:40,896 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:30:40,896 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 20:30:40,897 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [421152656] [2024-06-27 20:30:40,897 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:30:40,897 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 20:30:40,898 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:30:40,899 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 20:30:40,899 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-27 20:30:40,987 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 53 [2024-06-27 20:30:40,988 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 59 transitions, 258 flow. Second operand has 7 states, 7 states have (on average 15.142857142857142) internal successors, (106), 7 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:30:40,988 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:30:40,988 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 53 [2024-06-27 20:30:40,988 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:30:42,692 INFO L124 PetriNetUnfolderBase]: 13241/18275 cut-off events. [2024-06-27 20:30:42,692 INFO L125 PetriNetUnfolderBase]: For 18925/18925 co-relation queries the response was YES. [2024-06-27 20:30:42,737 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50590 conditions, 18275 events. 13241/18275 cut-off events. For 18925/18925 co-relation queries the response was YES. Maximal size of possible extension queue 614. Compared 99878 event pairs, 6594 based on Foata normal form. 8/18100 useless extension candidates. Maximal degree in co-relation 50574. Up to 17746 conditions per place. [2024-06-27 20:30:42,818 INFO L140 encePairwiseOnDemand]: 41/53 looper letters, 82 selfloop transitions, 20 changer transitions 0/109 dead transitions. [2024-06-27 20:30:42,819 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 68 places, 109 transitions, 602 flow [2024-06-27 20:30:42,819 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 20:30:42,819 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 20:30:42,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 204 transitions. [2024-06-27 20:30:42,820 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5498652291105122 [2024-06-27 20:30:42,820 INFO L175 Difference]: Start difference. First operand has 63 places, 59 transitions, 258 flow. Second operand 7 states and 204 transitions. [2024-06-27 20:30:42,820 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 68 places, 109 transitions, 602 flow [2024-06-27 20:30:42,827 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 65 places, 109 transitions, 563 flow, removed 6 selfloop flow, removed 3 redundant places. [2024-06-27 20:30:42,828 INFO L231 Difference]: Finished difference. Result has 66 places, 61 transitions, 291 flow [2024-06-27 20:30:42,828 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=211, PETRI_DIFFERENCE_MINUEND_PLACES=59, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=58, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=291, PETRI_PLACES=66, PETRI_TRANSITIONS=61} [2024-06-27 20:30:42,829 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 10 predicate places. [2024-06-27 20:30:42,829 INFO L495 AbstractCegarLoop]: Abstraction has has 66 places, 61 transitions, 291 flow [2024-06-27 20:30:42,829 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.142857142857142) internal successors, (106), 7 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:30:42,829 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:30:42,830 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:30:42,830 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-06-27 20:30:42,830 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-27 20:30:42,830 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:30:42,830 INFO L85 PathProgramCache]: Analyzing trace with hash 675725916, now seen corresponding path program 1 times [2024-06-27 20:30:42,830 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:30:42,831 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [953318925] [2024-06-27 20:30:42,831 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:30:42,831 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:30:42,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:30:43,402 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:30:43,402 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:30:43,402 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [953318925] [2024-06-27 20:30:43,402 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [953318925] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:30:43,402 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:30:43,403 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 20:30:43,403 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1687208705] [2024-06-27 20:30:43,403 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:30:43,403 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 20:30:43,404 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:30:43,404 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 20:30:43,404 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-06-27 20:30:43,468 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 53 [2024-06-27 20:30:43,468 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 61 transitions, 291 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) [2024-06-27 20:30:43,468 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:30:43,468 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 53 [2024-06-27 20:30:43,468 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:30:44,939 INFO L124 PetriNetUnfolderBase]: 13223/18251 cut-off events. [2024-06-27 20:30:44,939 INFO L125 PetriNetUnfolderBase]: For 29462/29462 co-relation queries the response was YES. [2024-06-27 20:30:44,977 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54082 conditions, 18251 events. 13223/18251 cut-off events. For 29462/29462 co-relation queries the response was YES. Maximal size of possible extension queue 614. Compared 100195 event pairs, 7013 based on Foata normal form. 6/18074 useless extension candidates. Maximal degree in co-relation 54064. Up to 17797 conditions per place. [2024-06-27 20:30:45,051 INFO L140 encePairwiseOnDemand]: 43/53 looper letters, 67 selfloop transitions, 10 changer transitions 0/83 dead transitions. [2024-06-27 20:30:45,051 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 70 places, 83 transitions, 517 flow [2024-06-27 20:30:45,052 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 20:30:45,052 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 20:30:45,052 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 125 transitions. [2024-06-27 20:30:45,053 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4716981132075472 [2024-06-27 20:30:45,053 INFO L175 Difference]: Start difference. First operand has 66 places, 61 transitions, 291 flow. Second operand 5 states and 125 transitions. [2024-06-27 20:30:45,053 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 70 places, 83 transitions, 517 flow [2024-06-27 20:30:45,060 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 65 places, 83 transitions, 463 flow, removed 9 selfloop flow, removed 5 redundant places. [2024-06-27 20:30:45,061 INFO L231 Difference]: Finished difference. Result has 66 places, 65 transitions, 302 flow [2024-06-27 20:30:45,061 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=237, PETRI_DIFFERENCE_MINUEND_PLACES=61, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=61, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=302, PETRI_PLACES=66, PETRI_TRANSITIONS=65} [2024-06-27 20:30:45,062 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 10 predicate places. [2024-06-27 20:30:45,062 INFO L495 AbstractCegarLoop]: Abstraction has has 66 places, 65 transitions, 302 flow [2024-06-27 20:30:45,062 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) [2024-06-27 20:30:45,063 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:30:45,063 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:30:45,063 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-06-27 20:30:45,063 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-27 20:30:45,063 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:30:45,063 INFO L85 PathProgramCache]: Analyzing trace with hash 826868091, now seen corresponding path program 1 times [2024-06-27 20:30:45,063 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:30:45,064 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1045427889] [2024-06-27 20:30:45,065 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:30:45,065 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:30:45,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:30:45,873 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:30:45,873 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:30:45,874 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1045427889] [2024-06-27 20:30:45,874 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1045427889] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:30:45,874 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:30:45,874 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 20:30:45,874 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [831189686] [2024-06-27 20:30:45,874 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:30:45,875 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 20:30:45,875 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:30:45,875 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 20:30:45,875 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-27 20:30:45,940 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 53 [2024-06-27 20:30:45,940 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 65 transitions, 302 flow. Second operand has 7 states, 7 states have (on average 13.428571428571429) internal successors, (94), 7 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:30:45,940 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:30:45,940 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 53 [2024-06-27 20:30:45,940 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:30:47,506 INFO L124 PetriNetUnfolderBase]: 13298/18348 cut-off events. [2024-06-27 20:30:47,506 INFO L125 PetriNetUnfolderBase]: For 41588/41588 co-relation queries the response was YES. [2024-06-27 20:30:47,530 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58671 conditions, 18348 events. 13298/18348 cut-off events. For 41588/41588 co-relation queries the response was YES. Maximal size of possible extension queue 614. Compared 100228 event pairs, 6689 based on Foata normal form. 6/18169 useless extension candidates. Maximal degree in co-relation 58651. Up to 17824 conditions per place. [2024-06-27 20:30:47,584 INFO L140 encePairwiseOnDemand]: 41/53 looper letters, 82 selfloop transitions, 21 changer transitions 0/109 dead transitions. [2024-06-27 20:30:47,584 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 71 places, 109 transitions, 717 flow [2024-06-27 20:30:47,585 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 20:30:47,585 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 20:30:47,585 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 157 transitions. [2024-06-27 20:30:47,585 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4937106918238994 [2024-06-27 20:30:47,586 INFO L175 Difference]: Start difference. First operand has 66 places, 65 transitions, 302 flow. Second operand 6 states and 157 transitions. [2024-06-27 20:30:47,586 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 71 places, 109 transitions, 717 flow [2024-06-27 20:30:47,590 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 68 places, 109 transitions, 663 flow, removed 18 selfloop flow, removed 3 redundant places. [2024-06-27 20:30:47,592 INFO L231 Difference]: Finished difference. Result has 70 places, 77 transitions, 424 flow [2024-06-27 20:30:47,592 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=269, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=65, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=424, PETRI_PLACES=70, PETRI_TRANSITIONS=77} [2024-06-27 20:30:47,592 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 14 predicate places. [2024-06-27 20:30:47,592 INFO L495 AbstractCegarLoop]: Abstraction has has 70 places, 77 transitions, 424 flow [2024-06-27 20:30:47,593 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 13.428571428571429) internal successors, (94), 7 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:30:47,593 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:30:47,593 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:30:47,593 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-06-27 20:30:47,593 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-27 20:30:47,593 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:30:47,594 INFO L85 PathProgramCache]: Analyzing trace with hash 274964813, now seen corresponding path program 2 times [2024-06-27 20:30:47,594 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:30:47,594 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [769766034] [2024-06-27 20:30:47,594 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:30:47,594 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:30:47,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:30:48,303 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:30:48,303 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:30:48,303 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [769766034] [2024-06-27 20:30:48,303 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [769766034] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:30:48,303 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:30:48,303 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 20:30:48,304 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [557468969] [2024-06-27 20:30:48,304 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:30:48,304 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 20:30:48,305 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:30:48,305 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 20:30:48,305 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-27 20:30:48,392 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 53 [2024-06-27 20:30:48,393 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 70 places, 77 transitions, 424 flow. Second operand has 7 states, 7 states have (on average 13.428571428571429) internal successors, (94), 7 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:30:48,393 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:30:48,393 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 53 [2024-06-27 20:30:48,393 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:30:50,014 INFO L124 PetriNetUnfolderBase]: 13280/18329 cut-off events. [2024-06-27 20:30:50,015 INFO L125 PetriNetUnfolderBase]: For 57835/57835 co-relation queries the response was YES. [2024-06-27 20:30:50,048 INFO L83 FinitePrefix]: Finished finitePrefix Result has 63892 conditions, 18329 events. 13280/18329 cut-off events. For 57835/57835 co-relation queries the response was YES. Maximal size of possible extension queue 614. Compared 100417 event pairs, 6822 based on Foata normal form. 6/18152 useless extension candidates. Maximal degree in co-relation 63870. Up to 17860 conditions per place. [2024-06-27 20:30:50,106 INFO L140 encePairwiseOnDemand]: 41/53 looper letters, 82 selfloop transitions, 14 changer transitions 0/102 dead transitions. [2024-06-27 20:30:50,107 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 75 places, 102 transitions, 682 flow [2024-06-27 20:30:50,107 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 20:30:50,107 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 20:30:50,107 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 148 transitions. [2024-06-27 20:30:50,108 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46540880503144655 [2024-06-27 20:30:50,108 INFO L175 Difference]: Start difference. First operand has 70 places, 77 transitions, 424 flow. Second operand 6 states and 148 transitions. [2024-06-27 20:30:50,108 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 75 places, 102 transitions, 682 flow [2024-06-27 20:30:50,127 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 74 places, 102 transitions, 636 flow, removed 22 selfloop flow, removed 1 redundant places. [2024-06-27 20:30:50,128 INFO L231 Difference]: Finished difference. Result has 75 places, 77 transitions, 417 flow [2024-06-27 20:30:50,129 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=378, PETRI_DIFFERENCE_MINUEND_PLACES=69, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=77, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=63, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=417, PETRI_PLACES=75, PETRI_TRANSITIONS=77} [2024-06-27 20:30:50,129 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 19 predicate places. [2024-06-27 20:30:50,130 INFO L495 AbstractCegarLoop]: Abstraction has has 75 places, 77 transitions, 417 flow [2024-06-27 20:30:50,130 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 13.428571428571429) internal successors, (94), 7 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:30:50,130 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:30:50,130 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:30:50,130 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-06-27 20:30:50,130 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-27 20:30:50,131 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:30:50,131 INFO L85 PathProgramCache]: Analyzing trace with hash -137011663, now seen corresponding path program 1 times [2024-06-27 20:30:50,131 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:30:50,131 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [362163503] [2024-06-27 20:30:50,131 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:30:50,131 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:30:50,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:30:51,023 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:30:51,023 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:30:51,023 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [362163503] [2024-06-27 20:30:51,023 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [362163503] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:30:51,023 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:30:51,023 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 20:30:51,024 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1159631733] [2024-06-27 20:30:51,024 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:30:51,024 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 20:30:51,024 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:30:51,024 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 20:30:51,024 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-27 20:30:51,152 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 53 [2024-06-27 20:30:51,153 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 75 places, 77 transitions, 417 flow. Second operand has 8 states, 8 states have (on average 13.375) internal successors, (107), 8 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:30:51,153 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:30:51,153 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 53 [2024-06-27 20:30:51,153 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:30:52,882 INFO L124 PetriNetUnfolderBase]: 13324/18389 cut-off events. [2024-06-27 20:30:52,882 INFO L125 PetriNetUnfolderBase]: For 65999/65999 co-relation queries the response was YES. [2024-06-27 20:30:52,920 INFO L83 FinitePrefix]: Finished finitePrefix Result has 64809 conditions, 18389 events. 13324/18389 cut-off events. For 65999/65999 co-relation queries the response was YES. Maximal size of possible extension queue 614. Compared 100630 event pairs, 6716 based on Foata normal form. 6/18212 useless extension candidates. Maximal degree in co-relation 64784. Up to 17893 conditions per place. [2024-06-27 20:30:52,981 INFO L140 encePairwiseOnDemand]: 41/53 looper letters, 95 selfloop transitions, 18 changer transitions 0/119 dead transitions. [2024-06-27 20:30:52,981 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 81 places, 119 transitions, 781 flow [2024-06-27 20:30:52,982 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 20:30:52,982 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 20:30:52,983 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 177 transitions. [2024-06-27 20:30:52,984 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.477088948787062 [2024-06-27 20:30:52,984 INFO L175 Difference]: Start difference. First operand has 75 places, 77 transitions, 417 flow. Second operand 7 states and 177 transitions. [2024-06-27 20:30:52,984 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 81 places, 119 transitions, 781 flow [2024-06-27 20:30:53,002 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 75 places, 119 transitions, 734 flow, removed 3 selfloop flow, removed 6 redundant places. [2024-06-27 20:30:53,004 INFO L231 Difference]: Finished difference. Result has 76 places, 81 transitions, 463 flow [2024-06-27 20:30:53,004 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=370, PETRI_DIFFERENCE_MINUEND_PLACES=69, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=77, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=59, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=463, PETRI_PLACES=76, PETRI_TRANSITIONS=81} [2024-06-27 20:30:53,004 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 20 predicate places. [2024-06-27 20:30:53,005 INFO L495 AbstractCegarLoop]: Abstraction has has 76 places, 81 transitions, 463 flow [2024-06-27 20:30:53,005 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.375) internal successors, (107), 8 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:30:53,005 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:30:53,005 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:30:53,005 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-06-27 20:30:53,005 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-27 20:30:53,006 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:30:53,006 INFO L85 PathProgramCache]: Analyzing trace with hash -136891693, now seen corresponding path program 2 times [2024-06-27 20:30:53,006 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:30:53,006 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [176694462] [2024-06-27 20:30:53,006 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:30:53,006 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:30:53,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:30:53,833 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:30:53,834 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:30:53,835 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [176694462] [2024-06-27 20:30:53,835 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [176694462] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:30:53,835 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:30:53,835 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 20:30:53,835 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1084151354] [2024-06-27 20:30:53,835 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:30:53,835 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 20:30:53,835 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:30:53,836 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 20:30:53,836 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-27 20:30:53,955 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 53 [2024-06-27 20:30:53,955 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 76 places, 81 transitions, 463 flow. Second operand has 8 states, 8 states have (on average 13.375) internal successors, (107), 8 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:30:53,956 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:30:53,956 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 53 [2024-06-27 20:30:53,956 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:30:55,779 INFO L124 PetriNetUnfolderBase]: 13399/18486 cut-off events. [2024-06-27 20:30:55,779 INFO L125 PetriNetUnfolderBase]: For 84811/84811 co-relation queries the response was YES. [2024-06-27 20:30:55,826 INFO L83 FinitePrefix]: Finished finitePrefix Result has 69653 conditions, 18486 events. 13399/18486 cut-off events. For 84811/84811 co-relation queries the response was YES. Maximal size of possible extension queue 614. Compared 101296 event pairs, 6447 based on Foata normal form. 6/18307 useless extension candidates. Maximal degree in co-relation 69629. Up to 17835 conditions per place. [2024-06-27 20:30:55,902 INFO L140 encePairwiseOnDemand]: 40/53 looper letters, 88 selfloop transitions, 35 changer transitions 0/129 dead transitions. [2024-06-27 20:30:55,902 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 82 places, 129 transitions, 955 flow [2024-06-27 20:30:55,903 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 20:30:55,903 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 20:30:55,903 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 183 transitions. [2024-06-27 20:30:55,904 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49326145552560646 [2024-06-27 20:30:55,904 INFO L175 Difference]: Start difference. First operand has 76 places, 81 transitions, 463 flow. Second operand 7 states and 183 transitions. [2024-06-27 20:30:55,904 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 82 places, 129 transitions, 955 flow [2024-06-27 20:30:55,927 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 77 places, 129 transitions, 894 flow, removed 15 selfloop flow, removed 5 redundant places. [2024-06-27 20:30:55,929 INFO L231 Difference]: Finished difference. Result has 78 places, 89 transitions, 583 flow [2024-06-27 20:30:55,929 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=402, PETRI_DIFFERENCE_MINUEND_PLACES=71, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=81, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=50, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=583, PETRI_PLACES=78, PETRI_TRANSITIONS=89} [2024-06-27 20:30:55,930 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 22 predicate places. [2024-06-27 20:30:55,930 INFO L495 AbstractCegarLoop]: Abstraction has has 78 places, 89 transitions, 583 flow [2024-06-27 20:30:55,930 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.375) internal successors, (107), 8 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:30:55,930 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:30:55,931 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:30:55,931 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-06-27 20:30:55,931 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-27 20:30:55,931 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:30:55,931 INFO L85 PathProgramCache]: Analyzing trace with hash -128967183, now seen corresponding path program 3 times [2024-06-27 20:30:55,931 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:30:55,932 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1633689442] [2024-06-27 20:30:55,932 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:30:55,932 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:30:55,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:30:56,835 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:30:56,835 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:30:56,835 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1633689442] [2024-06-27 20:30:56,836 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1633689442] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:30:56,836 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:30:56,836 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 20:30:56,836 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1857044736] [2024-06-27 20:30:56,836 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:30:56,836 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 20:30:56,837 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:30:56,837 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 20:30:56,837 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-27 20:30:56,963 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 53 [2024-06-27 20:30:56,963 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 78 places, 89 transitions, 583 flow. Second operand has 8 states, 8 states have (on average 13.375) internal successors, (107), 8 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:30:56,963 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:30:56,963 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 53 [2024-06-27 20:30:56,963 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:30:58,892 INFO L124 PetriNetUnfolderBase]: 13381/18467 cut-off events. [2024-06-27 20:30:58,892 INFO L125 PetriNetUnfolderBase]: For 108174/108174 co-relation queries the response was YES. [2024-06-27 20:30:58,942 INFO L83 FinitePrefix]: Finished finitePrefix Result has 73858 conditions, 18467 events. 13381/18467 cut-off events. For 108174/108174 co-relation queries the response was YES. Maximal size of possible extension queue 614. Compared 101111 event pairs, 6723 based on Foata normal form. 6/18290 useless extension candidates. Maximal degree in co-relation 73833. Up to 17960 conditions per place. [2024-06-27 20:30:59,012 INFO L140 encePairwiseOnDemand]: 40/53 looper letters, 98 selfloop transitions, 18 changer transitions 0/122 dead transitions. [2024-06-27 20:30:59,012 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 84 places, 122 transitions, 903 flow [2024-06-27 20:30:59,013 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 20:30:59,013 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 20:30:59,013 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 172 transitions. [2024-06-27 20:30:59,013 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4636118598382749 [2024-06-27 20:30:59,014 INFO L175 Difference]: Start difference. First operand has 78 places, 89 transitions, 583 flow. Second operand 7 states and 172 transitions. [2024-06-27 20:30:59,014 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 84 places, 122 transitions, 903 flow [2024-06-27 20:30:59,060 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 81 places, 122 transitions, 819 flow, removed 32 selfloop flow, removed 3 redundant places. [2024-06-27 20:30:59,061 INFO L231 Difference]: Finished difference. Result has 82 places, 89 transitions, 546 flow [2024-06-27 20:30:59,062 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=499, PETRI_DIFFERENCE_MINUEND_PLACES=75, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=89, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=71, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=546, PETRI_PLACES=82, PETRI_TRANSITIONS=89} [2024-06-27 20:30:59,062 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 26 predicate places. [2024-06-27 20:30:59,062 INFO L495 AbstractCegarLoop]: Abstraction has has 82 places, 89 transitions, 546 flow [2024-06-27 20:30:59,063 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.375) internal successors, (107), 8 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:30:59,063 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:30:59,063 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:30:59,063 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-06-27 20:30:59,063 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-27 20:30:59,063 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:30:59,063 INFO L85 PathProgramCache]: Analyzing trace with hash 40486091, now seen corresponding path program 1 times [2024-06-27 20:30:59,064 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:30:59,064 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [797440159] [2024-06-27 20:30:59,064 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:30:59,064 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:30:59,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:31:00,365 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:31:00,366 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:31:00,366 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [797440159] [2024-06-27 20:31:00,366 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [797440159] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:31:00,366 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:31:00,366 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:31:00,366 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [963959936] [2024-06-27 20:31:00,366 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:31:00,367 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:31:00,367 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:31:00,367 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:31:00,367 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:31:00,467 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 53 [2024-06-27 20:31:00,468 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 82 places, 89 transitions, 546 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) [2024-06-27 20:31:00,468 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:31:00,468 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 53 [2024-06-27 20:31:00,468 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:31:02,660 INFO L124 PetriNetUnfolderBase]: 16245/22118 cut-off events. [2024-06-27 20:31:02,661 INFO L125 PetriNetUnfolderBase]: For 142763/142763 co-relation queries the response was YES. [2024-06-27 20:31:02,736 INFO L83 FinitePrefix]: Finished finitePrefix Result has 88600 conditions, 22118 events. 16245/22118 cut-off events. For 142763/142763 co-relation queries the response was YES. Maximal size of possible extension queue 682. Compared 118420 event pairs, 8182 based on Foata normal form. 6/21990 useless extension candidates. Maximal degree in co-relation 88573. Up to 21765 conditions per place. [2024-06-27 20:31:02,826 INFO L140 encePairwiseOnDemand]: 42/53 looper letters, 103 selfloop transitions, 20 changer transitions 0/128 dead transitions. [2024-06-27 20:31:02,826 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 88 places, 128 transitions, 949 flow [2024-06-27 20:31:02,826 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 20:31:02,827 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 20:31:02,827 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 165 transitions. [2024-06-27 20:31:02,827 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.444743935309973 [2024-06-27 20:31:02,827 INFO L175 Difference]: Start difference. First operand has 82 places, 89 transitions, 546 flow. Second operand 7 states and 165 transitions. [2024-06-27 20:31:02,827 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 88 places, 128 transitions, 949 flow [2024-06-27 20:31:02,873 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 82 places, 128 transitions, 883 flow, removed 6 selfloop flow, removed 6 redundant places. [2024-06-27 20:31:02,874 INFO L231 Difference]: Finished difference. Result has 84 places, 96 transitions, 618 flow [2024-06-27 20:31:02,875 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=487, PETRI_DIFFERENCE_MINUEND_PLACES=76, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=89, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=72, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=618, PETRI_PLACES=84, PETRI_TRANSITIONS=96} [2024-06-27 20:31:02,875 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 28 predicate places. [2024-06-27 20:31:02,875 INFO L495 AbstractCegarLoop]: Abstraction has has 84 places, 96 transitions, 618 flow [2024-06-27 20:31:02,876 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) [2024-06-27 20:31:02,876 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:31:02,876 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:31:02,876 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-06-27 20:31:02,876 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-27 20:31:02,876 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:31:02,876 INFO L85 PathProgramCache]: Analyzing trace with hash -827292957, now seen corresponding path program 1 times [2024-06-27 20:31:02,877 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:31:02,877 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [195816272] [2024-06-27 20:31:02,877 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:31:02,877 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:31:02,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:31:03,429 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:31:03,429 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:31:03,429 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [195816272] [2024-06-27 20:31:03,429 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [195816272] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:31:03,429 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:31:03,429 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 20:31:03,429 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [105698406] [2024-06-27 20:31:03,429 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:31:03,429 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 20:31:03,430 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:31:03,430 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 20:31:03,430 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-06-27 20:31:03,515 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 53 [2024-06-27 20:31:03,515 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 84 places, 96 transitions, 618 flow. Second operand has 6 states, 6 states have (on average 14.0) internal successors, (84), 6 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) [2024-06-27 20:31:03,516 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:31:03,516 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 53 [2024-06-27 20:31:03,516 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:31:05,460 INFO L124 PetriNetUnfolderBase]: 15376/21382 cut-off events. [2024-06-27 20:31:05,461 INFO L125 PetriNetUnfolderBase]: For 166046/166052 co-relation queries the response was YES. [2024-06-27 20:31:05,535 INFO L83 FinitePrefix]: Finished finitePrefix Result has 90631 conditions, 21382 events. 15376/21382 cut-off events. For 166046/166052 co-relation queries the response was YES. Maximal size of possible extension queue 696. Compared 119068 event pairs, 8277 based on Foata normal form. 8/21135 useless extension candidates. Maximal degree in co-relation 90602. Up to 20778 conditions per place. [2024-06-27 20:31:05,623 INFO L140 encePairwiseOnDemand]: 44/53 looper letters, 95 selfloop transitions, 10 changer transitions 0/114 dead transitions. [2024-06-27 20:31:05,623 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 88 places, 114 transitions, 904 flow [2024-06-27 20:31:05,624 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 20:31:05,624 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 20:31:05,624 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 120 transitions. [2024-06-27 20:31:05,624 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4528301886792453 [2024-06-27 20:31:05,625 INFO L175 Difference]: Start difference. First operand has 84 places, 96 transitions, 618 flow. Second operand 5 states and 120 transitions. [2024-06-27 20:31:05,625 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 88 places, 114 transitions, 904 flow [2024-06-27 20:31:05,696 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 84 places, 114 transitions, 834 flow, removed 18 selfloop flow, removed 4 redundant places. [2024-06-27 20:31:05,698 INFO L231 Difference]: Finished difference. Result has 85 places, 100 transitions, 625 flow [2024-06-27 20:31:05,698 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=548, PETRI_DIFFERENCE_MINUEND_PLACES=80, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=96, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=86, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=625, PETRI_PLACES=85, PETRI_TRANSITIONS=100} [2024-06-27 20:31:05,698 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 29 predicate places. [2024-06-27 20:31:05,698 INFO L495 AbstractCegarLoop]: Abstraction has has 85 places, 100 transitions, 625 flow [2024-06-27 20:31:05,699 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 14.0) internal successors, (84), 6 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) [2024-06-27 20:31:05,699 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:31:05,699 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:31:05,699 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-06-27 20:31:05,699 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-27 20:31:05,699 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:31:05,699 INFO L85 PathProgramCache]: Analyzing trace with hash 47516826, now seen corresponding path program 1 times [2024-06-27 20:31:05,700 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:31:05,700 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [655920773] [2024-06-27 20:31:05,700 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:31:05,700 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:31:05,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:31:06,823 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:31:06,823 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:31:06,823 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [655920773] [2024-06-27 20:31:06,823 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [655920773] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:31:06,823 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:31:06,823 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:31:06,823 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [265287990] [2024-06-27 20:31:06,823 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:31:06,823 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:31:06,824 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:31:06,824 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:31:06,824 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:31:06,935 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 53 [2024-06-27 20:31:06,935 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 85 places, 100 transitions, 625 flow. Second operand has 9 states, 9 states have (on average 13.333333333333334) internal successors, (120), 9 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:31:06,935 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:31:06,935 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 53 [2024-06-27 20:31:06,935 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:31:09,245 INFO L124 PetriNetUnfolderBase]: 16009/22023 cut-off events. [2024-06-27 20:31:09,245 INFO L125 PetriNetUnfolderBase]: For 194470/194470 co-relation queries the response was YES. [2024-06-27 20:31:09,292 INFO L83 FinitePrefix]: Finished finitePrefix Result has 97473 conditions, 22023 events. 16009/22023 cut-off events. For 194470/194470 co-relation queries the response was YES. Maximal size of possible extension queue 714. Compared 121978 event pairs, 7940 based on Foata normal form. 6/21830 useless extension candidates. Maximal degree in co-relation 97443. Up to 21382 conditions per place. [2024-06-27 20:31:09,366 INFO L140 encePairwiseOnDemand]: 40/53 looper letters, 131 selfloop transitions, 30 changer transitions 0/168 dead transitions. [2024-06-27 20:31:09,366 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 93 places, 168 transitions, 1287 flow [2024-06-27 20:31:09,366 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:31:09,366 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:31:09,367 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 232 transitions. [2024-06-27 20:31:09,367 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4863731656184486 [2024-06-27 20:31:09,367 INFO L175 Difference]: Start difference. First operand has 85 places, 100 transitions, 625 flow. Second operand 9 states and 232 transitions. [2024-06-27 20:31:09,367 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 93 places, 168 transitions, 1287 flow [2024-06-27 20:31:09,418 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 90 places, 168 transitions, 1240 flow, removed 16 selfloop flow, removed 3 redundant places. [2024-06-27 20:31:09,419 INFO L231 Difference]: Finished difference. Result has 91 places, 108 transitions, 769 flow [2024-06-27 20:31:09,420 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=578, PETRI_DIFFERENCE_MINUEND_PLACES=82, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=100, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=74, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=769, PETRI_PLACES=91, PETRI_TRANSITIONS=108} [2024-06-27 20:31:09,420 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 35 predicate places. [2024-06-27 20:31:09,420 INFO L495 AbstractCegarLoop]: Abstraction has has 91 places, 108 transitions, 769 flow [2024-06-27 20:31:09,420 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 13.333333333333334) internal successors, (120), 9 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:31:09,420 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:31:09,421 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:31:09,421 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-06-27 20:31:09,421 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-27 20:31:09,421 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:31:09,421 INFO L85 PathProgramCache]: Analyzing trace with hash -1619614438, now seen corresponding path program 2 times [2024-06-27 20:31:09,421 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:31:09,421 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1034881974] [2024-06-27 20:31:09,422 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:31:09,422 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:31:09,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:31:10,532 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:31:10,532 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:31:10,532 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1034881974] [2024-06-27 20:31:10,532 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1034881974] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:31:10,532 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:31:10,532 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:31:10,532 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [542531147] [2024-06-27 20:31:10,532 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:31:10,533 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:31:10,533 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:31:10,533 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:31:10,533 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:31:10,672 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 53 [2024-06-27 20:31:10,673 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 91 places, 108 transitions, 769 flow. Second operand has 9 states, 9 states have (on average 13.333333333333334) internal successors, (120), 9 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:31:10,673 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:31:10,673 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 53 [2024-06-27 20:31:10,673 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:31:12,896 INFO L124 PetriNetUnfolderBase]: 15991/22039 cut-off events. [2024-06-27 20:31:12,896 INFO L125 PetriNetUnfolderBase]: For 230405/230405 co-relation queries the response was YES. [2024-06-27 20:31:12,979 INFO L83 FinitePrefix]: Finished finitePrefix Result has 102372 conditions, 22039 events. 15991/22039 cut-off events. For 230405/230405 co-relation queries the response was YES. Maximal size of possible extension queue 719. Compared 122216 event pairs, 7947 based on Foata normal form. 6/21826 useless extension candidates. Maximal degree in co-relation 102341. Up to 21418 conditions per place. [2024-06-27 20:31:13,073 INFO L140 encePairwiseOnDemand]: 40/53 looper letters, 125 selfloop transitions, 22 changer transitions 0/154 dead transitions. [2024-06-27 20:31:13,074 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 98 places, 154 transitions, 1185 flow [2024-06-27 20:31:13,074 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:31:13,074 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:31:13,074 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 201 transitions. [2024-06-27 20:31:13,075 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4740566037735849 [2024-06-27 20:31:13,075 INFO L175 Difference]: Start difference. First operand has 91 places, 108 transitions, 769 flow. Second operand 8 states and 201 transitions. [2024-06-27 20:31:13,075 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 98 places, 154 transitions, 1185 flow [2024-06-27 20:31:13,192 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 93 places, 154 transitions, 1073 flow, removed 45 selfloop flow, removed 5 redundant places. [2024-06-27 20:31:13,194 INFO L231 Difference]: Finished difference. Result has 94 places, 108 transitions, 712 flow [2024-06-27 20:31:13,194 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=657, PETRI_DIFFERENCE_MINUEND_PLACES=86, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=108, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=86, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=712, PETRI_PLACES=94, PETRI_TRANSITIONS=108} [2024-06-27 20:31:13,194 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 38 predicate places. [2024-06-27 20:31:13,195 INFO L495 AbstractCegarLoop]: Abstraction has has 94 places, 108 transitions, 712 flow [2024-06-27 20:31:13,195 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 13.333333333333334) internal successors, (120), 9 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:31:13,195 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:31:13,195 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:31:13,195 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-06-27 20:31:13,195 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-27 20:31:13,196 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:31:13,196 INFO L85 PathProgramCache]: Analyzing trace with hash -2021430164, now seen corresponding path program 3 times [2024-06-27 20:31:13,196 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:31:13,196 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1209734018] [2024-06-27 20:31:13,196 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:31:13,196 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:31:13,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:31:14,534 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:31:14,534 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:31:14,535 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1209734018] [2024-06-27 20:31:14,535 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1209734018] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:31:14,535 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:31:14,535 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:31:14,535 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [400413353] [2024-06-27 20:31:14,535 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:31:14,535 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:31:14,535 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:31:14,535 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:31:14,536 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:31:14,661 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 53 [2024-06-27 20:31:14,661 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 94 places, 108 transitions, 712 flow. Second operand has 9 states, 9 states have (on average 13.333333333333334) internal successors, (120), 9 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:31:14,661 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:31:14,661 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 53 [2024-06-27 20:31:14,661 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:31:16,767 INFO L124 PetriNetUnfolderBase]: 16035/22094 cut-off events. [2024-06-27 20:31:16,767 INFO L125 PetriNetUnfolderBase]: For 253227/253227 co-relation queries the response was YES. [2024-06-27 20:31:16,854 INFO L83 FinitePrefix]: Finished finitePrefix Result has 104251 conditions, 22094 events. 16035/22094 cut-off events. For 253227/253227 co-relation queries the response was YES. Maximal size of possible extension queue 719. Compared 122478 event pairs, 7656 based on Foata normal form. 6/21877 useless extension candidates. Maximal degree in co-relation 104218. Up to 21319 conditions per place. [2024-06-27 20:31:16,948 INFO L140 encePairwiseOnDemand]: 39/53 looper letters, 108 selfloop transitions, 42 changer transitions 0/157 dead transitions. [2024-06-27 20:31:16,949 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 101 places, 157 transitions, 1198 flow [2024-06-27 20:31:16,949 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:31:16,949 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:31:16,950 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 204 transitions. [2024-06-27 20:31:16,950 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4811320754716981 [2024-06-27 20:31:16,950 INFO L175 Difference]: Start difference. First operand has 94 places, 108 transitions, 712 flow. Second operand 8 states and 204 transitions. [2024-06-27 20:31:16,950 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 101 places, 157 transitions, 1198 flow [2024-06-27 20:31:17,089 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 94 places, 157 transitions, 1143 flow, removed 3 selfloop flow, removed 7 redundant places. [2024-06-27 20:31:17,091 INFO L231 Difference]: Finished difference. Result has 95 places, 112 transitions, 824 flow [2024-06-27 20:31:17,091 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=657, PETRI_DIFFERENCE_MINUEND_PLACES=87, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=108, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=66, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=824, PETRI_PLACES=95, PETRI_TRANSITIONS=112} [2024-06-27 20:31:17,092 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 39 predicate places. [2024-06-27 20:31:17,092 INFO L495 AbstractCegarLoop]: Abstraction has has 95 places, 112 transitions, 824 flow [2024-06-27 20:31:17,092 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 13.333333333333334) internal successors, (120), 9 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:31:17,092 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:31:17,092 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:31:17,092 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-06-27 20:31:17,092 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-27 20:31:17,093 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:31:17,093 INFO L85 PathProgramCache]: Analyzing trace with hash 795687256, now seen corresponding path program 4 times [2024-06-27 20:31:17,093 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:31:17,093 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [445281779] [2024-06-27 20:31:17,093 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:31:17,093 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:31:17,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:31:18,233 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:31:18,233 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:31:18,233 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [445281779] [2024-06-27 20:31:18,233 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [445281779] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:31:18,234 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:31:18,234 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:31:18,234 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [518381473] [2024-06-27 20:31:18,234 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:31:18,234 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:31:18,234 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:31:18,235 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:31:18,235 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:31:18,361 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 53 [2024-06-27 20:31:18,361 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 95 places, 112 transitions, 824 flow. Second operand has 9 states, 9 states have (on average 13.333333333333334) internal successors, (120), 9 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:31:18,361 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:31:18,361 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 53 [2024-06-27 20:31:18,361 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:31:21,244 INFO L124 PetriNetUnfolderBase]: 16098/22113 cut-off events. [2024-06-27 20:31:21,244 INFO L125 PetriNetUnfolderBase]: For 292292/292292 co-relation queries the response was YES. [2024-06-27 20:31:21,322 INFO L83 FinitePrefix]: Finished finitePrefix Result has 109686 conditions, 22113 events. 16098/22113 cut-off events. For 292292/292292 co-relation queries the response was YES. Maximal size of possible extension queue 712. Compared 122085 event pairs, 7555 based on Foata normal form. 9/21930 useless extension candidates. Maximal degree in co-relation 109652. Up to 21506 conditions per place. [2024-06-27 20:31:21,412 INFO L140 encePairwiseOnDemand]: 39/53 looper letters, 125 selfloop transitions, 25 changer transitions 0/157 dead transitions. [2024-06-27 20:31:21,412 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 102 places, 157 transitions, 1306 flow [2024-06-27 20:31:21,424 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:31:21,425 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:31:21,425 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 196 transitions. [2024-06-27 20:31:21,426 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46226415094339623 [2024-06-27 20:31:21,426 INFO L175 Difference]: Start difference. First operand has 95 places, 112 transitions, 824 flow. Second operand 8 states and 196 transitions. [2024-06-27 20:31:21,426 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 102 places, 157 transitions, 1306 flow [2024-06-27 20:31:21,551 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 96 places, 157 transitions, 1171 flow, removed 28 selfloop flow, removed 6 redundant places. [2024-06-27 20:31:21,552 INFO L231 Difference]: Finished difference. Result has 97 places, 116 transitions, 830 flow [2024-06-27 20:31:21,552 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=689, PETRI_DIFFERENCE_MINUEND_PLACES=89, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=112, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=87, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=830, PETRI_PLACES=97, PETRI_TRANSITIONS=116} [2024-06-27 20:31:21,553 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 41 predicate places. [2024-06-27 20:31:21,553 INFO L495 AbstractCegarLoop]: Abstraction has has 97 places, 116 transitions, 830 flow [2024-06-27 20:31:21,553 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 13.333333333333334) internal successors, (120), 9 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:31:21,553 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:31:21,553 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:31:21,553 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-06-27 20:31:21,555 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-27 20:31:21,555 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:31:21,555 INFO L85 PathProgramCache]: Analyzing trace with hash 1255060442, now seen corresponding path program 1 times [2024-06-27 20:31:21,555 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:31:21,555 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1779678741] [2024-06-27 20:31:21,555 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:31:21,555 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:31:21,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:31:22,777 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:31:22,777 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:31:22,777 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1779678741] [2024-06-27 20:31:22,777 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1779678741] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:31:22,778 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:31:22,778 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:31:22,778 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1623948045] [2024-06-27 20:31:22,778 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:31:22,778 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:31:22,778 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:31:22,779 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:31:22,779 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:31:22,906 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 53 [2024-06-27 20:31:22,906 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 97 places, 116 transitions, 830 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) [2024-06-27 20:31:22,906 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:31:22,906 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 53 [2024-06-27 20:31:22,907 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:31:25,687 INFO L124 PetriNetUnfolderBase]: 16475/22553 cut-off events. [2024-06-27 20:31:25,687 INFO L125 PetriNetUnfolderBase]: For 333134/333134 co-relation queries the response was YES. [2024-06-27 20:31:25,752 INFO L83 FinitePrefix]: Finished finitePrefix Result has 116040 conditions, 22553 events. 16475/22553 cut-off events. For 333134/333134 co-relation queries the response was YES. Maximal size of possible extension queue 692. Compared 121178 event pairs, 8160 based on Foata normal form. 3/22362 useless extension candidates. Maximal degree in co-relation 116005. Up to 22065 conditions per place. [2024-06-27 20:31:25,834 INFO L140 encePairwiseOnDemand]: 41/53 looper letters, 126 selfloop transitions, 25 changer transitions 0/156 dead transitions. [2024-06-27 20:31:25,834 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 103 places, 156 transitions, 1323 flow [2024-06-27 20:31:25,835 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 20:31:25,835 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 20:31:25,835 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 166 transitions. [2024-06-27 20:31:25,835 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4474393530997305 [2024-06-27 20:31:25,835 INFO L175 Difference]: Start difference. First operand has 97 places, 116 transitions, 830 flow. Second operand 7 states and 166 transitions. [2024-06-27 20:31:25,836 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 103 places, 156 transitions, 1323 flow [2024-06-27 20:31:25,947 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 97 places, 156 transitions, 1206 flow, removed 32 selfloop flow, removed 6 redundant places. [2024-06-27 20:31:25,949 INFO L231 Difference]: Finished difference. Result has 98 places, 124 transitions, 902 flow [2024-06-27 20:31:25,949 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=721, PETRI_DIFFERENCE_MINUEND_PLACES=91, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=116, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=91, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=902, PETRI_PLACES=98, PETRI_TRANSITIONS=124} [2024-06-27 20:31:25,950 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 42 predicate places. [2024-06-27 20:31:25,950 INFO L495 AbstractCegarLoop]: Abstraction has has 98 places, 124 transitions, 902 flow [2024-06-27 20:31:25,950 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) [2024-06-27 20:31:25,950 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:31:25,950 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:31:25,951 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-06-27 20:31:25,951 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-27 20:31:25,951 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:31:25,951 INFO L85 PathProgramCache]: Analyzing trace with hash 145172813, now seen corresponding path program 1 times [2024-06-27 20:31:25,952 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:31:25,952 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1299567546] [2024-06-27 20:31:25,952 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:31:25,952 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:31:25,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:31:26,601 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:31:26,601 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:31:26,601 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1299567546] [2024-06-27 20:31:26,601 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1299567546] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:31:26,601 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:31:26,601 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 20:31:26,601 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1939486141] [2024-06-27 20:31:26,601 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:31:26,602 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 20:31:26,602 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:31:26,602 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 20:31:26,602 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-27 20:31:26,686 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 53 [2024-06-27 20:31:26,686 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 98 places, 124 transitions, 902 flow. Second operand has 7 states, 7 states have (on average 13.857142857142858) internal successors, (97), 7 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) [2024-06-27 20:31:26,686 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:31:26,686 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 53 [2024-06-27 20:31:26,686 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:31:29,340 INFO L124 PetriNetUnfolderBase]: 15796/21903 cut-off events. [2024-06-27 20:31:29,340 INFO L125 PetriNetUnfolderBase]: For 373698/373730 co-relation queries the response was YES. [2024-06-27 20:31:29,407 INFO L83 FinitePrefix]: Finished finitePrefix Result has 117470 conditions, 21903 events. 15796/21903 cut-off events. For 373698/373730 co-relation queries the response was YES. Maximal size of possible extension queue 694. Compared 120690 event pairs, 8064 based on Foata normal form. 12/21867 useless extension candidates. Maximal degree in co-relation 117434. Up to 21090 conditions per place. [2024-06-27 20:31:29,493 INFO L140 encePairwiseOnDemand]: 42/53 looper letters, 127 selfloop transitions, 22 changer transitions 0/160 dead transitions. [2024-06-27 20:31:29,494 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 103 places, 160 transitions, 1460 flow [2024-06-27 20:31:29,494 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 20:31:29,494 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 20:31:29,494 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 148 transitions. [2024-06-27 20:31:29,495 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46540880503144655 [2024-06-27 20:31:29,495 INFO L175 Difference]: Start difference. First operand has 98 places, 124 transitions, 902 flow. Second operand 6 states and 148 transitions. [2024-06-27 20:31:29,495 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 103 places, 160 transitions, 1460 flow [2024-06-27 20:31:29,602 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 98 places, 160 transitions, 1368 flow, removed 26 selfloop flow, removed 5 redundant places. [2024-06-27 20:31:29,604 INFO L231 Difference]: Finished difference. Result has 101 places, 138 transitions, 1036 flow [2024-06-27 20:31:29,604 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=810, PETRI_DIFFERENCE_MINUEND_PLACES=93, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=124, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=109, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1036, PETRI_PLACES=101, PETRI_TRANSITIONS=138} [2024-06-27 20:31:29,605 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 45 predicate places. [2024-06-27 20:31:29,605 INFO L495 AbstractCegarLoop]: Abstraction has has 101 places, 138 transitions, 1036 flow [2024-06-27 20:31:29,605 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 13.857142857142858) internal successors, (97), 7 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) [2024-06-27 20:31:29,605 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:31:29,605 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:31:29,605 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2024-06-27 20:31:29,605 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-27 20:31:29,606 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:31:29,606 INFO L85 PathProgramCache]: Analyzing trace with hash 1642027550, now seen corresponding path program 1 times [2024-06-27 20:31:29,606 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:31:29,606 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [474314214] [2024-06-27 20:31:29,606 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:31:29,606 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:31:29,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:31:30,955 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:31:30,955 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:31:30,955 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [474314214] [2024-06-27 20:31:30,955 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [474314214] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:31:30,955 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:31:30,955 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:31:30,955 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [965955891] [2024-06-27 20:31:30,955 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:31:30,956 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:31:30,956 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:31:30,956 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:31:30,956 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:31:31,095 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 53 [2024-06-27 20:31:31,096 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 101 places, 138 transitions, 1036 flow. Second operand has 10 states, 10 states have (on average 13.3) internal successors, (133), 10 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:31:31,096 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:31:31,096 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 53 [2024-06-27 20:31:31,096 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:31:34,272 INFO L124 PetriNetUnfolderBase]: 16545/23056 cut-off events. [2024-06-27 20:31:34,273 INFO L125 PetriNetUnfolderBase]: For 464305/464305 co-relation queries the response was YES. [2024-06-27 20:31:34,358 INFO L83 FinitePrefix]: Finished finitePrefix Result has 131112 conditions, 23056 events. 16545/23056 cut-off events. For 464305/464305 co-relation queries the response was YES. Maximal size of possible extension queue 732. Compared 130721 event pairs, 6573 based on Foata normal form. 24/23076 useless extension candidates. Maximal degree in co-relation 131073. Up to 21684 conditions per place. [2024-06-27 20:31:34,456 INFO L140 encePairwiseOnDemand]: 40/53 looper letters, 174 selfloop transitions, 36 changer transitions 0/217 dead transitions. [2024-06-27 20:31:34,456 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 110 places, 217 transitions, 1918 flow [2024-06-27 20:31:34,456 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 20:31:34,457 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 20:31:34,457 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 260 transitions. [2024-06-27 20:31:34,458 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49056603773584906 [2024-06-27 20:31:34,458 INFO L175 Difference]: Start difference. First operand has 101 places, 138 transitions, 1036 flow. Second operand 10 states and 260 transitions. [2024-06-27 20:31:34,458 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 110 places, 217 transitions, 1918 flow [2024-06-27 20:31:34,636 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 109 places, 217 transitions, 1870 flow, removed 23 selfloop flow, removed 1 redundant places. [2024-06-27 20:31:34,638 INFO L231 Difference]: Finished difference. Result has 110 places, 142 transitions, 1197 flow [2024-06-27 20:31:34,638 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=988, PETRI_DIFFERENCE_MINUEND_PLACES=100, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=138, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=104, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1197, PETRI_PLACES=110, PETRI_TRANSITIONS=142} [2024-06-27 20:31:34,639 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 54 predicate places. [2024-06-27 20:31:34,639 INFO L495 AbstractCegarLoop]: Abstraction has has 110 places, 142 transitions, 1197 flow [2024-06-27 20:31:34,639 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 13.3) internal successors, (133), 10 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:31:34,639 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:31:34,639 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:31:34,639 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2024-06-27 20:31:34,639 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-27 20:31:34,640 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:31:34,640 INFO L85 PathProgramCache]: Analyzing trace with hash 1473022930, now seen corresponding path program 2 times [2024-06-27 20:31:34,640 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:31:34,640 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [964766659] [2024-06-27 20:31:34,640 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:31:34,640 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:31:34,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:31:36,074 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:31:36,074 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:31:36,074 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [964766659] [2024-06-27 20:31:36,074 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [964766659] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:31:36,074 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:31:36,074 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:31:36,074 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1240392997] [2024-06-27 20:31:36,075 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:31:36,075 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:31:36,075 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:31:36,075 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:31:36,075 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:31:36,223 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 53 [2024-06-27 20:31:36,223 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 110 places, 142 transitions, 1197 flow. Second operand has 10 states, 10 states have (on average 13.3) internal successors, (133), 10 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:31:36,223 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:31:36,223 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 53 [2024-06-27 20:31:36,223 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:31:39,519 INFO L124 PetriNetUnfolderBase]: 16604/23149 cut-off events. [2024-06-27 20:31:39,520 INFO L125 PetriNetUnfolderBase]: For 513928/513928 co-relation queries the response was YES. [2024-06-27 20:31:39,607 INFO L83 FinitePrefix]: Finished finitePrefix Result has 134555 conditions, 23149 events. 16604/23149 cut-off events. For 513928/513928 co-relation queries the response was YES. Maximal size of possible extension queue 731. Compared 131160 event pairs, 7345 based on Foata normal form. 54/23199 useless extension candidates. Maximal degree in co-relation 134513. Up to 21896 conditions per place. [2024-06-27 20:31:39,706 INFO L140 encePairwiseOnDemand]: 40/53 looper letters, 172 selfloop transitions, 34 changer transitions 0/213 dead transitions. [2024-06-27 20:31:39,706 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 119 places, 213 transitions, 1885 flow [2024-06-27 20:31:39,707 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 20:31:39,707 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 20:31:39,707 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 254 transitions. [2024-06-27 20:31:39,707 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47924528301886793 [2024-06-27 20:31:39,707 INFO L175 Difference]: Start difference. First operand has 110 places, 142 transitions, 1197 flow. Second operand 10 states and 254 transitions. [2024-06-27 20:31:39,707 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 119 places, 213 transitions, 1885 flow [2024-06-27 20:31:40,029 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 113 places, 213 transitions, 1806 flow, removed 22 selfloop flow, removed 6 redundant places. [2024-06-27 20:31:40,031 INFO L231 Difference]: Finished difference. Result has 114 places, 144 transitions, 1271 flow [2024-06-27 20:31:40,031 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=1118, PETRI_DIFFERENCE_MINUEND_PLACES=104, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=142, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=108, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1271, PETRI_PLACES=114, PETRI_TRANSITIONS=144} [2024-06-27 20:31:40,031 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 58 predicate places. [2024-06-27 20:31:40,031 INFO L495 AbstractCegarLoop]: Abstraction has has 114 places, 144 transitions, 1271 flow [2024-06-27 20:31:40,031 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 13.3) internal successors, (133), 10 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:31:40,031 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:31:40,031 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:31:40,032 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2024-06-27 20:31:40,032 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-27 20:31:40,032 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:31:40,032 INFO L85 PathProgramCache]: Analyzing trace with hash 1591295308, now seen corresponding path program 1 times [2024-06-27 20:31:40,032 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:31:40,032 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2021033837] [2024-06-27 20:31:40,032 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:31:40,032 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:31:40,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:31:41,413 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:31:41,414 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:31:41,414 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2021033837] [2024-06-27 20:31:41,414 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2021033837] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:31:41,414 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:31:41,414 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:31:41,414 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [97158615] [2024-06-27 20:31:41,414 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:31:41,414 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:31:41,414 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:31:41,415 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:31:41,415 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:31:41,524 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 53 [2024-06-27 20:31:41,524 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 114 places, 144 transitions, 1271 flow. Second operand has 10 states, 10 states have (on average 12.3) internal successors, (123), 10 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:31:41,524 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:31:41,524 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 53 [2024-06-27 20:31:41,525 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand