./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/pthread-wmm/safe035_power.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/safe035_power.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/safe035_power.i ./goblint.2024-06-19_11-23-25.files/protection/safe035_power.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 19:33:19,053 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-06-27 19:33:19,111 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-06-27 19:33:19,114 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-06-27 19:33:19,114 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-06-27 19:33:19,128 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-06-27 19:33:19,129 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-06-27 19:33:19,129 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-06-27 19:33:19,129 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-06-27 19:33:19,129 INFO L153 SettingsManager]: * Use memory slicer=true [2024-06-27 19:33:19,130 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-06-27 19:33:19,130 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-06-27 19:33:19,130 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-06-27 19:33:19,130 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-06-27 19:33:19,131 INFO L153 SettingsManager]: * Use SBE=true [2024-06-27 19:33:19,131 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-06-27 19:33:19,131 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-06-27 19:33:19,131 INFO L153 SettingsManager]: * sizeof long=4 [2024-06-27 19:33:19,132 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-06-27 19:33:19,132 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-06-27 19:33:19,132 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-06-27 19:33:19,133 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-06-27 19:33:19,133 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-06-27 19:33:19,133 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-06-27 19:33:19,134 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-06-27 19:33:19,134 INFO L153 SettingsManager]: * sizeof long double=12 [2024-06-27 19:33:19,134 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-06-27 19:33:19,134 INFO L153 SettingsManager]: * Use constant arrays=true [2024-06-27 19:33:19,135 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-06-27 19:33:19,135 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-06-27 19:33:19,135 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-06-27 19:33:19,140 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-06-27 19:33:19,140 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-27 19:33:19,141 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-06-27 19:33:19,141 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-06-27 19:33:19,141 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-06-27 19:33:19,141 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-06-27 19:33:19,141 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-06-27 19:33:19,142 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-06-27 19:33:19,142 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-06-27 19:33:19,142 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-06-27 19:33:19,142 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-06-27 19:33:19,143 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-06-27 19:33:19,143 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check unreachability of reach_error function -> false [2024-06-27 19:33:19,364 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-06-27 19:33:19,384 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-06-27 19:33:19,386 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-06-27 19:33:19,387 INFO L270 PluginConnector]: Initializing CDTParser... [2024-06-27 19:33:19,388 INFO L274 PluginConnector]: CDTParser initialized [2024-06-27 19:33:19,388 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-wmm/safe035_power.i [2024-06-27 19:33:20,441 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-06-27 19:33:20,646 INFO L384 CDTParser]: Found 1 translation units. [2024-06-27 19:33:20,660 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/safe035_power.i [2024-06-27 19:33:20,672 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/771df509b/0aafd4c2fade4e7ebd9ecef1763bc2a2/FLAG6b228368a [2024-06-27 19:33:20,683 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/771df509b/0aafd4c2fade4e7ebd9ecef1763bc2a2 [2024-06-27 19:33:20,685 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-06-27 19:33:20,686 INFO L274 PluginConnector]: Witness Parser initialized [2024-06-27 19:33:20,686 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/./goblint.2024-06-19_11-23-25.files/protection/safe035_power.yml/witness.yml [2024-06-27 19:33:20,841 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-06-27 19:33:20,842 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-06-27 19:33:20,842 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-06-27 19:33:20,842 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-06-27 19:33:20,846 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-06-27 19:33:20,846 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.06 07:33:20" (1/2) ... [2024-06-27 19:33:20,847 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@b40505a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 07:33:20, skipping insertion in model container [2024-06-27 19:33:20,847 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.06 07:33:20" (1/2) ... [2024-06-27 19:33:20,848 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@31565151 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 07:33:20, skipping insertion in model container [2024-06-27 19:33:20,848 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 27.06 07:33:20" (2/2) ... [2024-06-27 19:33:20,848 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@b40505a and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 07:33:20, skipping insertion in model container [2024-06-27 19:33:20,849 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 27.06 07:33:20" (2/2) ... [2024-06-27 19:33:20,849 INFO L83 nessWitnessExtractor]: Extracting all invariants from correctness witness [2024-06-27 19:33:20,957 INFO L95 edCorrectnessWitness]: Found the following entries in the witness: [2024-06-27 19:33:20,959 INFO L97 edCorrectnessWitness]: Location invariant before [L874-L874] (((((((((((((((((! multithreaded || 0 <= __unbuffered_cnt) && (! multithreaded || ((y == 0 || y == 1) || y == 2))) && (! multithreaded || (y$w_buff1 == 0 || y$w_buff1 == 1))) && (! multithreaded || y$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || y$read_delayed == (_Bool)0)) && (! multithreaded || y$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || ((__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1) || __unbuffered_p2_EAX == 2))) && (! multithreaded || (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1))) && (! multithreaded || y$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || ((__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1) || __unbuffered_p1_EAX == 2))) && (! multithreaded || y$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || ((y$mem_tmp == 0 || y$mem_tmp == 1) || y$mem_tmp == 2))) && (! multithreaded || (x == 0 || x == 1))) && (! multithreaded || y$flush_delayed == (_Bool)0)) && (! multithreaded || y$read_delayed_var == 0)) && (! multithreaded || (y$w_buff0 == 0 || y$w_buff0 == 1))) && (! multithreaded || y$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || y$r_buff1_thd0 == (_Bool)0) [2024-06-27 19:33:20,959 INFO L97 edCorrectnessWitness]: Location invariant before [L873-L873] (((((((((((((((((! multithreaded || 0 <= __unbuffered_cnt) && (! multithreaded || ((y == 0 || y == 1) || y == 2))) && (! multithreaded || (y$w_buff1 == 0 || y$w_buff1 == 1))) && (! multithreaded || y$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || y$read_delayed == (_Bool)0)) && (! multithreaded || y$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || ((__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1) || __unbuffered_p2_EAX == 2))) && (! multithreaded || (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1))) && (! multithreaded || y$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || ((__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1) || __unbuffered_p1_EAX == 2))) && (! multithreaded || y$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || ((y$mem_tmp == 0 || y$mem_tmp == 1) || y$mem_tmp == 2))) && (! multithreaded || (x == 0 || x == 1))) && (! multithreaded || y$flush_delayed == (_Bool)0)) && (! multithreaded || y$read_delayed_var == 0)) && (! multithreaded || (y$w_buff0 == 0 || y$w_buff0 == 1))) && (! multithreaded || y$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || y$r_buff1_thd0 == (_Bool)0) [2024-06-27 19:33:20,959 INFO L97 edCorrectnessWitness]: Location invariant before [L871-L871] (((((((((((((((((! multithreaded || 0 <= __unbuffered_cnt) && (! multithreaded || ((y == 0 || y == 1) || y == 2))) && (! multithreaded || (y$w_buff1 == 0 || y$w_buff1 == 1))) && (! multithreaded || y$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || y$read_delayed == (_Bool)0)) && (! multithreaded || y$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || ((__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1) || __unbuffered_p2_EAX == 2))) && (! multithreaded || (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1))) && (! multithreaded || y$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || ((__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1) || __unbuffered_p1_EAX == 2))) && (! multithreaded || y$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || ((y$mem_tmp == 0 || y$mem_tmp == 1) || y$mem_tmp == 2))) && (! multithreaded || (x == 0 || x == 1))) && (! multithreaded || y$flush_delayed == (_Bool)0)) && (! multithreaded || y$read_delayed_var == 0)) && (! multithreaded || (y$w_buff0 == 0 || y$w_buff0 == 1))) && (! multithreaded || y$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || y$r_buff1_thd0 == (_Bool)0) [2024-06-27 19:33:20,959 INFO L103 edCorrectnessWitness]: ghost_variable multithreaded = 0 [2024-06-27 19:33:20,959 INFO L106 edCorrectnessWitness]: ghost_update [L869-L869] multithreaded = 1; [2024-06-27 19:33:20,997 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-06-27 19:33:21,332 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-27 19:33:21,346 INFO L202 MainTranslator]: Completed pre-run Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local [2024-06-27 19:33:21,451 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-27 19:33:21,480 INFO L206 MainTranslator]: Completed translation [2024-06-27 19:33:21,480 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 07:33:21 WrapperNode [2024-06-27 19:33:21,480 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-06-27 19:33:21,481 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-06-27 19:33:21,481 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-06-27 19:33:21,481 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-06-27 19:33:21,486 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 07:33:21" (1/1) ... [2024-06-27 19:33:21,508 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 07:33:21" (1/1) ... [2024-06-27 19:33:21,551 INFO L138 Inliner]: procedures = 175, calls = 49, calls flagged for inlining = 6, calls inlined = 7, statements flattened = 175 [2024-06-27 19:33:21,552 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-06-27 19:33:21,553 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-06-27 19:33:21,553 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-06-27 19:33:21,553 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-06-27 19:33:21,561 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 07:33:21" (1/1) ... [2024-06-27 19:33:21,561 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 07:33:21" (1/1) ... [2024-06-27 19:33:21,567 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 07:33:21" (1/1) ... [2024-06-27 19:33:21,581 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 19:33:21,581 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 07:33:21" (1/1) ... [2024-06-27 19:33:21,582 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 07:33:21" (1/1) ... [2024-06-27 19:33:21,591 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 07:33:21" (1/1) ... [2024-06-27 19:33:21,593 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 07:33:21" (1/1) ... [2024-06-27 19:33:21,595 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 07:33:21" (1/1) ... [2024-06-27 19:33:21,596 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 07:33:21" (1/1) ... [2024-06-27 19:33:21,599 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-06-27 19:33:21,600 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-06-27 19:33:21,600 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-06-27 19:33:21,600 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-06-27 19:33:21,601 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 07:33:21" (1/1) ... [2024-06-27 19:33:21,606 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-27 19:33:21,612 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 19:33:21,672 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 19:33:21,707 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 19:33:21,714 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-06-27 19:33:21,715 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-06-27 19:33:21,715 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2024-06-27 19:33:21,715 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2024-06-27 19:33:21,716 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2024-06-27 19:33:21,716 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2024-06-27 19:33:21,716 INFO L130 BoogieDeclarations]: Found specification of procedure P2 [2024-06-27 19:33:21,716 INFO L138 BoogieDeclarations]: Found implementation of procedure P2 [2024-06-27 19:33:21,716 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-06-27 19:33:21,716 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-06-27 19:33:21,716 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-06-27 19:33:21,716 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-06-27 19:33:21,718 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 19:33:21,849 INFO L244 CfgBuilder]: Building ICFG [2024-06-27 19:33:21,851 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-06-27 19:33:22,195 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-06-27 19:33:22,195 INFO L293 CfgBuilder]: Performing block encoding [2024-06-27 19:33:22,403 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-06-27 19:33:22,403 INFO L320 CfgBuilder]: Removed 0 assume(true) statements. [2024-06-27 19:33:22,404 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.06 07:33:22 BoogieIcfgContainer [2024-06-27 19:33:22,404 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-06-27 19:33:22,407 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-06-27 19:33:22,407 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-06-27 19:33:22,410 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-06-27 19:33:22,410 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.06 07:33:20" (1/4) ... [2024-06-27 19:33:22,410 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6a5435e5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.06 07:33:22, skipping insertion in model container [2024-06-27 19:33:22,411 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 27.06 07:33:20" (2/4) ... [2024-06-27 19:33:22,411 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6a5435e5 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 27.06 07:33:22, skipping insertion in model container [2024-06-27 19:33:22,412 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 07:33:21" (3/4) ... [2024-06-27 19:33:22,412 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6a5435e5 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 27.06 07:33:22, skipping insertion in model container [2024-06-27 19:33:22,412 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.06 07:33:22" (4/4) ... [2024-06-27 19:33:22,413 INFO L112 eAbstractionObserver]: Analyzing ICFG safe035_power.i [2024-06-27 19:33:22,427 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-06-27 19:33:22,428 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 3 error locations. [2024-06-27 19:33:22,428 INFO L522 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-06-27 19:33:22,467 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-06-27 19:33:22,495 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 53 places, 43 transitions, 98 flow [2024-06-27 19:33:22,524 INFO L124 PetriNetUnfolderBase]: 0/40 cut-off events. [2024-06-27 19:33:22,525 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-27 19:33:22,526 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50 conditions, 40 events. 0/40 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 71 event pairs, 0 based on Foata normal form. 0/37 useless extension candidates. Maximal degree in co-relation 0. Up to 1 conditions per place. [2024-06-27 19:33:22,526 INFO L82 GeneralOperation]: Start removeDead. Operand has 53 places, 43 transitions, 98 flow [2024-06-27 19:33:22,530 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 44 places, 34 transitions, 77 flow [2024-06-27 19:33:22,541 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-06-27 19:33:22,549 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;@1eb59b8c, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-06-27 19:33:22,549 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2024-06-27 19:33:22,553 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-06-27 19:33:22,553 INFO L124 PetriNetUnfolderBase]: 0/5 cut-off events. [2024-06-27 19:33:22,553 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-27 19:33:22,553 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:33:22,554 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2024-06-27 19:33:22,554 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:33:22,558 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:33:22,558 INFO L85 PathProgramCache]: Analyzing trace with hash 480640100, now seen corresponding path program 1 times [2024-06-27 19:33:22,602 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:33:22,602 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2052416400] [2024-06-27 19:33:22,602 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:33:22,603 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:33:22,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:33:23,304 INFO 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 19:33:23,304 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:33:23,304 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2052416400] [2024-06-27 19:33:23,305 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2052416400] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:33:23,305 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:33:23,305 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-06-27 19:33:23,306 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [787120356] [2024-06-27 19:33:23,307 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:33:23,312 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-06-27 19:33:23,316 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:33:23,333 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-06-27 19:33:23,334 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-06-27 19:33:23,361 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-27 19:33:23,363 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 34 transitions, 77 flow. Second operand has 3 states, 3 states have (on average 11.333333333333334) internal successors, (34), 3 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:33:23,363 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:33:23,363 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-27 19:33:23,364 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:33:23,912 INFO L124 PetriNetUnfolderBase]: 2252/3336 cut-off events. [2024-06-27 19:33:23,913 INFO L125 PetriNetUnfolderBase]: For 47/47 co-relation queries the response was YES. [2024-06-27 19:33:23,920 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6763 conditions, 3336 events. 2252/3336 cut-off events. For 47/47 co-relation queries the response was YES. Maximal size of possible extension queue 138. Compared 15955 event pairs, 1635 based on Foata normal form. 1/3288 useless extension candidates. Maximal degree in co-relation 6751. Up to 3316 conditions per place. [2024-06-27 19:33:23,936 INFO L140 encePairwiseOnDemand]: 36/43 looper letters, 35 selfloop transitions, 4 changer transitions 0/44 dead transitions. [2024-06-27 19:33:23,937 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 44 transitions, 181 flow [2024-06-27 19:33:23,938 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-06-27 19:33:23,940 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-06-27 19:33:23,946 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 72 transitions. [2024-06-27 19:33:23,947 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5581395348837209 [2024-06-27 19:33:23,948 INFO L175 Difference]: Start difference. First operand has 44 places, 34 transitions, 77 flow. Second operand 3 states and 72 transitions. [2024-06-27 19:33:23,949 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 44 transitions, 181 flow [2024-06-27 19:33:23,951 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 43 places, 44 transitions, 176 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-06-27 19:33:23,955 INFO L231 Difference]: Finished difference. Result has 44 places, 37 transitions, 104 flow [2024-06-27 19:33:23,957 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=74, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=34, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=104, PETRI_PLACES=44, PETRI_TRANSITIONS=37} [2024-06-27 19:33:23,960 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 0 predicate places. [2024-06-27 19:33:23,960 INFO L495 AbstractCegarLoop]: Abstraction has has 44 places, 37 transitions, 104 flow [2024-06-27 19:33:23,960 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 11.333333333333334) internal successors, (34), 3 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:33:23,960 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:33:23,961 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:33:23,961 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-06-27 19:33:23,961 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:33:23,961 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:33:23,962 INFO L85 PathProgramCache]: Analyzing trace with hash -1961314621, now seen corresponding path program 1 times [2024-06-27 19:33:23,962 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:33:23,962 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1765381390] [2024-06-27 19:33:23,962 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:33:23,962 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:33:23,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:33:24,401 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:33:24,402 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:33:24,402 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1765381390] [2024-06-27 19:33:24,402 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1765381390] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:33:24,402 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:33:24,403 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-06-27 19:33:24,403 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [272948424] [2024-06-27 19:33:24,403 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:33:24,404 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-27 19:33:24,404 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:33:24,404 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-27 19:33:24,405 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-06-27 19:33:24,435 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-27 19:33:24,436 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 37 transitions, 104 flow. Second operand has 4 states, 4 states have (on average 11.25) internal successors, (45), 4 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:33:24,436 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:33:24,436 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-27 19:33:24,436 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:33:24,810 INFO L124 PetriNetUnfolderBase]: 2234/3309 cut-off events. [2024-06-27 19:33:24,811 INFO L125 PetriNetUnfolderBase]: For 648/648 co-relation queries the response was YES. [2024-06-27 19:33:24,815 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7494 conditions, 3309 events. 2234/3309 cut-off events. For 648/648 co-relation queries the response was YES. Maximal size of possible extension queue 138. Compared 15896 event pairs, 1159 based on Foata normal form. 9/3316 useless extension candidates. Maximal degree in co-relation 7482. Up to 3244 conditions per place. [2024-06-27 19:33:24,825 INFO L140 encePairwiseOnDemand]: 35/43 looper letters, 44 selfloop transitions, 7 changer transitions 0/56 dead transitions. [2024-06-27 19:33:24,826 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 47 places, 56 transitions, 256 flow [2024-06-27 19:33:24,826 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-27 19:33:24,826 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-27 19:33:24,829 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 94 transitions. [2024-06-27 19:33:24,829 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5465116279069767 [2024-06-27 19:33:24,830 INFO L175 Difference]: Start difference. First operand has 44 places, 37 transitions, 104 flow. Second operand 4 states and 94 transitions. [2024-06-27 19:33:24,830 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 47 places, 56 transitions, 256 flow [2024-06-27 19:33:24,831 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 46 places, 56 transitions, 252 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-06-27 19:33:24,833 INFO L231 Difference]: Finished difference. Result has 47 places, 40 transitions, 140 flow [2024-06-27 19:33:24,833 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=100, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=140, PETRI_PLACES=47, PETRI_TRANSITIONS=40} [2024-06-27 19:33:24,834 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 3 predicate places. [2024-06-27 19:33:24,834 INFO L495 AbstractCegarLoop]: Abstraction has has 47 places, 40 transitions, 140 flow [2024-06-27 19:33:24,834 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 11.25) internal successors, (45), 4 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:33:24,834 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:33:24,835 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:33:24,837 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-06-27 19:33:24,838 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:33:24,838 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:33:24,838 INFO L85 PathProgramCache]: Analyzing trace with hash -795775373, now seen corresponding path program 1 times [2024-06-27 19:33:24,839 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:33:24,842 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [560263506] [2024-06-27 19:33:24,843 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:33:24,843 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:33:24,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:33:25,349 INFO 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 19:33:25,349 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:33:25,349 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [560263506] [2024-06-27 19:33:25,349 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [560263506] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:33:25,350 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:33:25,350 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 19:33:25,350 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1704047426] [2024-06-27 19:33:25,350 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:33:25,350 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 19:33:25,351 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:33:25,351 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 19:33:25,351 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-06-27 19:33:25,400 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 43 [2024-06-27 19:33:25,400 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 47 places, 40 transitions, 140 flow. Second operand has 6 states, 6 states have (on average 8.5) internal successors, (51), 6 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:33:25,401 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:33:25,401 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 43 [2024-06-27 19:33:25,401 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:33:25,960 INFO L124 PetriNetUnfolderBase]: 2614/3849 cut-off events. [2024-06-27 19:33:25,961 INFO L125 PetriNetUnfolderBase]: For 1997/1997 co-relation queries the response was YES. [2024-06-27 19:33:25,965 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9562 conditions, 3849 events. 2614/3849 cut-off events. For 1997/1997 co-relation queries the response was YES. Maximal size of possible extension queue 150. Compared 18061 event pairs, 1732 based on Foata normal form. 8/3855 useless extension candidates. Maximal degree in co-relation 9547. Up to 3801 conditions per place. [2024-06-27 19:33:25,979 INFO L140 encePairwiseOnDemand]: 35/43 looper letters, 46 selfloop transitions, 8 changer transitions 0/57 dead transitions. [2024-06-27 19:33:25,980 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 51 places, 57 transitions, 294 flow [2024-06-27 19:33:25,980 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 19:33:25,981 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 19:33:25,981 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 88 transitions. [2024-06-27 19:33:25,982 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40930232558139534 [2024-06-27 19:33:25,982 INFO L175 Difference]: Start difference. First operand has 47 places, 40 transitions, 140 flow. Second operand 5 states and 88 transitions. [2024-06-27 19:33:25,982 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 51 places, 57 transitions, 294 flow [2024-06-27 19:33:25,983 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 49 places, 57 transitions, 280 flow, removed 2 selfloop flow, removed 2 redundant places. [2024-06-27 19:33:25,984 INFO L231 Difference]: Finished difference. Result has 50 places, 43 transitions, 168 flow [2024-06-27 19:33:25,984 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=126, PETRI_DIFFERENCE_MINUEND_PLACES=45, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=168, PETRI_PLACES=50, PETRI_TRANSITIONS=43} [2024-06-27 19:33:25,985 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 6 predicate places. [2024-06-27 19:33:25,985 INFO L495 AbstractCegarLoop]: Abstraction has has 50 places, 43 transitions, 168 flow [2024-06-27 19:33:25,985 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 8.5) internal successors, (51), 6 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:33:25,985 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:33:25,986 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:33:25,986 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-06-27 19:33:25,986 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:33:25,986 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:33:25,986 INFO L85 PathProgramCache]: Analyzing trace with hash 1336143745, now seen corresponding path program 1 times [2024-06-27 19:33:25,987 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:33:25,987 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2005309216] [2024-06-27 19:33:25,987 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:33:25,987 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:33:26,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:33:27,168 INFO 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 19:33:27,168 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:33:27,168 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2005309216] [2024-06-27 19:33:27,168 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2005309216] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:33:27,169 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:33:27,169 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 19:33:27,169 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1135705262] [2024-06-27 19:33:27,169 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:33:27,169 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 19:33:27,170 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:33:27,170 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 19:33:27,170 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-27 19:33:27,221 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-27 19:33:27,222 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 50 places, 43 transitions, 168 flow. Second operand has 7 states, 7 states have (on average 10.285714285714286) internal successors, (72), 7 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:33:27,222 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:33:27,222 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-27 19:33:27,222 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:33:27,707 INFO L124 PetriNetUnfolderBase]: 2605/3834 cut-off events. [2024-06-27 19:33:27,707 INFO L125 PetriNetUnfolderBase]: For 3451/3451 co-relation queries the response was YES. [2024-06-27 19:33:27,711 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10315 conditions, 3834 events. 2605/3834 cut-off events. For 3451/3451 co-relation queries the response was YES. Maximal size of possible extension queue 152. Compared 17914 event pairs, 969 based on Foata normal form. 6/3838 useless extension candidates. Maximal degree in co-relation 10299. Up to 3732 conditions per place. [2024-06-27 19:33:27,722 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 59 selfloop transitions, 12 changer transitions 0/75 dead transitions. [2024-06-27 19:33:27,722 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 54 places, 75 transitions, 398 flow [2024-06-27 19:33:27,723 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 19:33:27,723 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 19:33:27,723 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 125 transitions. [2024-06-27 19:33:27,724 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4844961240310077 [2024-06-27 19:33:27,724 INFO L175 Difference]: Start difference. First operand has 50 places, 43 transitions, 168 flow. Second operand 6 states and 125 transitions. [2024-06-27 19:33:27,724 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 54 places, 75 transitions, 398 flow [2024-06-27 19:33:27,725 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 51 places, 75 transitions, 380 flow, removed 3 selfloop flow, removed 3 redundant places. [2024-06-27 19:33:27,726 INFO L231 Difference]: Finished difference. Result has 53 places, 47 transitions, 209 flow [2024-06-27 19:33:27,727 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=144, PETRI_DIFFERENCE_MINUEND_PLACES=46, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=209, PETRI_PLACES=53, PETRI_TRANSITIONS=47} [2024-06-27 19:33:27,727 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 9 predicate places. [2024-06-27 19:33:27,727 INFO L495 AbstractCegarLoop]: Abstraction has has 53 places, 47 transitions, 209 flow [2024-06-27 19:33:27,728 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 10.285714285714286) internal successors, (72), 7 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:33:27,728 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:33:27,728 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:33:27,728 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-06-27 19:33:27,728 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:33:27,728 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:33:27,729 INFO L85 PathProgramCache]: Analyzing trace with hash -242573038, now seen corresponding path program 1 times [2024-06-27 19:33:27,729 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:33:27,729 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1168358262] [2024-06-27 19:33:27,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:33:27,729 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:33:27,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:33:28,175 INFO 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 19:33:28,176 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:33:28,176 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1168358262] [2024-06-27 19:33:28,176 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1168358262] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:33:28,176 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:33:28,176 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 19:33:28,176 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [30317289] [2024-06-27 19:33:28,176 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:33:28,177 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 19:33:28,177 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:33:28,177 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 19:33:28,178 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-27 19:33:28,223 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 43 [2024-06-27 19:33:28,223 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 53 places, 47 transitions, 209 flow. Second operand has 7 states, 7 states have (on average 8.428571428571429) internal successors, (59), 7 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:33:28,224 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:33:28,224 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 43 [2024-06-27 19:33:28,224 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:33:28,958 INFO L124 PetriNetUnfolderBase]: 2649/3899 cut-off events. [2024-06-27 19:33:28,958 INFO L125 PetriNetUnfolderBase]: For 5768/5768 co-relation queries the response was YES. [2024-06-27 19:33:28,963 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11304 conditions, 3899 events. 2649/3899 cut-off events. For 5768/5768 co-relation queries the response was YES. Maximal size of possible extension queue 150. Compared 18297 event pairs, 1185 based on Foata normal form. 8/3904 useless extension candidates. Maximal degree in co-relation 11286. Up to 3730 conditions per place. [2024-06-27 19:33:28,974 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 62 selfloop transitions, 16 changer transitions 0/81 dead transitions. [2024-06-27 19:33:28,974 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 58 places, 81 transitions, 483 flow [2024-06-27 19:33:28,975 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 19:33:28,975 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 19:33:28,975 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 110 transitions. [2024-06-27 19:33:28,976 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4263565891472868 [2024-06-27 19:33:28,976 INFO L175 Difference]: Start difference. First operand has 53 places, 47 transitions, 209 flow. Second operand 6 states and 110 transitions. [2024-06-27 19:33:28,976 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 58 places, 81 transitions, 483 flow [2024-06-27 19:33:28,979 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 55 places, 81 transitions, 454 flow, removed 5 selfloop flow, removed 3 redundant places. [2024-06-27 19:33:28,980 INFO L231 Difference]: Finished difference. Result has 57 places, 56 transitions, 278 flow [2024-06-27 19:33:28,980 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=180, PETRI_DIFFERENCE_MINUEND_PLACES=50, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=47, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=278, PETRI_PLACES=57, PETRI_TRANSITIONS=56} [2024-06-27 19:33:28,980 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 13 predicate places. [2024-06-27 19:33:28,981 INFO L495 AbstractCegarLoop]: Abstraction has has 57 places, 56 transitions, 278 flow [2024-06-27 19:33:28,981 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 8.428571428571429) internal successors, (59), 7 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:33:28,981 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:33:28,981 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:33:28,981 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-06-27 19:33:28,981 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:33:28,982 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:33:28,982 INFO L85 PathProgramCache]: Analyzing trace with hash 1919172220, now seen corresponding path program 2 times [2024-06-27 19:33:28,982 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:33:28,982 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1234268866] [2024-06-27 19:33:28,982 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:33:28,982 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:33:28,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:33:29,429 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 19:33:29,429 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:33:29,429 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1234268866] [2024-06-27 19:33:29,429 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1234268866] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:33:29,430 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:33:29,430 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 19:33:29,430 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1835578700] [2024-06-27 19:33:29,430 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:33:29,430 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 19:33:29,431 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:33:29,431 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 19:33:29,431 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-27 19:33:29,463 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 43 [2024-06-27 19:33:29,464 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 57 places, 56 transitions, 278 flow. Second operand has 7 states, 7 states have (on average 8.428571428571429) internal successors, (59), 7 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:33:29,464 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:33:29,464 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 43 [2024-06-27 19:33:29,464 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:33:30,093 INFO L124 PetriNetUnfolderBase]: 2629/3873 cut-off events. [2024-06-27 19:33:30,093 INFO L125 PetriNetUnfolderBase]: For 8213/8215 co-relation queries the response was YES. [2024-06-27 19:33:30,100 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12062 conditions, 3873 events. 2629/3873 cut-off events. For 8213/8215 co-relation queries the response was YES. Maximal size of possible extension queue 150. Compared 18158 event pairs, 1187 based on Foata normal form. 10/3879 useless extension candidates. Maximal degree in co-relation 12041. Up to 3718 conditions per place. [2024-06-27 19:33:30,111 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 57 selfloop transitions, 16 changer transitions 0/76 dead transitions. [2024-06-27 19:33:30,111 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 62 places, 76 transitions, 472 flow [2024-06-27 19:33:30,111 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 19:33:30,112 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 19:33:30,112 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 105 transitions. [2024-06-27 19:33:30,112 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4069767441860465 [2024-06-27 19:33:30,112 INFO L175 Difference]: Start difference. First operand has 57 places, 56 transitions, 278 flow. Second operand 6 states and 105 transitions. [2024-06-27 19:33:30,113 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 62 places, 76 transitions, 472 flow [2024-06-27 19:33:30,119 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 61 places, 76 transitions, 452 flow, removed 9 selfloop flow, removed 1 redundant places. [2024-06-27 19:33:30,120 INFO L231 Difference]: Finished difference. Result has 62 places, 56 transitions, 298 flow [2024-06-27 19:33:30,120 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=258, PETRI_DIFFERENCE_MINUEND_PLACES=56, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=56, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=298, PETRI_PLACES=62, PETRI_TRANSITIONS=56} [2024-06-27 19:33:30,120 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 18 predicate places. [2024-06-27 19:33:30,121 INFO L495 AbstractCegarLoop]: Abstraction has has 62 places, 56 transitions, 298 flow [2024-06-27 19:33:30,121 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 8.428571428571429) internal successors, (59), 7 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:33:30,121 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:33:30,121 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:33:30,121 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-06-27 19:33:30,121 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:33:30,122 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:33:30,122 INFO L85 PathProgramCache]: Analyzing trace with hash 144986928, now seen corresponding path program 1 times [2024-06-27 19:33:30,122 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:33:30,122 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1038380011] [2024-06-27 19:33:30,122 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:33:30,122 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:33:30,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:33:30,610 INFO 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 19:33:30,610 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:33:30,610 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1038380011] [2024-06-27 19:33:30,610 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1038380011] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:33:30,610 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:33:30,611 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 19:33:30,611 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [878428118] [2024-06-27 19:33:30,611 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:33:30,611 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 19:33:30,611 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:33:30,612 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 19:33:30,612 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-27 19:33:30,667 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-27 19:33:30,667 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 62 places, 56 transitions, 298 flow. Second operand has 6 states, 6 states have (on average 10.0) internal successors, (60), 6 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:33:30,667 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:33:30,667 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-27 19:33:30,667 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:33:31,092 INFO L124 PetriNetUnfolderBase]: 2478/3718 cut-off events. [2024-06-27 19:33:31,092 INFO L125 PetriNetUnfolderBase]: For 9333/9333 co-relation queries the response was YES. [2024-06-27 19:33:31,098 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11810 conditions, 3718 events. 2478/3718 cut-off events. For 9333/9333 co-relation queries the response was YES. Maximal size of possible extension queue 152. Compared 17980 event pairs, 1400 based on Foata normal form. 1/3717 useless extension candidates. Maximal degree in co-relation 11786. Up to 3662 conditions per place. [2024-06-27 19:33:31,108 INFO L140 encePairwiseOnDemand]: 36/43 looper letters, 52 selfloop transitions, 8 changer transitions 0/67 dead transitions. [2024-06-27 19:33:31,108 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 66 places, 67 transitions, 454 flow [2024-06-27 19:33:31,108 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 19:33:31,109 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 19:33:31,109 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 84 transitions. [2024-06-27 19:33:31,109 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39069767441860465 [2024-06-27 19:33:31,109 INFO L175 Difference]: Start difference. First operand has 62 places, 56 transitions, 298 flow. Second operand 5 states and 84 transitions. [2024-06-27 19:33:31,109 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 66 places, 67 transitions, 454 flow [2024-06-27 19:33:31,113 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 61 places, 67 transitions, 418 flow, removed 2 selfloop flow, removed 5 redundant places. [2024-06-27 19:33:31,114 INFO L231 Difference]: Finished difference. Result has 62 places, 59 transitions, 306 flow [2024-06-27 19:33:31,114 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=262, PETRI_DIFFERENCE_MINUEND_PLACES=57, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=56, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=306, PETRI_PLACES=62, PETRI_TRANSITIONS=59} [2024-06-27 19:33:31,114 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 18 predicate places. [2024-06-27 19:33:31,114 INFO L495 AbstractCegarLoop]: Abstraction has has 62 places, 59 transitions, 306 flow [2024-06-27 19:33:31,115 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 10.0) internal successors, (60), 6 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:33:31,115 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:33:31,115 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:33:31,115 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-06-27 19:33:31,115 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:33:31,115 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:33:31,115 INFO L85 PathProgramCache]: Analyzing trace with hash -1189167183, now seen corresponding path program 1 times [2024-06-27 19:33:31,116 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:33:31,116 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1200511060] [2024-06-27 19:33:31,116 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:33:31,116 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:33:31,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:33:32,009 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:33:32,009 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:33:32,009 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1200511060] [2024-06-27 19:33:32,010 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1200511060] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:33:32,010 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:33:32,010 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 19:33:32,010 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1297141665] [2024-06-27 19:33:32,010 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:33:32,010 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 19:33:32,011 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:33:32,011 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 19:33:32,011 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-27 19:33:32,091 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 43 [2024-06-27 19:33:32,091 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 62 places, 59 transitions, 306 flow. Second operand has 9 states, 9 states have (on average 8.333333333333334) internal successors, (75), 9 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:33:32,091 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:33:32,091 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 43 [2024-06-27 19:33:32,091 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:33:32,805 INFO L124 PetriNetUnfolderBase]: 2670/3930 cut-off events. [2024-06-27 19:33:32,805 INFO L125 PetriNetUnfolderBase]: For 12240/12240 co-relation queries the response was YES. [2024-06-27 19:33:32,812 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13134 conditions, 3930 events. 2670/3930 cut-off events. For 12240/12240 co-relation queries the response was YES. Maximal size of possible extension queue 151. Compared 18440 event pairs, 1046 based on Foata normal form. 8/3936 useless extension candidates. Maximal degree in co-relation 13110. Up to 3812 conditions per place. [2024-06-27 19:33:32,824 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 74 selfloop transitions, 14 changer transitions 0/91 dead transitions. [2024-06-27 19:33:32,827 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 68 places, 91 transitions, 574 flow [2024-06-27 19:33:32,828 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 19:33:32,828 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 19:33:32,828 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 122 transitions. [2024-06-27 19:33:32,828 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4053156146179402 [2024-06-27 19:33:32,829 INFO L175 Difference]: Start difference. First operand has 62 places, 59 transitions, 306 flow. Second operand 7 states and 122 transitions. [2024-06-27 19:33:32,829 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 68 places, 91 transitions, 574 flow [2024-06-27 19:33:32,835 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 65 places, 91 transitions, 552 flow, removed 5 selfloop flow, removed 3 redundant places. [2024-06-27 19:33:32,837 INFO L231 Difference]: Finished difference. Result has 66 places, 62 transitions, 346 flow [2024-06-27 19:33:32,838 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=284, PETRI_DIFFERENCE_MINUEND_PLACES=59, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=59, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=346, PETRI_PLACES=66, PETRI_TRANSITIONS=62} [2024-06-27 19:33:32,840 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 22 predicate places. [2024-06-27 19:33:32,840 INFO L495 AbstractCegarLoop]: Abstraction has has 66 places, 62 transitions, 346 flow [2024-06-27 19:33:32,841 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.333333333333334) internal successors, (75), 9 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:33:32,841 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:33:32,841 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:33:32,841 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-06-27 19:33:32,841 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:33:32,841 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:33:32,841 INFO L85 PathProgramCache]: Analyzing trace with hash -1923007055, now seen corresponding path program 2 times [2024-06-27 19:33:32,842 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:33:32,842 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [970818019] [2024-06-27 19:33:32,842 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:33:32,845 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:33:32,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:33:33,724 INFO 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 19:33:33,724 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:33:33,725 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [970818019] [2024-06-27 19:33:33,725 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [970818019] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:33:33,725 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:33:33,725 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 19:33:33,725 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1087964667] [2024-06-27 19:33:33,725 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:33:33,726 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 19:33:33,726 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:33:33,727 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 19:33:33,727 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-27 19:33:33,822 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 43 [2024-06-27 19:33:33,823 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 62 transitions, 346 flow. Second operand has 9 states, 9 states have (on average 8.333333333333334) internal successors, (75), 9 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:33:33,823 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:33:33,823 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 43 [2024-06-27 19:33:33,823 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:33:34,620 INFO L124 PetriNetUnfolderBase]: 2714/3995 cut-off events. [2024-06-27 19:33:34,621 INFO L125 PetriNetUnfolderBase]: For 15755/15755 co-relation queries the response was YES. [2024-06-27 19:33:34,626 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14231 conditions, 3995 events. 2714/3995 cut-off events. For 15755/15755 co-relation queries the response was YES. Maximal size of possible extension queue 150. Compared 18801 event pairs, 932 based on Foata normal form. 8/4000 useless extension candidates. Maximal degree in co-relation 14206. Up to 3658 conditions per place. [2024-06-27 19:33:34,636 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 72 selfloop transitions, 26 changer transitions 0/101 dead transitions. [2024-06-27 19:33:34,636 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 72 places, 101 transitions, 702 flow [2024-06-27 19:33:34,637 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 19:33:34,637 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 19:33:34,638 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 130 transitions. [2024-06-27 19:33:34,638 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4318936877076412 [2024-06-27 19:33:34,638 INFO L175 Difference]: Start difference. First operand has 66 places, 62 transitions, 346 flow. Second operand 7 states and 130 transitions. [2024-06-27 19:33:34,638 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 72 places, 101 transitions, 702 flow [2024-06-27 19:33:34,645 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 67 places, 101 transitions, 664 flow, removed 7 selfloop flow, removed 5 redundant places. [2024-06-27 19:33:34,647 INFO L231 Difference]: Finished difference. Result has 68 places, 68 transitions, 426 flow [2024-06-27 19:33:34,647 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=308, PETRI_DIFFERENCE_MINUEND_PLACES=61, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=62, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=426, PETRI_PLACES=68, PETRI_TRANSITIONS=68} [2024-06-27 19:33:34,647 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 24 predicate places. [2024-06-27 19:33:34,647 INFO L495 AbstractCegarLoop]: Abstraction has has 68 places, 68 transitions, 426 flow [2024-06-27 19:33:34,648 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.333333333333334) internal successors, (75), 9 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:33:34,648 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:33:34,648 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:33:34,648 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-06-27 19:33:34,648 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:33:34,648 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:33:34,649 INFO L85 PathProgramCache]: Analyzing trace with hash -1922827131, now seen corresponding path program 1 times [2024-06-27 19:33:34,649 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:33:34,649 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1509385162] [2024-06-27 19:33:34,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:33:34,649 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:33:34,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:33:35,628 INFO 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 19:33:35,629 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:33:35,629 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1509385162] [2024-06-27 19:33:35,629 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1509385162] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:33:35,629 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:33:35,629 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 19:33:35,629 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [970764736] [2024-06-27 19:33:35,629 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:33:35,630 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 19:33:35,630 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:33:35,630 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 19:33:35,631 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-27 19:33:35,697 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 43 [2024-06-27 19:33:35,698 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 68 places, 68 transitions, 426 flow. Second operand has 9 states, 9 states have (on average 8.333333333333334) internal successors, (75), 9 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:33:35,698 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:33:35,698 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 43 [2024-06-27 19:33:35,698 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:33:36,436 INFO L124 PetriNetUnfolderBase]: 2758/4059 cut-off events. [2024-06-27 19:33:36,437 INFO L125 PetriNetUnfolderBase]: For 20560/20560 co-relation queries the response was YES. [2024-06-27 19:33:36,444 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15287 conditions, 4059 events. 2758/4059 cut-off events. For 20560/20560 co-relation queries the response was YES. Maximal size of possible extension queue 150. Compared 19173 event pairs, 1056 based on Foata normal form. 8/4064 useless extension candidates. Maximal degree in co-relation 15261. Up to 3770 conditions per place. [2024-06-27 19:33:36,457 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 81 selfloop transitions, 23 changer transitions 0/107 dead transitions. [2024-06-27 19:33:36,457 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 74 places, 107 transitions, 794 flow [2024-06-27 19:33:36,458 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 19:33:36,458 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 19:33:36,458 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 130 transitions. [2024-06-27 19:33:36,458 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4318936877076412 [2024-06-27 19:33:36,459 INFO L175 Difference]: Start difference. First operand has 68 places, 68 transitions, 426 flow. Second operand 7 states and 130 transitions. [2024-06-27 19:33:36,459 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 74 places, 107 transitions, 794 flow [2024-06-27 19:33:36,469 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 71 places, 107 transitions, 758 flow, removed 10 selfloop flow, removed 3 redundant places. [2024-06-27 19:33:36,470 INFO L231 Difference]: Finished difference. Result has 72 places, 74 transitions, 498 flow [2024-06-27 19:33:36,470 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=390, PETRI_DIFFERENCE_MINUEND_PLACES=65, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=68, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=498, PETRI_PLACES=72, PETRI_TRANSITIONS=74} [2024-06-27 19:33:36,471 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 28 predicate places. [2024-06-27 19:33:36,471 INFO L495 AbstractCegarLoop]: Abstraction has has 72 places, 74 transitions, 498 flow [2024-06-27 19:33:36,471 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.333333333333334) internal successors, (75), 9 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:33:36,471 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:33:36,472 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:33:36,472 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-06-27 19:33:36,472 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:33:36,472 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:33:36,472 INFO L85 PathProgramCache]: Analyzing trace with hash 881096019, now seen corresponding path program 3 times [2024-06-27 19:33:36,472 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:33:36,473 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1683827654] [2024-06-27 19:33:36,473 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:33:36,473 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:33:36,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:33:37,344 INFO 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 19:33:37,344 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:33:37,344 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1683827654] [2024-06-27 19:33:37,344 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1683827654] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:33:37,344 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:33:37,345 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 19:33:37,345 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [392035010] [2024-06-27 19:33:37,345 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:33:37,345 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 19:33:37,345 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:33:37,345 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 19:33:37,346 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2024-06-27 19:33:37,403 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 43 [2024-06-27 19:33:37,403 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 72 places, 74 transitions, 498 flow. Second operand has 9 states, 9 states have (on average 8.333333333333334) internal successors, (75), 9 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:33:37,403 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:33:37,403 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 43 [2024-06-27 19:33:37,403 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:33:38,161 INFO L124 PetriNetUnfolderBase]: 2738/4035 cut-off events. [2024-06-27 19:33:38,161 INFO L125 PetriNetUnfolderBase]: For 24371/24377 co-relation queries the response was YES. [2024-06-27 19:33:38,169 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15941 conditions, 4035 events. 2738/4035 cut-off events. For 24371/24377 co-relation queries the response was YES. Maximal size of possible extension queue 152. Compared 19046 event pairs, 869 based on Foata normal form. 14/4045 useless extension candidates. Maximal degree in co-relation 15913. Up to 3710 conditions per place. [2024-06-27 19:33:38,181 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 73 selfloop transitions, 26 changer transitions 0/102 dead transitions. [2024-06-27 19:33:38,181 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 78 places, 102 transitions, 762 flow [2024-06-27 19:33:38,182 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 19:33:38,182 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 19:33:38,182 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 125 transitions. [2024-06-27 19:33:38,182 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4152823920265781 [2024-06-27 19:33:38,183 INFO L175 Difference]: Start difference. First operand has 72 places, 74 transitions, 498 flow. Second operand 7 states and 125 transitions. [2024-06-27 19:33:38,183 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 78 places, 102 transitions, 762 flow [2024-06-27 19:33:38,196 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 75 places, 102 transitions, 718 flow, removed 15 selfloop flow, removed 3 redundant places. [2024-06-27 19:33:38,197 INFO L231 Difference]: Finished difference. Result has 76 places, 74 transitions, 514 flow [2024-06-27 19:33:38,197 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=454, PETRI_DIFFERENCE_MINUEND_PLACES=69, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=74, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=514, PETRI_PLACES=76, PETRI_TRANSITIONS=74} [2024-06-27 19:33:38,198 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 32 predicate places. [2024-06-27 19:33:38,198 INFO L495 AbstractCegarLoop]: Abstraction has has 76 places, 74 transitions, 514 flow [2024-06-27 19:33:38,198 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.333333333333334) internal successors, (75), 9 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:33:38,198 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:33:38,199 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:33:38,199 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-06-27 19:33:38,199 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:33:38,199 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:33:38,199 INFO L85 PathProgramCache]: Analyzing trace with hash 935164915, now seen corresponding path program 2 times [2024-06-27 19:33:38,199 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:33:38,199 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [648882847] [2024-06-27 19:33:38,200 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:33:38,200 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:33:38,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:33:39,017 INFO 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 19:33:39,017 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:33:39,017 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [648882847] [2024-06-27 19:33:39,017 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [648882847] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:33:39,017 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:33:39,017 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:33:39,017 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [200784317] [2024-06-27 19:33:39,018 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:33:39,018 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:33:39,018 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:33:39,018 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:33:39,018 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:33:39,066 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 43 [2024-06-27 19:33:39,066 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 76 places, 74 transitions, 514 flow. Second operand has 8 states, 8 states have (on average 8.5) internal successors, (68), 8 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:33:39,066 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:33:39,066 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 43 [2024-06-27 19:33:39,066 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:33:39,711 INFO L124 PetriNetUnfolderBase]: 2782/4097 cut-off events. [2024-06-27 19:33:39,711 INFO L125 PetriNetUnfolderBase]: For 28396/28398 co-relation queries the response was YES. [2024-06-27 19:33:39,719 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16616 conditions, 4097 events. 2782/4097 cut-off events. For 28396/28398 co-relation queries the response was YES. Maximal size of possible extension queue 150. Compared 19373 event pairs, 1036 based on Foata normal form. 10/4103 useless extension candidates. Maximal degree in co-relation 16586. Up to 3770 conditions per place. [2024-06-27 19:33:39,733 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 78 selfloop transitions, 26 changer transitions 0/107 dead transitions. [2024-06-27 19:33:39,733 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 82 places, 107 transitions, 864 flow [2024-06-27 19:33:39,734 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 19:33:39,734 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 19:33:39,734 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 127 transitions. [2024-06-27 19:33:39,735 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4219269102990033 [2024-06-27 19:33:39,735 INFO L175 Difference]: Start difference. First operand has 76 places, 74 transitions, 514 flow. Second operand 7 states and 127 transitions. [2024-06-27 19:33:39,735 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 82 places, 107 transitions, 864 flow [2024-06-27 19:33:39,751 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 76 places, 107 transitions, 796 flow, removed 4 selfloop flow, removed 6 redundant places. [2024-06-27 19:33:39,753 INFO L231 Difference]: Finished difference. Result has 77 places, 77 transitions, 536 flow [2024-06-27 19:33:39,753 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=446, PETRI_DIFFERENCE_MINUEND_PLACES=70, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=74, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=536, PETRI_PLACES=77, PETRI_TRANSITIONS=77} [2024-06-27 19:33:39,753 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 33 predicate places. [2024-06-27 19:33:39,754 INFO L495 AbstractCegarLoop]: Abstraction has has 77 places, 77 transitions, 536 flow [2024-06-27 19:33:39,754 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.5) internal successors, (68), 8 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:33:39,754 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:33:39,754 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:33:39,754 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-06-27 19:33:39,754 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:33:39,755 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:33:39,755 INFO L85 PathProgramCache]: Analyzing trace with hash -1011669739, now seen corresponding path program 3 times [2024-06-27 19:33:39,755 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:33:39,755 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [287991963] [2024-06-27 19:33:39,755 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:33:39,755 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:33:39,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:33:40,577 INFO 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 19:33:40,577 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:33:40,577 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [287991963] [2024-06-27 19:33:40,577 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [287991963] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:33:40,577 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:33:40,577 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:33:40,578 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1901333344] [2024-06-27 19:33:40,578 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:33:40,578 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:33:40,578 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:33:40,579 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:33:40,579 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:33:40,655 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 43 [2024-06-27 19:33:40,656 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 77 places, 77 transitions, 536 flow. Second operand has 8 states, 8 states have (on average 8.5) internal successors, (68), 8 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:33:40,656 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:33:40,656 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 43 [2024-06-27 19:33:40,656 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:33:41,347 INFO L124 PetriNetUnfolderBase]: 2762/4066 cut-off events. [2024-06-27 19:33:41,347 INFO L125 PetriNetUnfolderBase]: For 31610/31610 co-relation queries the response was YES. [2024-06-27 19:33:41,354 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16755 conditions, 4066 events. 2762/4066 cut-off events. For 31610/31610 co-relation queries the response was YES. Maximal size of possible extension queue 150. Compared 19110 event pairs, 1270 based on Foata normal form. 8/4072 useless extension candidates. Maximal degree in co-relation 16724. Up to 3972 conditions per place. [2024-06-27 19:33:41,363 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 83 selfloop transitions, 14 changer transitions 0/100 dead transitions. [2024-06-27 19:33:41,363 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 83 places, 100 transitions, 786 flow [2024-06-27 19:33:41,364 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 19:33:41,364 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 19:33:41,364 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 116 transitions. [2024-06-27 19:33:41,365 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3853820598006645 [2024-06-27 19:33:41,365 INFO L175 Difference]: Start difference. First operand has 77 places, 77 transitions, 536 flow. Second operand 7 states and 116 transitions. [2024-06-27 19:33:41,365 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 83 places, 100 transitions, 786 flow [2024-06-27 19:33:41,386 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 78 places, 100 transitions, 702 flow, removed 15 selfloop flow, removed 5 redundant places. [2024-06-27 19:33:41,387 INFO L231 Difference]: Finished difference. Result has 79 places, 77 transitions, 488 flow [2024-06-27 19:33:41,388 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=452, PETRI_DIFFERENCE_MINUEND_PLACES=72, 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=7, PETRI_FLOW=488, PETRI_PLACES=79, PETRI_TRANSITIONS=77} [2024-06-27 19:33:41,388 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 35 predicate places. [2024-06-27 19:33:41,388 INFO L495 AbstractCegarLoop]: Abstraction has has 79 places, 77 transitions, 488 flow [2024-06-27 19:33:41,388 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.5) internal successors, (68), 8 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:33:41,388 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:33:41,389 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:33:41,389 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-06-27 19:33:41,389 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:33:41,389 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:33:41,389 INFO L85 PathProgramCache]: Analyzing trace with hash 935472497, now seen corresponding path program 1 times [2024-06-27 19:33:41,389 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:33:41,389 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1943019948] [2024-06-27 19:33:41,390 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:33:41,390 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:33:41,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:33:42,581 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:33:42,581 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:33:42,582 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1943019948] [2024-06-27 19:33:42,582 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1943019948] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:33:42,582 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:33:42,582 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 19:33:42,582 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1353728239] [2024-06-27 19:33:42,582 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:33:42,582 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 19:33:42,583 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:33:42,583 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 19:33:42,583 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-27 19:33:42,709 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 43 [2024-06-27 19:33:42,709 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 79 places, 77 transitions, 488 flow. Second operand has 10 states, 10 states have (on average 8.3) internal successors, (83), 10 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:33:42,709 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:33:42,710 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 43 [2024-06-27 19:33:42,710 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:33:43,340 INFO L124 PetriNetUnfolderBase]: 2754/4054 cut-off events. [2024-06-27 19:33:43,340 INFO L125 PetriNetUnfolderBase]: For 34657/34657 co-relation queries the response was YES. [2024-06-27 19:33:43,349 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16792 conditions, 4054 events. 2754/4054 cut-off events. For 34657/34657 co-relation queries the response was YES. Maximal size of possible extension queue 150. Compared 19094 event pairs, 1248 based on Foata normal form. 4/4056 useless extension candidates. Maximal degree in co-relation 16760. Up to 3988 conditions per place. [2024-06-27 19:33:43,363 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 85 selfloop transitions, 13 changer transitions 0/101 dead transitions. [2024-06-27 19:33:43,363 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 85 places, 101 transitions, 764 flow [2024-06-27 19:33:43,363 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 19:33:43,363 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 19:33:43,364 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 114 transitions. [2024-06-27 19:33:43,364 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3787375415282392 [2024-06-27 19:33:43,364 INFO L175 Difference]: Start difference. First operand has 79 places, 77 transitions, 488 flow. Second operand 7 states and 114 transitions. [2024-06-27 19:33:43,364 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 85 places, 101 transitions, 764 flow [2024-06-27 19:33:43,387 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 77 places, 101 transitions, 704 flow, removed 5 selfloop flow, removed 8 redundant places. [2024-06-27 19:33:43,389 INFO L231 Difference]: Finished difference. Result has 78 places, 79 transitions, 491 flow [2024-06-27 19:33:43,389 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=428, PETRI_DIFFERENCE_MINUEND_PLACES=71, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=77, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=64, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=491, PETRI_PLACES=78, PETRI_TRANSITIONS=79} [2024-06-27 19:33:43,389 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 34 predicate places. [2024-06-27 19:33:43,390 INFO L495 AbstractCegarLoop]: Abstraction has has 78 places, 79 transitions, 491 flow [2024-06-27 19:33:43,390 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.3) internal successors, (83), 10 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:33:43,390 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:33:43,390 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:33:43,390 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-06-27 19:33:43,390 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:33:43,391 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:33:43,391 INFO L85 PathProgramCache]: Analyzing trace with hash 199629376, now seen corresponding path program 1 times [2024-06-27 19:33:43,391 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:33:43,391 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [828200348] [2024-06-27 19:33:43,391 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:33:43,391 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:33:43,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:33:44,056 INFO 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 19:33:44,056 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:33:44,056 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [828200348] [2024-06-27 19:33:44,056 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [828200348] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:33:44,056 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:33:44,056 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 19:33:44,057 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2123144692] [2024-06-27 19:33:44,057 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:33:44,057 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 19:33:44,057 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:33:44,057 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 19:33:44,058 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-27 19:33:44,094 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-27 19:33:44,094 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 78 places, 79 transitions, 491 flow. Second operand has 7 states, 7 states have (on average 9.857142857142858) internal successors, (69), 7 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:33:44,094 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:33:44,094 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-27 19:33:44,095 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:33:44,629 INFO L124 PetriNetUnfolderBase]: 2604/3909 cut-off events. [2024-06-27 19:33:44,630 INFO L125 PetriNetUnfolderBase]: For 39012/39021 co-relation queries the response was YES. [2024-06-27 19:33:44,637 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16588 conditions, 3909 events. 2604/3909 cut-off events. For 39012/39021 co-relation queries the response was YES. Maximal size of possible extension queue 152. Compared 18990 event pairs, 1000 based on Foata normal form. 9/3905 useless extension candidates. Maximal degree in co-relation 16557. Up to 3739 conditions per place. [2024-06-27 19:33:44,646 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 74 selfloop transitions, 18 changer transitions 0/102 dead transitions. [2024-06-27 19:33:44,646 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 83 places, 102 transitions, 791 flow [2024-06-27 19:33:44,646 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 19:33:44,646 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 19:33:44,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 106 transitions. [2024-06-27 19:33:44,647 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4108527131782946 [2024-06-27 19:33:44,647 INFO L175 Difference]: Start difference. First operand has 78 places, 79 transitions, 491 flow. Second operand 6 states and 106 transitions. [2024-06-27 19:33:44,647 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 83 places, 102 transitions, 791 flow [2024-06-27 19:33:44,667 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 78 places, 102 transitions, 746 flow, removed 11 selfloop flow, removed 5 redundant places. [2024-06-27 19:33:44,668 INFO L231 Difference]: Finished difference. Result has 80 places, 86 transitions, 560 flow [2024-06-27 19:33:44,669 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=446, PETRI_DIFFERENCE_MINUEND_PLACES=73, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=79, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=63, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=560, PETRI_PLACES=80, PETRI_TRANSITIONS=86} [2024-06-27 19:33:44,669 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 36 predicate places. [2024-06-27 19:33:44,669 INFO L495 AbstractCegarLoop]: Abstraction has has 80 places, 86 transitions, 560 flow [2024-06-27 19:33:44,669 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 9.857142857142858) internal successors, (69), 7 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:33:44,669 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:33:44,669 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:33:44,670 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-06-27 19:33:44,670 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:33:44,670 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:33:44,670 INFO L85 PathProgramCache]: Analyzing trace with hash -352541455, now seen corresponding path program 1 times [2024-06-27 19:33:44,670 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:33:44,670 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1488560196] [2024-06-27 19:33:44,670 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:33:44,671 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:33:44,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:33:45,163 INFO 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 19:33:45,164 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:33:45,164 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1488560196] [2024-06-27 19:33:45,164 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1488560196] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:33:45,164 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:33:45,164 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 19:33:45,164 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [751279669] [2024-06-27 19:33:45,164 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:33:45,165 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 19:33:45,165 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:33:45,165 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 19:33:45,165 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-27 19:33:45,224 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-27 19:33:45,224 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 80 places, 86 transitions, 560 flow. Second operand has 7 states, 7 states have (on average 9.857142857142858) internal successors, (69), 7 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:33:45,224 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:33:45,224 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-27 19:33:45,225 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:33:45,779 INFO L124 PetriNetUnfolderBase]: 2631/3949 cut-off events. [2024-06-27 19:33:45,779 INFO L125 PetriNetUnfolderBase]: For 44492/44501 co-relation queries the response was YES. [2024-06-27 19:33:45,788 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17768 conditions, 3949 events. 2631/3949 cut-off events. For 44492/44501 co-relation queries the response was YES. Maximal size of possible extension queue 152. Compared 19225 event pairs, 1009 based on Foata normal form. 7/3943 useless extension candidates. Maximal degree in co-relation 17735. Up to 3810 conditions per place. [2024-06-27 19:33:45,800 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 87 selfloop transitions, 21 changer transitions 0/118 dead transitions. [2024-06-27 19:33:45,800 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 86 places, 118 transitions, 906 flow [2024-06-27 19:33:45,801 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 19:33:45,801 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 19:33:45,801 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 122 transitions. [2024-06-27 19:33:45,802 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4053156146179402 [2024-06-27 19:33:45,802 INFO L175 Difference]: Start difference. First operand has 80 places, 86 transitions, 560 flow. Second operand 7 states and 122 transitions. [2024-06-27 19:33:45,802 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 86 places, 118 transitions, 906 flow [2024-06-27 19:33:45,832 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 84 places, 118 transitions, 866 flow, removed 13 selfloop flow, removed 2 redundant places. [2024-06-27 19:33:45,833 INFO L231 Difference]: Finished difference. Result has 87 places, 97 transitions, 669 flow [2024-06-27 19:33:45,833 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=526, PETRI_DIFFERENCE_MINUEND_PLACES=78, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=86, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=70, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=669, PETRI_PLACES=87, PETRI_TRANSITIONS=97} [2024-06-27 19:33:45,834 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 43 predicate places. [2024-06-27 19:33:45,834 INFO L495 AbstractCegarLoop]: Abstraction has has 87 places, 97 transitions, 669 flow [2024-06-27 19:33:45,834 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 9.857142857142858) internal successors, (69), 7 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:33:45,834 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:33:45,834 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:33:45,835 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-06-27 19:33:45,835 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:33:45,835 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:33:45,835 INFO L85 PathProgramCache]: Analyzing trace with hash 965911153, now seen corresponding path program 2 times [2024-06-27 19:33:45,835 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:33:45,835 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1628391191] [2024-06-27 19:33:45,836 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:33:45,836 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:33:45,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:33:46,330 INFO 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 19:33:46,331 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:33:46,331 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1628391191] [2024-06-27 19:33:46,331 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1628391191] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:33:46,331 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:33:46,331 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 19:33:46,331 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [272785053] [2024-06-27 19:33:46,331 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:33:46,332 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 19:33:46,332 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:33:46,332 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 19:33:46,332 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-27 19:33:46,407 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-27 19:33:46,407 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 87 places, 97 transitions, 669 flow. Second operand has 7 states, 7 states have (on average 9.857142857142858) internal successors, (69), 7 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:33:46,407 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:33:46,407 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-27 19:33:46,407 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:33:46,998 INFO L124 PetriNetUnfolderBase]: 2646/3972 cut-off events. [2024-06-27 19:33:46,998 INFO L125 PetriNetUnfolderBase]: For 50162/50171 co-relation queries the response was YES. [2024-06-27 19:33:47,006 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18755 conditions, 3972 events. 2646/3972 cut-off events. For 50162/50171 co-relation queries the response was YES. Maximal size of possible extension queue 152. Compared 19344 event pairs, 1008 based on Foata normal form. 7/3966 useless extension candidates. Maximal degree in co-relation 18718. Up to 3822 conditions per place. [2024-06-27 19:33:47,015 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 85 selfloop transitions, 22 changer transitions 0/117 dead transitions. [2024-06-27 19:33:47,016 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 92 places, 117 transitions, 971 flow [2024-06-27 19:33:47,016 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 19:33:47,016 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 19:33:47,017 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 106 transitions. [2024-06-27 19:33:47,017 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4108527131782946 [2024-06-27 19:33:47,017 INFO L175 Difference]: Start difference. First operand has 87 places, 97 transitions, 669 flow. Second operand 6 states and 106 transitions. [2024-06-27 19:33:47,017 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 92 places, 117 transitions, 971 flow [2024-06-27 19:33:47,048 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 90 places, 117 transitions, 941 flow, removed 7 selfloop flow, removed 2 redundant places. [2024-06-27 19:33:47,050 INFO L231 Difference]: Finished difference. Result has 91 places, 100 transitions, 735 flow [2024-06-27 19:33:47,050 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=639, PETRI_DIFFERENCE_MINUEND_PLACES=85, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=97, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=75, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=735, PETRI_PLACES=91, PETRI_TRANSITIONS=100} [2024-06-27 19:33:47,050 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 47 predicate places. [2024-06-27 19:33:47,050 INFO L495 AbstractCegarLoop]: Abstraction has has 91 places, 100 transitions, 735 flow [2024-06-27 19:33:47,051 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 9.857142857142858) internal successors, (69), 7 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:33:47,051 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:33:47,051 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:33:47,051 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-06-27 19:33:47,051 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:33:47,051 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:33:47,051 INFO L85 PathProgramCache]: Analyzing trace with hash -1225909641, now seen corresponding path program 3 times [2024-06-27 19:33:47,051 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:33:47,052 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [262234854] [2024-06-27 19:33:47,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:33:47,052 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:33:47,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:33:47,594 INFO 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 19:33:47,594 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:33:47,594 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [262234854] [2024-06-27 19:33:47,594 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [262234854] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:33:47,594 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:33:47,594 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 19:33:47,594 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [35289117] [2024-06-27 19:33:47,595 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:33:47,595 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 19:33:47,595 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:33:47,595 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 19:33:47,595 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-27 19:33:47,643 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-27 19:33:47,644 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 91 places, 100 transitions, 735 flow. Second operand has 7 states, 7 states have (on average 9.857142857142858) internal successors, (69), 7 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:33:47,644 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:33:47,644 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-27 19:33:47,644 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:33:48,171 INFO L124 PetriNetUnfolderBase]: 2642/3972 cut-off events. [2024-06-27 19:33:48,171 INFO L125 PetriNetUnfolderBase]: For 55586/55595 co-relation queries the response was YES. [2024-06-27 19:33:48,183 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19084 conditions, 3972 events. 2642/3972 cut-off events. For 55586/55595 co-relation queries the response was YES. Maximal size of possible extension queue 152. Compared 19321 event pairs, 1008 based on Foata normal form. 10/3967 useless extension candidates. Maximal degree in co-relation 19045. Up to 3742 conditions per place. [2024-06-27 19:33:48,195 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 80 selfloop transitions, 31 changer transitions 0/121 dead transitions. [2024-06-27 19:33:48,196 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 96 places, 121 transitions, 1105 flow [2024-06-27 19:33:48,196 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 19:33:48,196 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 19:33:48,196 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 107 transitions. [2024-06-27 19:33:48,197 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41472868217054265 [2024-06-27 19:33:48,197 INFO L175 Difference]: Start difference. First operand has 91 places, 100 transitions, 735 flow. Second operand 6 states and 107 transitions. [2024-06-27 19:33:48,197 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 96 places, 121 transitions, 1105 flow [2024-06-27 19:33:48,231 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 92 places, 121 transitions, 1039 flow, removed 15 selfloop flow, removed 4 redundant places. [2024-06-27 19:33:48,233 INFO L231 Difference]: Finished difference. Result has 93 places, 106 transitions, 819 flow [2024-06-27 19:33:48,233 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=677, PETRI_DIFFERENCE_MINUEND_PLACES=87, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=100, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=71, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=819, PETRI_PLACES=93, PETRI_TRANSITIONS=106} [2024-06-27 19:33:48,233 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 49 predicate places. [2024-06-27 19:33:48,233 INFO L495 AbstractCegarLoop]: Abstraction has has 93 places, 106 transitions, 819 flow [2024-06-27 19:33:48,234 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 9.857142857142858) internal successors, (69), 7 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:33:48,234 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:33:48,234 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:33:48,234 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2024-06-27 19:33:48,234 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:33:48,234 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:33:48,234 INFO L85 PathProgramCache]: Analyzing trace with hash 1893299217, now seen corresponding path program 1 times [2024-06-27 19:33:48,235 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:33:48,235 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [116435859] [2024-06-27 19:33:48,235 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:33:48,235 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:33:48,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:33:48,697 INFO 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 19:33:48,697 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:33:48,697 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [116435859] [2024-06-27 19:33:48,697 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [116435859] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:33:48,697 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:33:48,697 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 19:33:48,697 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [446858820] [2024-06-27 19:33:48,698 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:33:48,698 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 19:33:48,698 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:33:48,698 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 19:33:48,698 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-27 19:33:48,749 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 43 [2024-06-27 19:33:48,750 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 93 places, 106 transitions, 819 flow. Second operand has 7 states, 7 states have (on average 8.857142857142858) internal successors, (62), 7 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:33:48,750 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:33:48,750 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 43 [2024-06-27 19:33:48,750 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:33:49,280 INFO L124 PetriNetUnfolderBase]: 2849/4192 cut-off events. [2024-06-27 19:33:49,280 INFO L125 PetriNetUnfolderBase]: For 55813/55813 co-relation queries the response was YES. [2024-06-27 19:33:49,291 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20457 conditions, 4192 events. 2849/4192 cut-off events. For 55813/55813 co-relation queries the response was YES. Maximal size of possible extension queue 150. Compared 19620 event pairs, 1131 based on Foata normal form. 4/4194 useless extension candidates. Maximal degree in co-relation 20417. Up to 4157 conditions per place. [2024-06-27 19:33:49,304 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 113 selfloop transitions, 11 changer transitions 0/127 dead transitions. [2024-06-27 19:33:49,304 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 98 places, 127 transitions, 1154 flow [2024-06-27 19:33:49,305 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 19:33:49,305 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 19:33:49,305 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 97 transitions. [2024-06-27 19:33:49,305 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.375968992248062 [2024-06-27 19:33:49,305 INFO L175 Difference]: Start difference. First operand has 93 places, 106 transitions, 819 flow. Second operand 6 states and 97 transitions. [2024-06-27 19:33:49,305 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 98 places, 127 transitions, 1154 flow [2024-06-27 19:33:49,349 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 95 places, 127 transitions, 1082 flow, removed 18 selfloop flow, removed 3 redundant places. [2024-06-27 19:33:49,350 INFO L231 Difference]: Finished difference. Result has 97 places, 112 transitions, 830 flow [2024-06-27 19:33:49,351 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=747, PETRI_DIFFERENCE_MINUEND_PLACES=90, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=106, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=95, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=830, PETRI_PLACES=97, PETRI_TRANSITIONS=112} [2024-06-27 19:33:49,351 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 53 predicate places. [2024-06-27 19:33:49,351 INFO L495 AbstractCegarLoop]: Abstraction has has 97 places, 112 transitions, 830 flow [2024-06-27 19:33:49,351 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 8.857142857142858) internal successors, (62), 7 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:33:49,351 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:33:49,351 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:33:49,352 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2024-06-27 19:33:49,352 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:33:49,352 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:33:49,352 INFO L85 PathProgramCache]: Analyzing trace with hash 1893536367, now seen corresponding path program 2 times [2024-06-27 19:33:49,352 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:33:49,352 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [125032722] [2024-06-27 19:33:49,352 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:33:49,353 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:33:49,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:33:49,833 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 19:33:49,833 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:33:49,833 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [125032722] [2024-06-27 19:33:49,833 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [125032722] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:33:49,833 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:33:49,833 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 19:33:49,833 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1902458215] [2024-06-27 19:33:49,834 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:33:49,834 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 19:33:49,834 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:33:49,834 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 19:33:49,834 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-27 19:33:49,875 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 43 [2024-06-27 19:33:49,875 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 97 places, 112 transitions, 830 flow. Second operand has 7 states, 7 states have (on average 8.857142857142858) internal successors, (62), 7 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:33:49,875 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:33:49,875 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 43 [2024-06-27 19:33:49,875 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:33:50,406 INFO L124 PetriNetUnfolderBase]: 2861/4210 cut-off events. [2024-06-27 19:33:50,406 INFO L125 PetriNetUnfolderBase]: For 61132/61134 co-relation queries the response was YES. [2024-06-27 19:33:50,416 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21286 conditions, 4210 events. 2861/4210 cut-off events. For 61132/61134 co-relation queries the response was YES. Maximal size of possible extension queue 150. Compared 19753 event pairs, 1150 based on Foata normal form. 6/4214 useless extension candidates. Maximal degree in co-relation 21244. Up to 4159 conditions per place. [2024-06-27 19:33:50,428 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 111 selfloop transitions, 16 changer transitions 0/130 dead transitions. [2024-06-27 19:33:50,429 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 102 places, 130 transitions, 1168 flow [2024-06-27 19:33:50,429 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 19:33:50,429 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 19:33:50,430 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 99 transitions. [2024-06-27 19:33:50,430 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38372093023255816 [2024-06-27 19:33:50,430 INFO L175 Difference]: Start difference. First operand has 97 places, 112 transitions, 830 flow. Second operand 6 states and 99 transitions. [2024-06-27 19:33:50,430 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 102 places, 130 transitions, 1168 flow [2024-06-27 19:33:50,471 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 99 places, 130 transitions, 1136 flow, removed 9 selfloop flow, removed 3 redundant places. [2024-06-27 19:33:50,472 INFO L231 Difference]: Finished difference. Result has 100 places, 115 transitions, 872 flow [2024-06-27 19:33:50,472 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=798, PETRI_DIFFERENCE_MINUEND_PLACES=94, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=112, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=96, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=872, PETRI_PLACES=100, PETRI_TRANSITIONS=115} [2024-06-27 19:33:50,473 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 56 predicate places. [2024-06-27 19:33:50,473 INFO L495 AbstractCegarLoop]: Abstraction has has 100 places, 115 transitions, 872 flow [2024-06-27 19:33:50,473 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 8.857142857142858) internal successors, (62), 7 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:33:50,473 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:33:50,473 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:33:50,473 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2024-06-27 19:33:50,473 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:33:50,474 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:33:50,474 INFO L85 PathProgramCache]: Analyzing trace with hash 1893545295, now seen corresponding path program 1 times [2024-06-27 19:33:50,474 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:33:50,474 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2003184243] [2024-06-27 19:33:50,474 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:33:50,474 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:33:50,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:33:51,394 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:33:51,394 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:33:51,395 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2003184243] [2024-06-27 19:33:51,395 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2003184243] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:33:51,395 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:33:51,395 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:33:51,395 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [538116400] [2024-06-27 19:33:51,395 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:33:51,396 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:33:51,396 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:33:51,396 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:33:51,396 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:33:51,467 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-27 19:33:51,467 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 100 places, 115 transitions, 872 flow. Second operand has 8 states, 8 states have (on average 9.75) internal successors, (78), 8 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:33:51,467 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:33:51,467 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-27 19:33:51,467 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:33:52,067 INFO L124 PetriNetUnfolderBase]: 2671/4012 cut-off events. [2024-06-27 19:33:52,067 INFO L125 PetriNetUnfolderBase]: For 66262/66267 co-relation queries the response was YES. [2024-06-27 19:33:52,083 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21118 conditions, 4012 events. 2671/4012 cut-off events. For 66262/66267 co-relation queries the response was YES. Maximal size of possible extension queue 150. Compared 19463 event pairs, 1134 based on Foata normal form. 1/4003 useless extension candidates. Maximal degree in co-relation 21075. Up to 3923 conditions per place. [2024-06-27 19:33:52,099 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 106 selfloop transitions, 14 changer transitions 0/130 dead transitions. [2024-06-27 19:33:52,100 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 106 places, 130 transitions, 1184 flow [2024-06-27 19:33:52,100 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 19:33:52,100 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 19:33:52,103 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 108 transitions. [2024-06-27 19:33:52,103 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3588039867109635 [2024-06-27 19:33:52,103 INFO L175 Difference]: Start difference. First operand has 100 places, 115 transitions, 872 flow. Second operand 7 states and 108 transitions. [2024-06-27 19:33:52,103 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 106 places, 130 transitions, 1184 flow [2024-06-27 19:33:52,166 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 102 places, 130 transitions, 1132 flow, removed 12 selfloop flow, removed 4 redundant places. [2024-06-27 19:33:52,169 INFO L231 Difference]: Finished difference. Result has 104 places, 120 transitions, 912 flow [2024-06-27 19:33:52,169 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=820, PETRI_DIFFERENCE_MINUEND_PLACES=96, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=115, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=101, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=912, PETRI_PLACES=104, PETRI_TRANSITIONS=120} [2024-06-27 19:33:52,169 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 60 predicate places. [2024-06-27 19:33:52,169 INFO L495 AbstractCegarLoop]: Abstraction has has 104 places, 120 transitions, 912 flow [2024-06-27 19:33:52,170 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.75) internal successors, (78), 8 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:33:52,170 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:33:52,170 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:33:52,170 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2024-06-27 19:33:52,170 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:33:52,170 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:33:52,171 INFO L85 PathProgramCache]: Analyzing trace with hash -331167152, now seen corresponding path program 1 times [2024-06-27 19:33:52,171 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:33:52,171 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1076477892] [2024-06-27 19:33:52,171 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:33:52,171 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:33:52,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:33:53,258 INFO 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 19:33:53,258 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:33:53,258 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1076477892] [2024-06-27 19:33:53,262 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1076477892] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:33:53,262 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:33:53,262 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 19:33:53,262 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [882761772] [2024-06-27 19:33:53,262 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:33:53,262 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 19:33:53,262 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:33:53,263 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 19:33:53,263 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-27 19:33:53,355 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 43 [2024-06-27 19:33:53,356 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 104 places, 120 transitions, 912 flow. Second operand has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 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 19:33:53,356 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:33:53,356 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 43 [2024-06-27 19:33:53,356 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:33:54,194 INFO L124 PetriNetUnfolderBase]: 2942/4337 cut-off events. [2024-06-27 19:33:54,195 INFO L125 PetriNetUnfolderBase]: For 77223/77223 co-relation queries the response was YES. [2024-06-27 19:33:54,207 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23225 conditions, 4337 events. 2942/4337 cut-off events. For 77223/77223 co-relation queries the response was YES. Maximal size of possible extension queue 151. Compared 20618 event pairs, 799 based on Foata normal form. 8/4343 useless extension candidates. Maximal degree in co-relation 23180. Up to 4068 conditions per place. [2024-06-27 19:33:54,221 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 139 selfloop transitions, 24 changer transitions 0/166 dead transitions. [2024-06-27 19:33:54,221 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 112 places, 166 transitions, 1486 flow [2024-06-27 19:33:54,222 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 19:33:54,222 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 19:33:54,222 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 155 transitions. [2024-06-27 19:33:54,222 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4005167958656331 [2024-06-27 19:33:54,223 INFO L175 Difference]: Start difference. First operand has 104 places, 120 transitions, 912 flow. Second operand 9 states and 155 transitions. [2024-06-27 19:33:54,223 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 112 places, 166 transitions, 1486 flow [2024-06-27 19:33:54,261 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 108 places, 166 transitions, 1440 flow, removed 13 selfloop flow, removed 4 redundant places. [2024-06-27 19:33:54,263 INFO L231 Difference]: Finished difference. Result has 109 places, 124 transitions, 981 flow [2024-06-27 19:33:54,263 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=866, PETRI_DIFFERENCE_MINUEND_PLACES=100, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=120, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=98, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=981, PETRI_PLACES=109, PETRI_TRANSITIONS=124} [2024-06-27 19:33:54,264 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 65 predicate places. [2024-06-27 19:33:54,264 INFO L495 AbstractCegarLoop]: Abstraction has has 109 places, 124 transitions, 981 flow [2024-06-27 19:33:54,264 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 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 19:33:54,264 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:33:54,264 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:33:54,264 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2024-06-27 19:33:54,264 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:33:54,265 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:33:54,265 INFO L85 PathProgramCache]: Analyzing trace with hash -331106702, now seen corresponding path program 2 times [2024-06-27 19:33:54,265 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:33:54,265 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1086973006] [2024-06-27 19:33:54,265 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:33:54,265 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:33:54,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:33:55,293 INFO 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 19:33:55,294 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:33:55,294 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1086973006] [2024-06-27 19:33:55,294 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1086973006] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:33:55,294 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:33:55,294 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 19:33:55,294 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [11714744] [2024-06-27 19:33:55,294 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:33:55,295 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 19:33:55,295 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:33:55,295 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 19:33:55,295 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2024-06-27 19:33:55,365 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 43 [2024-06-27 19:33:55,365 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 109 places, 124 transitions, 981 flow. Second operand has 11 states, 11 states have (on average 8.272727272727273) internal successors, (91), 11 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 19:33:55,366 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:33:55,366 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 43 [2024-06-27 19:33:55,366 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:33:56,349 INFO L124 PetriNetUnfolderBase]: 2926/4313 cut-off events. [2024-06-27 19:33:56,349 INFO L125 PetriNetUnfolderBase]: For 83525/83525 co-relation queries the response was YES. [2024-06-27 19:33:56,362 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23650 conditions, 4313 events. 2926/4313 cut-off events. For 83525/83525 co-relation queries the response was YES. Maximal size of possible extension queue 150. Compared 20404 event pairs, 963 based on Foata normal form. 8/4319 useless extension candidates. Maximal degree in co-relation 23604. Up to 4136 conditions per place. [2024-06-27 19:33:56,376 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 135 selfloop transitions, 20 changer transitions 0/158 dead transitions. [2024-06-27 19:33:56,376 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 116 places, 158 transitions, 1395 flow [2024-06-27 19:33:56,377 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:33:56,377 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:33:56,377 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 137 transitions. [2024-06-27 19:33:56,377 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39825581395348836 [2024-06-27 19:33:56,377 INFO L175 Difference]: Start difference. First operand has 109 places, 124 transitions, 981 flow. Second operand 8 states and 137 transitions. [2024-06-27 19:33:56,377 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 116 places, 158 transitions, 1395 flow [2024-06-27 19:33:56,433 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 111 places, 158 transitions, 1327 flow, removed 23 selfloop flow, removed 5 redundant places. [2024-06-27 19:33:56,438 INFO L231 Difference]: Finished difference. Result has 112 places, 124 transitions, 960 flow [2024-06-27 19:33:56,438 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=913, PETRI_DIFFERENCE_MINUEND_PLACES=104, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=124, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=104, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=960, PETRI_PLACES=112, PETRI_TRANSITIONS=124} [2024-06-27 19:33:56,439 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 68 predicate places. [2024-06-27 19:33:56,439 INFO L495 AbstractCegarLoop]: Abstraction has has 112 places, 124 transitions, 960 flow [2024-06-27 19:33:56,439 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 8.272727272727273) internal successors, (91), 11 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 19:33:56,439 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:33:56,439 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:33:56,439 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2024-06-27 19:33:56,440 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:33:56,440 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:33:56,440 INFO L85 PathProgramCache]: Analyzing trace with hash -973568772, now seen corresponding path program 1 times [2024-06-27 19:33:56,441 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:33:56,441 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1669521900] [2024-06-27 19:33:56,441 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:33:56,441 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:33:56,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:33:57,483 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:33:57,483 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:33:57,483 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1669521900] [2024-06-27 19:33:57,483 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1669521900] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:33:57,483 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:33:57,484 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 19:33:57,484 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [878652403] [2024-06-27 19:33:57,484 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:33:57,484 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 19:33:57,484 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:33:57,485 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 19:33:57,485 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-27 19:33:57,540 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 43 [2024-06-27 19:33:57,540 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 112 places, 124 transitions, 960 flow. Second operand has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 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 19:33:57,540 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:33:57,540 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 43 [2024-06-27 19:33:57,540 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:33:58,270 INFO L124 PetriNetUnfolderBase]: 2970/4377 cut-off events. [2024-06-27 19:33:58,270 INFO L125 PetriNetUnfolderBase]: For 90748/90748 co-relation queries the response was YES. [2024-06-27 19:33:58,283 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24203 conditions, 4377 events. 2970/4377 cut-off events. For 90748/90748 co-relation queries the response was YES. Maximal size of possible extension queue 150. Compared 20836 event pairs, 978 based on Foata normal form. 8/4383 useless extension candidates. Maximal degree in co-relation 24155. Up to 4200 conditions per place. [2024-06-27 19:33:58,296 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 137 selfloop transitions, 21 changer transitions 0/161 dead transitions. [2024-06-27 19:33:58,296 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 119 places, 161 transitions, 1422 flow [2024-06-27 19:33:58,297 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:33:58,297 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:33:58,297 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 138 transitions. [2024-06-27 19:33:58,298 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4011627906976744 [2024-06-27 19:33:58,298 INFO L175 Difference]: Start difference. First operand has 112 places, 124 transitions, 960 flow. Second operand 8 states and 138 transitions. [2024-06-27 19:33:58,298 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 119 places, 161 transitions, 1422 flow [2024-06-27 19:33:58,348 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 112 places, 161 transitions, 1377 flow, removed 1 selfloop flow, removed 7 redundant places. [2024-06-27 19:33:58,350 INFO L231 Difference]: Finished difference. Result has 113 places, 127 transitions, 1015 flow [2024-06-27 19:33:58,350 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=915, PETRI_DIFFERENCE_MINUEND_PLACES=105, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=124, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=103, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1015, PETRI_PLACES=113, PETRI_TRANSITIONS=127} [2024-06-27 19:33:58,350 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 69 predicate places. [2024-06-27 19:33:58,350 INFO L495 AbstractCegarLoop]: Abstraction has has 113 places, 127 transitions, 1015 flow [2024-06-27 19:33:58,351 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 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 19:33:58,351 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:33:58,351 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:33:58,351 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2024-06-27 19:33:58,351 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:33:58,351 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:33:58,351 INFO L85 PathProgramCache]: Analyzing trace with hash -968332496, now seen corresponding path program 2 times [2024-06-27 19:33:58,351 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:33:58,352 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1455877571] [2024-06-27 19:33:58,352 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:33:58,352 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:33:58,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:33:59,385 INFO 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 19:33:59,385 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:33:59,385 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1455877571] [2024-06-27 19:33:59,385 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1455877571] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:33:59,385 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:33:59,386 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 19:33:59,386 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [653170303] [2024-06-27 19:33:59,386 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:33:59,386 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 19:33:59,386 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:33:59,387 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 19:33:59,387 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2024-06-27 19:33:59,475 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 43 [2024-06-27 19:33:59,475 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 113 places, 127 transitions, 1015 flow. Second operand has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 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 19:33:59,476 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:33:59,476 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 43 [2024-06-27 19:33:59,476 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:34:00,379 INFO L124 PetriNetUnfolderBase]: 3078/4534 cut-off events. [2024-06-27 19:34:00,379 INFO L125 PetriNetUnfolderBase]: For 101192/101194 co-relation queries the response was YES. [2024-06-27 19:34:00,393 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25910 conditions, 4534 events. 3078/4534 cut-off events. For 101192/101194 co-relation queries the response was YES. Maximal size of possible extension queue 153. Compared 21661 event pairs, 749 based on Foata normal form. 8/4540 useless extension candidates. Maximal degree in co-relation 25861. Up to 3803 conditions per place. [2024-06-27 19:34:00,409 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 128 selfloop transitions, 49 changer transitions 0/180 dead transitions. [2024-06-27 19:34:00,410 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 120 places, 180 transitions, 1805 flow [2024-06-27 19:34:00,410 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:34:00,410 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:34:00,411 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 156 transitions. [2024-06-27 19:34:00,411 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45348837209302323 [2024-06-27 19:34:00,411 INFO L175 Difference]: Start difference. First operand has 113 places, 127 transitions, 1015 flow. Second operand 8 states and 156 transitions. [2024-06-27 19:34:00,411 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 120 places, 180 transitions, 1805 flow [2024-06-27 19:34:00,507 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 114 places, 180 transitions, 1729 flow, removed 19 selfloop flow, removed 6 redundant places. [2024-06-27 19:34:00,509 INFO L231 Difference]: Finished difference. Result has 115 places, 136 transitions, 1201 flow [2024-06-27 19:34:00,509 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=939, PETRI_DIFFERENCE_MINUEND_PLACES=107, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=127, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=84, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1201, PETRI_PLACES=115, PETRI_TRANSITIONS=136} [2024-06-27 19:34:00,509 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 71 predicate places. [2024-06-27 19:34:00,510 INFO L495 AbstractCegarLoop]: Abstraction has has 115 places, 136 transitions, 1201 flow [2024-06-27 19:34:00,510 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 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 19:34:00,510 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:34:00,510 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:34:00,510 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2024-06-27 19:34:00,510 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:34:00,510 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:34:00,511 INFO L85 PathProgramCache]: Analyzing trace with hash -968325986, now seen corresponding path program 3 times [2024-06-27 19:34:00,511 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:34:00,511 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1100292403] [2024-06-27 19:34:00,511 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:34:00,511 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:34:00,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:34:01,605 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:34:01,606 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:34:01,606 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1100292403] [2024-06-27 19:34:01,606 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1100292403] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:34:01,606 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:34:01,606 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 19:34:01,606 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1866700426] [2024-06-27 19:34:01,606 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:34:01,607 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 19:34:01,607 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:34:01,608 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 19:34:01,608 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-27 19:34:01,682 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 43 [2024-06-27 19:34:01,683 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 115 places, 136 transitions, 1201 flow. Second operand has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 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 19:34:01,683 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:34:01,683 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 43 [2024-06-27 19:34:01,683 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:34:02,607 INFO L124 PetriNetUnfolderBase]: 3058/4506 cut-off events. [2024-06-27 19:34:02,607 INFO L125 PetriNetUnfolderBase]: For 109889/109891 co-relation queries the response was YES. [2024-06-27 19:34:02,620 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26388 conditions, 4506 events. 3058/4506 cut-off events. For 109889/109891 co-relation queries the response was YES. Maximal size of possible extension queue 150. Compared 21491 event pairs, 755 based on Foata normal form. 8/4512 useless extension candidates. Maximal degree in co-relation 26338. Up to 3791 conditions per place. [2024-06-27 19:34:02,660 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 124 selfloop transitions, 50 changer transitions 0/177 dead transitions. [2024-06-27 19:34:02,660 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 122 places, 177 transitions, 1757 flow [2024-06-27 19:34:02,661 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:34:02,661 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:34:02,661 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 152 transitions. [2024-06-27 19:34:02,661 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4418604651162791 [2024-06-27 19:34:02,661 INFO L175 Difference]: Start difference. First operand has 115 places, 136 transitions, 1201 flow. Second operand 8 states and 152 transitions. [2024-06-27 19:34:02,661 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 122 places, 177 transitions, 1757 flow [2024-06-27 19:34:02,742 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 119 places, 177 transitions, 1647 flow, removed 42 selfloop flow, removed 3 redundant places. [2024-06-27 19:34:02,745 INFO L231 Difference]: Finished difference. Result has 120 places, 136 transitions, 1199 flow [2024-06-27 19:34:02,745 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1091, PETRI_DIFFERENCE_MINUEND_PLACES=112, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=136, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=50, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=86, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1199, PETRI_PLACES=120, PETRI_TRANSITIONS=136} [2024-06-27 19:34:02,746 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 76 predicate places. [2024-06-27 19:34:02,746 INFO L495 AbstractCegarLoop]: Abstraction has has 120 places, 136 transitions, 1199 flow [2024-06-27 19:34:02,746 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 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 19:34:02,746 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:34:02,746 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:34:02,746 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2024-06-27 19:34:02,747 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:34:02,747 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:34:02,747 INFO L85 PathProgramCache]: Analyzing trace with hash -968510436, now seen corresponding path program 3 times [2024-06-27 19:34:02,747 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:34:02,747 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [787798239] [2024-06-27 19:34:02,747 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:34:02,747 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:34:02,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:34:03,589 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:34:03,590 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:34:03,590 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [787798239] [2024-06-27 19:34:03,592 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [787798239] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:34:03,592 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:34:03,592 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 19:34:03,592 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [452939236] [2024-06-27 19:34:03,592 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:34:03,592 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 19:34:03,593 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:34:03,593 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 19:34:03,593 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2024-06-27 19:34:03,652 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 43 [2024-06-27 19:34:03,652 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 120 places, 136 transitions, 1199 flow. Second operand has 11 states, 11 states have (on average 8.272727272727273) internal successors, (91), 11 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 19:34:03,652 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:34:03,652 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 43 [2024-06-27 19:34:03,652 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:34:04,585 INFO L124 PetriNetUnfolderBase]: 3092/4560 cut-off events. [2024-06-27 19:34:04,585 INFO L125 PetriNetUnfolderBase]: For 116877/116879 co-relation queries the response was YES. [2024-06-27 19:34:04,601 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26988 conditions, 4560 events. 3092/4560 cut-off events. For 116877/116879 co-relation queries the response was YES. Maximal size of possible extension queue 155. Compared 21793 event pairs, 828 based on Foata normal form. 8/4566 useless extension candidates. Maximal degree in co-relation 26936. Up to 4175 conditions per place. [2024-06-27 19:34:04,615 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 137 selfloop transitions, 34 changer transitions 0/174 dead transitions. [2024-06-27 19:34:04,615 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 127 places, 174 transitions, 1693 flow [2024-06-27 19:34:04,616 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:34:04,616 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:34:04,616 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 143 transitions. [2024-06-27 19:34:04,617 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41569767441860467 [2024-06-27 19:34:04,617 INFO L175 Difference]: Start difference. First operand has 120 places, 136 transitions, 1199 flow. Second operand 8 states and 143 transitions. [2024-06-27 19:34:04,617 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 127 places, 174 transitions, 1693 flow [2024-06-27 19:34:04,683 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 120 places, 174 transitions, 1585 flow, removed 2 selfloop flow, removed 7 redundant places. [2024-06-27 19:34:04,686 INFO L231 Difference]: Finished difference. Result has 121 places, 138 transitions, 1206 flow [2024-06-27 19:34:04,686 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1091, PETRI_DIFFERENCE_MINUEND_PLACES=113, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=136, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=102, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1206, PETRI_PLACES=121, PETRI_TRANSITIONS=138} [2024-06-27 19:34:04,686 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 77 predicate places. [2024-06-27 19:34:04,686 INFO L495 AbstractCegarLoop]: Abstraction has has 121 places, 138 transitions, 1206 flow [2024-06-27 19:34:04,687 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 8.272727272727273) internal successors, (91), 11 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 19:34:04,687 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:34:04,687 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:34:04,687 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2024-06-27 19:34:04,687 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:34:04,687 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:34:04,687 INFO L85 PathProgramCache]: Analyzing trace with hash -121881909, now seen corresponding path program 1 times [2024-06-27 19:34:04,688 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:34:04,688 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1191951813] [2024-06-27 19:34:04,688 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:34:04,688 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:34:04,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:34:05,289 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:34:05,289 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:34:05,289 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1191951813] [2024-06-27 19:34:05,289 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1191951813] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:34:05,289 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:34:05,289 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:34:05,289 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [405577781] [2024-06-27 19:34:05,289 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:34:05,289 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:34:05,290 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:34:05,290 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:34:05,290 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:34:05,361 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-27 19:34:05,361 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 121 places, 138 transitions, 1206 flow. Second operand has 8 states, 8 states have (on average 9.75) internal successors, (78), 8 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:34:05,361 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:34:05,361 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-27 19:34:05,361 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:34:06,017 INFO L124 PetriNetUnfolderBase]: 2890/4341 cut-off events. [2024-06-27 19:34:06,017 INFO L125 PetriNetUnfolderBase]: For 122811/122826 co-relation queries the response was YES. [2024-06-27 19:34:06,031 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26433 conditions, 4341 events. 2890/4341 cut-off events. For 122811/122826 co-relation queries the response was YES. Maximal size of possible extension queue 154. Compared 21341 event pairs, 942 based on Foata normal form. 3/4319 useless extension candidates. Maximal degree in co-relation 26380. Up to 4170 conditions per place. [2024-06-27 19:34:06,044 INFO L140 encePairwiseOnDemand]: 35/43 looper letters, 123 selfloop transitions, 23 changer transitions 0/156 dead transitions. [2024-06-27 19:34:06,044 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 126 places, 156 transitions, 1554 flow [2024-06-27 19:34:06,044 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 19:34:06,045 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 19:34:06,045 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 106 transitions. [2024-06-27 19:34:06,045 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4108527131782946 [2024-06-27 19:34:06,045 INFO L175 Difference]: Start difference. First operand has 121 places, 138 transitions, 1206 flow. Second operand 6 states and 106 transitions. [2024-06-27 19:34:06,045 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 126 places, 156 transitions, 1554 flow [2024-06-27 19:34:06,122 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 120 places, 156 transitions, 1447 flow, removed 21 selfloop flow, removed 6 redundant places. [2024-06-27 19:34:06,125 INFO L231 Difference]: Finished difference. Result has 121 places, 138 transitions, 1160 flow [2024-06-27 19:34:06,125 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1099, PETRI_DIFFERENCE_MINUEND_PLACES=115, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=138, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=115, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1160, PETRI_PLACES=121, PETRI_TRANSITIONS=138} [2024-06-27 19:34:06,131 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 77 predicate places. [2024-06-27 19:34:06,131 INFO L495 AbstractCegarLoop]: Abstraction has has 121 places, 138 transitions, 1160 flow [2024-06-27 19:34:06,132 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.75) internal successors, (78), 8 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:34:06,132 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:34:06,132 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:34:06,132 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2024-06-27 19:34:06,132 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:34:06,133 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:34:06,133 INFO L85 PathProgramCache]: Analyzing trace with hash -796191174, now seen corresponding path program 1 times [2024-06-27 19:34:06,133 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:34:06,133 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1525607882] [2024-06-27 19:34:06,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:34:06,134 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:34:06,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:34:07,362 INFO 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 19:34:07,362 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:34:07,362 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1525607882] [2024-06-27 19:34:07,363 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1525607882] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:34:07,363 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:34:07,363 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 19:34:07,363 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [992433705] [2024-06-27 19:34:07,363 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:34:07,363 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 19:34:07,364 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:34:07,364 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 19:34:07,364 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-27 19:34:07,422 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 43 [2024-06-27 19:34:07,423 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 121 places, 138 transitions, 1160 flow. Second operand has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 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 19:34:07,423 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:34:07,423 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 43 [2024-06-27 19:34:07,423 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:34:08,177 INFO L124 PetriNetUnfolderBase]: 3111/4593 cut-off events. [2024-06-27 19:34:08,177 INFO L125 PetriNetUnfolderBase]: For 131558/131560 co-relation queries the response was YES. [2024-06-27 19:34:08,194 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27538 conditions, 4593 events. 3111/4593 cut-off events. For 131558/131560 co-relation queries the response was YES. Maximal size of possible extension queue 155. Compared 21991 event pairs, 960 based on Foata normal form. 8/4599 useless extension candidates. Maximal degree in co-relation 27484. Up to 4220 conditions per place. [2024-06-27 19:34:08,210 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 139 selfloop transitions, 34 changer transitions 0/176 dead transitions. [2024-06-27 19:34:08,210 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 128 places, 176 transitions, 1660 flow [2024-06-27 19:34:08,211 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:34:08,211 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:34:08,211 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 143 transitions. [2024-06-27 19:34:08,211 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41569767441860467 [2024-06-27 19:34:08,211 INFO L175 Difference]: Start difference. First operand has 121 places, 138 transitions, 1160 flow. Second operand 8 states and 143 transitions. [2024-06-27 19:34:08,212 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 128 places, 176 transitions, 1660 flow [2024-06-27 19:34:08,299 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 123 places, 176 transitions, 1599 flow, removed 4 selfloop flow, removed 5 redundant places. [2024-06-27 19:34:08,301 INFO L231 Difference]: Finished difference. Result has 124 places, 140 transitions, 1212 flow [2024-06-27 19:34:08,301 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1099, PETRI_DIFFERENCE_MINUEND_PLACES=116, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=138, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=104, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1212, PETRI_PLACES=124, PETRI_TRANSITIONS=140} [2024-06-27 19:34:08,302 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 80 predicate places. [2024-06-27 19:34:08,302 INFO L495 AbstractCegarLoop]: Abstraction has has 124 places, 140 transitions, 1212 flow [2024-06-27 19:34:08,302 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 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 19:34:08,302 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:34:08,303 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:34:08,303 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2024-06-27 19:34:08,303 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:34:08,303 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:34:08,303 INFO L85 PathProgramCache]: Analyzing trace with hash 624768882, now seen corresponding path program 4 times [2024-06-27 19:34:08,303 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:34:08,303 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [831711376] [2024-06-27 19:34:08,303 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:34:08,304 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:34:08,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:34:09,312 INFO 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 19:34:09,313 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:34:09,313 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [831711376] [2024-06-27 19:34:09,313 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [831711376] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:34:09,313 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:34:09,313 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 19:34:09,313 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1462610928] [2024-06-27 19:34:09,313 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:34:09,314 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 19:34:09,314 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:34:09,314 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 19:34:09,314 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2024-06-27 19:34:09,408 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 43 [2024-06-27 19:34:09,409 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 124 places, 140 transitions, 1212 flow. Second operand has 11 states, 11 states have (on average 8.272727272727273) internal successors, (91), 11 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 19:34:09,409 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:34:09,409 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 43 [2024-06-27 19:34:09,409 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:34:10,221 INFO L124 PetriNetUnfolderBase]: 3095/4574 cut-off events. [2024-06-27 19:34:10,221 INFO L125 PetriNetUnfolderBase]: For 130336/130338 co-relation queries the response was YES. [2024-06-27 19:34:10,238 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27560 conditions, 4574 events. 3095/4574 cut-off events. For 130336/130338 co-relation queries the response was YES. Maximal size of possible extension queue 153. Compared 21781 event pairs, 844 based on Foata normal form. 10/4579 useless extension candidates. Maximal degree in co-relation 27505. Up to 4184 conditions per place. [2024-06-27 19:34:10,253 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 138 selfloop transitions, 34 changer transitions 0/175 dead transitions. [2024-06-27 19:34:10,254 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 131 places, 175 transitions, 1704 flow [2024-06-27 19:34:10,254 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:34:10,255 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:34:10,255 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 140 transitions. [2024-06-27 19:34:10,255 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4069767441860465 [2024-06-27 19:34:10,255 INFO L175 Difference]: Start difference. First operand has 124 places, 140 transitions, 1212 flow. Second operand 8 states and 140 transitions. [2024-06-27 19:34:10,255 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 131 places, 175 transitions, 1704 flow [2024-06-27 19:34:10,353 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 125 places, 175 transitions, 1609 flow, removed 15 selfloop flow, removed 6 redundant places. [2024-06-27 19:34:10,355 INFO L231 Difference]: Finished difference. Result has 126 places, 142 transitions, 1238 flow [2024-06-27 19:34:10,355 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1117, PETRI_DIFFERENCE_MINUEND_PLACES=118, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=140, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=106, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1238, PETRI_PLACES=126, PETRI_TRANSITIONS=142} [2024-06-27 19:34:10,356 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 82 predicate places. [2024-06-27 19:34:10,356 INFO L495 AbstractCegarLoop]: Abstraction has has 126 places, 142 transitions, 1238 flow [2024-06-27 19:34:10,356 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 8.272727272727273) internal successors, (91), 11 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 19:34:10,356 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:34:10,356 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:34:10,356 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2024-06-27 19:34:10,356 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:34:10,357 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:34:10,357 INFO L85 PathProgramCache]: Analyzing trace with hash 1683556544, now seen corresponding path program 4 times [2024-06-27 19:34:10,357 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:34:10,357 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1978726158] [2024-06-27 19:34:10,357 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:34:10,357 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:34:10,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:34:11,470 INFO 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 19:34:11,471 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:34:11,471 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1978726158] [2024-06-27 19:34:11,471 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1978726158] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:34:11,471 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:34:11,471 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 19:34:11,471 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [689116821] [2024-06-27 19:34:11,471 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:34:11,472 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 19:34:11,472 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:34:11,472 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 19:34:11,472 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2024-06-27 19:34:11,566 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 43 [2024-06-27 19:34:11,566 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 126 places, 142 transitions, 1238 flow. Second operand has 11 states, 11 states have (on average 8.272727272727273) internal successors, (91), 11 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 19:34:11,566 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:34:11,566 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 43 [2024-06-27 19:34:11,566 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:34:12,464 INFO L124 PetriNetUnfolderBase]: 3203/4730 cut-off events. [2024-06-27 19:34:12,464 INFO L125 PetriNetUnfolderBase]: For 145260/145262 co-relation queries the response was YES. [2024-06-27 19:34:12,480 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29046 conditions, 4730 events. 3203/4730 cut-off events. For 145260/145262 co-relation queries the response was YES. Maximal size of possible extension queue 163. Compared 22722 event pairs, 754 based on Foata normal form. 10/4735 useless extension candidates. Maximal degree in co-relation 28990. Up to 3922 conditions per place. [2024-06-27 19:34:12,494 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 131 selfloop transitions, 55 changer transitions 0/189 dead transitions. [2024-06-27 19:34:12,494 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 133 places, 189 transitions, 2040 flow [2024-06-27 19:34:12,496 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:34:12,497 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:34:12,497 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 153 transitions. [2024-06-27 19:34:12,497 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44476744186046513 [2024-06-27 19:34:12,497 INFO L175 Difference]: Start difference. First operand has 126 places, 142 transitions, 1238 flow. Second operand 8 states and 153 transitions. [2024-06-27 19:34:12,497 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 133 places, 189 transitions, 2040 flow [2024-06-27 19:34:12,585 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 127 places, 189 transitions, 1937 flow, removed 19 selfloop flow, removed 6 redundant places. [2024-06-27 19:34:12,587 INFO L231 Difference]: Finished difference. Result has 128 places, 148 transitions, 1365 flow [2024-06-27 19:34:12,588 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1135, PETRI_DIFFERENCE_MINUEND_PLACES=120, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=142, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=49, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=93, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1365, PETRI_PLACES=128, PETRI_TRANSITIONS=148} [2024-06-27 19:34:12,588 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 84 predicate places. [2024-06-27 19:34:12,588 INFO L495 AbstractCegarLoop]: Abstraction has has 128 places, 148 transitions, 1365 flow [2024-06-27 19:34:12,588 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 8.272727272727273) internal successors, (91), 11 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 19:34:12,588 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:34:12,589 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:34:12,589 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2024-06-27 19:34:12,589 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:34:12,589 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:34:12,589 INFO L85 PathProgramCache]: Analyzing trace with hash 1683550034, now seen corresponding path program 5 times [2024-06-27 19:34:12,589 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:34:12,589 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [730574706] [2024-06-27 19:34:12,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:34:12,590 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:34:12,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:34:13,719 INFO 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 19:34:13,719 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:34:13,719 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [730574706] [2024-06-27 19:34:13,720 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [730574706] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:34:13,720 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:34:13,720 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 19:34:13,720 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [344059378] [2024-06-27 19:34:13,720 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:34:13,721 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 19:34:13,724 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:34:13,724 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 19:34:13,725 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2024-06-27 19:34:13,843 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 43 [2024-06-27 19:34:13,844 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 128 places, 148 transitions, 1365 flow. Second operand has 11 states, 11 states have (on average 8.272727272727273) internal successors, (91), 11 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 19:34:13,844 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:34:13,844 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 43 [2024-06-27 19:34:13,844 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:34:14,801 INFO L124 PetriNetUnfolderBase]: 3183/4702 cut-off events. [2024-06-27 19:34:14,801 INFO L125 PetriNetUnfolderBase]: For 151562/151564 co-relation queries the response was YES. [2024-06-27 19:34:14,818 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29093 conditions, 4702 events. 3183/4702 cut-off events. For 151562/151564 co-relation queries the response was YES. Maximal size of possible extension queue 161. Compared 22535 event pairs, 750 based on Foata normal form. 10/4707 useless extension candidates. Maximal degree in co-relation 29036. Up to 3910 conditions per place. [2024-06-27 19:34:14,834 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 127 selfloop transitions, 56 changer transitions 0/186 dead transitions. [2024-06-27 19:34:14,834 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 135 places, 186 transitions, 1947 flow [2024-06-27 19:34:14,835 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:34:14,835 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:34:14,835 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 149 transitions. [2024-06-27 19:34:14,835 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4331395348837209 [2024-06-27 19:34:14,836 INFO L175 Difference]: Start difference. First operand has 128 places, 148 transitions, 1365 flow. Second operand 8 states and 149 transitions. [2024-06-27 19:34:14,836 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 135 places, 186 transitions, 1947 flow [2024-06-27 19:34:14,949 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 130 places, 186 transitions, 1745 flow, removed 44 selfloop flow, removed 5 redundant places. [2024-06-27 19:34:14,951 INFO L231 Difference]: Finished difference. Result has 131 places, 148 transitions, 1283 flow [2024-06-27 19:34:14,951 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1163, PETRI_DIFFERENCE_MINUEND_PLACES=123, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=148, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=56, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=92, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1283, PETRI_PLACES=131, PETRI_TRANSITIONS=148} [2024-06-27 19:34:14,952 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 87 predicate places. [2024-06-27 19:34:14,952 INFO L495 AbstractCegarLoop]: Abstraction has has 131 places, 148 transitions, 1283 flow [2024-06-27 19:34:14,952 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 8.272727272727273) internal successors, (91), 11 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 19:34:14,952 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:34:14,952 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:34:14,953 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2024-06-27 19:34:14,953 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:34:14,953 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:34:14,953 INFO L85 PathProgramCache]: Analyzing trace with hash 1683796112, now seen corresponding path program 2 times [2024-06-27 19:34:14,953 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:34:14,953 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1962403962] [2024-06-27 19:34:14,953 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:34:14,953 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:34:14,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:34:16,171 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:34:16,171 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:34:16,171 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1962403962] [2024-06-27 19:34:16,172 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1962403962] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:34:16,172 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:34:16,172 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 19:34:16,172 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [244086422] [2024-06-27 19:34:16,172 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:34:16,172 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 19:34:16,172 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:34:16,172 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 19:34:16,172 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2024-06-27 19:34:16,298 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 43 [2024-06-27 19:34:16,298 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 131 places, 148 transitions, 1283 flow. Second operand has 11 states, 11 states have (on average 8.272727272727273) internal successors, (91), 11 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 19:34:16,298 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:34:16,298 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 43 [2024-06-27 19:34:16,298 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:34:17,211 INFO L124 PetriNetUnfolderBase]: 3217/4754 cut-off events. [2024-06-27 19:34:17,211 INFO L125 PetriNetUnfolderBase]: For 158559/158561 co-relation queries the response was YES. [2024-06-27 19:34:17,231 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29360 conditions, 4754 events. 3217/4754 cut-off events. For 158559/158561 co-relation queries the response was YES. Maximal size of possible extension queue 165. Compared 22938 event pairs, 956 based on Foata normal form. 10/4759 useless extension candidates. Maximal degree in co-relation 29302. Up to 4378 conditions per place. [2024-06-27 19:34:17,248 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 146 selfloop transitions, 34 changer transitions 0/183 dead transitions. [2024-06-27 19:34:17,249 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 138 places, 183 transitions, 1793 flow [2024-06-27 19:34:17,249 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:34:17,249 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:34:17,250 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 140 transitions. [2024-06-27 19:34:17,250 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4069767441860465 [2024-06-27 19:34:17,250 INFO L175 Difference]: Start difference. First operand has 131 places, 148 transitions, 1283 flow. Second operand 8 states and 140 transitions. [2024-06-27 19:34:17,251 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 138 places, 183 transitions, 1793 flow [2024-06-27 19:34:17,371 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 132 places, 183 transitions, 1679 flow, removed 5 selfloop flow, removed 6 redundant places. [2024-06-27 19:34:17,374 INFO L231 Difference]: Finished difference. Result has 133 places, 150 transitions, 1288 flow [2024-06-27 19:34:17,374 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1169, PETRI_DIFFERENCE_MINUEND_PLACES=125, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=148, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=114, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1288, PETRI_PLACES=133, PETRI_TRANSITIONS=150} [2024-06-27 19:34:17,374 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 89 predicate places. [2024-06-27 19:34:17,374 INFO L495 AbstractCegarLoop]: Abstraction has has 133 places, 150 transitions, 1288 flow [2024-06-27 19:34:17,375 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 8.272727272727273) internal successors, (91), 11 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 19:34:17,375 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:34:17,375 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:34:17,375 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2024-06-27 19:34:17,375 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:34:17,375 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:34:17,375 INFO L85 PathProgramCache]: Analyzing trace with hash 1330468272, now seen corresponding path program 6 times [2024-06-27 19:34:17,375 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:34:17,376 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1144283631] [2024-06-27 19:34:17,376 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:34:17,376 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:34:17,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:34:18,486 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:34:18,487 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:34:18,487 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1144283631] [2024-06-27 19:34:18,487 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1144283631] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:34:18,487 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:34:18,487 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 19:34:18,487 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1074166451] [2024-06-27 19:34:18,487 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:34:18,488 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 19:34:18,488 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:34:18,488 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 19:34:18,488 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2024-06-27 19:34:18,569 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 43 [2024-06-27 19:34:18,569 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 133 places, 150 transitions, 1288 flow. Second operand has 11 states, 11 states have (on average 8.272727272727273) internal successors, (91), 11 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 19:34:18,570 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:34:18,570 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 43 [2024-06-27 19:34:18,570 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:34:19,393 INFO L124 PetriNetUnfolderBase]: 3197/4722 cut-off events. [2024-06-27 19:34:19,393 INFO L125 PetriNetUnfolderBase]: For 165554/165554 co-relation queries the response was YES. [2024-06-27 19:34:19,412 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29289 conditions, 4722 events. 3197/4722 cut-off events. For 165554/165554 co-relation queries the response was YES. Maximal size of possible extension queue 163. Compared 22774 event pairs, 1105 based on Foata normal form. 8/4728 useless extension candidates. Maximal degree in co-relation 29230. Up to 4580 conditions per place. [2024-06-27 19:34:19,427 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 156 selfloop transitions, 19 changer transitions 0/178 dead transitions. [2024-06-27 19:34:19,428 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 140 places, 178 transitions, 1722 flow [2024-06-27 19:34:19,428 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:34:19,428 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:34:19,429 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 132 transitions. [2024-06-27 19:34:19,429 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38372093023255816 [2024-06-27 19:34:19,429 INFO L175 Difference]: Start difference. First operand has 133 places, 150 transitions, 1288 flow. Second operand 8 states and 132 transitions. [2024-06-27 19:34:19,429 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 140 places, 178 transitions, 1722 flow [2024-06-27 19:34:19,556 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 134 places, 178 transitions, 1591 flow, removed 33 selfloop flow, removed 6 redundant places. [2024-06-27 19:34:19,558 INFO L231 Difference]: Finished difference. Result has 135 places, 150 transitions, 1203 flow [2024-06-27 19:34:19,558 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1157, PETRI_DIFFERENCE_MINUEND_PLACES=127, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=150, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=131, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1203, PETRI_PLACES=135, PETRI_TRANSITIONS=150} [2024-06-27 19:34:19,558 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 91 predicate places. [2024-06-27 19:34:19,559 INFO L495 AbstractCegarLoop]: Abstraction has has 135 places, 150 transitions, 1203 flow [2024-06-27 19:34:19,559 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 8.272727272727273) internal successors, (91), 11 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 19:34:19,559 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:34:19,559 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:34:19,559 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2024-06-27 19:34:19,559 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:34:19,559 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:34:19,559 INFO L85 PathProgramCache]: Analyzing trace with hash 1340596530, now seen corresponding path program 3 times [2024-06-27 19:34:19,560 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:34:19,560 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2115611731] [2024-06-27 19:34:19,560 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:34:19,560 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:34:19,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:34:20,648 INFO 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 19:34:20,648 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:34:20,648 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2115611731] [2024-06-27 19:34:20,648 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2115611731] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:34:20,648 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:34:20,648 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 19:34:20,648 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1395265114] [2024-06-27 19:34:20,649 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:34:20,649 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 19:34:20,649 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:34:20,650 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 19:34:20,650 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2024-06-27 19:34:20,713 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 43 [2024-06-27 19:34:20,714 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 135 places, 150 transitions, 1203 flow. Second operand has 11 states, 11 states have (on average 8.272727272727273) internal successors, (91), 11 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 19:34:20,714 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:34:20,714 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 43 [2024-06-27 19:34:20,714 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:34:21,609 INFO L124 PetriNetUnfolderBase]: 3231/4776 cut-off events. [2024-06-27 19:34:21,609 INFO L125 PetriNetUnfolderBase]: For 174460/174460 co-relation queries the response was YES. [2024-06-27 19:34:21,625 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29556 conditions, 4776 events. 3231/4776 cut-off events. For 174460/174460 co-relation queries the response was YES. Maximal size of possible extension queue 167. Compared 23083 event pairs, 1110 based on Foata normal form. 8/4782 useless extension candidates. Maximal degree in co-relation 29496. Up to 4634 conditions per place. [2024-06-27 19:34:21,637 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 159 selfloop transitions, 18 changer transitions 0/180 dead transitions. [2024-06-27 19:34:21,638 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 142 places, 180 transitions, 1689 flow [2024-06-27 19:34:21,638 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:34:21,638 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:34:21,639 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 131 transitions. [2024-06-27 19:34:21,639 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3808139534883721 [2024-06-27 19:34:21,639 INFO L175 Difference]: Start difference. First operand has 135 places, 150 transitions, 1203 flow. Second operand 8 states and 131 transitions. [2024-06-27 19:34:21,639 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 142 places, 180 transitions, 1689 flow [2024-06-27 19:34:21,738 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 134 places, 180 transitions, 1626 flow, removed 2 selfloop flow, removed 8 redundant places. [2024-06-27 19:34:21,740 INFO L231 Difference]: Finished difference. Result has 135 places, 152 transitions, 1231 flow [2024-06-27 19:34:21,740 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1140, PETRI_DIFFERENCE_MINUEND_PLACES=127, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=150, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=132, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1231, PETRI_PLACES=135, PETRI_TRANSITIONS=152} [2024-06-27 19:34:21,740 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 91 predicate places. [2024-06-27 19:34:21,741 INFO L495 AbstractCegarLoop]: Abstraction has has 135 places, 152 transitions, 1231 flow [2024-06-27 19:34:21,741 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 8.272727272727273) internal successors, (91), 11 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 19:34:21,741 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:34:21,741 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:34:21,741 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2024-06-27 19:34:21,741 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:34:21,741 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:34:21,742 INFO L85 PathProgramCache]: Analyzing trace with hash 1340952720, now seen corresponding path program 4 times [2024-06-27 19:34:21,742 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:34:21,742 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [294709434] [2024-06-27 19:34:21,742 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:34:21,742 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:34:21,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:34:22,955 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 19:34:22,955 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:34:22,955 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [294709434] [2024-06-27 19:34:22,955 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [294709434] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:34:22,955 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:34:22,955 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 19:34:22,955 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [247884946] [2024-06-27 19:34:22,956 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:34:22,956 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 19:34:22,956 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:34:22,956 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 19:34:22,956 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2024-06-27 19:34:23,024 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 43 [2024-06-27 19:34:23,024 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 135 places, 152 transitions, 1231 flow. Second operand has 11 states, 11 states have (on average 8.272727272727273) internal successors, (91), 11 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 19:34:23,024 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:34:23,024 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 43 [2024-06-27 19:34:23,024 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:34:23,993 INFO L124 PetriNetUnfolderBase]: 3215/4752 cut-off events. [2024-06-27 19:34:23,993 INFO L125 PetriNetUnfolderBase]: For 181684/181684 co-relation queries the response was YES. [2024-06-27 19:34:24,011 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29635 conditions, 4752 events. 3215/4752 cut-off events. For 181684/181684 co-relation queries the response was YES. Maximal size of possible extension queue 165. Compared 22920 event pairs, 1074 based on Foata normal form. 8/4758 useless extension candidates. Maximal degree in co-relation 29574. Up to 4546 conditions per place. [2024-06-27 19:34:24,024 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 163 selfloop transitions, 22 changer transitions 0/188 dead transitions. [2024-06-27 19:34:24,025 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 143 places, 188 transitions, 1757 flow [2024-06-27 19:34:24,025 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 19:34:24,025 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 19:34:24,026 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 147 transitions. [2024-06-27 19:34:24,027 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3798449612403101 [2024-06-27 19:34:24,027 INFO L175 Difference]: Start difference. First operand has 135 places, 152 transitions, 1231 flow. Second operand 9 states and 147 transitions. [2024-06-27 19:34:24,027 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 143 places, 188 transitions, 1757 flow [2024-06-27 19:34:24,127 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 137 places, 188 transitions, 1684 flow, removed 20 selfloop flow, removed 6 redundant places. [2024-06-27 19:34:24,136 INFO L231 Difference]: Finished difference. Result has 138 places, 154 transitions, 1261 flow [2024-06-27 19:34:24,136 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1158, PETRI_DIFFERENCE_MINUEND_PLACES=129, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=152, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=130, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1261, PETRI_PLACES=138, PETRI_TRANSITIONS=154} [2024-06-27 19:34:24,137 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 94 predicate places. [2024-06-27 19:34:24,137 INFO L495 AbstractCegarLoop]: Abstraction has has 138 places, 154 transitions, 1261 flow [2024-06-27 19:34:24,137 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 8.272727272727273) internal successors, (91), 11 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 19:34:24,137 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:34:24,137 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:34:24,137 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2024-06-27 19:34:24,137 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:34:24,138 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:34:24,138 INFO L85 PathProgramCache]: Analyzing trace with hash 85195332, now seen corresponding path program 1 times [2024-06-27 19:34:24,138 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:34:24,138 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1944089297] [2024-06-27 19:34:24,138 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:34:24,138 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:34:24,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:34:24,709 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:34:24,710 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:34:24,710 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1944089297] [2024-06-27 19:34:24,710 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1944089297] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:34:24,710 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:34:24,710 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:34:24,710 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1902932972] [2024-06-27 19:34:24,710 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:34:24,711 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:34:24,711 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:34:24,711 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:34:24,711 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:34:24,760 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 43 [2024-06-27 19:34:24,760 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 138 places, 154 transitions, 1261 flow. Second operand has 8 states, 8 states have (on average 8.75) internal successors, (70), 8 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:34:24,761 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:34:24,761 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 43 [2024-06-27 19:34:24,761 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:34:25,523 INFO L124 PetriNetUnfolderBase]: 3206/4740 cut-off events. [2024-06-27 19:34:25,523 INFO L125 PetriNetUnfolderBase]: For 188166/188166 co-relation queries the response was YES. [2024-06-27 19:34:25,540 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29828 conditions, 4740 events. 3206/4740 cut-off events. For 188166/188166 co-relation queries the response was YES. Maximal size of possible extension queue 163. Compared 22890 event pairs, 1109 based on Foata normal form. 3/4741 useless extension candidates. Maximal degree in co-relation 29766. Up to 4665 conditions per place. [2024-06-27 19:34:25,553 INFO L140 encePairwiseOnDemand]: 35/43 looper letters, 152 selfloop transitions, 18 changer transitions 0/173 dead transitions. [2024-06-27 19:34:25,554 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 143 places, 173 transitions, 1701 flow [2024-06-27 19:34:25,554 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 19:34:25,554 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 19:34:25,554 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 100 transitions. [2024-06-27 19:34:25,555 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3875968992248062 [2024-06-27 19:34:25,555 INFO L175 Difference]: Start difference. First operand has 138 places, 154 transitions, 1261 flow. Second operand 6 states and 100 transitions. [2024-06-27 19:34:25,555 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 143 places, 173 transitions, 1701 flow [2024-06-27 19:34:25,645 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 136 places, 173 transitions, 1616 flow, removed 22 selfloop flow, removed 7 redundant places. [2024-06-27 19:34:25,647 INFO L231 Difference]: Finished difference. Result has 137 places, 157 transitions, 1271 flow [2024-06-27 19:34:25,647 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1176, PETRI_DIFFERENCE_MINUEND_PLACES=131, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=154, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=136, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1271, PETRI_PLACES=137, PETRI_TRANSITIONS=157} [2024-06-27 19:34:25,647 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 93 predicate places. [2024-06-27 19:34:25,647 INFO L495 AbstractCegarLoop]: Abstraction has has 137 places, 157 transitions, 1271 flow [2024-06-27 19:34:25,648 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.75) internal successors, (70), 8 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:34:25,648 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:34:25,648 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:34:25,648 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2024-06-27 19:34:25,648 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:34:25,648 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:34:25,648 INFO L85 PathProgramCache]: Analyzing trace with hash 284647069, now seen corresponding path program 1 times [2024-06-27 19:34:25,649 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:34:25,649 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1252804890] [2024-06-27 19:34:25,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:34:25,649 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:34:25,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:34:26,275 INFO 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 19:34:26,275 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:34:26,275 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1252804890] [2024-06-27 19:34:26,275 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1252804890] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:34:26,276 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:34:26,276 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:34:26,276 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [934557876] [2024-06-27 19:34:26,276 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:34:26,276 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:34:26,276 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:34:26,276 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:34:26,276 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:34:26,339 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 43 [2024-06-27 19:34:26,339 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 137 places, 157 transitions, 1271 flow. Second operand has 8 states, 8 states have (on average 8.75) internal successors, (70), 8 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:34:26,339 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:34:26,339 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 43 [2024-06-27 19:34:26,339 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:34:27,082 INFO L124 PetriNetUnfolderBase]: 3276/4842 cut-off events. [2024-06-27 19:34:27,083 INFO L125 PetriNetUnfolderBase]: For 201432/201434 co-relation queries the response was YES. [2024-06-27 19:34:27,103 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30949 conditions, 4842 events. 3276/4842 cut-off events. For 201432/201434 co-relation queries the response was YES. Maximal size of possible extension queue 171. Compared 23433 event pairs, 1055 based on Foata normal form. 8/4845 useless extension candidates. Maximal degree in co-relation 30886. Up to 4579 conditions per place. [2024-06-27 19:34:27,118 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 156 selfloop transitions, 29 changer transitions 0/188 dead transitions. [2024-06-27 19:34:27,119 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 143 places, 188 transitions, 1923 flow [2024-06-27 19:34:27,119 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 19:34:27,119 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 19:34:27,120 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 117 transitions. [2024-06-27 19:34:27,120 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38870431893687707 [2024-06-27 19:34:27,120 INFO L175 Difference]: Start difference. First operand has 137 places, 157 transitions, 1271 flow. Second operand 7 states and 117 transitions. [2024-06-27 19:34:27,120 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 143 places, 188 transitions, 1923 flow [2024-06-27 19:34:27,250 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 139 places, 188 transitions, 1828 flow, removed 32 selfloop flow, removed 4 redundant places. [2024-06-27 19:34:27,252 INFO L231 Difference]: Finished difference. Result has 141 places, 166 transitions, 1398 flow [2024-06-27 19:34:27,252 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1206, PETRI_DIFFERENCE_MINUEND_PLACES=133, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=157, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=130, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1398, PETRI_PLACES=141, PETRI_TRANSITIONS=166} [2024-06-27 19:34:27,252 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 97 predicate places. [2024-06-27 19:34:27,252 INFO L495 AbstractCegarLoop]: Abstraction has has 141 places, 166 transitions, 1398 flow [2024-06-27 19:34:27,253 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.75) internal successors, (70), 8 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:34:27,253 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:34:27,253 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:34:27,253 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2024-06-27 19:34:27,253 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:34:27,253 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:34:27,253 INFO L85 PathProgramCache]: Analyzing trace with hash 90909469, now seen corresponding path program 2 times [2024-06-27 19:34:27,253 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:34:27,254 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [875808912] [2024-06-27 19:34:27,254 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:34:27,254 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:34:27,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:34:27,848 INFO 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 19:34:27,848 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:34:27,848 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [875808912] [2024-06-27 19:34:27,849 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [875808912] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:34:27,849 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:34:27,849 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:34:27,849 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1795217456] [2024-06-27 19:34:27,849 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:34:27,849 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:34:27,849 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:34:27,849 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:34:27,849 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:34:27,883 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 43 [2024-06-27 19:34:27,884 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 141 places, 166 transitions, 1398 flow. Second operand has 8 states, 8 states have (on average 8.75) internal successors, (70), 8 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:34:27,884 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:34:27,884 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 43 [2024-06-27 19:34:27,884 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:34:28,665 INFO L124 PetriNetUnfolderBase]: 3314/4899 cut-off events. [2024-06-27 19:34:28,665 INFO L125 PetriNetUnfolderBase]: For 203618/203622 co-relation queries the response was YES. [2024-06-27 19:34:28,687 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31603 conditions, 4899 events. 3314/4899 cut-off events. For 203618/203622 co-relation queries the response was YES. Maximal size of possible extension queue 175. Compared 23874 event pairs, 1081 based on Foata normal form. 8/4902 useless extension candidates. Maximal degree in co-relation 31538. Up to 4567 conditions per place. [2024-06-27 19:34:28,705 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 163 selfloop transitions, 40 changer transitions 0/206 dead transitions. [2024-06-27 19:34:28,706 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 147 places, 206 transitions, 2236 flow [2024-06-27 19:34:28,706 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 19:34:28,706 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 19:34:28,707 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 118 transitions. [2024-06-27 19:34:28,707 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3920265780730897 [2024-06-27 19:34:28,707 INFO L175 Difference]: Start difference. First operand has 141 places, 166 transitions, 1398 flow. Second operand 7 states and 118 transitions. [2024-06-27 19:34:28,707 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 147 places, 206 transitions, 2236 flow [2024-06-27 19:34:28,892 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 144 places, 206 transitions, 2155 flow, removed 28 selfloop flow, removed 3 redundant places. [2024-06-27 19:34:28,895 INFO L231 Difference]: Finished difference. Result has 147 places, 183 transitions, 1670 flow [2024-06-27 19:34:28,895 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1317, PETRI_DIFFERENCE_MINUEND_PLACES=138, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=166, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=129, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1670, PETRI_PLACES=147, PETRI_TRANSITIONS=183} [2024-06-27 19:34:28,895 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 103 predicate places. [2024-06-27 19:34:28,895 INFO L495 AbstractCegarLoop]: Abstraction has has 147 places, 183 transitions, 1670 flow [2024-06-27 19:34:28,896 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.75) internal successors, (70), 8 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:34:28,896 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:34:28,896 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:34:28,896 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2024-06-27 19:34:28,896 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:34:28,896 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:34:28,896 INFO L85 PathProgramCache]: Analyzing trace with hash 292265629, now seen corresponding path program 3 times [2024-06-27 19:34:28,897 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:34:28,897 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1920512868] [2024-06-27 19:34:28,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:34:28,897 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:34:28,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:34:29,463 INFO 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 19:34:29,463 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:34:29,464 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1920512868] [2024-06-27 19:34:29,464 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1920512868] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:34:29,464 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:34:29,464 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:34:29,464 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1894078246] [2024-06-27 19:34:29,464 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:34:29,464 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:34:29,464 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:34:29,465 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:34:29,465 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:34:29,529 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 43 [2024-06-27 19:34:29,530 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 147 places, 183 transitions, 1670 flow. Second operand has 8 states, 8 states have (on average 8.75) internal successors, (70), 8 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:34:29,530 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:34:29,530 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 43 [2024-06-27 19:34:29,530 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:34:30,336 INFO L124 PetriNetUnfolderBase]: 3339/4928 cut-off events. [2024-06-27 19:34:30,336 INFO L125 PetriNetUnfolderBase]: For 216071/216073 co-relation queries the response was YES. [2024-06-27 19:34:30,358 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32862 conditions, 4928 events. 3339/4928 cut-off events. For 216071/216073 co-relation queries the response was YES. Maximal size of possible extension queue 177. Compared 23969 event pairs, 1142 based on Foata normal form. 6/4932 useless extension candidates. Maximal degree in co-relation 32793. Up to 4833 conditions per place. [2024-06-27 19:34:30,375 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 180 selfloop transitions, 34 changer transitions 0/217 dead transitions. [2024-06-27 19:34:30,375 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 154 places, 217 transitions, 2414 flow [2024-06-27 19:34:30,376 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:34:30,376 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:34:30,376 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 129 transitions. [2024-06-27 19:34:30,377 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.375 [2024-06-27 19:34:30,377 INFO L175 Difference]: Start difference. First operand has 147 places, 183 transitions, 1670 flow. Second operand 8 states and 129 transitions. [2024-06-27 19:34:30,377 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 154 places, 217 transitions, 2414 flow [2024-06-27 19:34:30,545 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 152 places, 217 transitions, 2295 flow, removed 51 selfloop flow, removed 2 redundant places. [2024-06-27 19:34:30,547 INFO L231 Difference]: Finished difference. Result has 154 places, 195 transitions, 1824 flow [2024-06-27 19:34:30,547 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1579, PETRI_DIFFERENCE_MINUEND_PLACES=145, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=183, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=152, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1824, PETRI_PLACES=154, PETRI_TRANSITIONS=195} [2024-06-27 19:34:30,548 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 110 predicate places. [2024-06-27 19:34:30,548 INFO L495 AbstractCegarLoop]: Abstraction has has 154 places, 195 transitions, 1824 flow [2024-06-27 19:34:30,548 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.75) internal successors, (70), 8 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:34:30,548 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:34:30,548 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:34:30,548 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2024-06-27 19:34:30,548 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:34:30,549 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:34:30,549 INFO L85 PathProgramCache]: Analyzing trace with hash 292275549, now seen corresponding path program 1 times [2024-06-27 19:34:30,549 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:34:30,549 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [297912666] [2024-06-27 19:34:30,549 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:34:30,549 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:34:30,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:34:31,286 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:34:31,286 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:34:31,286 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [297912666] [2024-06-27 19:34:31,286 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [297912666] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:34:31,286 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:34:31,287 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 19:34:31,287 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1562012546] [2024-06-27 19:34:31,287 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:34:31,287 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 19:34:31,287 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:34:31,287 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 19:34:31,288 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-27 19:34:31,375 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-27 19:34:31,375 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 154 places, 195 transitions, 1824 flow. Second operand has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:34:31,376 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:34:31,376 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-27 19:34:31,376 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:34:32,193 INFO L124 PetriNetUnfolderBase]: 3172/4751 cut-off events. [2024-06-27 19:34:32,193 INFO L125 PetriNetUnfolderBase]: For 228441/228470 co-relation queries the response was YES. [2024-06-27 19:34:32,216 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32284 conditions, 4751 events. 3172/4751 cut-off events. For 228441/228470 co-relation queries the response was YES. Maximal size of possible extension queue 181. Compared 23688 event pairs, 967 based on Foata normal form. 11/4723 useless extension candidates. Maximal degree in co-relation 32212. Up to 4443 conditions per place. [2024-06-27 19:34:32,234 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 152 selfloop transitions, 51 changer transitions 0/222 dead transitions. [2024-06-27 19:34:32,234 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 161 places, 222 transitions, 2388 flow [2024-06-27 19:34:32,235 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:34:32,235 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:34:32,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 136 transitions. [2024-06-27 19:34:32,236 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3953488372093023 [2024-06-27 19:34:32,236 INFO L175 Difference]: Start difference. First operand has 154 places, 195 transitions, 1824 flow. Second operand 8 states and 136 transitions. [2024-06-27 19:34:32,236 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 161 places, 222 transitions, 2388 flow [2024-06-27 19:34:32,420 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 157 places, 222 transitions, 2312 flow, removed 27 selfloop flow, removed 4 redundant places. [2024-06-27 19:34:32,422 INFO L231 Difference]: Finished difference. Result has 159 places, 202 transitions, 1972 flow [2024-06-27 19:34:32,423 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1748, PETRI_DIFFERENCE_MINUEND_PLACES=150, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=195, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=146, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1972, PETRI_PLACES=159, PETRI_TRANSITIONS=202} [2024-06-27 19:34:32,423 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 115 predicate places. [2024-06-27 19:34:32,423 INFO L495 AbstractCegarLoop]: Abstraction has has 159 places, 202 transitions, 1972 flow [2024-06-27 19:34:32,423 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:34:32,423 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:34:32,424 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:34:32,424 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2024-06-27 19:34:32,424 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:34:32,424 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:34:32,424 INFO L85 PathProgramCache]: Analyzing trace with hash -395509776, now seen corresponding path program 1 times [2024-06-27 19:34:32,424 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:34:32,424 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1987310081] [2024-06-27 19:34:32,424 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:34:32,425 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:34:32,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:34:32,927 INFO 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 19:34:32,928 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:34:32,928 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1987310081] [2024-06-27 19:34:32,928 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1987310081] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:34:32,928 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:34:32,928 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:34:32,928 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1300629261] [2024-06-27 19:34:32,928 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:34:32,928 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:34:32,928 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:34:32,928 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:34:32,928 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:34:32,955 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 43 [2024-06-27 19:34:32,956 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 159 places, 202 transitions, 1972 flow. Second operand has 8 states, 8 states have (on average 8.75) internal successors, (70), 8 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:34:32,956 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:34:32,956 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 43 [2024-06-27 19:34:32,956 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:34:33,831 INFO L124 PetriNetUnfolderBase]: 3407/5028 cut-off events. [2024-06-27 19:34:33,832 INFO L125 PetriNetUnfolderBase]: For 248875/248879 co-relation queries the response was YES. [2024-06-27 19:34:33,856 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35413 conditions, 5028 events. 3407/5028 cut-off events. For 248875/248879 co-relation queries the response was YES. Maximal size of possible extension queue 182. Compared 24466 event pairs, 1087 based on Foata normal form. 6/5031 useless extension candidates. Maximal degree in co-relation 35338. Up to 4830 conditions per place. [2024-06-27 19:34:33,874 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 198 selfloop transitions, 33 changer transitions 0/234 dead transitions. [2024-06-27 19:34:33,874 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 165 places, 234 transitions, 2607 flow [2024-06-27 19:34:33,874 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 19:34:33,874 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 19:34:33,875 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 119 transitions. [2024-06-27 19:34:33,875 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3953488372093023 [2024-06-27 19:34:33,875 INFO L175 Difference]: Start difference. First operand has 159 places, 202 transitions, 1972 flow. Second operand 7 states and 119 transitions. [2024-06-27 19:34:33,875 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 165 places, 234 transitions, 2607 flow [2024-06-27 19:34:34,102 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 161 places, 234 transitions, 2475 flow, removed 38 selfloop flow, removed 4 redundant places. [2024-06-27 19:34:34,105 INFO L231 Difference]: Finished difference. Result has 164 places, 212 transitions, 2043 flow [2024-06-27 19:34:34,105 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1840, PETRI_DIFFERENCE_MINUEND_PLACES=155, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=202, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=174, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2043, PETRI_PLACES=164, PETRI_TRANSITIONS=212} [2024-06-27 19:34:34,105 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 120 predicate places. [2024-06-27 19:34:34,105 INFO L495 AbstractCegarLoop]: Abstraction has has 164 places, 212 transitions, 2043 flow [2024-06-27 19:34:34,106 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.75) internal successors, (70), 8 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:34:34,106 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:34:34,106 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:34:34,106 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2024-06-27 19:34:34,106 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:34:34,106 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:34:34,106 INFO L85 PathProgramCache]: Analyzing trace with hash 527734128, now seen corresponding path program 2 times [2024-06-27 19:34:34,107 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:34:34,107 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1428899551] [2024-06-27 19:34:34,107 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:34:34,107 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:34:34,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:34:34,573 INFO 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 19:34:34,573 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:34:34,573 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1428899551] [2024-06-27 19:34:34,573 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1428899551] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:34:34,573 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:34:34,573 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:34:34,573 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [862677638] [2024-06-27 19:34:34,573 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:34:34,573 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:34:34,573 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:34:34,574 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:34:34,574 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:34:34,615 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 43 [2024-06-27 19:34:34,616 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 164 places, 212 transitions, 2043 flow. Second operand has 8 states, 8 states have (on average 8.75) internal successors, (70), 8 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:34:34,616 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:34:34,616 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 43 [2024-06-27 19:34:34,616 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:34:35,559 INFO L124 PetriNetUnfolderBase]: 3459/5100 cut-off events. [2024-06-27 19:34:35,560 INFO L125 PetriNetUnfolderBase]: For 265932/265936 co-relation queries the response was YES. [2024-06-27 19:34:35,584 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37370 conditions, 5100 events. 3459/5100 cut-off events. For 265932/265936 co-relation queries the response was YES. Maximal size of possible extension queue 189. Compared 24905 event pairs, 1093 based on Foata normal form. 6/5103 useless extension candidates. Maximal degree in co-relation 37291. Up to 4846 conditions per place. [2024-06-27 19:34:35,602 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 196 selfloop transitions, 42 changer transitions 0/241 dead transitions. [2024-06-27 19:34:35,602 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 170 places, 241 transitions, 2801 flow [2024-06-27 19:34:35,603 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 19:34:35,603 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 19:34:35,603 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 120 transitions. [2024-06-27 19:34:35,603 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39867109634551495 [2024-06-27 19:34:35,603 INFO L175 Difference]: Start difference. First operand has 164 places, 212 transitions, 2043 flow. Second operand 7 states and 120 transitions. [2024-06-27 19:34:35,604 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 170 places, 241 transitions, 2801 flow [2024-06-27 19:34:35,814 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 168 places, 241 transitions, 2753 flow, removed 13 selfloop flow, removed 2 redundant places. [2024-06-27 19:34:35,817 INFO L231 Difference]: Finished difference. Result has 170 places, 219 transitions, 2217 flow [2024-06-27 19:34:35,817 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1995, PETRI_DIFFERENCE_MINUEND_PLACES=162, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=212, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=170, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2217, PETRI_PLACES=170, PETRI_TRANSITIONS=219} [2024-06-27 19:34:35,817 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 126 predicate places. [2024-06-27 19:34:35,817 INFO L495 AbstractCegarLoop]: Abstraction has has 170 places, 219 transitions, 2217 flow [2024-06-27 19:34:35,818 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.75) internal successors, (70), 8 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:34:35,818 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:34:35,818 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:34:35,818 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2024-06-27 19:34:35,818 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:34:35,818 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:34:35,818 INFO L85 PathProgramCache]: Analyzing trace with hash 2135706004, now seen corresponding path program 3 times [2024-06-27 19:34:35,819 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:34:35,819 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [851761946] [2024-06-27 19:34:35,819 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:34:35,819 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:34:35,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:34:36,241 INFO 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 19:34:36,242 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:34:36,242 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [851761946] [2024-06-27 19:34:36,242 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [851761946] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:34:36,242 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:34:36,242 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:34:36,242 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [79430739] [2024-06-27 19:34:36,242 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:34:36,242 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:34:36,243 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:34:36,243 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:34:36,243 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:34:36,279 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 43 [2024-06-27 19:34:36,280 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 170 places, 219 transitions, 2217 flow. Second operand has 8 states, 8 states have (on average 8.75) internal successors, (70), 8 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:34:36,280 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:34:36,280 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 43 [2024-06-27 19:34:36,280 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:34:37,207 INFO L124 PetriNetUnfolderBase]: 3447/5083 cut-off events. [2024-06-27 19:34:37,208 INFO L125 PetriNetUnfolderBase]: For 274928/274930 co-relation queries the response was YES. [2024-06-27 19:34:37,247 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37564 conditions, 5083 events. 3447/5083 cut-off events. For 274928/274930 co-relation queries the response was YES. Maximal size of possible extension queue 188. Compared 24840 event pairs, 1068 based on Foata normal form. 6/5084 useless extension candidates. Maximal degree in co-relation 37482. Up to 4884 conditions per place. [2024-06-27 19:34:37,343 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 206 selfloop transitions, 30 changer transitions 0/239 dead transitions. [2024-06-27 19:34:37,344 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 176 places, 239 transitions, 2773 flow [2024-06-27 19:34:37,344 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 19:34:37,344 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 19:34:37,345 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 116 transitions. [2024-06-27 19:34:37,345 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3853820598006645 [2024-06-27 19:34:37,345 INFO L175 Difference]: Start difference. First operand has 170 places, 219 transitions, 2217 flow. Second operand 7 states and 116 transitions. [2024-06-27 19:34:37,345 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 176 places, 239 transitions, 2773 flow [2024-06-27 19:34:37,603 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 172 places, 239 transitions, 2655 flow, removed 27 selfloop flow, removed 4 redundant places. [2024-06-27 19:34:37,606 INFO L231 Difference]: Finished difference. Result has 173 places, 219 transitions, 2169 flow [2024-06-27 19:34:37,606 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2103, PETRI_DIFFERENCE_MINUEND_PLACES=166, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=219, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=189, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2169, PETRI_PLACES=173, PETRI_TRANSITIONS=219} [2024-06-27 19:34:37,607 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 129 predicate places. [2024-06-27 19:34:37,607 INFO L495 AbstractCegarLoop]: Abstraction has has 173 places, 219 transitions, 2169 flow [2024-06-27 19:34:37,607 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.75) internal successors, (70), 8 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:34:37,607 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:34:37,607 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:34:37,607 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2024-06-27 19:34:37,608 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:34:37,608 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:34:37,608 INFO L85 PathProgramCache]: Analyzing trace with hash -1649277584, now seen corresponding path program 4 times [2024-06-27 19:34:37,608 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:34:37,608 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [824001343] [2024-06-27 19:34:37,609 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:34:37,609 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:34:37,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:34:38,127 INFO 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 19:34:38,127 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:34:38,127 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [824001343] [2024-06-27 19:34:38,127 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [824001343] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:34:38,127 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:34:38,128 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:34:38,128 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1934304286] [2024-06-27 19:34:38,128 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:34:38,128 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:34:38,128 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:34:38,129 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:34:38,129 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:34:38,168 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 43 [2024-06-27 19:34:38,168 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 173 places, 219 transitions, 2169 flow. Second operand has 8 states, 8 states have (on average 8.75) internal successors, (70), 8 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:34:38,168 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:34:38,168 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 43 [2024-06-27 19:34:38,169 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:34:39,111 INFO L124 PetriNetUnfolderBase]: 3477/5125 cut-off events. [2024-06-27 19:34:39,111 INFO L125 PetriNetUnfolderBase]: For 288822/288824 co-relation queries the response was YES. [2024-06-27 19:34:39,140 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37757 conditions, 5125 events. 3477/5125 cut-off events. For 288822/288824 co-relation queries the response was YES. Maximal size of possible extension queue 194. Compared 25040 event pairs, 1065 based on Foata normal form. 10/5130 useless extension candidates. Maximal degree in co-relation 37674. Up to 4785 conditions per place. [2024-06-27 19:34:39,160 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 200 selfloop transitions, 44 changer transitions 0/247 dead transitions. [2024-06-27 19:34:39,160 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 179 places, 247 transitions, 2949 flow [2024-06-27 19:34:39,162 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 19:34:39,162 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 19:34:39,162 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 118 transitions. [2024-06-27 19:34:39,162 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3920265780730897 [2024-06-27 19:34:39,162 INFO L175 Difference]: Start difference. First operand has 173 places, 219 transitions, 2169 flow. Second operand 7 states and 118 transitions. [2024-06-27 19:34:39,162 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 179 places, 247 transitions, 2949 flow [2024-06-27 19:34:39,451 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 174 places, 247 transitions, 2891 flow, removed 4 selfloop flow, removed 5 redundant places. [2024-06-27 19:34:39,454 INFO L231 Difference]: Finished difference. Result has 176 places, 227 transitions, 2365 flow [2024-06-27 19:34:39,455 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2111, PETRI_DIFFERENCE_MINUEND_PLACES=168, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=219, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=177, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2365, PETRI_PLACES=176, PETRI_TRANSITIONS=227} [2024-06-27 19:34:39,455 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 132 predicate places. [2024-06-27 19:34:39,455 INFO L495 AbstractCegarLoop]: Abstraction has has 176 places, 227 transitions, 2365 flow [2024-06-27 19:34:39,456 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.75) internal successors, (70), 8 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:34:39,456 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:34:39,456 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:34:39,456 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2024-06-27 19:34:39,456 INFO L420 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:34:39,456 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:34:39,456 INFO L85 PathProgramCache]: Analyzing trace with hash -1377639730, now seen corresponding path program 5 times [2024-06-27 19:34:39,457 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:34:39,457 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [845607205] [2024-06-27 19:34:39,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:34:39,457 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:34:39,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:34:39,935 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:34:39,935 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:34:39,935 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [845607205] [2024-06-27 19:34:39,935 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [845607205] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:34:39,936 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:34:39,936 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:34:39,936 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [860994032] [2024-06-27 19:34:39,936 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:34:39,936 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:34:39,936 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:34:39,937 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:34:39,937 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:34:39,987 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 43 [2024-06-27 19:34:39,987 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 176 places, 227 transitions, 2365 flow. Second operand has 8 states, 8 states have (on average 8.75) internal successors, (70), 8 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:34:39,987 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:34:39,988 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 43 [2024-06-27 19:34:39,988 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:34:40,883 INFO L124 PetriNetUnfolderBase]: 3517/5184 cut-off events. [2024-06-27 19:34:40,884 INFO L125 PetriNetUnfolderBase]: For 303911/303915 co-relation queries the response was YES. [2024-06-27 19:34:40,913 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38986 conditions, 5184 events. 3517/5184 cut-off events. For 303911/303915 co-relation queries the response was YES. Maximal size of possible extension queue 200. Compared 25373 event pairs, 1103 based on Foata normal form. 10/5189 useless extension candidates. Maximal degree in co-relation 38902. Up to 4616 conditions per place. [2024-06-27 19:34:40,934 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 189 selfloop transitions, 72 changer transitions 0/264 dead transitions. [2024-06-27 19:34:40,934 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 182 places, 264 transitions, 3375 flow [2024-06-27 19:34:40,935 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 19:34:40,935 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 19:34:40,935 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 120 transitions. [2024-06-27 19:34:40,935 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39867109634551495 [2024-06-27 19:34:40,935 INFO L175 Difference]: Start difference. First operand has 176 places, 227 transitions, 2365 flow. Second operand 7 states and 120 transitions. [2024-06-27 19:34:40,935 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 182 places, 264 transitions, 3375 flow [2024-06-27 19:34:41,223 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 178 places, 264 transitions, 3251 flow, removed 34 selfloop flow, removed 4 redundant places. [2024-06-27 19:34:41,226 INFO L231 Difference]: Finished difference. Result has 181 places, 244 transitions, 2704 flow [2024-06-27 19:34:41,226 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2241, PETRI_DIFFERENCE_MINUEND_PLACES=172, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=227, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=58, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=161, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2704, PETRI_PLACES=181, PETRI_TRANSITIONS=244} [2024-06-27 19:34:41,226 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 137 predicate places. [2024-06-27 19:34:41,226 INFO L495 AbstractCegarLoop]: Abstraction has has 181 places, 244 transitions, 2704 flow [2024-06-27 19:34:41,227 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.75) internal successors, (70), 8 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:34:41,227 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:34:41,227 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:34:41,227 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2024-06-27 19:34:41,227 INFO L420 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:34:41,227 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:34:41,227 INFO L85 PathProgramCache]: Analyzing trace with hash 455345520, now seen corresponding path program 6 times [2024-06-27 19:34:41,227 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:34:41,228 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [986787780] [2024-06-27 19:34:41,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:34:41,228 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:34:41,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:34:41,693 INFO 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 19:34:41,694 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:34:41,694 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [986787780] [2024-06-27 19:34:41,694 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [986787780] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:34:41,694 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:34:41,694 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:34:41,694 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [106563276] [2024-06-27 19:34:41,694 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:34:41,694 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:34:41,695 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:34:41,695 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:34:41,695 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:34:41,755 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 43 [2024-06-27 19:34:41,756 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 181 places, 244 transitions, 2704 flow. Second operand has 8 states, 8 states have (on average 8.75) internal successors, (70), 8 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:34:41,756 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:34:41,756 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 43 [2024-06-27 19:34:41,756 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:34:42,654 INFO L124 PetriNetUnfolderBase]: 3537/5212 cut-off events. [2024-06-27 19:34:42,655 INFO L125 PetriNetUnfolderBase]: For 318212/318216 co-relation queries the response was YES. [2024-06-27 19:34:42,679 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40098 conditions, 5212 events. 3537/5212 cut-off events. For 318212/318216 co-relation queries the response was YES. Maximal size of possible extension queue 205. Compared 25547 event pairs, 1105 based on Foata normal form. 10/5217 useless extension candidates. Maximal degree in co-relation 40011. Up to 4634 conditions per place. [2024-06-27 19:34:42,698 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 186 selfloop transitions, 82 changer transitions 0/271 dead transitions. [2024-06-27 19:34:42,698 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 187 places, 271 transitions, 3580 flow [2024-06-27 19:34:42,699 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 19:34:42,699 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 19:34:42,699 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 119 transitions. [2024-06-27 19:34:42,699 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3953488372093023 [2024-06-27 19:34:42,699 INFO L175 Difference]: Start difference. First operand has 181 places, 244 transitions, 2704 flow. Second operand 7 states and 119 transitions. [2024-06-27 19:34:42,699 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 187 places, 271 transitions, 3580 flow [2024-06-27 19:34:43,052 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 185 places, 271 transitions, 3440 flow, removed 60 selfloop flow, removed 2 redundant places. [2024-06-27 19:34:43,055 INFO L231 Difference]: Finished difference. Result has 186 places, 252 transitions, 2898 flow [2024-06-27 19:34:43,055 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2582, PETRI_DIFFERENCE_MINUEND_PLACES=179, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=244, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=74, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=169, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2898, PETRI_PLACES=186, PETRI_TRANSITIONS=252} [2024-06-27 19:34:43,056 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 142 predicate places. [2024-06-27 19:34:43,056 INFO L495 AbstractCegarLoop]: Abstraction has has 186 places, 252 transitions, 2898 flow [2024-06-27 19:34:43,056 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.75) internal successors, (70), 8 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:34:43,056 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:34:43,056 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:34:43,056 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2024-06-27 19:34:43,056 INFO L420 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:34:43,057 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:34:43,057 INFO L85 PathProgramCache]: Analyzing trace with hash -1369059922, now seen corresponding path program 1 times [2024-06-27 19:34:43,057 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:34:43,058 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1214321757] [2024-06-27 19:34:43,058 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:34:43,058 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:34:43,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:34:43,976 INFO 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 19:34:43,977 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:34:43,977 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1214321757] [2024-06-27 19:34:43,977 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1214321757] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:34:43,977 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:34:43,977 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 19:34:43,977 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [516412155] [2024-06-27 19:34:43,977 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:34:43,977 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 19:34:43,978 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:34:43,978 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 19:34:43,978 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-27 19:34:44,032 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-27 19:34:44,033 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 186 places, 252 transitions, 2898 flow. Second operand has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:34:44,033 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:34:44,033 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-27 19:34:44,033 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:34:44,999 INFO L124 PetriNetUnfolderBase]: 3404/5081 cut-off events. [2024-06-27 19:34:44,999 INFO L125 PetriNetUnfolderBase]: For 327571/327594 co-relation queries the response was YES. [2024-06-27 19:34:45,027 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39296 conditions, 5081 events. 3404/5081 cut-off events. For 327571/327594 co-relation queries the response was YES. Maximal size of possible extension queue 212. Compared 25554 event pairs, 1110 based on Foata normal form. 8/5063 useless extension candidates. Maximal degree in co-relation 39207. Up to 4842 conditions per place. [2024-06-27 19:34:45,045 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 221 selfloop transitions, 23 changer transitions 0/277 dead transitions. [2024-06-27 19:34:45,045 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 193 places, 277 transitions, 3624 flow [2024-06-27 19:34:45,046 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:34:45,046 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:34:45,046 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 128 transitions. [2024-06-27 19:34:45,047 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37209302325581395 [2024-06-27 19:34:45,047 INFO L175 Difference]: Start difference. First operand has 186 places, 252 transitions, 2898 flow. Second operand 8 states and 128 transitions. [2024-06-27 19:34:45,047 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 193 places, 277 transitions, 3624 flow [2024-06-27 19:34:45,411 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 190 places, 277 transitions, 3470 flow, removed 39 selfloop flow, removed 3 redundant places. [2024-06-27 19:34:45,415 INFO L231 Difference]: Finished difference. Result has 192 places, 261 transitions, 2916 flow [2024-06-27 19:34:45,415 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2744, PETRI_DIFFERENCE_MINUEND_PLACES=183, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=252, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=232, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2916, PETRI_PLACES=192, PETRI_TRANSITIONS=261} [2024-06-27 19:34:45,415 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 148 predicate places. [2024-06-27 19:34:45,415 INFO L495 AbstractCegarLoop]: Abstraction has has 192 places, 261 transitions, 2916 flow [2024-06-27 19:34:45,416 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:34:45,416 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:34:45,416 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:34:45,416 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2024-06-27 19:34:45,416 INFO L420 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:34:45,416 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:34:45,416 INFO L85 PathProgramCache]: Analyzing trace with hash 470086578, now seen corresponding path program 2 times [2024-06-27 19:34:45,416 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:34:45,417 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [834515685] [2024-06-27 19:34:45,417 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:34:45,417 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:34:45,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:34:46,310 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:34:46,310 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:34:46,310 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [834515685] [2024-06-27 19:34:46,310 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [834515685] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:34:46,310 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:34:46,310 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 19:34:46,310 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1263482294] [2024-06-27 19:34:46,311 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:34:46,311 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 19:34:46,311 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:34:46,311 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 19:34:46,311 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-27 19:34:46,376 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-27 19:34:46,376 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 192 places, 261 transitions, 2916 flow. Second operand has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:34:46,376 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:34:46,376 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-27 19:34:46,376 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:34:47,488 INFO L124 PetriNetUnfolderBase]: 3402/5079 cut-off events. [2024-06-27 19:34:47,488 INFO L125 PetriNetUnfolderBase]: For 332044/332061 co-relation queries the response was YES. [2024-06-27 19:34:47,513 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39599 conditions, 5079 events. 3402/5079 cut-off events. For 332044/332061 co-relation queries the response was YES. Maximal size of possible extension queue 212. Compared 25561 event pairs, 953 based on Foata normal form. 6/5056 useless extension candidates. Maximal degree in co-relation 39508. Up to 4624 conditions per place. [2024-06-27 19:34:47,530 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 187 selfloop transitions, 68 changer transitions 0/288 dead transitions. [2024-06-27 19:34:47,530 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 199 places, 288 transitions, 3686 flow [2024-06-27 19:34:47,531 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:34:47,531 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:34:47,531 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 138 transitions. [2024-06-27 19:34:47,531 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4011627906976744 [2024-06-27 19:34:47,531 INFO L175 Difference]: Start difference. First operand has 192 places, 261 transitions, 2916 flow. Second operand 8 states and 138 transitions. [2024-06-27 19:34:47,532 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 199 places, 288 transitions, 3686 flow [2024-06-27 19:34:47,955 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 195 places, 288 transitions, 3626 flow, removed 23 selfloop flow, removed 4 redundant places. [2024-06-27 19:34:47,959 INFO L231 Difference]: Finished difference. Result has 197 places, 267 transitions, 3133 flow [2024-06-27 19:34:47,959 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2856, PETRI_DIFFERENCE_MINUEND_PLACES=188, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=261, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=64, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=195, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3133, PETRI_PLACES=197, PETRI_TRANSITIONS=267} [2024-06-27 19:34:47,959 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 153 predicate places. [2024-06-27 19:34:47,959 INFO L495 AbstractCegarLoop]: Abstraction has has 197 places, 267 transitions, 3133 flow [2024-06-27 19:34:47,959 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:34:47,960 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:34:47,960 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:34:47,960 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2024-06-27 19:34:47,960 INFO L420 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:34:47,960 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:34:47,960 INFO L85 PathProgramCache]: Analyzing trace with hash -1184016954, now seen corresponding path program 1 times [2024-06-27 19:34:47,960 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:34:47,960 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [243167123] [2024-06-27 19:34:47,961 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:34:47,961 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:34:47,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:34:48,734 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:34:48,734 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:34:48,734 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [243167123] [2024-06-27 19:34:48,734 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [243167123] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:34:48,734 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:34:48,734 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 19:34:48,735 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [610474513] [2024-06-27 19:34:48,735 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:34:48,735 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 19:34:48,735 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:34:48,735 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 19:34:48,735 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-27 19:34:48,785 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 43 [2024-06-27 19:34:48,785 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 197 places, 267 transitions, 3133 flow. Second operand has 9 states, 9 states have (on average 8.666666666666666) internal successors, (78), 9 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:34:48,785 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:34:48,785 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 43 [2024-06-27 19:34:48,785 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:34:49,945 INFO L124 PetriNetUnfolderBase]: 3621/5323 cut-off events. [2024-06-27 19:34:49,946 INFO L125 PetriNetUnfolderBase]: For 347953/347953 co-relation queries the response was YES. [2024-06-27 19:34:49,976 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42351 conditions, 5323 events. 3621/5323 cut-off events. For 347953/347953 co-relation queries the response was YES. Maximal size of possible extension queue 212. Compared 26212 event pairs, 1128 based on Foata normal form. 4/5325 useless extension candidates. Maximal degree in co-relation 42257. Up to 5250 conditions per place. [2024-06-27 19:34:50,000 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 267 selfloop transitions, 23 changer transitions 0/293 dead transitions. [2024-06-27 19:34:50,001 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 204 places, 293 transitions, 3975 flow [2024-06-27 19:34:50,001 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:34:50,001 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:34:50,002 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 126 transitions. [2024-06-27 19:34:50,002 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36627906976744184 [2024-06-27 19:34:50,002 INFO L175 Difference]: Start difference. First operand has 197 places, 267 transitions, 3133 flow. Second operand 8 states and 126 transitions. [2024-06-27 19:34:50,002 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 204 places, 293 transitions, 3975 flow [2024-06-27 19:34:50,413 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 201 places, 293 transitions, 3874 flow, removed 30 selfloop flow, removed 3 redundant places. [2024-06-27 19:34:50,416 INFO L231 Difference]: Finished difference. Result has 202 places, 271 transitions, 3166 flow [2024-06-27 19:34:50,417 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3032, PETRI_DIFFERENCE_MINUEND_PLACES=194, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=267, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=244, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3166, PETRI_PLACES=202, PETRI_TRANSITIONS=271} [2024-06-27 19:34:50,417 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 158 predicate places. [2024-06-27 19:34:50,417 INFO L495 AbstractCegarLoop]: Abstraction has has 202 places, 271 transitions, 3166 flow [2024-06-27 19:34:50,417 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.666666666666666) internal successors, (78), 9 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:34:50,417 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:34:50,417 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:34:50,418 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2024-06-27 19:34:50,418 INFO L420 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:34:50,418 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:34:50,418 INFO L85 PathProgramCache]: Analyzing trace with hash 462027632, now seen corresponding path program 2 times [2024-06-27 19:34:50,418 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:34:50,418 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [988469143] [2024-06-27 19:34:50,418 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:34:50,419 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:34:50,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:34:51,286 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:34:51,286 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:34:51,286 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [988469143] [2024-06-27 19:34:51,286 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [988469143] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:34:51,286 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:34:51,286 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 19:34:51,287 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1096600182] [2024-06-27 19:34:51,287 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:34:51,287 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 19:34:51,287 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:34:51,287 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 19:34:51,287 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-27 19:34:51,331 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 43 [2024-06-27 19:34:51,331 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 202 places, 271 transitions, 3166 flow. Second operand has 9 states, 9 states have (on average 8.666666666666666) internal successors, (78), 9 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:34:51,331 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:34:51,332 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 43 [2024-06-27 19:34:51,332 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:34:52,400 INFO L124 PetriNetUnfolderBase]: 3641/5352 cut-off events. [2024-06-27 19:34:52,401 INFO L125 PetriNetUnfolderBase]: For 359420/359422 co-relation queries the response was YES. [2024-06-27 19:34:52,434 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42950 conditions, 5352 events. 3641/5352 cut-off events. For 359420/359422 co-relation queries the response was YES. Maximal size of possible extension queue 214. Compared 26385 event pairs, 1110 based on Foata normal form. 6/5356 useless extension candidates. Maximal degree in co-relation 42854. Up to 5269 conditions per place. [2024-06-27 19:34:52,455 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 263 selfloop transitions, 30 changer transitions 0/296 dead transitions. [2024-06-27 19:34:52,455 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 209 places, 296 transitions, 3943 flow [2024-06-27 19:34:52,456 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:34:52,456 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:34:52,456 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 127 transitions. [2024-06-27 19:34:52,456 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3691860465116279 [2024-06-27 19:34:52,457 INFO L175 Difference]: Start difference. First operand has 202 places, 271 transitions, 3166 flow. Second operand 8 states and 127 transitions. [2024-06-27 19:34:52,457 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 209 places, 296 transitions, 3943 flow [2024-06-27 19:34:53,010 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 202 places, 296 transitions, 3803 flow, removed 34 selfloop flow, removed 7 redundant places. [2024-06-27 19:34:53,014 INFO L231 Difference]: Finished difference. Result has 203 places, 275 transitions, 3182 flow [2024-06-27 19:34:53,015 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3026, PETRI_DIFFERENCE_MINUEND_PLACES=195, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=271, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=241, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3182, PETRI_PLACES=203, PETRI_TRANSITIONS=275} [2024-06-27 19:34:53,015 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 159 predicate places. [2024-06-27 19:34:53,015 INFO L495 AbstractCegarLoop]: Abstraction has has 203 places, 275 transitions, 3182 flow [2024-06-27 19:34:53,015 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.666666666666666) internal successors, (78), 9 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:34:53,015 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:34:53,015 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:34:53,015 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2024-06-27 19:34:53,016 INFO L420 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:34:53,016 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:34:53,016 INFO L85 PathProgramCache]: Analyzing trace with hash -1369052978, now seen corresponding path program 3 times [2024-06-27 19:34:53,016 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:34:53,016 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [457975211] [2024-06-27 19:34:53,016 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:34:53,016 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:34:53,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:34:53,708 INFO 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 19:34:53,708 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:34:53,708 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [457975211] [2024-06-27 19:34:53,708 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [457975211] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:34:53,708 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:34:53,709 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 19:34:53,709 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1934288942] [2024-06-27 19:34:53,709 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:34:53,709 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 19:34:53,710 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:34:53,711 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 19:34:53,711 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-27 19:34:53,743 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 43 [2024-06-27 19:34:53,743 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 203 places, 275 transitions, 3182 flow. Second operand has 9 states, 9 states have (on average 8.666666666666666) internal successors, (78), 9 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:34:53,743 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:34:53,743 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 43 [2024-06-27 19:34:53,743 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:34:54,873 INFO L124 PetriNetUnfolderBase]: 3703/5444 cut-off events. [2024-06-27 19:34:54,873 INFO L125 PetriNetUnfolderBase]: For 384046/384050 co-relation queries the response was YES. [2024-06-27 19:34:54,907 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44287 conditions, 5444 events. 3703/5444 cut-off events. For 384046/384050 co-relation queries the response was YES. Maximal size of possible extension queue 220. Compared 26881 event pairs, 1107 based on Foata normal form. 8/5447 useless extension candidates. Maximal degree in co-relation 44191. Up to 4811 conditions per place. [2024-06-27 19:34:54,931 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 214 selfloop transitions, 96 changer transitions 0/313 dead transitions. [2024-06-27 19:34:54,931 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 210 places, 313 transitions, 4456 flow [2024-06-27 19:34:54,931 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:34:54,931 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:34:54,932 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 135 transitions. [2024-06-27 19:34:54,932 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39244186046511625 [2024-06-27 19:34:54,932 INFO L175 Difference]: Start difference. First operand has 203 places, 275 transitions, 3182 flow. Second operand 8 states and 135 transitions. [2024-06-27 19:34:54,932 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 210 places, 313 transitions, 4456 flow [2024-06-27 19:34:55,546 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 205 places, 313 transitions, 4300 flow, removed 54 selfloop flow, removed 5 redundant places. [2024-06-27 19:34:55,550 INFO L231 Difference]: Finished difference. Result has 207 places, 289 transitions, 3513 flow [2024-06-27 19:34:55,550 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3064, PETRI_DIFFERENCE_MINUEND_PLACES=198, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=275, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=86, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=183, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3513, PETRI_PLACES=207, PETRI_TRANSITIONS=289} [2024-06-27 19:34:55,550 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 163 predicate places. [2024-06-27 19:34:55,550 INFO L495 AbstractCegarLoop]: Abstraction has has 207 places, 289 transitions, 3513 flow [2024-06-27 19:34:55,551 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.666666666666666) internal successors, (78), 9 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:34:55,551 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:34:55,551 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:34:55,551 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2024-06-27 19:34:55,551 INFO L420 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:34:55,551 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:34:55,551 INFO L85 PathProgramCache]: Analyzing trace with hash -1369349648, now seen corresponding path program 4 times [2024-06-27 19:34:55,551 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:34:55,551 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1190175413] [2024-06-27 19:34:55,552 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:34:55,552 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:34:55,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:34:56,467 INFO 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 19:34:56,467 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:34:56,467 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1190175413] [2024-06-27 19:34:56,467 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1190175413] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:34:56,467 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:34:56,467 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 19:34:56,467 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [20504147] [2024-06-27 19:34:56,468 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:34:56,468 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 19:34:56,468 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:34:56,468 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 19:34:56,468 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-27 19:34:56,541 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 43 [2024-06-27 19:34:56,541 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 207 places, 289 transitions, 3513 flow. Second operand has 9 states, 9 states have (on average 8.666666666666666) internal successors, (78), 9 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:34:56,541 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:34:56,541 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 43 [2024-06-27 19:34:56,541 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:34:57,648 INFO L124 PetriNetUnfolderBase]: 3765/5524 cut-off events. [2024-06-27 19:34:57,648 INFO L125 PetriNetUnfolderBase]: For 409156/409158 co-relation queries the response was YES. [2024-06-27 19:34:57,683 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46340 conditions, 5524 events. 3765/5524 cut-off events. For 409156/409158 co-relation queries the response was YES. Maximal size of possible extension queue 225. Compared 27152 event pairs, 1131 based on Foata normal form. 8/5530 useless extension candidates. Maximal degree in co-relation 46242. Up to 5317 conditions per place. [2024-06-27 19:34:57,705 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 265 selfloop transitions, 63 changer transitions 0/331 dead transitions. [2024-06-27 19:34:57,705 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 215 places, 331 transitions, 4859 flow [2024-06-27 19:34:57,706 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 19:34:57,706 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 19:34:57,706 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 149 transitions. [2024-06-27 19:34:57,706 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3850129198966408 [2024-06-27 19:34:57,706 INFO L175 Difference]: Start difference. First operand has 207 places, 289 transitions, 3513 flow. Second operand 9 states and 149 transitions. [2024-06-27 19:34:57,706 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 215 places, 331 transitions, 4859 flow [2024-06-27 19:34:58,223 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 212 places, 331 transitions, 4654 flow, removed 69 selfloop flow, removed 3 redundant places. [2024-06-27 19:34:58,227 INFO L231 Difference]: Finished difference. Result has 214 places, 303 transitions, 3821 flow [2024-06-27 19:34:58,227 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3354, PETRI_DIFFERENCE_MINUEND_PLACES=204, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=289, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=53, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=233, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3821, PETRI_PLACES=214, PETRI_TRANSITIONS=303} [2024-06-27 19:34:58,227 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 170 predicate places. [2024-06-27 19:34:58,228 INFO L495 AbstractCegarLoop]: Abstraction has has 214 places, 303 transitions, 3821 flow [2024-06-27 19:34:58,228 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.666666666666666) internal successors, (78), 9 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:34:58,228 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:34:58,228 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:34:58,228 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2024-06-27 19:34:58,228 INFO L420 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:34:58,229 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:34:58,229 INFO L85 PathProgramCache]: Analyzing trace with hash -1369042066, now seen corresponding path program 1 times [2024-06-27 19:34:58,229 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:34:58,229 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1299613519] [2024-06-27 19:34:58,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:34:58,229 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:34:58,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:34:59,375 INFO 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 19:34:59,376 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:34:59,376 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1299613519] [2024-06-27 19:34:59,376 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1299613519] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:34:59,376 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:34:59,376 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 19:34:59,376 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [844257777] [2024-06-27 19:34:59,376 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:34:59,376 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 19:34:59,377 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:34:59,377 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 19:34:59,377 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2024-06-27 19:34:59,507 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-27 19:34:59,508 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 214 places, 303 transitions, 3821 flow. Second operand has 10 states, 10 states have (on average 9.6) internal successors, (96), 10 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:34:59,508 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:34:59,508 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-27 19:34:59,508 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:35:00,616 INFO L124 PetriNetUnfolderBase]: 3629/5394 cut-off events. [2024-06-27 19:35:00,617 INFO L125 PetriNetUnfolderBase]: For 435573/435616 co-relation queries the response was YES. [2024-06-27 19:35:00,654 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45941 conditions, 5394 events. 3629/5394 cut-off events. For 435573/435616 co-relation queries the response was YES. Maximal size of possible extension queue 227. Compared 27054 event pairs, 992 based on Foata normal form. 24/5383 useless extension candidates. Maximal degree in co-relation 45840. Up to 4922 conditions per place. [2024-06-27 19:35:00,677 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 239 selfloop transitions, 56 changer transitions 0/330 dead transitions. [2024-06-27 19:35:00,677 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 221 places, 330 transitions, 4583 flow [2024-06-27 19:35:00,677 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:35:00,677 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:35:00,678 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 139 transitions. [2024-06-27 19:35:00,678 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40406976744186046 [2024-06-27 19:35:00,678 INFO L175 Difference]: Start difference. First operand has 214 places, 303 transitions, 3821 flow. Second operand 8 states and 139 transitions. [2024-06-27 19:35:00,678 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 221 places, 330 transitions, 4583 flow [2024-06-27 19:35:01,180 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 217 places, 330 transitions, 4449 flow, removed 55 selfloop flow, removed 4 redundant places. [2024-06-27 19:35:01,184 INFO L231 Difference]: Finished difference. Result has 218 places, 305 transitions, 3863 flow [2024-06-27 19:35:01,185 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3687, PETRI_DIFFERENCE_MINUEND_PLACES=210, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=303, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=54, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=247, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3863, PETRI_PLACES=218, PETRI_TRANSITIONS=305} [2024-06-27 19:35:01,185 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 174 predicate places. [2024-06-27 19:35:01,185 INFO L495 AbstractCegarLoop]: Abstraction has has 218 places, 305 transitions, 3863 flow [2024-06-27 19:35:01,185 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.6) internal successors, (96), 10 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:35:01,185 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:35:01,185 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:35:01,186 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2024-06-27 19:35:01,186 INFO L420 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:35:01,186 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:35:01,186 INFO L85 PathProgramCache]: Analyzing trace with hash -1187238867, now seen corresponding path program 1 times [2024-06-27 19:35:01,186 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:35:01,186 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [687211754] [2024-06-27 19:35:01,186 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:35:01,186 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:35:01,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:35:02,197 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:35:02,197 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:35:02,197 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [687211754] [2024-06-27 19:35:02,197 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [687211754] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:35:02,197 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:35:02,197 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 19:35:02,197 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1373859316] [2024-06-27 19:35:02,197 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:35:02,198 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 19:35:02,198 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:35:02,198 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 19:35:02,198 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2024-06-27 19:35:02,298 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 43 [2024-06-27 19:35:02,298 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 218 places, 305 transitions, 3863 flow. Second operand has 9 states, 9 states have (on average 8.777777777777779) internal successors, (79), 9 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:35:02,298 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:35:02,298 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 43 [2024-06-27 19:35:02,298 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:35:03,585 INFO L124 PetriNetUnfolderBase]: 4014/5932 cut-off events. [2024-06-27 19:35:03,586 INFO L125 PetriNetUnfolderBase]: For 475020/475022 co-relation queries the response was YES. [2024-06-27 19:35:03,625 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50906 conditions, 5932 events. 4014/5932 cut-off events. For 475020/475022 co-relation queries the response was YES. Maximal size of possible extension queue 241. Compared 30026 event pairs, 616 based on Foata normal form. 18/5945 useless extension candidates. Maximal degree in co-relation 50803. Up to 4834 conditions per place. [2024-06-27 19:35:03,650 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 295 selfloop transitions, 53 changer transitions 0/351 dead transitions. [2024-06-27 19:35:03,650 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 225 places, 351 transitions, 4991 flow [2024-06-27 19:35:03,651 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:35:03,651 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:35:03,653 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 152 transitions. [2024-06-27 19:35:03,655 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4418604651162791 [2024-06-27 19:35:03,655 INFO L175 Difference]: Start difference. First operand has 218 places, 305 transitions, 3863 flow. Second operand 8 states and 152 transitions. [2024-06-27 19:35:03,655 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 225 places, 351 transitions, 4991 flow [2024-06-27 19:35:04,261 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 219 places, 351 transitions, 4859 flow, removed 13 selfloop flow, removed 6 redundant places. [2024-06-27 19:35:04,265 INFO L231 Difference]: Finished difference. Result has 220 places, 307 transitions, 3921 flow [2024-06-27 19:35:04,266 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3731, PETRI_DIFFERENCE_MINUEND_PLACES=212, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=305, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=52, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=253, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3921, PETRI_PLACES=220, PETRI_TRANSITIONS=307} [2024-06-27 19:35:04,266 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 176 predicate places. [2024-06-27 19:35:04,266 INFO L495 AbstractCegarLoop]: Abstraction has has 220 places, 307 transitions, 3921 flow [2024-06-27 19:35:04,271 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.777777777777779) internal successors, (79), 9 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:35:04,271 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:35:04,271 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:35:04,271 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2024-06-27 19:35:04,272 INFO L420 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:35:04,272 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:35:04,272 INFO L85 PathProgramCache]: Analyzing trace with hash -370409721, now seen corresponding path program 2 times [2024-06-27 19:35:04,272 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:35:04,272 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [863566929] [2024-06-27 19:35:04,272 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:35:04,272 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:35:04,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:35:05,551 INFO 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 19:35:05,551 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:35:05,552 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [863566929] [2024-06-27 19:35:05,552 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [863566929] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:35:05,552 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:35:05,552 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-27 19:35:05,552 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1784057673] [2024-06-27 19:35:05,552 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:35:05,552 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-27 19:35:05,552 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:35:05,553 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-27 19:35:05,553 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2024-06-27 19:35:05,690 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 43 [2024-06-27 19:35:05,691 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 220 places, 307 transitions, 3921 flow. Second operand has 12 states, 12 states have (on average 8.333333333333334) internal successors, (100), 12 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:35:05,691 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:35:05,691 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 43 [2024-06-27 19:35:05,691 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:35:07,166 INFO L124 PetriNetUnfolderBase]: 4390/6522 cut-off events. [2024-06-27 19:35:07,166 INFO L125 PetriNetUnfolderBase]: For 516156/516158 co-relation queries the response was YES. [2024-06-27 19:35:07,238 INFO L83 FinitePrefix]: Finished finitePrefix Result has 55607 conditions, 6522 events. 4390/6522 cut-off events. For 516156/516158 co-relation queries the response was YES. Maximal size of possible extension queue 264. Compared 33753 event pairs, 1129 based on Foata normal form. 18/6538 useless extension candidates. Maximal degree in co-relation 55503. Up to 5954 conditions per place. [2024-06-27 19:35:07,270 INFO L140 encePairwiseOnDemand]: 30/43 looper letters, 342 selfloop transitions, 36 changer transitions 0/381 dead transitions. [2024-06-27 19:35:07,270 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 229 places, 381 transitions, 5320 flow [2024-06-27 19:35:07,271 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 19:35:07,271 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 19:35:07,272 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 180 transitions. [2024-06-27 19:35:07,272 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4186046511627907 [2024-06-27 19:35:07,272 INFO L175 Difference]: Start difference. First operand has 220 places, 307 transitions, 3921 flow. Second operand 10 states and 180 transitions. [2024-06-27 19:35:07,273 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 229 places, 381 transitions, 5320 flow [2024-06-27 19:35:08,001 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 225 places, 381 transitions, 5224 flow, removed 17 selfloop flow, removed 4 redundant places. [2024-06-27 19:35:08,005 INFO L231 Difference]: Finished difference. Result has 230 places, 327 transitions, 4224 flow [2024-06-27 19:35:08,006 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3845, PETRI_DIFFERENCE_MINUEND_PLACES=216, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=307, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=280, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=4224, PETRI_PLACES=230, PETRI_TRANSITIONS=327} [2024-06-27 19:35:08,006 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 186 predicate places. [2024-06-27 19:35:08,006 INFO L495 AbstractCegarLoop]: Abstraction has has 230 places, 327 transitions, 4224 flow [2024-06-27 19:35:08,006 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 8.333333333333334) internal successors, (100), 12 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:35:08,006 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:35:08,006 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:35:08,007 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2024-06-27 19:35:08,007 INFO L420 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:35:08,007 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:35:08,007 INFO L85 PathProgramCache]: Analyzing trace with hash 2033059257, now seen corresponding path program 3 times [2024-06-27 19:35:08,007 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:35:08,007 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [584983727] [2024-06-27 19:35:08,007 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:35:08,007 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:35:08,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:35:09,503 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:35:09,503 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:35:09,503 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [584983727] [2024-06-27 19:35:09,503 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [584983727] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:35:09,503 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:35:09,503 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-27 19:35:09,504 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1712669514] [2024-06-27 19:35:09,504 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:35:09,504 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-27 19:35:09,504 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:35:09,504 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-27 19:35:09,504 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2024-06-27 19:35:09,648 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 43 [2024-06-27 19:35:09,648 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 230 places, 327 transitions, 4224 flow. Second operand has 12 states, 12 states have (on average 8.333333333333334) internal successors, (100), 12 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:35:09,648 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:35:09,648 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 43 [2024-06-27 19:35:09,648 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:35:11,310 INFO L124 PetriNetUnfolderBase]: 4448/6620 cut-off events. [2024-06-27 19:35:11,310 INFO L125 PetriNetUnfolderBase]: For 542636/542640 co-relation queries the response was YES. [2024-06-27 19:35:11,356 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56939 conditions, 6620 events. 4448/6620 cut-off events. For 542636/542640 co-relation queries the response was YES. Maximal size of possible extension queue 271. Compared 34634 event pairs, 1159 based on Foata normal form. 20/6638 useless extension candidates. Maximal degree in co-relation 56829. Up to 5608 conditions per place. [2024-06-27 19:35:11,384 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 333 selfloop transitions, 42 changer transitions 0/378 dead transitions. [2024-06-27 19:35:11,384 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 238 places, 378 transitions, 5406 flow [2024-06-27 19:35:11,385 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 19:35:11,385 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 19:35:11,385 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 162 transitions. [2024-06-27 19:35:11,385 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4186046511627907 [2024-06-27 19:35:11,385 INFO L175 Difference]: Start difference. First operand has 230 places, 327 transitions, 4224 flow. Second operand 9 states and 162 transitions. [2024-06-27 19:35:11,386 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 238 places, 378 transitions, 5406 flow [2024-06-27 19:35:12,307 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 236 places, 378 transitions, 5374 flow, removed 13 selfloop flow, removed 2 redundant places. [2024-06-27 19:35:12,311 INFO L231 Difference]: Finished difference. Result has 237 places, 328 transitions, 4324 flow [2024-06-27 19:35:12,311 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=4192, PETRI_DIFFERENCE_MINUEND_PLACES=228, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=327, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=286, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4324, PETRI_PLACES=237, PETRI_TRANSITIONS=328} [2024-06-27 19:35:12,311 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 193 predicate places. [2024-06-27 19:35:12,312 INFO L495 AbstractCegarLoop]: Abstraction has has 237 places, 328 transitions, 4324 flow [2024-06-27 19:35:12,312 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 8.333333333333334) internal successors, (100), 12 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:35:12,312 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:35:12,326 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:35:12,326 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2024-06-27 19:35:12,326 INFO L420 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:35:12,327 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:35:12,327 INFO L85 PathProgramCache]: Analyzing trace with hash -543559683, now seen corresponding path program 4 times [2024-06-27 19:35:12,327 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:35:12,328 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [24070923] [2024-06-27 19:35:12,328 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:35:12,328 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:35:12,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:35:13,909 INFO 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 19:35:13,909 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:35:13,909 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [24070923] [2024-06-27 19:35:13,910 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [24070923] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:35:13,910 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:35:13,910 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2024-06-27 19:35:13,910 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1684748936] [2024-06-27 19:35:13,910 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:35:13,910 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-06-27 19:35:13,910 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:35:13,910 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-06-27 19:35:13,910 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2024-06-27 19:35:14,067 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 43 [2024-06-27 19:35:14,067 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 237 places, 328 transitions, 4324 flow. Second operand has 13 states, 13 states have (on average 8.23076923076923) internal successors, (107), 13 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 19:35:14,068 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:35:14,068 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 43 [2024-06-27 19:35:14,068 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:35:15,756 INFO L124 PetriNetUnfolderBase]: 4360/6484 cut-off events. [2024-06-27 19:35:15,757 INFO L125 PetriNetUnfolderBase]: For 544689/544693 co-relation queries the response was YES. [2024-06-27 19:35:15,799 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54525 conditions, 6484 events. 4360/6484 cut-off events. For 544689/544693 co-relation queries the response was YES. Maximal size of possible extension queue 268. Compared 33742 event pairs, 1169 based on Foata normal form. 52/6534 useless extension candidates. Maximal degree in co-relation 54413. Up to 5860 conditions per place. [2024-06-27 19:35:15,824 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 332 selfloop transitions, 37 changer transitions 0/372 dead transitions. [2024-06-27 19:35:15,824 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 245 places, 372 transitions, 5250 flow [2024-06-27 19:35:15,825 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 19:35:15,825 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 19:35:15,825 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 156 transitions. [2024-06-27 19:35:15,825 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40310077519379844 [2024-06-27 19:35:15,826 INFO L175 Difference]: Start difference. First operand has 237 places, 328 transitions, 4324 flow. Second operand 9 states and 156 transitions. [2024-06-27 19:35:15,826 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 245 places, 372 transitions, 5250 flow [2024-06-27 19:35:16,784 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 237 places, 372 transitions, 5084 flow, removed 33 selfloop flow, removed 8 redundant places. [2024-06-27 19:35:16,788 INFO L231 Difference]: Finished difference. Result has 238 places, 328 transitions, 4242 flow [2024-06-27 19:35:16,788 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=4158, PETRI_DIFFERENCE_MINUEND_PLACES=229, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=328, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=291, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4242, PETRI_PLACES=238, PETRI_TRANSITIONS=328} [2024-06-27 19:35:16,789 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 194 predicate places. [2024-06-27 19:35:16,789 INFO L495 AbstractCegarLoop]: Abstraction has has 238 places, 328 transitions, 4242 flow [2024-06-27 19:35:16,789 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 8.23076923076923) internal successors, (107), 13 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 19:35:16,789 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:35:16,789 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:35:16,789 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57 [2024-06-27 19:35:16,789 INFO L420 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:35:16,790 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:35:16,790 INFO L85 PathProgramCache]: Analyzing trace with hash -1290953650, now seen corresponding path program 1 times [2024-06-27 19:35:16,790 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:35:16,790 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1200803271] [2024-06-27 19:35:16,790 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:35:16,790 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:35:16,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:35:17,378 INFO 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 19:35:17,378 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:35:17,378 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1200803271] [2024-06-27 19:35:17,379 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1200803271] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:35:17,379 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:35:17,379 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 19:35:17,379 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1831659400] [2024-06-27 19:35:17,379 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:35:17,379 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 19:35:17,379 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:35:17,380 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 19:35:17,380 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-27 19:35:17,433 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 43 [2024-06-27 19:35:17,433 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 238 places, 328 transitions, 4242 flow. Second operand has 9 states, 9 states have (on average 8.666666666666666) internal successors, (78), 9 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:35:17,433 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:35:17,434 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 43 [2024-06-27 19:35:17,434 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:35:18,781 INFO L124 PetriNetUnfolderBase]: 4381/6517 cut-off events. [2024-06-27 19:35:18,782 INFO L125 PetriNetUnfolderBase]: For 490522/490528 co-relation queries the response was YES. [2024-06-27 19:35:18,823 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54140 conditions, 6517 events. 4381/6517 cut-off events. For 490522/490528 co-relation queries the response was YES. Maximal size of possible extension queue 268. Compared 33960 event pairs, 1292 based on Foata normal form. 6/6521 useless extension candidates. Maximal degree in co-relation 54028. Up to 6295 conditions per place. [2024-06-27 19:35:18,852 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 315 selfloop transitions, 43 changer transitions 0/361 dead transitions. [2024-06-27 19:35:18,853 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 244 places, 361 transitions, 5234 flow [2024-06-27 19:35:18,853 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 19:35:18,853 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 19:35:18,854 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 121 transitions. [2024-06-27 19:35:18,854 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4019933554817276 [2024-06-27 19:35:18,854 INFO L175 Difference]: Start difference. First operand has 238 places, 328 transitions, 4242 flow. Second operand 7 states and 121 transitions. [2024-06-27 19:35:18,854 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 244 places, 361 transitions, 5234 flow [2024-06-27 19:35:19,429 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 236 places, 361 transitions, 5150 flow, removed 2 selfloop flow, removed 8 redundant places. [2024-06-27 19:35:19,434 INFO L231 Difference]: Finished difference. Result has 239 places, 338 transitions, 4467 flow [2024-06-27 19:35:19,434 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=4158, PETRI_DIFFERENCE_MINUEND_PLACES=230, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=328, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=291, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4467, PETRI_PLACES=239, PETRI_TRANSITIONS=338} [2024-06-27 19:35:19,434 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 195 predicate places. [2024-06-27 19:35:19,434 INFO L495 AbstractCegarLoop]: Abstraction has has 239 places, 338 transitions, 4467 flow [2024-06-27 19:35:19,435 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.666666666666666) internal successors, (78), 9 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:35:19,435 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:35:19,435 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:35:19,435 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58 [2024-06-27 19:35:19,435 INFO L420 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:35:19,435 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:35:19,436 INFO L85 PathProgramCache]: Analyzing trace with hash 1861487176, now seen corresponding path program 2 times [2024-06-27 19:35:19,436 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:35:19,436 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2100490264] [2024-06-27 19:35:19,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:35:19,436 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:35:19,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:35:20,231 INFO 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 19:35:20,232 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:35:20,232 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2100490264] [2024-06-27 19:35:20,232 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2100490264] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:35:20,232 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:35:20,232 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 19:35:20,232 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [863895366] [2024-06-27 19:35:20,232 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:35:20,232 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 19:35:20,232 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:35:20,233 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 19:35:20,233 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-27 19:35:20,298 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 43 [2024-06-27 19:35:20,298 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 239 places, 338 transitions, 4467 flow. Second operand has 9 states, 9 states have (on average 8.666666666666666) internal successors, (78), 9 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:35:20,298 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:35:20,298 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 43 [2024-06-27 19:35:20,298 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:35:21,732 INFO L124 PetriNetUnfolderBase]: 4371/6501 cut-off events. [2024-06-27 19:35:21,732 INFO L125 PetriNetUnfolderBase]: For 504835/504841 co-relation queries the response was YES. [2024-06-27 19:35:21,772 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54784 conditions, 6501 events. 4371/6501 cut-off events. For 504835/504841 co-relation queries the response was YES. Maximal size of possible extension queue 267. Compared 33832 event pairs, 1258 based on Foata normal form. 6/6505 useless extension candidates. Maximal degree in co-relation 54669. Up to 6198 conditions per place. [2024-06-27 19:35:21,796 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 305 selfloop transitions, 55 changer transitions 0/363 dead transitions. [2024-06-27 19:35:21,797 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 245 places, 363 transitions, 5460 flow [2024-06-27 19:35:21,797 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 19:35:21,797 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 19:35:21,808 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 119 transitions. [2024-06-27 19:35:21,808 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3953488372093023 [2024-06-27 19:35:21,808 INFO L175 Difference]: Start difference. First operand has 239 places, 338 transitions, 4467 flow. Second operand 7 states and 119 transitions. [2024-06-27 19:35:21,808 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 245 places, 363 transitions, 5460 flow [2024-06-27 19:35:22,691 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 243 places, 363 transitions, 5363 flow, removed 33 selfloop flow, removed 2 redundant places. [2024-06-27 19:35:22,696 INFO L231 Difference]: Finished difference. Result has 245 places, 340 transitions, 4572 flow [2024-06-27 19:35:22,696 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=4380, PETRI_DIFFERENCE_MINUEND_PLACES=237, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=338, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=53, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=283, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4572, PETRI_PLACES=245, PETRI_TRANSITIONS=340} [2024-06-27 19:35:22,696 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 201 predicate places. [2024-06-27 19:35:22,696 INFO L495 AbstractCegarLoop]: Abstraction has has 245 places, 340 transitions, 4572 flow [2024-06-27 19:35:22,697 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.666666666666666) internal successors, (78), 9 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:35:22,697 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:35:22,697 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:35:22,697 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59 [2024-06-27 19:35:22,697 INFO L420 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:35:22,697 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:35:22,697 INFO L85 PathProgramCache]: Analyzing trace with hash 1624458451, now seen corresponding path program 5 times [2024-06-27 19:35:22,698 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:35:22,698 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [178676128] [2024-06-27 19:35:22,698 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:35:22,698 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:35:22,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:35:24,288 INFO 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 19:35:24,288 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:35:24,288 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [178676128] [2024-06-27 19:35:24,288 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [178676128] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:35:24,289 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:35:24,289 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2024-06-27 19:35:24,289 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1432214343] [2024-06-27 19:35:24,289 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:35:24,289 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-06-27 19:35:24,289 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:35:24,289 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-06-27 19:35:24,290 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2024-06-27 19:35:24,399 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 43 [2024-06-27 19:35:24,399 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 245 places, 340 transitions, 4572 flow. Second operand has 13 states, 13 states have (on average 8.23076923076923) internal successors, (107), 13 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 19:35:24,399 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:35:24,399 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 43 [2024-06-27 19:35:24,399 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:35:26,349 INFO L124 PetriNetUnfolderBase]: 4463/6654 cut-off events. [2024-06-27 19:35:26,350 INFO L125 PetriNetUnfolderBase]: For 530898/530900 co-relation queries the response was YES. [2024-06-27 19:35:26,399 INFO L83 FinitePrefix]: Finished finitePrefix Result has 55889 conditions, 6654 events. 4463/6654 cut-off events. For 530898/530900 co-relation queries the response was YES. Maximal size of possible extension queue 277. Compared 34872 event pairs, 901 based on Foata normal form. 24/6676 useless extension candidates. Maximal degree in co-relation 55771. Up to 5550 conditions per place. [2024-06-27 19:35:26,426 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 312 selfloop transitions, 74 changer transitions 0/389 dead transitions. [2024-06-27 19:35:26,427 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 253 places, 389 transitions, 5598 flow [2024-06-27 19:35:26,427 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 19:35:26,427 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 19:35:26,427 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 168 transitions. [2024-06-27 19:35:26,428 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43410852713178294 [2024-06-27 19:35:26,428 INFO L175 Difference]: Start difference. First operand has 245 places, 340 transitions, 4572 flow. Second operand 9 states and 168 transitions. [2024-06-27 19:35:26,428 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 253 places, 389 transitions, 5598 flow [2024-06-27 19:35:27,207 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 248 places, 389 transitions, 5505 flow, removed 9 selfloop flow, removed 5 redundant places. [2024-06-27 19:35:27,211 INFO L231 Difference]: Finished difference. Result has 249 places, 341 transitions, 4676 flow [2024-06-27 19:35:27,212 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=4479, PETRI_DIFFERENCE_MINUEND_PLACES=240, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=340, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=73, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=266, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4676, PETRI_PLACES=249, PETRI_TRANSITIONS=341} [2024-06-27 19:35:27,212 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 205 predicate places. [2024-06-27 19:35:27,212 INFO L495 AbstractCegarLoop]: Abstraction has has 249 places, 341 transitions, 4676 flow [2024-06-27 19:35:27,212 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 8.23076923076923) internal successors, (107), 13 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 19:35:27,212 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:35:27,212 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:35:27,213 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60 [2024-06-27 19:35:27,213 INFO L420 AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:35:27,213 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:35:27,213 INFO L85 PathProgramCache]: Analyzing trace with hash 1053249599, now seen corresponding path program 1 times [2024-06-27 19:35:27,213 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:35:27,213 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1398916745] [2024-06-27 19:35:27,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:35:27,213 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:35:27,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:35:28,718 INFO 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 19:35:28,718 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:35:28,718 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1398916745] [2024-06-27 19:35:28,718 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1398916745] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:35:28,718 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:35:28,719 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2024-06-27 19:35:28,719 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [890893923] [2024-06-27 19:35:28,719 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:35:28,719 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-06-27 19:35:28,719 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:35:28,719 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-06-27 19:35:28,720 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2024-06-27 19:35:28,827 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 43 [2024-06-27 19:35:28,827 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 249 places, 341 transitions, 4676 flow. Second operand has 13 states, 13 states have (on average 8.23076923076923) internal successors, (107), 13 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 19:35:28,827 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:35:28,827 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 43 [2024-06-27 19:35:28,827 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:35:30,535 INFO L124 PetriNetUnfolderBase]: 4657/6972 cut-off events. [2024-06-27 19:35:30,535 INFO L125 PetriNetUnfolderBase]: For 558571/558573 co-relation queries the response was YES. [2024-06-27 19:35:30,589 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59395 conditions, 6972 events. 4657/6972 cut-off events. For 558571/558573 co-relation queries the response was YES. Maximal size of possible extension queue 296. Compared 37146 event pairs, 938 based on Foata normal form. 16/6986 useless extension candidates. Maximal degree in co-relation 59277. Up to 5230 conditions per place. [2024-06-27 19:35:30,618 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 314 selfloop transitions, 79 changer transitions 0/396 dead transitions. [2024-06-27 19:35:30,619 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 257 places, 396 transitions, 5966 flow [2024-06-27 19:35:30,619 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 19:35:30,619 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 19:35:30,620 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 172 transitions. [2024-06-27 19:35:30,620 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4444444444444444 [2024-06-27 19:35:30,620 INFO L175 Difference]: Start difference. First operand has 249 places, 341 transitions, 4676 flow. Second operand 9 states and 172 transitions. [2024-06-27 19:35:30,620 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 257 places, 396 transitions, 5966 flow [2024-06-27 19:35:31,513 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 250 places, 396 transitions, 5797 flow, removed 12 selfloop flow, removed 7 redundant places. [2024-06-27 19:35:31,517 INFO L231 Difference]: Finished difference. Result has 251 places, 343 transitions, 4757 flow [2024-06-27 19:35:31,518 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=4507, PETRI_DIFFERENCE_MINUEND_PLACES=242, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=341, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=78, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=263, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4757, PETRI_PLACES=251, PETRI_TRANSITIONS=343} [2024-06-27 19:35:31,518 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 207 predicate places. [2024-06-27 19:35:31,518 INFO L495 AbstractCegarLoop]: Abstraction has has 251 places, 343 transitions, 4757 flow [2024-06-27 19:35:31,518 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 8.23076923076923) internal successors, (107), 13 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 19:35:31,518 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:35:31,518 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:35:31,518 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61 [2024-06-27 19:35:31,518 INFO L420 AbstractCegarLoop]: === Iteration 63 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:35:31,519 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:35:31,519 INFO L85 PathProgramCache]: Analyzing trace with hash -657078455, now seen corresponding path program 6 times [2024-06-27 19:35:31,519 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:35:31,519 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [195066177] [2024-06-27 19:35:31,519 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:35:31,519 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:35:31,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:35:32,958 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:35:32,958 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:35:32,958 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [195066177] [2024-06-27 19:35:32,958 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [195066177] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:35:32,958 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:35:32,958 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-27 19:35:32,958 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1783484193] [2024-06-27 19:35:32,958 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:35:32,958 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-27 19:35:32,958 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:35:32,959 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-27 19:35:32,959 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2024-06-27 19:35:33,049 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 43 [2024-06-27 19:35:33,049 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 251 places, 343 transitions, 4757 flow. Second operand has 12 states, 12 states have (on average 8.333333333333334) internal successors, (100), 12 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:35:33,049 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:35:33,049 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 43 [2024-06-27 19:35:33,049 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:35:34,750 INFO L124 PetriNetUnfolderBase]: 4613/6904 cut-off events. [2024-06-27 19:35:34,750 INFO L125 PetriNetUnfolderBase]: For 556426/556428 co-relation queries the response was YES. [2024-06-27 19:35:34,816 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58091 conditions, 6904 events. 4613/6904 cut-off events. For 556426/556428 co-relation queries the response was YES. Maximal size of possible extension queue 292. Compared 36680 event pairs, 929 based on Foata normal form. 24/6926 useless extension candidates. Maximal degree in co-relation 57972. Up to 5800 conditions per place. [2024-06-27 19:35:34,845 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 315 selfloop transitions, 74 changer transitions 0/392 dead transitions. [2024-06-27 19:35:34,845 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 259 places, 392 transitions, 5755 flow [2024-06-27 19:35:34,846 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 19:35:34,846 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 19:35:34,846 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 170 transitions. [2024-06-27 19:35:34,846 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4392764857881137 [2024-06-27 19:35:34,846 INFO L175 Difference]: Start difference. First operand has 251 places, 343 transitions, 4757 flow. Second operand 9 states and 170 transitions. [2024-06-27 19:35:34,847 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 259 places, 392 transitions, 5755 flow [2024-06-27 19:35:35,882 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 254 places, 392 transitions, 5618 flow, removed 25 selfloop flow, removed 5 redundant places. [2024-06-27 19:35:35,886 INFO L231 Difference]: Finished difference. Result has 255 places, 343 transitions, 4775 flow [2024-06-27 19:35:35,887 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=4620, PETRI_DIFFERENCE_MINUEND_PLACES=246, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=343, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=74, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=269, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4775, PETRI_PLACES=255, PETRI_TRANSITIONS=343} [2024-06-27 19:35:35,888 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 211 predicate places. [2024-06-27 19:35:35,888 INFO L495 AbstractCegarLoop]: Abstraction has has 255 places, 343 transitions, 4775 flow [2024-06-27 19:35:35,888 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 8.333333333333334) internal successors, (100), 12 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:35:35,888 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:35:35,888 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:35:35,888 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62 [2024-06-27 19:35:35,888 INFO L420 AbstractCegarLoop]: === Iteration 64 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:35:35,889 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:35:35,889 INFO L85 PathProgramCache]: Analyzing trace with hash 880336125, now seen corresponding path program 7 times [2024-06-27 19:35:35,889 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:35:35,889 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [113246541] [2024-06-27 19:35:35,889 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:35:35,890 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:35:35,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:35:37,573 INFO 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 19:35:37,573 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:35:37,573 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [113246541] [2024-06-27 19:35:37,574 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [113246541] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:35:37,574 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:35:37,574 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-27 19:35:37,574 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1525111405] [2024-06-27 19:35:37,574 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:35:37,575 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-27 19:35:37,575 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:35:37,575 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-27 19:35:37,575 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2024-06-27 19:35:37,696 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 43 [2024-06-27 19:35:37,697 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 255 places, 343 transitions, 4775 flow. Second operand has 12 states, 12 states have (on average 8.333333333333334) internal successors, (100), 12 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:35:37,697 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:35:37,697 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 43 [2024-06-27 19:35:37,697 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:35:39,371 INFO L124 PetriNetUnfolderBase]: 4671/7002 cut-off events. [2024-06-27 19:35:39,372 INFO L125 PetriNetUnfolderBase]: For 563118/563120 co-relation queries the response was YES. [2024-06-27 19:35:39,430 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59019 conditions, 7002 events. 4671/7002 cut-off events. For 563118/563120 co-relation queries the response was YES. Maximal size of possible extension queue 296. Compared 37411 event pairs, 932 based on Foata normal form. 16/7016 useless extension candidates. Maximal degree in co-relation 58898. Up to 5612 conditions per place. [2024-06-27 19:35:39,463 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 316 selfloop transitions, 77 changer transitions 0/396 dead transitions. [2024-06-27 19:35:39,463 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 263 places, 396 transitions, 5861 flow [2024-06-27 19:35:39,463 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 19:35:39,464 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 19:35:39,464 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 172 transitions. [2024-06-27 19:35:39,464 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4444444444444444 [2024-06-27 19:35:39,464 INFO L175 Difference]: Start difference. First operand has 255 places, 343 transitions, 4775 flow. Second operand 9 states and 172 transitions. [2024-06-27 19:35:39,464 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 263 places, 396 transitions, 5861 flow [2024-06-27 19:35:40,404 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 255 places, 396 transitions, 5695 flow, removed 3 selfloop flow, removed 8 redundant places. [2024-06-27 19:35:40,408 INFO L231 Difference]: Finished difference. Result has 256 places, 344 transitions, 4815 flow [2024-06-27 19:35:40,409 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=4609, PETRI_DIFFERENCE_MINUEND_PLACES=247, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=343, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=76, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=266, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4815, PETRI_PLACES=256, PETRI_TRANSITIONS=344} [2024-06-27 19:35:40,409 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 212 predicate places. [2024-06-27 19:35:40,409 INFO L495 AbstractCegarLoop]: Abstraction has has 256 places, 344 transitions, 4815 flow [2024-06-27 19:35:40,409 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 8.333333333333334) internal successors, (100), 12 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:35:40,409 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:35:40,409 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:35:40,410 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63 [2024-06-27 19:35:40,410 INFO L420 AbstractCegarLoop]: === Iteration 65 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:35:40,410 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:35:40,410 INFO L85 PathProgramCache]: Analyzing trace with hash -1026912699, now seen corresponding path program 1 times [2024-06-27 19:35:40,410 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:35:40,410 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1241269174] [2024-06-27 19:35:40,410 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:35:40,411 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:35:40,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:35:41,009 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:35:41,010 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:35:41,010 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1241269174] [2024-06-27 19:35:41,010 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1241269174] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:35:41,010 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:35:41,010 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 19:35:41,010 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1532196329] [2024-06-27 19:35:41,010 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:35:41,010 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 19:35:41,011 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:35:41,011 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 19:35:41,011 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2024-06-27 19:35:41,061 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 43 [2024-06-27 19:35:41,061 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 256 places, 344 transitions, 4815 flow. Second operand has 9 states, 9 states have (on average 8.666666666666666) internal successors, (78), 9 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:35:41,061 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:35:41,061 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 43 [2024-06-27 19:35:41,061 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:35:42,432 INFO L124 PetriNetUnfolderBase]: 4681/7018 cut-off events. [2024-06-27 19:35:42,432 INFO L125 PetriNetUnfolderBase]: For 567071/567079 co-relation queries the response was YES. [2024-06-27 19:35:42,487 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59455 conditions, 7018 events. 4681/7018 cut-off events. For 567071/567079 co-relation queries the response was YES. Maximal size of possible extension queue 297. Compared 37643 event pairs, 1413 based on Foata normal form. 8/7022 useless extension candidates. Maximal degree in co-relation 59333. Up to 6795 conditions per place. [2024-06-27 19:35:42,533 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 325 selfloop transitions, 47 changer transitions 0/375 dead transitions. [2024-06-27 19:35:42,533 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 262 places, 375 transitions, 5835 flow [2024-06-27 19:35:42,533 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 19:35:42,533 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 19:35:42,534 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 119 transitions. [2024-06-27 19:35:42,534 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3953488372093023 [2024-06-27 19:35:42,534 INFO L175 Difference]: Start difference. First operand has 256 places, 344 transitions, 4815 flow. Second operand 7 states and 119 transitions. [2024-06-27 19:35:42,534 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 262 places, 375 transitions, 5835 flow [2024-06-27 19:35:43,668 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 255 places, 375 transitions, 5645 flow, removed 17 selfloop flow, removed 7 redundant places. [2024-06-27 19:35:43,673 INFO L231 Difference]: Finished difference. Result has 258 places, 353 transitions, 4939 flow [2024-06-27 19:35:43,673 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=4629, PETRI_DIFFERENCE_MINUEND_PLACES=249, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=344, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=302, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4939, PETRI_PLACES=258, PETRI_TRANSITIONS=353} [2024-06-27 19:35:43,673 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 214 predicate places. [2024-06-27 19:35:43,674 INFO L495 AbstractCegarLoop]: Abstraction has has 258 places, 353 transitions, 4939 flow [2024-06-27 19:35:43,674 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.666666666666666) internal successors, (78), 9 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:35:43,674 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:35:43,674 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:35:43,674 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64 [2024-06-27 19:35:43,674 INFO L420 AbstractCegarLoop]: === Iteration 66 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:35:43,674 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:35:43,674 INFO L85 PathProgramCache]: Analyzing trace with hash -819842402, now seen corresponding path program 1 times [2024-06-27 19:35:43,675 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:35:43,675 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1348334196] [2024-06-27 19:35:43,675 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:35:43,675 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:35:43,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:35:44,211 INFO 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 19:35:44,212 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:35:44,212 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1348334196] [2024-06-27 19:35:44,212 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1348334196] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:35:44,212 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:35:44,212 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:35:44,212 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1118297488] [2024-06-27 19:35:44,212 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:35:44,212 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:35:44,213 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:35:44,213 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:35:44,213 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:35:44,257 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 43 [2024-06-27 19:35:44,257 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 258 places, 353 transitions, 4939 flow. Second operand has 8 states, 8 states have (on average 8.875) internal successors, (71), 8 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:35:44,257 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:35:44,257 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 43 [2024-06-27 19:35:44,257 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:35:45,650 INFO L124 PetriNetUnfolderBase]: 4669/7004 cut-off events. [2024-06-27 19:35:45,650 INFO L125 PetriNetUnfolderBase]: For 578103/578114 co-relation queries the response was YES. [2024-06-27 19:35:45,701 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59414 conditions, 7004 events. 4669/7004 cut-off events. For 578103/578114 co-relation queries the response was YES. Maximal size of possible extension queue 295. Compared 37578 event pairs, 1431 based on Foata normal form. 10/7009 useless extension candidates. Maximal degree in co-relation 59289. Up to 6461 conditions per place. [2024-06-27 19:35:45,727 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 271 selfloop transitions, 98 changer transitions 0/372 dead transitions. [2024-06-27 19:35:45,727 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 264 places, 372 transitions, 5919 flow [2024-06-27 19:35:45,728 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 19:35:45,728 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 19:35:45,728 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 118 transitions. [2024-06-27 19:35:45,728 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3920265780730897 [2024-06-27 19:35:45,728 INFO L175 Difference]: Start difference. First operand has 258 places, 353 transitions, 4939 flow. Second operand 7 states and 118 transitions. [2024-06-27 19:35:45,728 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 264 places, 372 transitions, 5919 flow [2024-06-27 19:35:46,700 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 261 places, 372 transitions, 5789 flow, removed 31 selfloop flow, removed 3 redundant places. [2024-06-27 19:35:46,709 INFO L231 Difference]: Finished difference. Result has 262 places, 353 transitions, 5015 flow [2024-06-27 19:35:46,709 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=4809, PETRI_DIFFERENCE_MINUEND_PLACES=255, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=353, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=98, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=255, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=5015, PETRI_PLACES=262, PETRI_TRANSITIONS=353} [2024-06-27 19:35:46,710 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 218 predicate places. [2024-06-27 19:35:46,710 INFO L495 AbstractCegarLoop]: Abstraction has has 262 places, 353 transitions, 5015 flow [2024-06-27 19:35:46,710 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.875) internal successors, (71), 8 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:35:46,710 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:35:46,710 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:35:46,710 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65 [2024-06-27 19:35:46,710 INFO L420 AbstractCegarLoop]: === Iteration 67 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:35:46,710 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:35:46,711 INFO L85 PathProgramCache]: Analyzing trace with hash -989980238, now seen corresponding path program 3 times [2024-06-27 19:35:46,711 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:35:46,711 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [381479228] [2024-06-27 19:35:46,711 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:35:46,711 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:35:46,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:35:47,351 INFO 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 19:35:47,351 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:35:47,351 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [381479228] [2024-06-27 19:35:47,351 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [381479228] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:35:47,352 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:35:47,352 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 19:35:47,352 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [999521608] [2024-06-27 19:35:47,352 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:35:47,352 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 19:35:47,352 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:35:47,352 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 19:35:47,353 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2024-06-27 19:35:47,399 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 43 [2024-06-27 19:35:47,399 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 262 places, 353 transitions, 5015 flow. Second operand has 9 states, 9 states have (on average 8.666666666666666) internal successors, (78), 9 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:35:47,399 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:35:47,399 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 43 [2024-06-27 19:35:47,399 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:35:49,019 INFO L124 PetriNetUnfolderBase]: 4669/7001 cut-off events. [2024-06-27 19:35:49,020 INFO L125 PetriNetUnfolderBase]: For 590732/590741 co-relation queries the response was YES. [2024-06-27 19:35:49,069 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59815 conditions, 7001 events. 4669/7001 cut-off events. For 590732/590741 co-relation queries the response was YES. Maximal size of possible extension queue 295. Compared 37478 event pairs, 1388 based on Foata normal form. 8/7004 useless extension candidates. Maximal degree in co-relation 59689. Up to 6775 conditions per place. [2024-06-27 19:35:49,097 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 328 selfloop transitions, 45 changer transitions 0/376 dead transitions. [2024-06-27 19:35:49,097 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 268 places, 376 transitions, 5949 flow [2024-06-27 19:35:49,098 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 19:35:49,098 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 19:35:49,098 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 117 transitions. [2024-06-27 19:35:49,098 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38870431893687707 [2024-06-27 19:35:49,098 INFO L175 Difference]: Start difference. First operand has 262 places, 353 transitions, 5015 flow. Second operand 7 states and 117 transitions. [2024-06-27 19:35:49,098 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 268 places, 376 transitions, 5949 flow [2024-06-27 19:35:50,214 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 263 places, 376 transitions, 5739 flow, removed 6 selfloop flow, removed 5 redundant places. [2024-06-27 19:35:50,219 INFO L231 Difference]: Finished difference. Result has 264 places, 356 transitions, 5003 flow [2024-06-27 19:35:50,219 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=4811, PETRI_DIFFERENCE_MINUEND_PLACES=257, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=353, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=42, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=308, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=5003, PETRI_PLACES=264, PETRI_TRANSITIONS=356} [2024-06-27 19:35:50,219 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 220 predicate places. [2024-06-27 19:35:50,220 INFO L495 AbstractCegarLoop]: Abstraction has has 264 places, 356 transitions, 5003 flow [2024-06-27 19:35:50,220 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.666666666666666) internal successors, (78), 9 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:35:50,220 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:35:50,220 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:35:50,220 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66 [2024-06-27 19:35:50,220 INFO L420 AbstractCegarLoop]: === Iteration 68 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:35:50,220 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:35:50,220 INFO L85 PathProgramCache]: Analyzing trace with hash 1536233135, now seen corresponding path program 2 times [2024-06-27 19:35:50,221 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:35:50,221 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [778368492] [2024-06-27 19:35:50,221 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:35:50,221 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:35:50,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:35:50,879 INFO 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 19:35:50,879 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:35:50,879 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [778368492] [2024-06-27 19:35:50,879 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [778368492] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:35:50,879 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:35:50,879 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 19:35:50,879 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [207626637] [2024-06-27 19:35:50,879 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:35:50,879 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 19:35:50,879 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:35:50,880 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 19:35:50,880 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2024-06-27 19:35:50,922 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 43 [2024-06-27 19:35:50,923 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 264 places, 356 transitions, 5003 flow. Second operand has 9 states, 9 states have (on average 8.666666666666666) internal successors, (78), 9 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:35:50,923 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:35:50,923 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 43 [2024-06-27 19:35:50,923 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:35:52,475 INFO L124 PetriNetUnfolderBase]: 4669/7001 cut-off events. [2024-06-27 19:35:52,476 INFO L125 PetriNetUnfolderBase]: For 604999/605008 co-relation queries the response was YES. [2024-06-27 19:35:52,536 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59880 conditions, 7001 events. 4669/7001 cut-off events. For 604999/605008 co-relation queries the response was YES. Maximal size of possible extension queue 296. Compared 37445 event pairs, 1387 based on Foata normal form. 8/7004 useless extension candidates. Maximal degree in co-relation 59753. Up to 6777 conditions per place. [2024-06-27 19:35:52,566 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 331 selfloop transitions, 45 changer transitions 0/379 dead transitions. [2024-06-27 19:35:52,567 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 270 places, 379 transitions, 5943 flow [2024-06-27 19:35:52,567 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 19:35:52,567 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 19:35:52,567 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 116 transitions. [2024-06-27 19:35:52,567 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3853820598006645 [2024-06-27 19:35:52,568 INFO L175 Difference]: Start difference. First operand has 264 places, 356 transitions, 5003 flow. Second operand 7 states and 116 transitions. [2024-06-27 19:35:52,568 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 270 places, 379 transitions, 5943 flow [2024-06-27 19:35:53,540 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 265 places, 379 transitions, 5835 flow, removed 18 selfloop flow, removed 5 redundant places. [2024-06-27 19:35:53,544 INFO L231 Difference]: Finished difference. Result has 266 places, 359 transitions, 5093 flow [2024-06-27 19:35:53,545 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=4895, PETRI_DIFFERENCE_MINUEND_PLACES=259, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=356, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=42, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=311, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=5093, PETRI_PLACES=266, PETRI_TRANSITIONS=359} [2024-06-27 19:35:53,545 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 222 predicate places. [2024-06-27 19:35:53,545 INFO L495 AbstractCegarLoop]: Abstraction has has 266 places, 359 transitions, 5093 flow [2024-06-27 19:35:53,545 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.666666666666666) internal successors, (78), 9 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:35:53,545 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:35:53,545 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:35:53,545 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67 [2024-06-27 19:35:53,546 INFO L420 AbstractCegarLoop]: === Iteration 69 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:35:53,546 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:35:53,546 INFO L85 PathProgramCache]: Analyzing trace with hash -448190363, now seen corresponding path program 8 times [2024-06-27 19:35:53,546 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:35:53,546 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [376280948] [2024-06-27 19:35:53,546 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:35:53,546 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:35:53,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:35:54,931 INFO 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 19:35:54,932 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:35:54,932 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [376280948] [2024-06-27 19:35:54,932 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [376280948] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:35:54,932 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:35:54,932 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-27 19:35:54,932 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1953770797] [2024-06-27 19:35:54,932 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:35:54,933 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-27 19:35:54,933 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:35:54,933 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-27 19:35:54,933 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2024-06-27 19:35:55,045 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 43 [2024-06-27 19:35:55,045 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 266 places, 359 transitions, 5093 flow. Second operand has 12 states, 12 states have (on average 8.333333333333334) internal successors, (100), 12 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:35:55,045 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:35:55,045 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 43 [2024-06-27 19:35:55,045 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:35:56,795 INFO L124 PetriNetUnfolderBase]: 4813/7244 cut-off events. [2024-06-27 19:35:56,795 INFO L125 PetriNetUnfolderBase]: For 648310/648315 co-relation queries the response was YES. [2024-06-27 19:35:56,856 INFO L83 FinitePrefix]: Finished finitePrefix Result has 62288 conditions, 7244 events. 4813/7244 cut-off events. For 648310/648315 co-relation queries the response was YES. Maximal size of possible extension queue 306. Compared 39214 event pairs, 984 based on Foata normal form. 18/7256 useless extension candidates. Maximal degree in co-relation 62161. Up to 5902 conditions per place. [2024-06-27 19:35:57,026 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 329 selfloop transitions, 79 changer transitions 0/411 dead transitions. [2024-06-27 19:35:57,026 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 274 places, 411 transitions, 6441 flow [2024-06-27 19:35:57,027 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 19:35:57,027 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 19:35:57,027 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 169 transitions. [2024-06-27 19:35:57,027 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43669250645994834 [2024-06-27 19:35:57,027 INFO L175 Difference]: Start difference. First operand has 266 places, 359 transitions, 5093 flow. Second operand 9 states and 169 transitions. [2024-06-27 19:35:57,027 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 274 places, 411 transitions, 6441 flow [2024-06-27 19:35:58,189 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 269 places, 411 transitions, 6316 flow, removed 17 selfloop flow, removed 5 redundant places. [2024-06-27 19:35:58,193 INFO L231 Difference]: Finished difference. Result has 270 places, 361 transitions, 5226 flow [2024-06-27 19:35:58,194 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=4968, PETRI_DIFFERENCE_MINUEND_PLACES=261, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=359, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=78, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=281, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5226, PETRI_PLACES=270, PETRI_TRANSITIONS=361} [2024-06-27 19:35:58,194 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 226 predicate places. [2024-06-27 19:35:58,194 INFO L495 AbstractCegarLoop]: Abstraction has has 270 places, 361 transitions, 5226 flow [2024-06-27 19:35:58,194 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 8.333333333333334) internal successors, (100), 12 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:35:58,194 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:35:58,194 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:35:58,195 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68 [2024-06-27 19:35:58,195 INFO L420 AbstractCegarLoop]: === Iteration 70 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:35:58,195 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:35:58,195 INFO L85 PathProgramCache]: Analyzing trace with hash 326363493, now seen corresponding path program 9 times [2024-06-27 19:35:58,196 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:35:58,196 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2054837980] [2024-06-27 19:35:58,196 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:35:58,196 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:35:58,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:35:59,508 INFO 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 19:35:59,508 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:35:59,509 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2054837980] [2024-06-27 19:35:59,509 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2054837980] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:35:59,509 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:35:59,509 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-27 19:35:59,509 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [524295407] [2024-06-27 19:35:59,509 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:35:59,509 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-27 19:35:59,510 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:35:59,510 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-27 19:35:59,510 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2024-06-27 19:35:59,606 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 43 [2024-06-27 19:35:59,606 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 270 places, 361 transitions, 5226 flow. Second operand has 12 states, 12 states have (on average 8.333333333333334) internal successors, (100), 12 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:35:59,606 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:35:59,607 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 43 [2024-06-27 19:35:59,607 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:36:01,525 INFO L124 PetriNetUnfolderBase]: 4905/7396 cut-off events. [2024-06-27 19:36:01,525 INFO L125 PetriNetUnfolderBase]: For 686204/686209 co-relation queries the response was YES. [2024-06-27 19:36:01,582 INFO L83 FinitePrefix]: Finished finitePrefix Result has 64065 conditions, 7396 events. 4905/7396 cut-off events. For 686204/686209 co-relation queries the response was YES. Maximal size of possible extension queue 315. Compared 40423 event pairs, 1009 based on Foata normal form. 26/7416 useless extension candidates. Maximal degree in co-relation 63937. Up to 6288 conditions per place. [2024-06-27 19:36:01,611 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 327 selfloop transitions, 77 changer transitions 0/407 dead transitions. [2024-06-27 19:36:01,611 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 278 places, 407 transitions, 6290 flow [2024-06-27 19:36:01,612 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 19:36:01,612 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 19:36:01,612 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 165 transitions. [2024-06-27 19:36:01,613 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4263565891472868 [2024-06-27 19:36:01,613 INFO L175 Difference]: Start difference. First operand has 270 places, 361 transitions, 5226 flow. Second operand 9 states and 165 transitions. [2024-06-27 19:36:01,613 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 278 places, 407 transitions, 6290 flow [2024-06-27 19:36:02,853 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 273 places, 407 transitions, 6147 flow, removed 26 selfloop flow, removed 5 redundant places. [2024-06-27 19:36:02,858 INFO L231 Difference]: Finished difference. Result has 274 places, 362 transitions, 5294 flow [2024-06-27 19:36:02,858 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=5091, PETRI_DIFFERENCE_MINUEND_PLACES=265, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=361, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=76, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=284, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5294, PETRI_PLACES=274, PETRI_TRANSITIONS=362} [2024-06-27 19:36:02,859 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 230 predicate places. [2024-06-27 19:36:02,859 INFO L495 AbstractCegarLoop]: Abstraction has has 274 places, 362 transitions, 5294 flow [2024-06-27 19:36:02,859 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 8.333333333333334) internal successors, (100), 12 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:36:02,859 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:36:02,859 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:36:02,859 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable69 [2024-06-27 19:36:02,859 INFO L420 AbstractCegarLoop]: === Iteration 71 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:36:02,859 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:36:02,860 INFO L85 PathProgramCache]: Analyzing trace with hash -1074845309, now seen corresponding path program 2 times [2024-06-27 19:36:02,860 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:36:02,860 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1363508901] [2024-06-27 19:36:02,860 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:36:02,860 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:36:02,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:36:04,616 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:36:04,616 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:36:04,616 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1363508901] [2024-06-27 19:36:04,616 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1363508901] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:36:04,616 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:36:04,617 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2024-06-27 19:36:04,617 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [714311571] [2024-06-27 19:36:04,617 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:36:04,617 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-06-27 19:36:04,617 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:36:04,617 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-06-27 19:36:04,617 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2024-06-27 19:36:04,757 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 43 [2024-06-27 19:36:04,758 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 274 places, 362 transitions, 5294 flow. Second operand has 13 states, 13 states have (on average 8.23076923076923) internal successors, (107), 13 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 19:36:04,758 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:36:04,758 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 43 [2024-06-27 19:36:04,758 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:36:06,647 INFO L124 PetriNetUnfolderBase]: 5099/7714 cut-off events. [2024-06-27 19:36:06,647 INFO L125 PetriNetUnfolderBase]: For 730366/730371 co-relation queries the response was YES. [2024-06-27 19:36:06,716 INFO L83 FinitePrefix]: Finished finitePrefix Result has 67683 conditions, 7714 events. 5099/7714 cut-off events. For 730366/730371 co-relation queries the response was YES. Maximal size of possible extension queue 334. Compared 42851 event pairs, 1049 based on Foata normal form. 18/7726 useless extension candidates. Maximal degree in co-relation 67553. Up to 6264 conditions per place. [2024-06-27 19:36:06,748 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 332 selfloop transitions, 81 changer transitions 0/416 dead transitions. [2024-06-27 19:36:06,748 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 282 places, 416 transitions, 6668 flow [2024-06-27 19:36:06,749 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 19:36:06,749 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 19:36:06,749 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 171 transitions. [2024-06-27 19:36:06,749 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4418604651162791 [2024-06-27 19:36:06,749 INFO L175 Difference]: Start difference. First operand has 274 places, 362 transitions, 5294 flow. Second operand 9 states and 171 transitions. [2024-06-27 19:36:06,749 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 282 places, 416 transitions, 6668 flow [2024-06-27 19:36:08,493 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 275 places, 416 transitions, 6495 flow, removed 11 selfloop flow, removed 7 redundant places. [2024-06-27 19:36:08,498 INFO L231 Difference]: Finished difference. Result has 277 places, 364 transitions, 5392 flow [2024-06-27 19:36:08,499 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=5121, PETRI_DIFFERENCE_MINUEND_PLACES=267, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=362, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=79, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=281, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5392, PETRI_PLACES=277, PETRI_TRANSITIONS=364} [2024-06-27 19:36:08,499 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 233 predicate places. [2024-06-27 19:36:08,499 INFO L495 AbstractCegarLoop]: Abstraction has has 277 places, 364 transitions, 5392 flow [2024-06-27 19:36:08,499 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 8.23076923076923) internal successors, (107), 13 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 19:36:08,499 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:36:08,499 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:36:08,500 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70 [2024-06-27 19:36:08,500 INFO L420 AbstractCegarLoop]: === Iteration 72 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:36:08,500 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:36:08,500 INFO L85 PathProgramCache]: Analyzing trace with hash 562718777, now seen corresponding path program 3 times [2024-06-27 19:36:08,500 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:36:08,500 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [627636704] [2024-06-27 19:36:08,500 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:36:08,500 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:36:08,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:36:10,247 INFO 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 19:36:10,248 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:36:10,248 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [627636704] [2024-06-27 19:36:10,248 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [627636704] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:36:10,248 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:36:10,248 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2024-06-27 19:36:10,248 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1537581087] [2024-06-27 19:36:10,248 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:36:10,249 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-06-27 19:36:10,249 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:36:10,249 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-06-27 19:36:10,249 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2024-06-27 19:36:10,390 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 43 [2024-06-27 19:36:10,391 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 277 places, 364 transitions, 5392 flow. Second operand has 13 states, 13 states have (on average 8.23076923076923) internal successors, (107), 13 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 19:36:10,391 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:36:10,391 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 43 [2024-06-27 19:36:10,391 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:36:12,323 INFO L124 PetriNetUnfolderBase]: 5055/7646 cut-off events. [2024-06-27 19:36:12,323 INFO L125 PetriNetUnfolderBase]: For 727853/727858 co-relation queries the response was YES. [2024-06-27 19:36:12,391 INFO L83 FinitePrefix]: Finished finitePrefix Result has 66295 conditions, 7646 events. 5055/7646 cut-off events. For 727853/727858 co-relation queries the response was YES. Maximal size of possible extension queue 330. Compared 42373 event pairs, 1039 based on Foata normal form. 26/7666 useless extension candidates. Maximal degree in co-relation 66163. Up to 6538 conditions per place. [2024-06-27 19:36:12,424 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 330 selfloop transitions, 78 changer transitions 0/411 dead transitions. [2024-06-27 19:36:12,424 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 285 places, 411 transitions, 6430 flow [2024-06-27 19:36:12,425 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 19:36:12,425 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 19:36:12,425 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 167 transitions. [2024-06-27 19:36:12,425 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4315245478036176 [2024-06-27 19:36:12,426 INFO L175 Difference]: Start difference. First operand has 277 places, 364 transitions, 5392 flow. Second operand 9 states and 167 transitions. [2024-06-27 19:36:12,426 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 285 places, 411 transitions, 6430 flow [2024-06-27 19:36:13,771 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 279 places, 411 transitions, 6223 flow, removed 28 selfloop flow, removed 6 redundant places. [2024-06-27 19:36:13,776 INFO L231 Difference]: Finished difference. Result has 280 places, 364 transitions, 5348 flow [2024-06-27 19:36:13,776 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=5185, PETRI_DIFFERENCE_MINUEND_PLACES=271, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=364, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=78, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=286, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5348, PETRI_PLACES=280, PETRI_TRANSITIONS=364} [2024-06-27 19:36:13,777 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 236 predicate places. [2024-06-27 19:36:13,777 INFO L495 AbstractCegarLoop]: Abstraction has has 280 places, 364 transitions, 5348 flow [2024-06-27 19:36:13,777 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 8.23076923076923) internal successors, (107), 13 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 19:36:13,777 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:36:13,777 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:36:13,777 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71 [2024-06-27 19:36:13,778 INFO L420 AbstractCegarLoop]: === Iteration 73 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:36:13,778 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:36:13,778 INFO L85 PathProgramCache]: Analyzing trace with hash -1034847057, now seen corresponding path program 4 times [2024-06-27 19:36:13,778 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:36:13,778 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1733048083] [2024-06-27 19:36:13,778 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:36:13,778 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:36:13,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:36:15,264 INFO 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 19:36:15,264 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:36:15,264 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1733048083] [2024-06-27 19:36:15,264 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1733048083] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:36:15,265 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:36:15,265 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-27 19:36:15,265 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1051484906] [2024-06-27 19:36:15,265 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:36:15,265 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-27 19:36:15,265 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:36:15,265 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-27 19:36:15,266 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2024-06-27 19:36:15,384 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 43 [2024-06-27 19:36:15,385 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 280 places, 364 transitions, 5348 flow. Second operand has 12 states, 12 states have (on average 8.333333333333334) internal successors, (100), 12 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:36:15,385 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:36:15,385 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 43 [2024-06-27 19:36:15,385 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:36:17,195 INFO L124 PetriNetUnfolderBase]: 5113/7739 cut-off events. [2024-06-27 19:36:17,195 INFO L125 PetriNetUnfolderBase]: For 734409/734409 co-relation queries the response was YES. [2024-06-27 19:36:17,263 INFO L83 FinitePrefix]: Finished finitePrefix Result has 66808 conditions, 7739 events. 5113/7739 cut-off events. For 734409/734409 co-relation queries the response was YES. Maximal size of possible extension queue 337. Compared 43232 event pairs, 1552 based on Foata normal form. 16/7753 useless extension candidates. Maximal degree in co-relation 66675. Up to 7248 conditions per place. [2024-06-27 19:36:17,297 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 384 selfloop transitions, 22 changer transitions 0/409 dead transitions. [2024-06-27 19:36:17,297 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 288 places, 409 transitions, 6620 flow [2024-06-27 19:36:17,297 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 19:36:17,298 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 19:36:17,298 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 156 transitions. [2024-06-27 19:36:17,298 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40310077519379844 [2024-06-27 19:36:17,298 INFO L175 Difference]: Start difference. First operand has 280 places, 364 transitions, 5348 flow. Second operand 9 states and 156 transitions. [2024-06-27 19:36:17,298 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 288 places, 409 transitions, 6620 flow [2024-06-27 19:36:18,933 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 280 places, 409 transitions, 6454 flow, removed 2 selfloop flow, removed 8 redundant places. [2024-06-27 19:36:18,938 INFO L231 Difference]: Finished difference. Result has 281 places, 365 transitions, 5284 flow [2024-06-27 19:36:18,939 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=5182, PETRI_DIFFERENCE_MINUEND_PLACES=272, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=364, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=342, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5284, PETRI_PLACES=281, PETRI_TRANSITIONS=365} [2024-06-27 19:36:18,939 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 237 predicate places. [2024-06-27 19:36:18,939 INFO L495 AbstractCegarLoop]: Abstraction has has 281 places, 365 transitions, 5284 flow [2024-06-27 19:36:18,939 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 8.333333333333334) internal successors, (100), 12 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:36:18,939 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:36:18,939 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:36:18,939 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72 [2024-06-27 19:36:18,939 INFO L420 AbstractCegarLoop]: === Iteration 74 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:36:18,940 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:36:18,940 INFO L85 PathProgramCache]: Analyzing trace with hash -177170189, now seen corresponding path program 5 times [2024-06-27 19:36:18,940 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:36:18,940 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1434315890] [2024-06-27 19:36:18,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:36:18,941 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:36:18,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:36:20,352 INFO 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 19:36:20,352 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:36:20,353 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1434315890] [2024-06-27 19:36:20,353 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1434315890] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:36:20,353 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:36:20,353 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2024-06-27 19:36:20,353 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [957171341] [2024-06-27 19:36:20,353 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:36:20,353 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-06-27 19:36:20,353 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:36:20,354 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-06-27 19:36:20,354 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2024-06-27 19:36:20,505 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 43 [2024-06-27 19:36:20,506 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 281 places, 365 transitions, 5284 flow. Second operand has 13 states, 13 states have (on average 8.23076923076923) internal successors, (107), 13 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 19:36:20,506 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:36:20,506 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 43 [2024-06-27 19:36:20,506 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:36:22,450 INFO L124 PetriNetUnfolderBase]: 5069/7671 cut-off events. [2024-06-27 19:36:22,450 INFO L125 PetriNetUnfolderBase]: For 730367/730367 co-relation queries the response was YES. [2024-06-27 19:36:22,508 INFO L83 FinitePrefix]: Finished finitePrefix Result has 64977 conditions, 7671 events. 5069/7671 cut-off events. For 730367/730367 co-relation queries the response was YES. Maximal size of possible extension queue 333. Compared 42783 event pairs, 1572 based on Foata normal form. 24/7693 useless extension candidates. Maximal degree in co-relation 64843. Up to 7374 conditions per place. [2024-06-27 19:36:22,537 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 380 selfloop transitions, 20 changer transitions 0/403 dead transitions. [2024-06-27 19:36:22,537 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 289 places, 403 transitions, 6248 flow [2024-06-27 19:36:22,538 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 19:36:22,538 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 19:36:22,538 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 150 transitions. [2024-06-27 19:36:22,538 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3875968992248062 [2024-06-27 19:36:22,538 INFO L175 Difference]: Start difference. First operand has 281 places, 365 transitions, 5284 flow. Second operand 9 states and 150 transitions. [2024-06-27 19:36:22,539 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 289 places, 403 transitions, 6248 flow [2024-06-27 19:36:24,164 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 282 places, 403 transitions, 6139 flow, removed 32 selfloop flow, removed 7 redundant places. [2024-06-27 19:36:24,169 INFO L231 Difference]: Finished difference. Result has 283 places, 365 transitions, 5222 flow [2024-06-27 19:36:24,169 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=5175, PETRI_DIFFERENCE_MINUEND_PLACES=274, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=365, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=345, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5222, PETRI_PLACES=283, PETRI_TRANSITIONS=365} [2024-06-27 19:36:24,169 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 239 predicate places. [2024-06-27 19:36:24,169 INFO L495 AbstractCegarLoop]: Abstraction has has 283 places, 365 transitions, 5222 flow [2024-06-27 19:36:24,170 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 8.23076923076923) internal successors, (107), 13 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 19:36:24,170 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:36:24,170 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:36:24,170 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73 [2024-06-27 19:36:24,170 INFO L420 AbstractCegarLoop]: === Iteration 75 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:36:24,170 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:36:24,170 INFO L85 PathProgramCache]: Analyzing trace with hash -784710251, now seen corresponding path program 6 times [2024-06-27 19:36:24,170 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:36:24,170 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2093435564] [2024-06-27 19:36:24,171 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:36:24,171 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:36:24,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:36:25,566 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:36:25,566 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:36:25,566 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2093435564] [2024-06-27 19:36:25,566 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2093435564] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:36:25,566 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:36:25,566 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2024-06-27 19:36:25,567 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1798311944] [2024-06-27 19:36:25,567 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:36:25,567 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-06-27 19:36:25,567 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:36:25,567 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-06-27 19:36:25,567 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2024-06-27 19:36:25,733 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 43 [2024-06-27 19:36:25,734 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 283 places, 365 transitions, 5222 flow. Second operand has 13 states, 13 states have (on average 8.23076923076923) internal successors, (107), 13 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 19:36:25,734 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:36:25,734 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 43 [2024-06-27 19:36:25,734 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:36:27,523 INFO L124 PetriNetUnfolderBase]: 5041/7627 cut-off events. [2024-06-27 19:36:27,523 INFO L125 PetriNetUnfolderBase]: For 704873/704873 co-relation queries the response was YES. [2024-06-27 19:36:27,586 INFO L83 FinitePrefix]: Finished finitePrefix Result has 63444 conditions, 7627 events. 5041/7627 cut-off events. For 704873/704873 co-relation queries the response was YES. Maximal size of possible extension queue 331. Compared 42379 event pairs, 1499 based on Foata normal form. 16/7641 useless extension candidates. Maximal degree in co-relation 63310. Up to 7036 conditions per place. [2024-06-27 19:36:27,615 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 383 selfloop transitions, 26 changer transitions 0/412 dead transitions. [2024-06-27 19:36:27,615 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 291 places, 412 transitions, 6184 flow [2024-06-27 19:36:27,616 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 19:36:27,616 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 19:36:27,616 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 169 transitions. [2024-06-27 19:36:27,616 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3930232558139535 [2024-06-27 19:36:27,617 INFO L175 Difference]: Start difference. First operand has 283 places, 365 transitions, 5222 flow. Second operand 10 states and 169 transitions. [2024-06-27 19:36:27,617 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 291 places, 412 transitions, 6184 flow [2024-06-27 19:36:29,238 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 282 places, 412 transitions, 6129 flow, removed 0 selfloop flow, removed 9 redundant places. [2024-06-27 19:36:29,243 INFO L231 Difference]: Finished difference. Result has 283 places, 364 transitions, 5141 flow [2024-06-27 19:36:29,243 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=5085, PETRI_DIFFERENCE_MINUEND_PLACES=273, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=364, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=338, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=5141, PETRI_PLACES=283, PETRI_TRANSITIONS=364} [2024-06-27 19:36:29,244 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 239 predicate places. [2024-06-27 19:36:29,244 INFO L495 AbstractCegarLoop]: Abstraction has has 283 places, 364 transitions, 5141 flow [2024-06-27 19:36:29,244 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 8.23076923076923) internal successors, (107), 13 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 19:36:29,244 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:36:29,244 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:36:29,244 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74 [2024-06-27 19:36:29,245 INFO L420 AbstractCegarLoop]: === Iteration 76 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:36:29,245 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:36:29,245 INFO L85 PathProgramCache]: Analyzing trace with hash 508817344, now seen corresponding path program 1 times [2024-06-27 19:36:29,245 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:36:29,245 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [805953116] [2024-06-27 19:36:29,245 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:36:29,245 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:36:29,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:36:30,171 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:36:30,171 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:36:30,172 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [805953116] [2024-06-27 19:36:30,172 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [805953116] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:36:30,172 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:36:30,172 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 19:36:30,172 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [416131148] [2024-06-27 19:36:30,172 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:36:30,172 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 19:36:30,172 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:36:30,172 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 19:36:30,172 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-27 19:36:30,229 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-27 19:36:30,229 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 283 places, 364 transitions, 5141 flow. Second operand has 10 states, 10 states have (on average 9.6) internal successors, (96), 10 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:36:30,229 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:36:30,230 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-27 19:36:30,230 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:36:31,841 INFO L124 PetriNetUnfolderBase]: 4816/7369 cut-off events. [2024-06-27 19:36:31,841 INFO L125 PetriNetUnfolderBase]: For 699335/699362 co-relation queries the response was YES. [2024-06-27 19:36:31,905 INFO L83 FinitePrefix]: Finished finitePrefix Result has 61685 conditions, 7369 events. 4816/7369 cut-off events. For 699335/699362 co-relation queries the response was YES. Maximal size of possible extension queue 332. Compared 41803 event pairs, 1283 based on Foata normal form. 18/7343 useless extension candidates. Maximal degree in co-relation 61550. Up to 6866 conditions per place. [2024-06-27 19:36:31,935 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 273 selfloop transitions, 72 changer transitions 0/387 dead transitions. [2024-06-27 19:36:31,935 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 291 places, 387 transitions, 5939 flow [2024-06-27 19:36:31,936 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 19:36:31,936 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 19:36:31,936 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 149 transitions. [2024-06-27 19:36:31,936 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3850129198966408 [2024-06-27 19:36:31,936 INFO L175 Difference]: Start difference. First operand has 283 places, 364 transitions, 5141 flow. Second operand 9 states and 149 transitions. [2024-06-27 19:36:31,936 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 291 places, 387 transitions, 5939 flow [2024-06-27 19:36:33,237 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 281 places, 387 transitions, 5672 flow, removed 29 selfloop flow, removed 10 redundant places. [2024-06-27 19:36:33,242 INFO L231 Difference]: Finished difference. Result has 282 places, 364 transitions, 5033 flow [2024-06-27 19:36:33,242 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=4874, PETRI_DIFFERENCE_MINUEND_PLACES=273, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=364, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=72, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=292, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5033, PETRI_PLACES=282, PETRI_TRANSITIONS=364} [2024-06-27 19:36:33,242 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 238 predicate places. [2024-06-27 19:36:33,242 INFO L495 AbstractCegarLoop]: Abstraction has has 282 places, 364 transitions, 5033 flow [2024-06-27 19:36:33,242 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.6) internal successors, (96), 10 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:36:33,243 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:36:33,243 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:36:33,243 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75 [2024-06-27 19:36:33,243 INFO L420 AbstractCegarLoop]: === Iteration 77 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:36:33,243 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:36:33,243 INFO L85 PathProgramCache]: Analyzing trace with hash 493162654, now seen corresponding path program 2 times [2024-06-27 19:36:33,243 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:36:33,243 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [426636847] [2024-06-27 19:36:33,243 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:36:33,244 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:36:33,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:36:34,327 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:36:34,327 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:36:34,327 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [426636847] [2024-06-27 19:36:34,327 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [426636847] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:36:34,327 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:36:34,327 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 19:36:34,328 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1760204157] [2024-06-27 19:36:34,328 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:36:34,328 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 19:36:34,328 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:36:34,328 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 19:36:34,328 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-27 19:36:34,420 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-27 19:36:34,420 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 282 places, 364 transitions, 5033 flow. Second operand has 10 states, 10 states have (on average 9.6) internal successors, (96), 10 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:36:34,420 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:36:34,420 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-27 19:36:34,420 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:36:36,031 INFO L124 PetriNetUnfolderBase]: 4809/7360 cut-off events. [2024-06-27 19:36:36,032 INFO L125 PetriNetUnfolderBase]: For 704431/704459 co-relation queries the response was YES. [2024-06-27 19:36:36,098 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60218 conditions, 7360 events. 4809/7360 cut-off events. For 704431/704459 co-relation queries the response was YES. Maximal size of possible extension queue 331. Compared 41727 event pairs, 1278 based on Foata normal form. 16/7333 useless extension candidates. Maximal degree in co-relation 60085. Up to 6817 conditions per place. [2024-06-27 19:36:36,127 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 267 selfloop transitions, 75 changer transitions 0/384 dead transitions. [2024-06-27 19:36:36,127 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 289 places, 384 transitions, 5809 flow [2024-06-27 19:36:36,127 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:36:36,128 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:36:36,128 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 137 transitions. [2024-06-27 19:36:36,128 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39825581395348836 [2024-06-27 19:36:36,128 INFO L175 Difference]: Start difference. First operand has 282 places, 364 transitions, 5033 flow. Second operand 8 states and 137 transitions. [2024-06-27 19:36:36,128 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 289 places, 384 transitions, 5809 flow [2024-06-27 19:36:37,755 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 281 places, 384 transitions, 5625 flow, removed 12 selfloop flow, removed 8 redundant places. [2024-06-27 19:36:37,760 INFO L231 Difference]: Finished difference. Result has 282 places, 364 transitions, 5008 flow [2024-06-27 19:36:37,760 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=4849, PETRI_DIFFERENCE_MINUEND_PLACES=274, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=364, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=75, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=289, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5008, PETRI_PLACES=282, PETRI_TRANSITIONS=364} [2024-06-27 19:36:37,761 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 238 predicate places. [2024-06-27 19:36:37,761 INFO L495 AbstractCegarLoop]: Abstraction has has 282 places, 364 transitions, 5008 flow [2024-06-27 19:36:37,761 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.6) internal successors, (96), 10 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:36:37,761 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:36:37,761 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:36:37,761 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76 [2024-06-27 19:36:37,761 INFO L420 AbstractCegarLoop]: === Iteration 78 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:36:37,761 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:36:37,762 INFO L85 PathProgramCache]: Analyzing trace with hash 1802357130, now seen corresponding path program 1 times [2024-06-27 19:36:37,762 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:36:37,762 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1215859651] [2024-06-27 19:36:37,762 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:36:37,762 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:36:37,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:36:38,852 INFO 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 19:36:38,852 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:36:38,853 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1215859651] [2024-06-27 19:36:38,853 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1215859651] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:36:38,853 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:36:38,853 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 19:36:38,853 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1958383270] [2024-06-27 19:36:38,853 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:36:38,854 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 19:36:38,854 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:36:38,854 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 19:36:38,854 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-27 19:36:38,926 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 43 [2024-06-27 19:36:38,926 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 282 places, 364 transitions, 5008 flow. Second operand has 10 states, 10 states have (on average 8.6) internal successors, (86), 10 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:36:38,927 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:36:38,927 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 43 [2024-06-27 19:36:38,927 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:36:40,543 INFO L124 PetriNetUnfolderBase]: 5037/7623 cut-off events. [2024-06-27 19:36:40,543 INFO L125 PetriNetUnfolderBase]: For 715406/715406 co-relation queries the response was YES. [2024-06-27 19:36:40,608 INFO L83 FinitePrefix]: Finished finitePrefix Result has 61930 conditions, 7623 events. 5037/7623 cut-off events. For 715406/715406 co-relation queries the response was YES. Maximal size of possible extension queue 330. Compared 42448 event pairs, 1552 based on Foata normal form. 2/7623 useless extension candidates. Maximal degree in co-relation 61797. Up to 7550 conditions per place. [2024-06-27 19:36:40,639 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 368 selfloop transitions, 19 changer transitions 0/390 dead transitions. [2024-06-27 19:36:40,639 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 289 places, 390 transitions, 5942 flow [2024-06-27 19:36:40,639 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:36:40,640 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:36:40,640 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 122 transitions. [2024-06-27 19:36:40,640 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3546511627906977 [2024-06-27 19:36:40,640 INFO L175 Difference]: Start difference. First operand has 282 places, 364 transitions, 5008 flow. Second operand 8 states and 122 transitions. [2024-06-27 19:36:40,640 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 289 places, 390 transitions, 5942 flow [2024-06-27 19:36:42,445 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 283 places, 390 transitions, 5752 flow, removed 10 selfloop flow, removed 6 redundant places. [2024-06-27 19:36:42,450 INFO L231 Difference]: Finished difference. Result has 285 places, 370 transitions, 4974 flow [2024-06-27 19:36:42,450 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=4818, PETRI_DIFFERENCE_MINUEND_PLACES=276, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=364, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=345, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4974, PETRI_PLACES=285, PETRI_TRANSITIONS=370} [2024-06-27 19:36:42,453 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 241 predicate places. [2024-06-27 19:36:42,453 INFO L495 AbstractCegarLoop]: Abstraction has has 285 places, 370 transitions, 4974 flow [2024-06-27 19:36:42,454 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.6) internal successors, (86), 10 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:36:42,454 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:36:42,454 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:36:42,454 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77 [2024-06-27 19:36:42,454 INFO L420 AbstractCegarLoop]: === Iteration 79 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:36:42,454 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:36:42,454 INFO L85 PathProgramCache]: Analyzing trace with hash -1769068628, now seen corresponding path program 2 times [2024-06-27 19:36:42,454 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:36:42,455 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [29640092] [2024-06-27 19:36:42,455 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:36:42,455 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:36:42,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:36:43,570 INFO 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 19:36:43,570 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:36:43,570 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [29640092] [2024-06-27 19:36:43,570 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [29640092] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:36:43,570 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:36:43,570 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 19:36:43,570 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [856053833] [2024-06-27 19:36:43,571 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:36:43,571 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 19:36:43,571 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:36:43,571 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 19:36:43,571 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-27 19:36:43,629 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 43 [2024-06-27 19:36:43,629 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 285 places, 370 transitions, 4974 flow. Second operand has 9 states, 9 states have (on average 8.777777777777779) internal successors, (79), 9 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:36:43,629 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:36:43,629 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 43 [2024-06-27 19:36:43,629 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:36:45,307 INFO L124 PetriNetUnfolderBase]: 5151/7783 cut-off events. [2024-06-27 19:36:45,307 INFO L125 PetriNetUnfolderBase]: For 775342/775351 co-relation queries the response was YES. [2024-06-27 19:36:45,379 INFO L83 FinitePrefix]: Finished finitePrefix Result has 64225 conditions, 7783 events. 5151/7783 cut-off events. For 775342/775351 co-relation queries the response was YES. Maximal size of possible extension queue 342. Compared 43473 event pairs, 1355 based on Foata normal form. 12/7790 useless extension candidates. Maximal degree in co-relation 64091. Up to 7069 conditions per place. [2024-06-27 19:36:45,410 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 319 selfloop transitions, 87 changer transitions 0/409 dead transitions. [2024-06-27 19:36:45,411 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 292 places, 409 transitions, 6472 flow [2024-06-27 19:36:45,411 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:36:45,411 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:36:45,411 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 137 transitions. [2024-06-27 19:36:45,411 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39825581395348836 [2024-06-27 19:36:45,412 INFO L175 Difference]: Start difference. First operand has 285 places, 370 transitions, 4974 flow. Second operand 8 states and 137 transitions. [2024-06-27 19:36:45,412 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 292 places, 409 transitions, 6472 flow [2024-06-27 19:36:47,057 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 287 places, 409 transitions, 6364 flow, removed 39 selfloop flow, removed 5 redundant places. [2024-06-27 19:36:47,062 INFO L231 Difference]: Finished difference. Result has 289 places, 381 transitions, 5351 flow [2024-06-27 19:36:47,062 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=4866, PETRI_DIFFERENCE_MINUEND_PLACES=280, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=370, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=80, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=289, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5351, PETRI_PLACES=289, PETRI_TRANSITIONS=381} [2024-06-27 19:36:47,062 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 245 predicate places. [2024-06-27 19:36:47,062 INFO L495 AbstractCegarLoop]: Abstraction has has 289 places, 381 transitions, 5351 flow [2024-06-27 19:36:47,063 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.777777777777779) internal successors, (79), 9 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:36:47,063 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:36:47,063 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:36:47,063 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78 [2024-06-27 19:36:47,063 INFO L420 AbstractCegarLoop]: === Iteration 80 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:36:47,063 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:36:47,063 INFO L85 PathProgramCache]: Analyzing trace with hash 1806081997, now seen corresponding path program 1 times [2024-06-27 19:36:47,063 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:36:47,064 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [261333674] [2024-06-27 19:36:47,064 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:36:47,064 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:36:47,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:36:47,916 INFO 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 19:36:47,916 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:36:47,916 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [261333674] [2024-06-27 19:36:47,916 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [261333674] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:36:47,916 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:36:47,916 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 19:36:47,916 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [537322223] [2024-06-27 19:36:47,916 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:36:47,916 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 19:36:47,916 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:36:47,917 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 19:36:47,917 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-27 19:36:47,993 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 43 [2024-06-27 19:36:47,993 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 289 places, 381 transitions, 5351 flow. Second operand has 9 states, 9 states have (on average 8.777777777777779) internal successors, (79), 9 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:36:47,993 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:36:47,993 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 43 [2024-06-27 19:36:47,993 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:36:49,704 INFO L124 PetriNetUnfolderBase]: 5170/7810 cut-off events. [2024-06-27 19:36:49,705 INFO L125 PetriNetUnfolderBase]: For 797917/797926 co-relation queries the response was YES. [2024-06-27 19:36:49,777 INFO L83 FinitePrefix]: Finished finitePrefix Result has 65703 conditions, 7810 events. 5170/7810 cut-off events. For 797917/797926 co-relation queries the response was YES. Maximal size of possible extension queue 345. Compared 43632 event pairs, 1505 based on Foata normal form. 11/7816 useless extension candidates. Maximal degree in co-relation 65567. Up to 7421 conditions per place. [2024-06-27 19:36:49,811 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 328 selfloop transitions, 76 changer transitions 0/407 dead transitions. [2024-06-27 19:36:49,811 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 296 places, 407 transitions, 6494 flow [2024-06-27 19:36:49,812 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:36:49,812 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:36:49,812 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 130 transitions. [2024-06-27 19:36:49,812 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37790697674418605 [2024-06-27 19:36:49,812 INFO L175 Difference]: Start difference. First operand has 289 places, 381 transitions, 5351 flow. Second operand 8 states and 130 transitions. [2024-06-27 19:36:49,813 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 296 places, 407 transitions, 6494 flow [2024-06-27 19:36:51,242 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 293 places, 407 transitions, 6341 flow, removed 54 selfloop flow, removed 3 redundant places. [2024-06-27 19:36:51,247 INFO L231 Difference]: Finished difference. Result has 294 places, 384 transitions, 5420 flow [2024-06-27 19:36:51,247 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=5198, PETRI_DIFFERENCE_MINUEND_PLACES=286, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=381, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=73, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=305, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5420, PETRI_PLACES=294, PETRI_TRANSITIONS=384} [2024-06-27 19:36:51,248 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 250 predicate places. [2024-06-27 19:36:51,248 INFO L495 AbstractCegarLoop]: Abstraction has has 294 places, 384 transitions, 5420 flow [2024-06-27 19:36:51,248 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.777777777777779) internal successors, (79), 9 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:36:51,248 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:36:51,248 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:36:51,248 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79 [2024-06-27 19:36:51,248 INFO L420 AbstractCegarLoop]: === Iteration 81 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:36:51,249 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:36:51,249 INFO L85 PathProgramCache]: Analyzing trace with hash 1806076200, now seen corresponding path program 3 times [2024-06-27 19:36:51,249 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:36:51,249 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1163718439] [2024-06-27 19:36:51,249 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:36:51,249 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:36:51,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:36:52,411 INFO 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 19:36:52,411 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:36:52,411 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1163718439] [2024-06-27 19:36:52,411 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1163718439] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:36:52,411 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:36:52,411 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 19:36:52,412 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2127304842] [2024-06-27 19:36:52,412 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:36:52,412 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 19:36:52,412 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:36:52,412 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 19:36:52,412 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-27 19:36:52,467 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 43 [2024-06-27 19:36:52,467 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 294 places, 384 transitions, 5420 flow. Second operand has 10 states, 10 states have (on average 8.6) internal successors, (86), 10 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:36:52,467 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:36:52,467 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 43 [2024-06-27 19:36:52,467 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:36:54,224 INFO L124 PetriNetUnfolderBase]: 5154/7786 cut-off events. [2024-06-27 19:36:54,224 INFO L125 PetriNetUnfolderBase]: For 798819/798819 co-relation queries the response was YES. [2024-06-27 19:36:54,293 INFO L83 FinitePrefix]: Finished finitePrefix Result has 65378 conditions, 7786 events. 5154/7786 cut-off events. For 798819/798819 co-relation queries the response was YES. Maximal size of possible extension queue 343. Compared 43405 event pairs, 1549 based on Foata normal form. 4/7788 useless extension candidates. Maximal degree in co-relation 65240. Up to 7684 conditions per place. [2024-06-27 19:36:54,323 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 369 selfloop transitions, 34 changer transitions 0/406 dead transitions. [2024-06-27 19:36:54,323 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 302 places, 406 transitions, 6353 flow [2024-06-27 19:36:54,323 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 19:36:54,324 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 19:36:54,324 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 131 transitions. [2024-06-27 19:36:54,324 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3385012919896641 [2024-06-27 19:36:54,324 INFO L175 Difference]: Start difference. First operand has 294 places, 384 transitions, 5420 flow. Second operand 9 states and 131 transitions. [2024-06-27 19:36:54,324 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 302 places, 406 transitions, 6353 flow [2024-06-27 19:36:56,377 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 297 places, 406 transitions, 6155 flow, removed 46 selfloop flow, removed 5 redundant places. [2024-06-27 19:36:56,382 INFO L231 Difference]: Finished difference. Result has 299 places, 388 transitions, 5376 flow [2024-06-27 19:36:56,382 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=5222, PETRI_DIFFERENCE_MINUEND_PLACES=289, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=384, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=351, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5376, PETRI_PLACES=299, PETRI_TRANSITIONS=388} [2024-06-27 19:36:56,383 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 255 predicate places. [2024-06-27 19:36:56,383 INFO L495 AbstractCegarLoop]: Abstraction has has 299 places, 388 transitions, 5376 flow [2024-06-27 19:36:56,383 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.6) internal successors, (86), 10 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:36:56,383 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:36:56,383 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:36:56,383 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80 [2024-06-27 19:36:56,383 INFO L420 AbstractCegarLoop]: === Iteration 82 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:36:56,384 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:36:56,384 INFO L85 PathProgramCache]: Analyzing trace with hash 1950182056, now seen corresponding path program 1 times [2024-06-27 19:36:56,384 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:36:56,384 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [831262044] [2024-06-27 19:36:56,384 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:36:56,384 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:36:56,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:36:57,197 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:36:57,197 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:36:57,197 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [831262044] [2024-06-27 19:36:57,197 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [831262044] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:36:57,197 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:36:57,197 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 19:36:57,197 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1085153105] [2024-06-27 19:36:57,198 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:36:57,198 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 19:36:57,198 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:36:57,198 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 19:36:57,198 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-27 19:36:57,237 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 43 [2024-06-27 19:36:57,237 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 299 places, 388 transitions, 5376 flow. Second operand has 10 states, 10 states have (on average 8.6) internal successors, (86), 10 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:36:57,237 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:36:57,237 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 43 [2024-06-27 19:36:57,237 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:36:58,980 INFO L124 PetriNetUnfolderBase]: 5167/7807 cut-off events. [2024-06-27 19:36:58,980 INFO L125 PetriNetUnfolderBase]: For 822799/822808 co-relation queries the response was YES. [2024-06-27 19:36:59,049 INFO L83 FinitePrefix]: Finished finitePrefix Result has 65236 conditions, 7807 events. 5167/7807 cut-off events. For 822799/822808 co-relation queries the response was YES. Maximal size of possible extension queue 344. Compared 43606 event pairs, 1495 based on Foata normal form. 13/7815 useless extension candidates. Maximal degree in co-relation 65096. Up to 7386 conditions per place. [2024-06-27 19:36:59,079 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 333 selfloop transitions, 83 changer transitions 0/419 dead transitions. [2024-06-27 19:36:59,079 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 307 places, 419 transitions, 6654 flow [2024-06-27 19:36:59,080 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 19:36:59,080 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 19:36:59,080 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 144 transitions. [2024-06-27 19:36:59,080 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37209302325581395 [2024-06-27 19:36:59,080 INFO L175 Difference]: Start difference. First operand has 299 places, 388 transitions, 5376 flow. Second operand 9 states and 144 transitions. [2024-06-27 19:36:59,080 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 307 places, 419 transitions, 6654 flow [2024-06-27 19:37:01,032 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 299 places, 419 transitions, 6426 flow, removed 46 selfloop flow, removed 8 redundant places. [2024-06-27 19:37:01,038 INFO L231 Difference]: Finished difference. Result has 300 places, 394 transitions, 5477 flow [2024-06-27 19:37:01,038 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=5148, PETRI_DIFFERENCE_MINUEND_PLACES=291, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=388, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=77, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=305, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5477, PETRI_PLACES=300, PETRI_TRANSITIONS=394} [2024-06-27 19:37:01,038 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 256 predicate places. [2024-06-27 19:37:01,038 INFO L495 AbstractCegarLoop]: Abstraction has has 300 places, 394 transitions, 5477 flow [2024-06-27 19:37:01,039 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.6) internal successors, (86), 10 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:37:01,039 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:37:01,039 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:37:01,039 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81 [2024-06-27 19:37:01,039 INFO L420 AbstractCegarLoop]: === Iteration 83 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:37:01,039 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:37:01,039 INFO L85 PathProgramCache]: Analyzing trace with hash 243125582, now seen corresponding path program 4 times [2024-06-27 19:37:01,039 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:37:01,040 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [903876168] [2024-06-27 19:37:01,040 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:37:01,040 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:37:01,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:37:02,067 INFO 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 19:37:02,067 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:37:02,067 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [903876168] [2024-06-27 19:37:02,067 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [903876168] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:37:02,067 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:37:02,067 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 19:37:02,068 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [787317889] [2024-06-27 19:37:02,068 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:37:02,068 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 19:37:02,068 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:37:02,068 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 19:37:02,068 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-27 19:37:02,126 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 43 [2024-06-27 19:37:02,127 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 300 places, 394 transitions, 5477 flow. Second operand has 9 states, 9 states have (on average 8.777777777777779) internal successors, (79), 9 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:37:02,127 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:37:02,127 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 43 [2024-06-27 19:37:02,127 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:37:03,829 INFO L124 PetriNetUnfolderBase]: 5177/7820 cut-off events. [2024-06-27 19:37:03,830 INFO L125 PetriNetUnfolderBase]: For 830162/830164 co-relation queries the response was YES. [2024-06-27 19:37:03,910 INFO L83 FinitePrefix]: Finished finitePrefix Result has 66020 conditions, 7820 events. 5177/7820 cut-off events. For 830162/830164 co-relation queries the response was YES. Maximal size of possible extension queue 345. Compared 43727 event pairs, 1571 based on Foata normal form. 4/7822 useless extension candidates. Maximal degree in co-relation 65882. Up to 7740 conditions per place. [2024-06-27 19:37:03,944 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 382 selfloop transitions, 31 changer transitions 0/416 dead transitions. [2024-06-27 19:37:03,944 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 308 places, 416 transitions, 6484 flow [2024-06-27 19:37:03,945 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 19:37:03,945 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 19:37:03,945 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 134 transitions. [2024-06-27 19:37:03,946 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3462532299741602 [2024-06-27 19:37:03,947 INFO L175 Difference]: Start difference. First operand has 300 places, 394 transitions, 5477 flow. Second operand 9 states and 134 transitions. [2024-06-27 19:37:03,947 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 308 places, 416 transitions, 6484 flow [2024-06-27 19:37:06,046 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 301 places, 416 transitions, 6189 flow, removed 68 selfloop flow, removed 7 redundant places. [2024-06-27 19:37:06,051 INFO L231 Difference]: Finished difference. Result has 302 places, 397 transitions, 5346 flow [2024-06-27 19:37:06,052 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=5184, PETRI_DIFFERENCE_MINUEND_PLACES=293, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=394, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=363, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5346, PETRI_PLACES=302, PETRI_TRANSITIONS=397} [2024-06-27 19:37:06,052 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 258 predicate places. [2024-06-27 19:37:06,052 INFO L495 AbstractCegarLoop]: Abstraction has has 302 places, 397 transitions, 5346 flow [2024-06-27 19:37:06,053 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.777777777777779) internal successors, (79), 9 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:37:06,053 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:37:06,053 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:37:06,053 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82 [2024-06-27 19:37:06,053 INFO L420 AbstractCegarLoop]: === Iteration 84 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:37:06,053 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:37:06,053 INFO L85 PathProgramCache]: Analyzing trace with hash 1694449244, now seen corresponding path program 5 times [2024-06-27 19:37:06,053 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:37:06,054 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [237585285] [2024-06-27 19:37:06,054 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:37:06,054 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:37:06,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:37:07,077 INFO 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 19:37:07,077 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:37:07,077 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [237585285] [2024-06-27 19:37:07,077 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [237585285] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:37:07,078 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:37:07,078 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 19:37:07,078 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1121838064] [2024-06-27 19:37:07,078 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:37:07,078 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 19:37:07,078 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:37:07,079 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 19:37:07,079 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-27 19:37:07,151 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 43 [2024-06-27 19:37:07,152 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 302 places, 397 transitions, 5346 flow. Second operand has 9 states, 9 states have (on average 8.777777777777779) internal successors, (79), 9 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:37:07,152 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:37:07,152 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 43 [2024-06-27 19:37:07,152 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:37:08,907 INFO L124 PetriNetUnfolderBase]: 5181/7826 cut-off events. [2024-06-27 19:37:08,908 INFO L125 PetriNetUnfolderBase]: For 846802/846804 co-relation queries the response was YES. [2024-06-27 19:37:08,985 INFO L83 FinitePrefix]: Finished finitePrefix Result has 66025 conditions, 7826 events. 5181/7826 cut-off events. For 846802/846804 co-relation queries the response was YES. Maximal size of possible extension queue 345. Compared 43847 event pairs, 1579 based on Foata normal form. 4/7828 useless extension candidates. Maximal degree in co-relation 65886. Up to 7709 conditions per place. [2024-06-27 19:37:09,020 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 374 selfloop transitions, 48 changer transitions 0/425 dead transitions. [2024-06-27 19:37:09,021 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 311 places, 425 transitions, 6406 flow [2024-06-27 19:37:09,021 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 19:37:09,021 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 19:37:09,021 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 149 transitions. [2024-06-27 19:37:09,021 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.34651162790697676 [2024-06-27 19:37:09,022 INFO L175 Difference]: Start difference. First operand has 302 places, 397 transitions, 5346 flow. Second operand 10 states and 149 transitions. [2024-06-27 19:37:09,022 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 311 places, 425 transitions, 6406 flow [2024-06-27 19:37:10,480 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 303 places, 425 transitions, 6161 flow, removed 44 selfloop flow, removed 8 redundant places. [2024-06-27 19:37:10,485 INFO L231 Difference]: Finished difference. Result has 305 places, 403 transitions, 5343 flow [2024-06-27 19:37:10,486 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=5102, PETRI_DIFFERENCE_MINUEND_PLACES=294, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=397, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=42, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=349, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=5343, PETRI_PLACES=305, PETRI_TRANSITIONS=403} [2024-06-27 19:37:10,486 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 261 predicate places. [2024-06-27 19:37:10,486 INFO L495 AbstractCegarLoop]: Abstraction has has 305 places, 403 transitions, 5343 flow [2024-06-27 19:37:10,486 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.777777777777779) internal successors, (79), 9 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:37:10,486 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:37:10,486 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:37:10,486 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83 [2024-06-27 19:37:10,487 INFO L420 AbstractCegarLoop]: === Iteration 85 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:37:10,487 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:37:10,487 INFO L85 PathProgramCache]: Analyzing trace with hash 509032608, now seen corresponding path program 2 times [2024-06-27 19:37:10,487 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:37:10,488 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [703299627] [2024-06-27 19:37:10,488 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:37:10,488 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:37:10,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:37:11,682 INFO 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 19:37:11,682 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:37:11,682 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [703299627] [2024-06-27 19:37:11,682 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [703299627] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:37:11,682 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:37:11,682 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 19:37:11,682 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [556089123] [2024-06-27 19:37:11,683 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:37:11,683 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 19:37:11,683 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:37:11,683 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 19:37:11,683 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-27 19:37:11,758 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 43 [2024-06-27 19:37:11,758 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 305 places, 403 transitions, 5343 flow. Second operand has 10 states, 10 states have (on average 8.6) internal successors, (86), 10 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:37:11,758 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:37:11,758 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 43 [2024-06-27 19:37:11,758 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:37:13,586 INFO L124 PetriNetUnfolderBase]: 5191/7840 cut-off events. [2024-06-27 19:37:13,586 INFO L125 PetriNetUnfolderBase]: For 866217/866219 co-relation queries the response was YES. [2024-06-27 19:37:13,663 INFO L83 FinitePrefix]: Finished finitePrefix Result has 66747 conditions, 7840 events. 5191/7840 cut-off events. For 866217/866219 co-relation queries the response was YES. Maximal size of possible extension queue 346. Compared 43877 event pairs, 1578 based on Foata normal form. 4/7842 useless extension candidates. Maximal degree in co-relation 66606. Up to 7633 conditions per place. [2024-06-27 19:37:13,697 INFO L140 encePairwiseOnDemand]: 30/43 looper letters, 350 selfloop transitions, 76 changer transitions 0/429 dead transitions. [2024-06-27 19:37:13,698 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 313 places, 429 transitions, 6554 flow [2024-06-27 19:37:13,698 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 19:37:13,698 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 19:37:13,698 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 140 transitions. [2024-06-27 19:37:13,699 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36175710594315247 [2024-06-27 19:37:13,699 INFO L175 Difference]: Start difference. First operand has 305 places, 403 transitions, 5343 flow. Second operand 9 states and 140 transitions. [2024-06-27 19:37:13,699 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 313 places, 429 transitions, 6554 flow [2024-06-27 19:37:15,720 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 306 places, 429 transitions, 6388 flow, removed 46 selfloop flow, removed 7 redundant places. [2024-06-27 19:37:15,726 INFO L231 Difference]: Finished difference. Result has 309 places, 408 transitions, 5458 flow [2024-06-27 19:37:15,726 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=5179, PETRI_DIFFERENCE_MINUEND_PLACES=298, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=403, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=71, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=330, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5458, PETRI_PLACES=309, PETRI_TRANSITIONS=408} [2024-06-27 19:37:15,727 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 265 predicate places. [2024-06-27 19:37:15,727 INFO L495 AbstractCegarLoop]: Abstraction has has 309 places, 408 transitions, 5458 flow [2024-06-27 19:37:15,727 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.6) internal successors, (86), 10 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:37:15,727 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:37:15,727 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:37:15,728 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84 [2024-06-27 19:37:15,728 INFO L420 AbstractCegarLoop]: === Iteration 86 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:37:15,728 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:37:15,728 INFO L85 PathProgramCache]: Analyzing trace with hash 509359038, now seen corresponding path program 3 times [2024-06-27 19:37:15,728 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:37:15,728 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [294521991] [2024-06-27 19:37:15,728 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:37:15,729 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:37:15,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:37:16,886 INFO 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 19:37:16,887 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:37:16,887 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [294521991] [2024-06-27 19:37:16,887 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [294521991] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:37:16,887 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:37:16,887 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 19:37:16,887 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1190433461] [2024-06-27 19:37:16,887 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:37:16,887 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 19:37:16,888 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:37:16,888 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 19:37:16,888 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-27 19:37:16,948 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 43 [2024-06-27 19:37:16,948 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 309 places, 408 transitions, 5458 flow. Second operand has 10 states, 10 states have (on average 8.6) internal successors, (86), 10 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:37:16,948 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:37:16,948 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 43 [2024-06-27 19:37:16,948 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:37:18,868 INFO L124 PetriNetUnfolderBase]: 5185/7832 cut-off events. [2024-06-27 19:37:18,868 INFO L125 PetriNetUnfolderBase]: For 856987/856989 co-relation queries the response was YES. [2024-06-27 19:37:18,939 INFO L83 FinitePrefix]: Finished finitePrefix Result has 66173 conditions, 7832 events. 5185/7832 cut-off events. For 856987/856989 co-relation queries the response was YES. Maximal size of possible extension queue 345. Compared 43798 event pairs, 1577 based on Foata normal form. 4/7834 useless extension candidates. Maximal degree in co-relation 66029. Up to 7628 conditions per place. [2024-06-27 19:37:18,971 INFO L140 encePairwiseOnDemand]: 30/43 looper letters, 352 selfloop transitions, 77 changer transitions 0/432 dead transitions. [2024-06-27 19:37:18,971 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 318 places, 432 transitions, 6602 flow [2024-06-27 19:37:18,972 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 19:37:18,972 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 19:37:18,972 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 154 transitions. [2024-06-27 19:37:18,973 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3581395348837209 [2024-06-27 19:37:18,973 INFO L175 Difference]: Start difference. First operand has 309 places, 408 transitions, 5458 flow. Second operand 10 states and 154 transitions. [2024-06-27 19:37:18,973 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 318 places, 432 transitions, 6602 flow [2024-06-27 19:37:21,240 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 314 places, 432 transitions, 6433 flow, removed 46 selfloop flow, removed 4 redundant places. [2024-06-27 19:37:21,245 INFO L231 Difference]: Finished difference. Result has 315 places, 408 transitions, 5453 flow [2024-06-27 19:37:21,245 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=5289, PETRI_DIFFERENCE_MINUEND_PLACES=305, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=408, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=77, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=331, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=5453, PETRI_PLACES=315, PETRI_TRANSITIONS=408} [2024-06-27 19:37:21,246 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 271 predicate places. [2024-06-27 19:37:21,246 INFO L495 AbstractCegarLoop]: Abstraction has has 315 places, 408 transitions, 5453 flow [2024-06-27 19:37:21,246 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.6) internal successors, (86), 10 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:37:21,246 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:37:21,246 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:37:21,246 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85 [2024-06-27 19:37:21,246 INFO L420 AbstractCegarLoop]: === Iteration 87 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:37:21,247 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:37:21,247 INFO L85 PathProgramCache]: Analyzing trace with hash 231420009, now seen corresponding path program 1 times [2024-06-27 19:37:21,247 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:37:21,247 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2036871027] [2024-06-27 19:37:21,247 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:37:21,247 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:37:21,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:37:21,956 INFO 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 19:37:21,956 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:37:21,957 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2036871027] [2024-06-27 19:37:21,957 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2036871027] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:37:21,957 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:37:21,957 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 19:37:21,957 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1861025603] [2024-06-27 19:37:21,957 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:37:21,957 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 19:37:21,957 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:37:21,957 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 19:37:21,957 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-27 19:37:22,046 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 43 [2024-06-27 19:37:22,046 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 315 places, 408 transitions, 5453 flow. Second operand has 10 states, 10 states have (on average 8.6) internal successors, (86), 10 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:37:22,046 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:37:22,046 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 43 [2024-06-27 19:37:22,046 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:37:23,951 INFO L124 PetriNetUnfolderBase]: 5227/7890 cut-off events. [2024-06-27 19:37:23,951 INFO L125 PetriNetUnfolderBase]: For 882970/882974 co-relation queries the response was YES. [2024-06-27 19:37:24,027 INFO L83 FinitePrefix]: Finished finitePrefix Result has 66782 conditions, 7890 events. 5227/7890 cut-off events. For 882970/882974 co-relation queries the response was YES. Maximal size of possible extension queue 348. Compared 44119 event pairs, 1260 based on Foata normal form. 8/7896 useless extension candidates. Maximal degree in co-relation 66637. Up to 7690 conditions per place. [2024-06-27 19:37:24,065 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 408 selfloop transitions, 34 changer transitions 0/445 dead transitions. [2024-06-27 19:37:24,065 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 322 places, 445 transitions, 6560 flow [2024-06-27 19:37:24,066 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:37:24,066 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:37:24,067 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 132 transitions. [2024-06-27 19:37:24,067 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38372093023255816 [2024-06-27 19:37:24,067 INFO L175 Difference]: Start difference. First operand has 315 places, 408 transitions, 5453 flow. Second operand 8 states and 132 transitions. [2024-06-27 19:37:24,067 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 322 places, 445 transitions, 6560 flow [2024-06-27 19:37:26,080 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 313 places, 445 transitions, 6383 flow, removed 12 selfloop flow, removed 9 redundant places. [2024-06-27 19:37:26,086 INFO L231 Difference]: Finished difference. Result has 315 places, 417 transitions, 5493 flow [2024-06-27 19:37:26,086 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=5276, PETRI_DIFFERENCE_MINUEND_PLACES=306, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=408, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=374, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5493, PETRI_PLACES=315, PETRI_TRANSITIONS=417} [2024-06-27 19:37:26,086 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 271 predicate places. [2024-06-27 19:37:26,086 INFO L495 AbstractCegarLoop]: Abstraction has has 315 places, 417 transitions, 5493 flow [2024-06-27 19:37:26,087 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.6) internal successors, (86), 10 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:37:26,087 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:37:26,087 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:37:26,087 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86 [2024-06-27 19:37:26,087 INFO L420 AbstractCegarLoop]: === Iteration 88 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:37:26,087 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:37:26,088 INFO L85 PathProgramCache]: Analyzing trace with hash 1662172657, now seen corresponding path program 2 times [2024-06-27 19:37:26,088 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:37:26,088 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1622850243] [2024-06-27 19:37:26,088 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:37:26,088 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:37:26,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:37:26,921 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:37:26,921 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:37:26,921 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1622850243] [2024-06-27 19:37:26,921 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1622850243] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:37:26,922 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:37:26,922 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 19:37:26,922 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [299122422] [2024-06-27 19:37:26,922 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:37:26,922 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 19:37:26,922 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:37:26,923 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 19:37:26,923 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-27 19:37:26,983 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 43 [2024-06-27 19:37:26,983 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 315 places, 417 transitions, 5493 flow. Second operand has 10 states, 10 states have (on average 8.6) internal successors, (86), 10 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:37:26,984 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:37:26,984 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 43 [2024-06-27 19:37:26,984 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:37:28,856 INFO L124 PetriNetUnfolderBase]: 5257/7932 cut-off events. [2024-06-27 19:37:28,856 INFO L125 PetriNetUnfolderBase]: For 883463/883467 co-relation queries the response was YES. [2024-06-27 19:37:28,932 INFO L83 FinitePrefix]: Finished finitePrefix Result has 68184 conditions, 7932 events. 5257/7932 cut-off events. For 883463/883467 co-relation queries the response was YES. Maximal size of possible extension queue 351. Compared 44275 event pairs, 1260 based on Foata normal form. 8/7938 useless extension candidates. Maximal degree in co-relation 68038. Up to 7700 conditions per place. [2024-06-27 19:37:28,966 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 411 selfloop transitions, 40 changer transitions 0/454 dead transitions. [2024-06-27 19:37:28,967 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 323 places, 454 transitions, 6629 flow [2024-06-27 19:37:28,967 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 19:37:28,967 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 19:37:28,968 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 146 transitions. [2024-06-27 19:37:28,968 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3772609819121447 [2024-06-27 19:37:28,968 INFO L175 Difference]: Start difference. First operand has 315 places, 417 transitions, 5493 flow. Second operand 9 states and 146 transitions. [2024-06-27 19:37:28,968 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 323 places, 454 transitions, 6629 flow [2024-06-27 19:37:31,423 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 318 places, 454 transitions, 6511 flow, removed 32 selfloop flow, removed 5 redundant places. [2024-06-27 19:37:31,429 INFO L231 Difference]: Finished difference. Result has 320 places, 423 transitions, 5584 flow [2024-06-27 19:37:31,429 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=5375, PETRI_DIFFERENCE_MINUEND_PLACES=310, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=417, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=377, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5584, PETRI_PLACES=320, PETRI_TRANSITIONS=423} [2024-06-27 19:37:31,429 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 276 predicate places. [2024-06-27 19:37:31,429 INFO L495 AbstractCegarLoop]: Abstraction has has 320 places, 423 transitions, 5584 flow [2024-06-27 19:37:31,430 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.6) internal successors, (86), 10 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:37:31,430 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:37:31,430 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:37:31,430 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable87 [2024-06-27 19:37:31,430 INFO L420 AbstractCegarLoop]: === Iteration 89 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:37:31,430 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:37:31,431 INFO L85 PathProgramCache]: Analyzing trace with hash 1663952733, now seen corresponding path program 3 times [2024-06-27 19:37:31,431 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:37:31,431 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [432848818] [2024-06-27 19:37:31,431 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:37:31,431 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:37:31,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:37:32,154 INFO 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 19:37:32,154 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:37:32,154 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [432848818] [2024-06-27 19:37:32,154 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [432848818] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:37:32,154 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:37:32,154 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 19:37:32,154 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [385233021] [2024-06-27 19:37:32,155 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:37:32,155 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 19:37:32,155 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:37:32,155 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 19:37:32,155 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-27 19:37:32,216 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 43 [2024-06-27 19:37:32,216 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 320 places, 423 transitions, 5584 flow. Second operand has 10 states, 10 states have (on average 8.6) internal successors, (86), 10 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:37:32,216 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:37:32,216 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 43 [2024-06-27 19:37:32,216 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:37:34,020 INFO L124 PetriNetUnfolderBase]: 5277/7962 cut-off events. [2024-06-27 19:37:34,020 INFO L125 PetriNetUnfolderBase]: For 906283/906285 co-relation queries the response was YES. [2024-06-27 19:37:34,104 INFO L83 FinitePrefix]: Finished finitePrefix Result has 69025 conditions, 7962 events. 5277/7962 cut-off events. For 906283/906285 co-relation queries the response was YES. Maximal size of possible extension queue 355. Compared 44485 event pairs, 1226 based on Foata normal form. 4/7964 useless extension candidates. Maximal degree in co-relation 68877. Up to 7456 conditions per place. [2024-06-27 19:37:34,138 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 391 selfloop transitions, 61 changer transitions 0/455 dead transitions. [2024-06-27 19:37:34,139 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 327 places, 455 transitions, 6702 flow [2024-06-27 19:37:34,139 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:37:34,139 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:37:34,139 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 139 transitions. [2024-06-27 19:37:34,140 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40406976744186046 [2024-06-27 19:37:34,140 INFO L175 Difference]: Start difference. First operand has 320 places, 423 transitions, 5584 flow. Second operand 8 states and 139 transitions. [2024-06-27 19:37:34,140 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 327 places, 455 transitions, 6702 flow [2024-06-27 19:37:36,648 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 321 places, 455 transitions, 6567 flow, removed 35 selfloop flow, removed 6 redundant places. [2024-06-27 19:37:36,653 INFO L231 Difference]: Finished difference. Result has 322 places, 426 transitions, 5655 flow [2024-06-27 19:37:36,654 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=5449, PETRI_DIFFERENCE_MINUEND_PLACES=314, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=423, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=58, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=362, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5655, PETRI_PLACES=322, PETRI_TRANSITIONS=426} [2024-06-27 19:37:36,654 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 278 predicate places. [2024-06-27 19:37:36,654 INFO L495 AbstractCegarLoop]: Abstraction has has 322 places, 426 transitions, 5655 flow [2024-06-27 19:37:36,654 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.6) internal successors, (86), 10 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:37:36,654 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:37:36,654 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:37:36,654 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable88 [2024-06-27 19:37:36,654 INFO L420 AbstractCegarLoop]: === Iteration 90 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:37:36,655 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:37:36,655 INFO L85 PathProgramCache]: Analyzing trace with hash 1664726125, now seen corresponding path program 1 times [2024-06-27 19:37:36,655 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:37:36,655 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [910839530] [2024-06-27 19:37:36,655 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:37:36,655 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:37:36,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:37:37,730 INFO 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 19:37:37,730 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:37:37,730 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [910839530] [2024-06-27 19:37:37,730 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [910839530] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:37:37,730 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:37:37,730 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 19:37:37,730 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [36227809] [2024-06-27 19:37:37,731 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:37:37,731 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 19:37:37,731 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:37:37,731 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 19:37:37,731 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-27 19:37:37,792 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 43 [2024-06-27 19:37:37,793 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 322 places, 426 transitions, 5655 flow. Second operand has 10 states, 10 states have (on average 8.6) internal successors, (86), 10 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:37:37,793 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:37:37,793 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 43 [2024-06-27 19:37:37,793 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:37:39,825 INFO L124 PetriNetUnfolderBase]: 5282/7968 cut-off events. [2024-06-27 19:37:39,825 INFO L125 PetriNetUnfolderBase]: For 919048/919054 co-relation queries the response was YES. [2024-06-27 19:37:39,896 INFO L83 FinitePrefix]: Finished finitePrefix Result has 69828 conditions, 7968 events. 5282/7968 cut-off events. For 919048/919054 co-relation queries the response was YES. Maximal size of possible extension queue 355. Compared 44608 event pairs, 1450 based on Foata normal form. 5/7971 useless extension candidates. Maximal degree in co-relation 69679. Up to 7739 conditions per place. [2024-06-27 19:37:39,933 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 397 selfloop transitions, 50 changer transitions 0/450 dead transitions. [2024-06-27 19:37:39,933 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 328 places, 450 transitions, 6747 flow [2024-06-27 19:37:39,934 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 19:37:39,934 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 19:37:39,935 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 119 transitions. [2024-06-27 19:37:39,935 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3953488372093023 [2024-06-27 19:37:39,935 INFO L175 Difference]: Start difference. First operand has 322 places, 426 transitions, 5655 flow. Second operand 7 states and 119 transitions. [2024-06-27 19:37:39,935 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 328 places, 450 transitions, 6747 flow [2024-06-27 19:37:42,616 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 322 places, 450 transitions, 6563 flow, removed 33 selfloop flow, removed 6 redundant places. [2024-06-27 19:37:42,622 INFO L231 Difference]: Finished difference. Result has 323 places, 429 transitions, 5695 flow [2024-06-27 19:37:42,622 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=5471, PETRI_DIFFERENCE_MINUEND_PLACES=316, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=426, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=47, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=376, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=5695, PETRI_PLACES=323, PETRI_TRANSITIONS=429} [2024-06-27 19:37:42,622 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 279 predicate places. [2024-06-27 19:37:42,623 INFO L495 AbstractCegarLoop]: Abstraction has has 323 places, 429 transitions, 5695 flow [2024-06-27 19:37:42,623 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.6) internal successors, (86), 10 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:37:42,623 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:37:42,623 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:37:42,623 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable89 [2024-06-27 19:37:42,623 INFO L420 AbstractCegarLoop]: === Iteration 91 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:37:42,624 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:37:42,624 INFO L85 PathProgramCache]: Analyzing trace with hash -1941624877, now seen corresponding path program 4 times [2024-06-27 19:37:42,624 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:37:42,624 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [219528095] [2024-06-27 19:37:42,624 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:37:42,624 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:37:42,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:37:43,317 INFO 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 19:37:43,317 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:37:43,317 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [219528095] [2024-06-27 19:37:43,318 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [219528095] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:37:43,318 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:37:43,318 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 19:37:43,318 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1935515580] [2024-06-27 19:37:43,318 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:37:43,318 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 19:37:43,318 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:37:43,319 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 19:37:43,319 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-06-27 19:37:43,415 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 43 [2024-06-27 19:37:43,415 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 323 places, 429 transitions, 5695 flow. Second operand has 10 states, 10 states have (on average 8.6) internal successors, (86), 10 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:37:43,415 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:37:43,415 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 43 [2024-06-27 19:37:43,415 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:37:45,279 INFO L124 PetriNetUnfolderBase]: 5350/8073 cut-off events. [2024-06-27 19:37:45,279 INFO L125 PetriNetUnfolderBase]: For 958064/958066 co-relation queries the response was YES. [2024-06-27 19:37:45,356 INFO L83 FinitePrefix]: Finished finitePrefix Result has 70704 conditions, 8073 events. 5350/8073 cut-off events. For 958064/958066 co-relation queries the response was YES. Maximal size of possible extension queue 364. Compared 45327 event pairs, 1249 based on Foata normal form. 4/8075 useless extension candidates. Maximal degree in co-relation 70554. Up to 7479 conditions per place. [2024-06-27 19:37:45,389 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 383 selfloop transitions, 90 changer transitions 0/476 dead transitions. [2024-06-27 19:37:45,389 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 330 places, 476 transitions, 7207 flow [2024-06-27 19:37:45,390 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:37:45,390 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:37:45,565 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 142 transitions. [2024-06-27 19:37:45,565 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4127906976744186 [2024-06-27 19:37:45,565 INFO L175 Difference]: Start difference. First operand has 323 places, 429 transitions, 5695 flow. Second operand 8 states and 142 transitions. [2024-06-27 19:37:45,565 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 330 places, 476 transitions, 7207 flow [2024-06-27 19:37:48,106 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 325 places, 476 transitions, 7069 flow, removed 27 selfloop flow, removed 5 redundant places. [2024-06-27 19:37:48,111 INFO L231 Difference]: Finished difference. Result has 329 places, 449 transitions, 6122 flow [2024-06-27 19:37:48,112 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=5561, PETRI_DIFFERENCE_MINUEND_PLACES=318, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=429, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=73, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=352, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6122, PETRI_PLACES=329, PETRI_TRANSITIONS=449} [2024-06-27 19:37:48,112 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 285 predicate places. [2024-06-27 19:37:48,112 INFO L495 AbstractCegarLoop]: Abstraction has has 329 places, 449 transitions, 6122 flow [2024-06-27 19:37:48,112 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.6) internal successors, (86), 10 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:37:48,112 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:37:48,112 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:37:48,112 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90 [2024-06-27 19:37:48,113 INFO L420 AbstractCegarLoop]: === Iteration 92 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:37:48,113 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:37:48,113 INFO L85 PathProgramCache]: Analyzing trace with hash -1734976087, now seen corresponding path program 5 times [2024-06-27 19:37:48,113 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:37:48,113 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [361384199] [2024-06-27 19:37:48,113 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:37:48,114 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:37:48,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:37:48,913 INFO 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 19:37:48,913 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:37:48,913 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [361384199] [2024-06-27 19:37:48,913 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [361384199] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:37:48,913 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:37:48,914 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 19:37:48,914 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [8321739] [2024-06-27 19:37:48,914 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:37:48,914 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 19:37:48,914 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:37:48,914 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 19:37:48,914 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-27 19:37:48,981 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 43 [2024-06-27 19:37:48,982 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 329 places, 449 transitions, 6122 flow. Second operand has 10 states, 10 states have (on average 8.6) internal successors, (86), 10 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:37:48,982 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:37:48,982 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 43 [2024-06-27 19:37:48,982 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:37:50,933 INFO L124 PetriNetUnfolderBase]: 5370/8092 cut-off events. [2024-06-27 19:37:50,933 INFO L125 PetriNetUnfolderBase]: For 946466/946466 co-relation queries the response was YES. [2024-06-27 19:37:51,014 INFO L83 FinitePrefix]: Finished finitePrefix Result has 72285 conditions, 8092 events. 5370/8092 cut-off events. For 946466/946466 co-relation queries the response was YES. Maximal size of possible extension queue 366. Compared 45282 event pairs, 1247 based on Foata normal form. 4/8094 useless extension candidates. Maximal degree in co-relation 72131. Up to 7882 conditions per place. [2024-06-27 19:37:51,046 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 424 selfloop transitions, 46 changer transitions 0/473 dead transitions. [2024-06-27 19:37:51,046 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 336 places, 473 transitions, 7238 flow [2024-06-27 19:37:51,047 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:37:51,047 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:37:51,047 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 127 transitions. [2024-06-27 19:37:51,048 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3691860465116279 [2024-06-27 19:37:51,048 INFO L175 Difference]: Start difference. First operand has 329 places, 449 transitions, 6122 flow. Second operand 8 states and 127 transitions. [2024-06-27 19:37:51,048 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 336 places, 473 transitions, 7238 flow [2024-06-27 19:37:53,765 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 335 places, 473 transitions, 7134 flow, removed 51 selfloop flow, removed 1 redundant places. [2024-06-27 19:37:53,770 INFO L231 Difference]: Finished difference. Result has 336 places, 452 transitions, 6208 flow [2024-06-27 19:37:53,771 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=6018, PETRI_DIFFERENCE_MINUEND_PLACES=328, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=449, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=403, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6208, PETRI_PLACES=336, PETRI_TRANSITIONS=452} [2024-06-27 19:37:53,771 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 292 predicate places. [2024-06-27 19:37:53,771 INFO L495 AbstractCegarLoop]: Abstraction has has 336 places, 452 transitions, 6208 flow [2024-06-27 19:37:53,771 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.6) internal successors, (86), 10 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:37:53,771 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:37:53,771 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:37:53,771 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91 [2024-06-27 19:37:53,772 INFO L420 AbstractCegarLoop]: === Iteration 93 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:37:53,772 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:37:53,772 INFO L85 PathProgramCache]: Analyzing trace with hash -341969887, now seen corresponding path program 6 times [2024-06-27 19:37:53,772 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:37:53,772 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1794435835] [2024-06-27 19:37:53,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:37:53,773 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:37:53,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:37:54,477 INFO 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 19:37:54,477 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:37:54,477 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1794435835] [2024-06-27 19:37:54,477 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1794435835] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:37:54,477 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:37:54,477 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 19:37:54,478 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1718239251] [2024-06-27 19:37:54,478 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:37:54,478 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 19:37:54,478 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:37:54,478 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 19:37:54,478 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-06-27 19:37:54,537 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 43 [2024-06-27 19:37:54,537 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 336 places, 452 transitions, 6208 flow. Second operand has 10 states, 10 states have (on average 8.6) internal successors, (86), 10 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:37:54,537 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:37:54,537 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 43 [2024-06-27 19:37:54,537 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:37:56,629 INFO L124 PetriNetUnfolderBase]: 5422/8172 cut-off events. [2024-06-27 19:37:56,630 INFO L125 PetriNetUnfolderBase]: For 986825/986827 co-relation queries the response was YES. [2024-06-27 19:37:56,699 INFO L83 FinitePrefix]: Finished finitePrefix Result has 73983 conditions, 8172 events. 5422/8172 cut-off events. For 986825/986827 co-relation queries the response was YES. Maximal size of possible extension queue 376. Compared 45922 event pairs, 1254 based on Foata normal form. 4/8174 useless extension candidates. Maximal degree in co-relation 73826. Up to 7382 conditions per place. [2024-06-27 19:37:56,730 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 360 selfloop transitions, 121 changer transitions 0/484 dead transitions. [2024-06-27 19:37:56,730 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 343 places, 484 transitions, 7660 flow [2024-06-27 19:37:56,731 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:37:56,731 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:37:56,731 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 141 transitions. [2024-06-27 19:37:56,731 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40988372093023256 [2024-06-27 19:37:56,731 INFO L175 Difference]: Start difference. First operand has 336 places, 452 transitions, 6208 flow. Second operand 8 states and 141 transitions. [2024-06-27 19:37:56,731 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 343 places, 484 transitions, 7660 flow [2024-06-27 19:37:58,813 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 337 places, 484 transitions, 7443 flow, removed 62 selfloop flow, removed 6 redundant places. [2024-06-27 19:37:58,827 INFO L231 Difference]: Finished difference. Result has 338 places, 458 transitions, 6438 flow [2024-06-27 19:37:58,827 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=6003, PETRI_DIFFERENCE_MINUEND_PLACES=330, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=452, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=118, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=334, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6438, PETRI_PLACES=338, PETRI_TRANSITIONS=458} [2024-06-27 19:37:58,828 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 294 predicate places. [2024-06-27 19:37:58,828 INFO L495 AbstractCegarLoop]: Abstraction has has 338 places, 458 transitions, 6438 flow [2024-06-27 19:37:58,828 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.6) internal successors, (86), 10 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:37:58,828 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:37:58,828 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:37:58,828 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92 [2024-06-27 19:37:58,829 INFO L420 AbstractCegarLoop]: === Iteration 94 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:37:58,829 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:37:58,829 INFO L85 PathProgramCache]: Analyzing trace with hash -2060104273, now seen corresponding path program 1 times [2024-06-27 19:37:58,829 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:37:58,829 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [513993986] [2024-06-27 19:37:58,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:37:58,829 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:37:58,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:37:59,878 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:37:59,878 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:37:59,878 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [513993986] [2024-06-27 19:37:59,878 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [513993986] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:37:59,878 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:37:59,878 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 19:37:59,878 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [40587032] [2024-06-27 19:37:59,878 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:37:59,878 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 19:37:59,878 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:37:59,879 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 19:37:59,879 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2024-06-27 19:37:59,995 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 43 [2024-06-27 19:37:59,996 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 338 places, 458 transitions, 6438 flow. Second operand has 11 states, 11 states have (on average 8.545454545454545) internal successors, (94), 11 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 19:37:59,996 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:37:59,996 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 43 [2024-06-27 19:37:59,996 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:38:02,073 INFO L124 PetriNetUnfolderBase]: 5430/8175 cut-off events. [2024-06-27 19:38:02,074 INFO L125 PetriNetUnfolderBase]: For 1001767/1001771 co-relation queries the response was YES. [2024-06-27 19:38:02,145 INFO L83 FinitePrefix]: Finished finitePrefix Result has 74395 conditions, 8175 events. 5430/8175 cut-off events. For 1001767/1001771 co-relation queries the response was YES. Maximal size of possible extension queue 378. Compared 45709 event pairs, 1115 based on Foata normal form. 6/8179 useless extension candidates. Maximal degree in co-relation 74238. Up to 7991 conditions per place. [2024-06-27 19:38:02,175 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 456 selfloop transitions, 29 changer transitions 0/488 dead transitions. [2024-06-27 19:38:02,175 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 345 places, 488 transitions, 7554 flow [2024-06-27 19:38:02,176 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:38:02,176 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:38:02,176 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 129 transitions. [2024-06-27 19:38:02,176 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.375 [2024-06-27 19:38:02,176 INFO L175 Difference]: Start difference. First operand has 338 places, 458 transitions, 6438 flow. Second operand 8 states and 129 transitions. [2024-06-27 19:38:02,176 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 345 places, 488 transitions, 7554 flow [2024-06-27 19:38:04,224 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 341 places, 488 transitions, 7352 flow, removed 53 selfloop flow, removed 4 redundant places. [2024-06-27 19:38:04,229 INFO L231 Difference]: Finished difference. Result has 342 places, 460 transitions, 6349 flow [2024-06-27 19:38:04,230 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=6238, PETRI_DIFFERENCE_MINUEND_PLACES=334, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=458, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=429, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6349, PETRI_PLACES=342, PETRI_TRANSITIONS=460} [2024-06-27 19:38:04,230 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 298 predicate places. [2024-06-27 19:38:04,230 INFO L495 AbstractCegarLoop]: Abstraction has has 342 places, 460 transitions, 6349 flow [2024-06-27 19:38:04,230 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 8.545454545454545) internal successors, (94), 11 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 19:38:04,230 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:38:04,230 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:38:04,231 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93 [2024-06-27 19:38:04,231 INFO L420 AbstractCegarLoop]: === Iteration 95 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:38:04,231 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:38:04,231 INFO L85 PathProgramCache]: Analyzing trace with hash -1746136273, now seen corresponding path program 2 times [2024-06-27 19:38:04,231 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:38:04,231 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1551347181] [2024-06-27 19:38:04,231 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:38:04,231 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:38:04,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:38:05,260 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:38:05,260 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:38:05,260 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1551347181] [2024-06-27 19:38:05,260 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1551347181] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:38:05,260 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:38:05,260 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 19:38:05,260 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [801444281] [2024-06-27 19:38:05,261 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:38:05,261 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 19:38:05,261 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:38:05,261 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 19:38:05,261 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2024-06-27 19:38:05,401 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 43 [2024-06-27 19:38:05,401 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 342 places, 460 transitions, 6349 flow. Second operand has 11 states, 11 states have (on average 8.545454545454545) internal successors, (94), 11 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 19:38:05,401 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:38:05,401 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 43 [2024-06-27 19:38:05,401 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:38:07,534 INFO L124 PetriNetUnfolderBase]: 5438/8187 cut-off events. [2024-06-27 19:38:07,535 INFO L125 PetriNetUnfolderBase]: For 1015837/1015841 co-relation queries the response was YES. [2024-06-27 19:38:07,609 INFO L83 FinitePrefix]: Finished finitePrefix Result has 74283 conditions, 8187 events. 5438/8187 cut-off events. For 1015837/1015841 co-relation queries the response was YES. Maximal size of possible extension queue 378. Compared 45883 event pairs, 1270 based on Foata normal form. 6/8191 useless extension candidates. Maximal degree in co-relation 74124. Up to 8031 conditions per place. [2024-06-27 19:38:07,645 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 454 selfloop transitions, 30 changer transitions 0/487 dead transitions. [2024-06-27 19:38:07,645 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 349 places, 487 transitions, 7455 flow [2024-06-27 19:38:07,645 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:38:07,646 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:38:07,646 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 127 transitions. [2024-06-27 19:38:07,646 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3691860465116279 [2024-06-27 19:38:07,646 INFO L175 Difference]: Start difference. First operand has 342 places, 460 transitions, 6349 flow. Second operand 8 states and 127 transitions. [2024-06-27 19:38:07,646 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 349 places, 487 transitions, 7455 flow [2024-06-27 19:38:10,518 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 343 places, 487 transitions, 7360 flow, removed 20 selfloop flow, removed 6 redundant places. [2024-06-27 19:38:10,524 INFO L231 Difference]: Finished difference. Result has 344 places, 462 transitions, 6371 flow [2024-06-27 19:38:10,524 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=6254, PETRI_DIFFERENCE_MINUEND_PLACES=336, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=460, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=430, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6371, PETRI_PLACES=344, PETRI_TRANSITIONS=462} [2024-06-27 19:38:10,524 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 300 predicate places. [2024-06-27 19:38:10,524 INFO L495 AbstractCegarLoop]: Abstraction has has 344 places, 462 transitions, 6371 flow [2024-06-27 19:38:10,525 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 8.545454545454545) internal successors, (94), 11 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 19:38:10,525 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:38:10,525 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:38:10,525 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94 [2024-06-27 19:38:10,525 INFO L420 AbstractCegarLoop]: === Iteration 96 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:38:10,525 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:38:10,525 INFO L85 PathProgramCache]: Analyzing trace with hash -1735094383, now seen corresponding path program 3 times [2024-06-27 19:38:10,526 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:38:10,526 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1885425533] [2024-06-27 19:38:10,526 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:38:10,526 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:38:10,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:38:11,468 INFO 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 19:38:11,468 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:38:11,468 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1885425533] [2024-06-27 19:38:11,468 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1885425533] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:38:11,468 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:38:11,469 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 19:38:11,469 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1758511073] [2024-06-27 19:38:11,469 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:38:11,469 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 19:38:11,469 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:38:11,469 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 19:38:11,469 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2024-06-27 19:38:11,566 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 43 [2024-06-27 19:38:11,566 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 344 places, 462 transitions, 6371 flow. Second operand has 11 states, 11 states have (on average 8.545454545454545) internal successors, (94), 11 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 19:38:11,567 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:38:11,567 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 43 [2024-06-27 19:38:11,567 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:38:13,621 INFO L124 PetriNetUnfolderBase]: 5446/8200 cut-off events. [2024-06-27 19:38:13,621 INFO L125 PetriNetUnfolderBase]: For 1038898/1038898 co-relation queries the response was YES. [2024-06-27 19:38:13,695 INFO L83 FinitePrefix]: Finished finitePrefix Result has 74774 conditions, 8200 events. 5446/8200 cut-off events. For 1038898/1038898 co-relation queries the response was YES. Maximal size of possible extension queue 380. Compared 45968 event pairs, 1274 based on Foata normal form. 2/8200 useless extension candidates. Maximal degree in co-relation 74614. Up to 8004 conditions per place. [2024-06-27 19:38:13,728 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 436 selfloop transitions, 45 changer transitions 0/484 dead transitions. [2024-06-27 19:38:13,728 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 351 places, 484 transitions, 7457 flow [2024-06-27 19:38:13,729 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:38:13,729 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:38:13,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 125 transitions. [2024-06-27 19:38:13,729 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3633720930232558 [2024-06-27 19:38:13,729 INFO L175 Difference]: Start difference. First operand has 344 places, 462 transitions, 6371 flow. Second operand 8 states and 125 transitions. [2024-06-27 19:38:13,730 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 351 places, 484 transitions, 7457 flow [2024-06-27 19:38:16,654 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 345 places, 484 transitions, 7351 flow, removed 22 selfloop flow, removed 6 redundant places. [2024-06-27 19:38:16,660 INFO L231 Difference]: Finished difference. Result has 346 places, 464 transitions, 6418 flow [2024-06-27 19:38:16,660 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=6265, PETRI_DIFFERENCE_MINUEND_PLACES=338, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=462, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=417, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6418, PETRI_PLACES=346, PETRI_TRANSITIONS=464} [2024-06-27 19:38:16,660 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 302 predicate places. [2024-06-27 19:38:16,660 INFO L495 AbstractCegarLoop]: Abstraction has has 346 places, 464 transitions, 6418 flow [2024-06-27 19:38:16,660 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 8.545454545454545) internal successors, (94), 11 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 19:38:16,661 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:38:16,661 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:38:16,661 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable95 [2024-06-27 19:38:16,661 INFO L420 AbstractCegarLoop]: === Iteration 97 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:38:16,661 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:38:16,661 INFO L85 PathProgramCache]: Analyzing trace with hash 1841443667, now seen corresponding path program 1 times [2024-06-27 19:38:16,661 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:38:16,661 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [78512191] [2024-06-27 19:38:16,662 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:38:16,662 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:38:16,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:38:17,415 INFO 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 19:38:17,415 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:38:17,415 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [78512191] [2024-06-27 19:38:17,415 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [78512191] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:38:17,415 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:38:17,415 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 19:38:17,416 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [35358477] [2024-06-27 19:38:17,416 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:38:17,416 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 19:38:17,416 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:38:17,416 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 19:38:17,416 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-27 19:38:17,473 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 43 [2024-06-27 19:38:17,473 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 346 places, 464 transitions, 6418 flow. Second operand has 10 states, 10 states have (on average 8.6) internal successors, (86), 10 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:38:17,473 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:38:17,474 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 43 [2024-06-27 19:38:17,474 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:38:19,612 INFO L124 PetriNetUnfolderBase]: 5466/8231 cut-off events. [2024-06-27 19:38:19,612 INFO L125 PetriNetUnfolderBase]: For 1069498/1069506 co-relation queries the response was YES. [2024-06-27 19:38:19,687 INFO L83 FinitePrefix]: Finished finitePrefix Result has 75379 conditions, 8231 events. 5466/8231 cut-off events. For 1069498/1069506 co-relation queries the response was YES. Maximal size of possible extension queue 384. Compared 46298 event pairs, 1367 based on Foata normal form. 10/8237 useless extension candidates. Maximal degree in co-relation 75218. Up to 7846 conditions per place. [2024-06-27 19:38:19,718 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 441 selfloop transitions, 59 changer transitions 0/503 dead transitions. [2024-06-27 19:38:19,718 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 353 places, 503 transitions, 7654 flow [2024-06-27 19:38:19,719 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:38:19,719 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:38:19,719 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 137 transitions. [2024-06-27 19:38:19,720 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39825581395348836 [2024-06-27 19:38:19,720 INFO L175 Difference]: Start difference. First operand has 346 places, 464 transitions, 6418 flow. Second operand 8 states and 137 transitions. [2024-06-27 19:38:19,720 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 353 places, 503 transitions, 7654 flow [2024-06-27 19:38:23,136 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 348 places, 503 transitions, 7539 flow, removed 24 selfloop flow, removed 5 redundant places. [2024-06-27 19:38:23,142 INFO L231 Difference]: Finished difference. Result has 351 places, 475 transitions, 6591 flow [2024-06-27 19:38:23,142 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=6303, PETRI_DIFFERENCE_MINUEND_PLACES=341, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=464, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=48, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=412, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6591, PETRI_PLACES=351, PETRI_TRANSITIONS=475} [2024-06-27 19:38:23,143 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 307 predicate places. [2024-06-27 19:38:23,143 INFO L495 AbstractCegarLoop]: Abstraction has has 351 places, 475 transitions, 6591 flow [2024-06-27 19:38:23,143 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.6) internal successors, (86), 10 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:38:23,143 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:38:23,143 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:38:23,143 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable96 [2024-06-27 19:38:23,143 INFO L420 AbstractCegarLoop]: === Iteration 98 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:38:23,143 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:38:23,144 INFO L85 PathProgramCache]: Analyzing trace with hash 1836979667, now seen corresponding path program 2 times [2024-06-27 19:38:23,144 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:38:23,144 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [325731966] [2024-06-27 19:38:23,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:38:23,144 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:38:23,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:38:23,969 INFO 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 19:38:23,969 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:38:23,969 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [325731966] [2024-06-27 19:38:23,969 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [325731966] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:38:23,969 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:38:23,970 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 19:38:23,970 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1836603840] [2024-06-27 19:38:23,970 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:38:23,970 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 19:38:23,970 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:38:23,970 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 19:38:23,971 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-27 19:38:24,018 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 43 [2024-06-27 19:38:24,018 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 351 places, 475 transitions, 6591 flow. Second operand has 10 states, 10 states have (on average 8.6) internal successors, (86), 10 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:38:24,018 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:38:24,018 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 43 [2024-06-27 19:38:24,018 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:38:26,212 INFO L124 PetriNetUnfolderBase]: 5502/8278 cut-off events. [2024-06-27 19:38:26,212 INFO L125 PetriNetUnfolderBase]: For 1102694/1102700 co-relation queries the response was YES. [2024-06-27 19:38:26,288 INFO L83 FinitePrefix]: Finished finitePrefix Result has 76947 conditions, 8278 events. 5502/8278 cut-off events. For 1102694/1102700 co-relation queries the response was YES. Maximal size of possible extension queue 390. Compared 46514 event pairs, 1313 based on Foata normal form. 8/8284 useless extension candidates. Maximal degree in co-relation 76783. Up to 7832 conditions per place. [2024-06-27 19:38:26,319 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 437 selfloop transitions, 70 changer transitions 0/510 dead transitions. [2024-06-27 19:38:26,320 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 358 places, 510 transitions, 8033 flow [2024-06-27 19:38:26,320 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:38:26,320 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:38:26,321 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 141 transitions. [2024-06-27 19:38:26,321 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40988372093023256 [2024-06-27 19:38:26,321 INFO L175 Difference]: Start difference. First operand has 351 places, 475 transitions, 6591 flow. Second operand 8 states and 141 transitions. [2024-06-27 19:38:26,321 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 358 places, 510 transitions, 8033 flow [2024-06-27 19:38:29,694 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 355 places, 510 transitions, 7931 flow, removed 26 selfloop flow, removed 3 redundant places. [2024-06-27 19:38:29,700 INFO L231 Difference]: Finished difference. Result has 356 places, 481 transitions, 6766 flow [2024-06-27 19:38:29,700 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=6489, PETRI_DIFFERENCE_MINUEND_PLACES=348, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=475, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=67, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=408, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6766, PETRI_PLACES=356, PETRI_TRANSITIONS=481} [2024-06-27 19:38:29,706 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 312 predicate places. [2024-06-27 19:38:29,707 INFO L495 AbstractCegarLoop]: Abstraction has has 356 places, 481 transitions, 6766 flow [2024-06-27 19:38:29,707 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.6) internal successors, (86), 10 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:38:29,707 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:38:29,707 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:38:29,707 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable97 [2024-06-27 19:38:29,707 INFO L420 AbstractCegarLoop]: === Iteration 99 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:38:29,707 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:38:29,707 INFO L85 PathProgramCache]: Analyzing trace with hash -342056655, now seen corresponding path program 3 times [2024-06-27 19:38:29,708 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:38:29,708 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [267286643] [2024-06-27 19:38:29,708 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:38:29,708 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:38:29,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:38:30,593 INFO 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 19:38:30,594 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:38:30,594 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [267286643] [2024-06-27 19:38:30,594 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [267286643] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:38:30,594 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:38:30,594 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 19:38:30,594 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1774022003] [2024-06-27 19:38:30,594 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:38:30,594 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 19:38:30,594 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:38:30,594 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 19:38:30,594 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2024-06-27 19:38:30,660 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 43 [2024-06-27 19:38:30,661 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 356 places, 481 transitions, 6766 flow. Second operand has 10 states, 10 states have (on average 8.6) internal successors, (86), 10 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:38:30,661 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:38:30,661 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 43 [2024-06-27 19:38:30,661 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:38:32,813 INFO L124 PetriNetUnfolderBase]: 5596/8414 cut-off events. [2024-06-27 19:38:32,813 INFO L125 PetriNetUnfolderBase]: For 1145763/1145765 co-relation queries the response was YES. [2024-06-27 19:38:32,902 INFO L83 FinitePrefix]: Finished finitePrefix Result has 78658 conditions, 8414 events. 5596/8414 cut-off events. For 1145763/1145765 co-relation queries the response was YES. Maximal size of possible extension queue 400. Compared 47223 event pairs, 1104 based on Foata normal form. 6/8415 useless extension candidates. Maximal degree in co-relation 78492. Up to 7617 conditions per place. [2024-06-27 19:38:32,937 INFO L140 encePairwiseOnDemand]: 29/43 looper letters, 420 selfloop transitions, 107 changer transitions 0/530 dead transitions. [2024-06-27 19:38:32,938 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 365 places, 530 transitions, 8440 flow [2024-06-27 19:38:32,938 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 19:38:32,938 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 19:38:32,938 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 169 transitions. [2024-06-27 19:38:32,939 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3930232558139535 [2024-06-27 19:38:32,939 INFO L175 Difference]: Start difference. First operand has 356 places, 481 transitions, 6766 flow. Second operand 10 states and 169 transitions. [2024-06-27 19:38:32,939 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 365 places, 530 transitions, 8440 flow [2024-06-27 19:38:36,764 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 361 places, 530 transitions, 8274 flow, removed 52 selfloop flow, removed 4 redundant places. [2024-06-27 19:38:36,771 INFO L231 Difference]: Finished difference. Result has 364 places, 495 transitions, 7152 flow [2024-06-27 19:38:36,771 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=6655, PETRI_DIFFERENCE_MINUEND_PLACES=352, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=481, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=93, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=377, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=7152, PETRI_PLACES=364, PETRI_TRANSITIONS=495} [2024-06-27 19:38:36,771 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 320 predicate places. [2024-06-27 19:38:36,771 INFO L495 AbstractCegarLoop]: Abstraction has has 364 places, 495 transitions, 7152 flow [2024-06-27 19:38:36,772 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.6) internal successors, (86), 10 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:38:36,772 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:38:36,772 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:38:36,772 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable98 [2024-06-27 19:38:36,772 INFO L420 AbstractCegarLoop]: === Iteration 100 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:38:36,772 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:38:36,772 INFO L85 PathProgramCache]: Analyzing trace with hash 346417039, now seen corresponding path program 1 times [2024-06-27 19:38:36,772 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:38:36,773 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [603272438] [2024-06-27 19:38:36,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:38:36,773 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:38:36,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:38:37,539 INFO 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 19:38:37,539 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:38:37,539 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [603272438] [2024-06-27 19:38:37,539 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [603272438] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:38:37,539 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:38:37,539 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 19:38:37,539 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [912109680] [2024-06-27 19:38:37,539 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:38:37,540 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 19:38:37,540 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:38:37,540 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 19:38:37,540 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-27 19:38:37,595 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 43 [2024-06-27 19:38:37,595 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 364 places, 495 transitions, 7152 flow. Second operand has 9 states, 9 states have (on average 8.777777777777779) internal successors, (79), 9 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:38:37,595 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:38:37,595 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 43 [2024-06-27 19:38:37,595 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:38:39,686 INFO L124 PetriNetUnfolderBase]: 5616/8442 cut-off events. [2024-06-27 19:38:39,687 INFO L125 PetriNetUnfolderBase]: For 1173171/1173179 co-relation queries the response was YES. [2024-06-27 19:38:39,774 INFO L83 FinitePrefix]: Finished finitePrefix Result has 80310 conditions, 8442 events. 5616/8442 cut-off events. For 1173171/1173179 co-relation queries the response was YES. Maximal size of possible extension queue 404. Compared 47580 event pairs, 1445 based on Foata normal form. 10/8448 useless extension candidates. Maximal degree in co-relation 80140. Up to 7982 conditions per place. [2024-06-27 19:38:39,809 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 417 selfloop transitions, 99 changer transitions 0/519 dead transitions. [2024-06-27 19:38:39,809 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 371 places, 519 transitions, 8581 flow [2024-06-27 19:38:39,812 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:38:39,812 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:38:39,812 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 130 transitions. [2024-06-27 19:38:39,812 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37790697674418605 [2024-06-27 19:38:39,812 INFO L175 Difference]: Start difference. First operand has 364 places, 495 transitions, 7152 flow. Second operand 8 states and 130 transitions. [2024-06-27 19:38:39,812 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 371 places, 519 transitions, 8581 flow [2024-06-27 19:38:43,828 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 366 places, 519 transitions, 8392 flow, removed 39 selfloop flow, removed 5 redundant places. [2024-06-27 19:38:43,835 INFO L231 Difference]: Finished difference. Result has 367 places, 498 transitions, 7238 flow [2024-06-27 19:38:43,835 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=6963, PETRI_DIFFERENCE_MINUEND_PLACES=359, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=495, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=96, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=396, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7238, PETRI_PLACES=367, PETRI_TRANSITIONS=498} [2024-06-27 19:38:43,835 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 323 predicate places. [2024-06-27 19:38:43,835 INFO L495 AbstractCegarLoop]: Abstraction has has 367 places, 498 transitions, 7238 flow [2024-06-27 19:38:43,836 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.777777777777779) internal successors, (79), 9 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:38:43,836 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:38:43,836 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:38:43,836 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable99 [2024-06-27 19:38:43,836 INFO L420 AbstractCegarLoop]: === Iteration 101 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:38:43,836 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:38:43,836 INFO L85 PathProgramCache]: Analyzing trace with hash -1847799665, now seen corresponding path program 2 times [2024-06-27 19:38:43,836 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:38:43,837 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2106856001] [2024-06-27 19:38:43,837 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:38:43,837 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:38:43,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:38:44,740 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:38:44,741 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:38:44,741 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2106856001] [2024-06-27 19:38:44,741 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2106856001] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:38:44,741 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:38:44,741 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 19:38:44,741 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2042594828] [2024-06-27 19:38:44,741 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:38:44,741 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 19:38:44,742 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:38:44,742 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 19:38:44,742 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-27 19:38:44,788 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 43 [2024-06-27 19:38:44,788 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 367 places, 498 transitions, 7238 flow. Second operand has 10 states, 10 states have (on average 8.6) internal successors, (86), 10 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:38:44,788 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:38:44,789 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 43 [2024-06-27 19:38:44,789 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:38:47,111 INFO L124 PetriNetUnfolderBase]: 5838/8752 cut-off events. [2024-06-27 19:38:47,111 INFO L125 PetriNetUnfolderBase]: For 1215510/1215518 co-relation queries the response was YES. [2024-06-27 19:38:47,217 INFO L83 FinitePrefix]: Finished finitePrefix Result has 83082 conditions, 8752 events. 5838/8752 cut-off events. For 1215510/1215518 co-relation queries the response was YES. Maximal size of possible extension queue 431. Compared 49462 event pairs, 1470 based on Foata normal form. 10/8758 useless extension candidates. Maximal degree in co-relation 82911. Up to 8250 conditions per place. [2024-06-27 19:38:47,257 INFO L140 encePairwiseOnDemand]: 29/43 looper letters, 476 selfloop transitions, 85 changer transitions 0/564 dead transitions. [2024-06-27 19:38:47,257 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 376 places, 564 transitions, 9266 flow [2024-06-27 19:38:47,258 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 19:38:47,258 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 19:38:47,258 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 163 transitions. [2024-06-27 19:38:47,259 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37906976744186044 [2024-06-27 19:38:47,259 INFO L175 Difference]: Start difference. First operand has 367 places, 498 transitions, 7238 flow. Second operand 10 states and 163 transitions. [2024-06-27 19:38:47,259 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 376 places, 564 transitions, 9266 flow [2024-06-27 19:38:51,477 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 370 places, 564 transitions, 8992 flow, removed 38 selfloop flow, removed 6 redundant places. [2024-06-27 19:38:51,499 INFO L231 Difference]: Finished difference. Result has 373 places, 529 transitions, 7692 flow [2024-06-27 19:38:51,499 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=7010, PETRI_DIFFERENCE_MINUEND_PLACES=361, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=498, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=56, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=415, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=7692, PETRI_PLACES=373, PETRI_TRANSITIONS=529} [2024-06-27 19:38:51,500 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 329 predicate places. [2024-06-27 19:38:51,500 INFO L495 AbstractCegarLoop]: Abstraction has has 373 places, 529 transitions, 7692 flow [2024-06-27 19:38:51,500 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.6) internal successors, (86), 10 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:38:51,500 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:38:51,500 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:38:51,500 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable100 [2024-06-27 19:38:51,500 INFO L420 AbstractCegarLoop]: === Iteration 102 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:38:51,501 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:38:51,501 INFO L85 PathProgramCache]: Analyzing trace with hash 146878289, now seen corresponding path program 4 times [2024-06-27 19:38:51,501 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:38:51,501 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [322659037] [2024-06-27 19:38:51,501 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:38:51,501 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:38:51,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:38:52,334 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:38:52,335 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:38:52,335 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [322659037] [2024-06-27 19:38:52,335 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [322659037] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:38:52,335 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:38:52,335 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 19:38:52,335 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2031147458] [2024-06-27 19:38:52,335 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:38:52,336 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 19:38:52,336 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:38:52,336 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 19:38:52,336 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-06-27 19:38:52,388 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 43 [2024-06-27 19:38:52,388 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 373 places, 529 transitions, 7692 flow. Second operand has 10 states, 10 states have (on average 8.6) internal successors, (86), 10 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:38:52,388 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:38:52,388 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 43 [2024-06-27 19:38:52,388 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:38:54,642 INFO L124 PetriNetUnfolderBase]: 5878/8806 cut-off events. [2024-06-27 19:38:54,642 INFO L125 PetriNetUnfolderBase]: For 1264015/1264024 co-relation queries the response was YES. [2024-06-27 19:38:54,741 INFO L83 FinitePrefix]: Finished finitePrefix Result has 84327 conditions, 8806 events. 5878/8806 cut-off events. For 1264015/1264024 co-relation queries the response was YES. Maximal size of possible extension queue 438. Compared 49787 event pairs, 1411 based on Foata normal form. 14/8815 useless extension candidates. Maximal degree in co-relation 84153. Up to 8385 conditions per place. [2024-06-27 19:38:54,781 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 495 selfloop transitions, 65 changer transitions 0/563 dead transitions. [2024-06-27 19:38:54,781 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 380 places, 563 transitions, 9092 flow [2024-06-27 19:38:54,782 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:38:54,782 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:38:54,782 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 134 transitions. [2024-06-27 19:38:54,782 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38953488372093026 [2024-06-27 19:38:54,782 INFO L175 Difference]: Start difference. First operand has 373 places, 529 transitions, 7692 flow. Second operand 8 states and 134 transitions. [2024-06-27 19:38:54,783 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 380 places, 563 transitions, 9092 flow [2024-06-27 19:38:58,943 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 375 places, 563 transitions, 8909 flow, removed 56 selfloop flow, removed 5 redundant places. [2024-06-27 19:38:58,950 INFO L231 Difference]: Finished difference. Result has 376 places, 537 transitions, 7830 flow [2024-06-27 19:38:58,951 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=7509, PETRI_DIFFERENCE_MINUEND_PLACES=368, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=529, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=57, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=466, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7830, PETRI_PLACES=376, PETRI_TRANSITIONS=537} [2024-06-27 19:38:58,951 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 332 predicate places. [2024-06-27 19:38:58,951 INFO L495 AbstractCegarLoop]: Abstraction has has 376 places, 537 transitions, 7830 flow [2024-06-27 19:38:58,951 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.6) internal successors, (86), 10 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:38:58,951 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:38:58,951 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:38:58,951 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable101 [2024-06-27 19:38:58,952 INFO L420 AbstractCegarLoop]: === Iteration 103 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:38:58,952 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:38:58,952 INFO L85 PathProgramCache]: Analyzing trace with hash -51818161, now seen corresponding path program 7 times [2024-06-27 19:38:58,952 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:38:58,952 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [69342685] [2024-06-27 19:38:58,952 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:38:58,952 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:38:58,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:38:59,661 INFO 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 19:38:59,661 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:38:59,661 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [69342685] [2024-06-27 19:38:59,661 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [69342685] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:38:59,661 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:38:59,661 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 19:38:59,661 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [37837120] [2024-06-27 19:38:59,661 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:38:59,662 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 19:38:59,662 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:38:59,662 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 19:38:59,662 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2024-06-27 19:38:59,742 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 43 [2024-06-27 19:38:59,742 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 376 places, 537 transitions, 7830 flow. Second operand has 10 states, 10 states have (on average 8.6) internal successors, (86), 10 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:38:59,742 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:38:59,742 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 43 [2024-06-27 19:38:59,742 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:39:02,031 INFO L124 PetriNetUnfolderBase]: 5898/8837 cut-off events. [2024-06-27 19:39:02,032 INFO L125 PetriNetUnfolderBase]: For 1273521/1273526 co-relation queries the response was YES. [2024-06-27 19:39:02,139 INFO L83 FinitePrefix]: Finished finitePrefix Result has 84927 conditions, 8837 events. 5898/8837 cut-off events. For 1273521/1273526 co-relation queries the response was YES. Maximal size of possible extension queue 441. Compared 49921 event pairs, 1323 based on Foata normal form. 6/8837 useless extension candidates. Maximal degree in co-relation 84751. Up to 8314 conditions per place. [2024-06-27 19:39:02,176 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 490 selfloop transitions, 71 changer transitions 0/564 dead transitions. [2024-06-27 19:39:02,177 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 383 places, 564 transitions, 9128 flow [2024-06-27 19:39:02,177 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:39:02,178 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:39:02,178 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 136 transitions. [2024-06-27 19:39:02,178 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3953488372093023 [2024-06-27 19:39:02,178 INFO L175 Difference]: Start difference. First operand has 376 places, 537 transitions, 7830 flow. Second operand 8 states and 136 transitions. [2024-06-27 19:39:02,178 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 383 places, 564 transitions, 9128 flow [2024-06-27 19:39:05,649 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 379 places, 564 transitions, 8933 flow, removed 54 selfloop flow, removed 4 redundant places. [2024-06-27 19:39:05,656 INFO L231 Difference]: Finished difference. Result has 380 places, 540 transitions, 7871 flow [2024-06-27 19:39:05,657 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=7635, PETRI_DIFFERENCE_MINUEND_PLACES=372, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=537, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=68, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=466, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7871, PETRI_PLACES=380, PETRI_TRANSITIONS=540} [2024-06-27 19:39:05,657 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 336 predicate places. [2024-06-27 19:39:05,657 INFO L495 AbstractCegarLoop]: Abstraction has has 380 places, 540 transitions, 7871 flow [2024-06-27 19:39:05,657 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.6) internal successors, (86), 10 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:39:05,657 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:39:05,658 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:39:05,658 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable102 [2024-06-27 19:39:05,658 INFO L420 AbstractCegarLoop]: === Iteration 104 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:39:05,658 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:39:05,658 INFO L85 PathProgramCache]: Analyzing trace with hash 371974239, now seen corresponding path program 2 times [2024-06-27 19:39:05,658 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:39:05,659 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [778243813] [2024-06-27 19:39:05,659 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:39:05,659 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:39:05,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:39:06,509 INFO 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 19:39:06,509 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:39:06,510 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [778243813] [2024-06-27 19:39:06,510 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [778243813] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:39:06,510 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:39:06,510 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 19:39:06,510 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [513497024] [2024-06-27 19:39:06,510 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:39:06,510 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 19:39:06,510 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:39:06,511 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 19:39:06,511 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-27 19:39:06,560 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 43 [2024-06-27 19:39:06,560 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 380 places, 540 transitions, 7871 flow. Second operand has 10 states, 10 states have (on average 8.6) internal successors, (86), 10 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:39:06,560 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:39:06,560 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 43 [2024-06-27 19:39:06,560 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:39:08,750 INFO L124 PetriNetUnfolderBase]: 5885/8815 cut-off events. [2024-06-27 19:39:08,750 INFO L125 PetriNetUnfolderBase]: For 1281487/1281496 co-relation queries the response was YES. [2024-06-27 19:39:08,864 INFO L83 FinitePrefix]: Finished finitePrefix Result has 84862 conditions, 8815 events. 5885/8815 cut-off events. For 1281487/1281496 co-relation queries the response was YES. Maximal size of possible extension queue 441. Compared 49810 event pairs, 1531 based on Foata normal form. 7/8817 useless extension candidates. Maximal degree in co-relation 84685. Up to 8580 conditions per place. [2024-06-27 19:39:08,906 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 507 selfloop transitions, 49 changer transitions 0/559 dead transitions. [2024-06-27 19:39:08,907 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 386 places, 559 transitions, 9077 flow [2024-06-27 19:39:08,907 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 19:39:08,907 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 19:39:08,907 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 116 transitions. [2024-06-27 19:39:08,907 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3853820598006645 [2024-06-27 19:39:08,908 INFO L175 Difference]: Start difference. First operand has 380 places, 540 transitions, 7871 flow. Second operand 7 states and 116 transitions. [2024-06-27 19:39:08,908 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 386 places, 559 transitions, 9077 flow [2024-06-27 19:39:13,635 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 380 places, 559 transitions, 8843 flow, removed 48 selfloop flow, removed 6 redundant places. [2024-06-27 19:39:13,641 INFO L231 Difference]: Finished difference. Result has 381 places, 540 transitions, 7753 flow [2024-06-27 19:39:13,641 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=7637, PETRI_DIFFERENCE_MINUEND_PLACES=374, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=540, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=49, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=491, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=7753, PETRI_PLACES=381, PETRI_TRANSITIONS=540} [2024-06-27 19:39:13,656 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 337 predicate places. [2024-06-27 19:39:13,656 INFO L495 AbstractCegarLoop]: Abstraction has has 381 places, 540 transitions, 7753 flow [2024-06-27 19:39:13,656 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.6) internal successors, (86), 10 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:39:13,656 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:39:13,656 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:39:13,657 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable103 [2024-06-27 19:39:13,657 INFO L420 AbstractCegarLoop]: === Iteration 105 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:39:13,657 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:39:13,657 INFO L85 PathProgramCache]: Analyzing trace with hash 378588647, now seen corresponding path program 5 times [2024-06-27 19:39:13,657 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:39:13,657 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1698654704] [2024-06-27 19:39:13,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:39:13,658 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:39:13,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:39:14,532 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 19:39:14,532 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:39:14,532 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1698654704] [2024-06-27 19:39:14,533 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1698654704] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:39:14,533 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:39:14,533 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 19:39:14,533 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1107865419] [2024-06-27 19:39:14,533 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:39:14,533 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 19:39:14,533 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:39:14,534 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 19:39:14,534 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-27 19:39:14,598 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 43 [2024-06-27 19:39:14,598 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 381 places, 540 transitions, 7753 flow. Second operand has 10 states, 10 states have (on average 8.6) internal successors, (86), 10 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:39:14,598 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:39:14,598 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 43 [2024-06-27 19:39:14,598 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:39:16,865 INFO L124 PetriNetUnfolderBase]: 5949/8904 cut-off events. [2024-06-27 19:39:16,865 INFO L125 PetriNetUnfolderBase]: For 1351144/1351153 co-relation queries the response was YES. [2024-06-27 19:39:16,965 INFO L83 FinitePrefix]: Finished finitePrefix Result has 85958 conditions, 8904 events. 5949/8904 cut-off events. For 1351144/1351153 co-relation queries the response was YES. Maximal size of possible extension queue 450. Compared 50367 event pairs, 1398 based on Foata normal form. 14/8913 useless extension candidates. Maximal degree in co-relation 85781. Up to 8368 conditions per place. [2024-06-27 19:39:17,003 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 491 selfloop transitions, 81 changer transitions 0/575 dead transitions. [2024-06-27 19:39:17,003 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 388 places, 575 transitions, 9446 flow [2024-06-27 19:39:17,004 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:39:17,004 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:39:17,004 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 136 transitions. [2024-06-27 19:39:17,004 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3953488372093023 [2024-06-27 19:39:17,005 INFO L175 Difference]: Start difference. First operand has 381 places, 540 transitions, 7753 flow. Second operand 8 states and 136 transitions. [2024-06-27 19:39:17,005 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 388 places, 575 transitions, 9446 flow [2024-06-27 19:39:23,030 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 382 places, 575 transitions, 9310 flow, removed 7 selfloop flow, removed 6 redundant places. [2024-06-27 19:39:23,037 INFO L231 Difference]: Finished difference. Result has 383 places, 549 transitions, 8034 flow [2024-06-27 19:39:23,037 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=7621, PETRI_DIFFERENCE_MINUEND_PLACES=375, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=540, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=75, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=465, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=8034, PETRI_PLACES=383, PETRI_TRANSITIONS=549} [2024-06-27 19:39:23,037 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 339 predicate places. [2024-06-27 19:39:23,037 INFO L495 AbstractCegarLoop]: Abstraction has has 383 places, 549 transitions, 8034 flow [2024-06-27 19:39:23,037 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.6) internal successors, (86), 10 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:39:23,037 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:39:23,038 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:39:23,038 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable104 [2024-06-27 19:39:23,038 INFO L420 AbstractCegarLoop]: === Iteration 106 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:39:23,038 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:39:23,038 INFO L85 PathProgramCache]: Analyzing trace with hash -51489871, now seen corresponding path program 8 times [2024-06-27 19:39:23,038 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:39:23,038 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1851480982] [2024-06-27 19:39:23,038 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:39:23,039 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:39:23,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:39:23,750 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:39:23,751 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:39:23,751 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1851480982] [2024-06-27 19:39:23,751 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1851480982] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:39:23,751 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:39:23,751 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 19:39:23,751 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [729286977] [2024-06-27 19:39:23,751 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:39:23,752 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 19:39:23,752 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:39:23,752 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 19:39:23,752 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-27 19:39:23,822 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 43 [2024-06-27 19:39:23,829 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 383 places, 549 transitions, 8034 flow. Second operand has 10 states, 10 states have (on average 8.6) internal successors, (86), 10 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:39:23,829 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:39:23,829 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 43 [2024-06-27 19:39:23,829 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:39:26,055 INFO L124 PetriNetUnfolderBase]: 5937/8891 cut-off events. [2024-06-27 19:39:26,055 INFO L125 PetriNetUnfolderBase]: For 1290542/1290547 co-relation queries the response was YES. [2024-06-27 19:39:26,176 INFO L83 FinitePrefix]: Finished finitePrefix Result has 85377 conditions, 8891 events. 5937/8891 cut-off events. For 1290542/1290547 co-relation queries the response was YES. Maximal size of possible extension queue 450. Compared 50201 event pairs, 1318 based on Foata normal form. 6/8891 useless extension candidates. Maximal degree in co-relation 85199. Up to 8324 conditions per place. [2024-06-27 19:39:26,220 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 491 selfloop transitions, 79 changer transitions 0/573 dead transitions. [2024-06-27 19:39:26,220 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 390 places, 573 transitions, 9288 flow [2024-06-27 19:39:26,220 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:39:26,220 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:39:26,221 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 137 transitions. [2024-06-27 19:39:26,221 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39825581395348836 [2024-06-27 19:39:26,221 INFO L175 Difference]: Start difference. First operand has 383 places, 549 transitions, 8034 flow. Second operand 8 states and 137 transitions. [2024-06-27 19:39:26,221 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 390 places, 573 transitions, 9288 flow [2024-06-27 19:39:30,900 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 386 places, 573 transitions, 9100 flow, removed 64 selfloop flow, removed 4 redundant places. [2024-06-27 19:39:30,907 INFO L231 Difference]: Finished difference. Result has 387 places, 549 transitions, 8011 flow [2024-06-27 19:39:30,907 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=7846, PETRI_DIFFERENCE_MINUEND_PLACES=379, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=549, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=79, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=470, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=8011, PETRI_PLACES=387, PETRI_TRANSITIONS=549} [2024-06-27 19:39:30,907 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 343 predicate places. [2024-06-27 19:39:30,907 INFO L495 AbstractCegarLoop]: Abstraction has has 387 places, 549 transitions, 8011 flow [2024-06-27 19:39:30,907 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.6) internal successors, (86), 10 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:39:30,908 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:39:30,908 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:39:30,908 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable105 [2024-06-27 19:39:30,908 INFO L420 AbstractCegarLoop]: === Iteration 107 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:39:30,908 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:39:30,908 INFO L85 PathProgramCache]: Analyzing trace with hash 184543633, now seen corresponding path program 6 times [2024-06-27 19:39:30,908 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:39:30,908 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1297638231] [2024-06-27 19:39:30,909 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:39:30,909 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:39:30,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:39:31,743 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:39:31,743 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:39:31,743 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1297638231] [2024-06-27 19:39:31,743 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1297638231] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:39:31,743 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:39:31,743 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 19:39:31,744 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [531438822] [2024-06-27 19:39:31,744 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:39:31,744 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 19:39:31,744 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:39:31,746 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 19:39:31,746 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-27 19:39:31,811 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 43 [2024-06-27 19:39:31,812 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 387 places, 549 transitions, 8011 flow. Second operand has 10 states, 10 states have (on average 8.6) internal successors, (86), 10 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:39:31,812 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:39:31,812 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 43 [2024-06-27 19:39:31,812 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:39:34,026 INFO L124 PetriNetUnfolderBase]: 5925/8870 cut-off events. [2024-06-27 19:39:34,026 INFO L125 PetriNetUnfolderBase]: For 1297780/1297780 co-relation queries the response was YES. [2024-06-27 19:39:34,141 INFO L83 FinitePrefix]: Finished finitePrefix Result has 85164 conditions, 8870 events. 5925/8870 cut-off events. For 1297780/1297780 co-relation queries the response was YES. Maximal size of possible extension queue 450. Compared 50191 event pairs, 1588 based on Foata normal form. 4/8872 useless extension candidates. Maximal degree in co-relation 84984. Up to 8742 conditions per place. [2024-06-27 19:39:34,182 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 548 selfloop transitions, 26 changer transitions 0/577 dead transitions. [2024-06-27 19:39:34,182 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 395 places, 577 transitions, 9268 flow [2024-06-27 19:39:34,183 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 19:39:34,183 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 19:39:34,183 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 142 transitions. [2024-06-27 19:39:34,183 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3669250645994832 [2024-06-27 19:39:34,183 INFO L175 Difference]: Start difference. First operand has 387 places, 549 transitions, 8011 flow. Second operand 9 states and 142 transitions. [2024-06-27 19:39:34,184 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 395 places, 577 transitions, 9268 flow [2024-06-27 19:39:39,253 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 387 places, 577 transitions, 8880 flow, removed 56 selfloop flow, removed 8 redundant places. [2024-06-27 19:39:39,259 INFO L231 Difference]: Finished difference. Result has 389 places, 550 transitions, 7693 flow [2024-06-27 19:39:39,259 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=7623, PETRI_DIFFERENCE_MINUEND_PLACES=379, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=549, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=523, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7693, PETRI_PLACES=389, PETRI_TRANSITIONS=550} [2024-06-27 19:39:39,259 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 345 predicate places. [2024-06-27 19:39:39,260 INFO L495 AbstractCegarLoop]: Abstraction has has 389 places, 550 transitions, 7693 flow [2024-06-27 19:39:39,260 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.6) internal successors, (86), 10 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:39:39,260 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:39:39,260 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:39:39,260 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable106 [2024-06-27 19:39:39,260 INFO L420 AbstractCegarLoop]: === Iteration 108 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:39:39,260 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:39:39,260 INFO L85 PathProgramCache]: Analyzing trace with hash 988791813, now seen corresponding path program 7 times [2024-06-27 19:39:39,261 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:39:39,261 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1834374131] [2024-06-27 19:39:39,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:39:39,261 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:39:39,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:39:40,255 INFO 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 19:39:40,256 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:39:40,256 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1834374131] [2024-06-27 19:39:40,256 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1834374131] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:39:40,256 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:39:40,256 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 19:39:40,256 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1349605035] [2024-06-27 19:39:40,256 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:39:40,256 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 19:39:40,257 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:39:40,257 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 19:39:40,257 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-27 19:39:40,343 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 43 [2024-06-27 19:39:40,343 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 389 places, 550 transitions, 7693 flow. Second operand has 10 states, 10 states have (on average 8.6) internal successors, (86), 10 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:39:40,343 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:39:40,344 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 43 [2024-06-27 19:39:40,344 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:39:42,696 INFO L124 PetriNetUnfolderBase]: 6013/8992 cut-off events. [2024-06-27 19:39:42,696 INFO L125 PetriNetUnfolderBase]: For 1366038/1366038 co-relation queries the response was YES. [2024-06-27 19:39:42,815 INFO L83 FinitePrefix]: Finished finitePrefix Result has 86296 conditions, 8992 events. 6013/8992 cut-off events. For 1366038/1366038 co-relation queries the response was YES. Maximal size of possible extension queue 461. Compared 50937 event pairs, 1598 based on Foata normal form. 8/8998 useless extension candidates. Maximal degree in co-relation 86115. Up to 8753 conditions per place. [2024-06-27 19:39:42,858 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 546 selfloop transitions, 40 changer transitions 0/589 dead transitions. [2024-06-27 19:39:42,858 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 398 places, 589 transitions, 9469 flow [2024-06-27 19:39:42,858 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 19:39:42,858 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 19:39:42,859 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 152 transitions. [2024-06-27 19:39:42,859 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.35348837209302325 [2024-06-27 19:39:42,859 INFO L175 Difference]: Start difference. First operand has 389 places, 550 transitions, 7693 flow. Second operand 10 states and 152 transitions. [2024-06-27 19:39:42,859 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 398 places, 589 transitions, 9469 flow [2024-06-27 19:39:49,209 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 391 places, 589 transitions, 9403 flow, removed 8 selfloop flow, removed 7 redundant places. [2024-06-27 19:39:49,216 INFO L231 Difference]: Finished difference. Result has 393 places, 561 transitions, 8037 flow [2024-06-27 19:39:49,216 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=7627, PETRI_DIFFERENCE_MINUEND_PLACES=382, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=550, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=510, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=8037, PETRI_PLACES=393, PETRI_TRANSITIONS=561} [2024-06-27 19:39:49,217 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 349 predicate places. [2024-06-27 19:39:49,217 INFO L495 AbstractCegarLoop]: Abstraction has has 393 places, 561 transitions, 8037 flow [2024-06-27 19:39:49,217 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.6) internal successors, (86), 10 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:39:49,217 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:39:49,217 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:39:49,217 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable107 [2024-06-27 19:39:49,217 INFO L420 AbstractCegarLoop]: === Iteration 109 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:39:49,218 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:39:49,218 INFO L85 PathProgramCache]: Analyzing trace with hash 153485115, now seen corresponding path program 8 times [2024-06-27 19:39:49,218 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:39:49,218 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [875364277] [2024-06-27 19:39:49,218 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:39:49,218 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:39:49,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:39:50,099 INFO 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 19:39:50,100 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:39:50,100 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [875364277] [2024-06-27 19:39:50,100 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [875364277] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:39:50,100 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:39:50,100 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 19:39:50,100 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [748595210] [2024-06-27 19:39:50,100 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:39:50,100 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 19:39:50,101 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:39:50,101 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 19:39:50,101 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-27 19:39:50,178 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 43 [2024-06-27 19:39:50,178 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 393 places, 561 transitions, 8037 flow. Second operand has 10 states, 10 states have (on average 8.6) internal successors, (86), 10 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:39:50,178 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:39:50,179 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 43 [2024-06-27 19:39:50,179 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:39:52,800 INFO L124 PetriNetUnfolderBase]: 6085/9092 cut-off events. [2024-06-27 19:39:52,800 INFO L125 PetriNetUnfolderBase]: For 1415606/1415606 co-relation queries the response was YES. [2024-06-27 19:39:52,901 INFO L83 FinitePrefix]: Finished finitePrefix Result has 88584 conditions, 9092 events. 6085/9092 cut-off events. For 1415606/1415606 co-relation queries the response was YES. Maximal size of possible extension queue 468. Compared 51527 event pairs, 1586 based on Foata normal form. 8/9098 useless extension candidates. Maximal degree in co-relation 88401. Up to 8922 conditions per place. [2024-06-27 19:39:52,939 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 548 selfloop transitions, 42 changer transitions 0/593 dead transitions. [2024-06-27 19:39:52,940 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 401 places, 593 transitions, 9760 flow [2024-06-27 19:39:52,940 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 19:39:52,940 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 19:39:52,941 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 140 transitions. [2024-06-27 19:39:52,941 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36175710594315247 [2024-06-27 19:39:52,941 INFO L175 Difference]: Start difference. First operand has 393 places, 561 transitions, 8037 flow. Second operand 9 states and 140 transitions. [2024-06-27 19:39:52,941 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 401 places, 593 transitions, 9760 flow [2024-06-27 19:39:58,748 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 394 places, 593 transitions, 9553 flow, removed 76 selfloop flow, removed 7 redundant places. [2024-06-27 19:39:58,755 INFO L231 Difference]: Finished difference. Result has 396 places, 570 transitions, 8201 flow [2024-06-27 19:39:58,755 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=7830, PETRI_DIFFERENCE_MINUEND_PLACES=386, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=561, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=519, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8201, PETRI_PLACES=396, PETRI_TRANSITIONS=570} [2024-06-27 19:39:58,756 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 352 predicate places. [2024-06-27 19:39:58,756 INFO L495 AbstractCegarLoop]: Abstraction has has 396 places, 570 transitions, 8201 flow [2024-06-27 19:39:58,756 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.6) internal successors, (86), 10 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:39:58,756 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:39:58,756 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:39:58,756 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable108 [2024-06-27 19:39:58,756 INFO L420 AbstractCegarLoop]: === Iteration 110 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:39:58,757 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:39:58,757 INFO L85 PathProgramCache]: Analyzing trace with hash -270731555, now seen corresponding path program 9 times [2024-06-27 19:39:58,757 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:39:58,757 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1083708367] [2024-06-27 19:39:58,757 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:39:58,757 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:39:58,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:39:59,540 INFO 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 19:39:59,540 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:39:59,540 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1083708367] [2024-06-27 19:39:59,540 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1083708367] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:39:59,540 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:39:59,540 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 19:39:59,540 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1497870299] [2024-06-27 19:39:59,541 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:39:59,541 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 19:39:59,541 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:39:59,541 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 19:39:59,542 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-27 19:39:59,590 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 43 [2024-06-27 19:39:59,591 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 396 places, 570 transitions, 8201 flow. Second operand has 9 states, 9 states have (on average 8.777777777777779) internal successors, (79), 9 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:39:59,591 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:39:59,591 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 43 [2024-06-27 19:39:59,591 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:40:02,154 INFO L124 PetriNetUnfolderBase]: 6125/9149 cut-off events. [2024-06-27 19:40:02,154 INFO L125 PetriNetUnfolderBase]: For 1448063/1448069 co-relation queries the response was YES. [2024-06-27 19:40:02,251 INFO L83 FinitePrefix]: Finished finitePrefix Result has 89667 conditions, 9149 events. 6125/9149 cut-off events. For 1448063/1448069 co-relation queries the response was YES. Maximal size of possible extension queue 472. Compared 51895 event pairs, 1386 based on Foata normal form. 14/9159 useless extension candidates. Maximal degree in co-relation 89482. Up to 8022 conditions per place. [2024-06-27 19:40:02,291 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 455 selfloop transitions, 144 changer transitions 0/602 dead transitions. [2024-06-27 19:40:02,291 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 403 places, 602 transitions, 10113 flow [2024-06-27 19:40:02,292 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:40:02,292 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:40:02,292 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 138 transitions. [2024-06-27 19:40:02,292 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4011627906976744 [2024-06-27 19:40:02,292 INFO L175 Difference]: Start difference. First operand has 396 places, 570 transitions, 8201 flow. Second operand 8 states and 138 transitions. [2024-06-27 19:40:02,293 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 403 places, 602 transitions, 10113 flow [2024-06-27 19:40:08,709 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 397 places, 602 transitions, 9891 flow, removed 80 selfloop flow, removed 6 redundant places. [2024-06-27 19:40:08,716 INFO L231 Difference]: Finished difference. Result has 398 places, 576 transitions, 8463 flow [2024-06-27 19:40:08,716 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=7979, PETRI_DIFFERENCE_MINUEND_PLACES=390, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=570, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=141, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=429, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=8463, PETRI_PLACES=398, PETRI_TRANSITIONS=576} [2024-06-27 19:40:08,717 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 354 predicate places. [2024-06-27 19:40:08,717 INFO L495 AbstractCegarLoop]: Abstraction has has 398 places, 576 transitions, 8463 flow [2024-06-27 19:40:08,717 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.777777777777779) internal successors, (79), 9 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:40:08,717 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:40:08,717 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:40:08,717 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable109 [2024-06-27 19:40:08,717 INFO L420 AbstractCegarLoop]: === Iteration 111 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:40:08,718 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:40:08,718 INFO L85 PathProgramCache]: Analyzing trace with hash 1165662437, now seen corresponding path program 3 times [2024-06-27 19:40:08,718 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:40:08,718 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [554576968] [2024-06-27 19:40:08,718 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:40:08,718 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:40:08,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:40:09,634 INFO 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 19:40:09,634 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:40:09,635 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [554576968] [2024-06-27 19:40:09,635 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [554576968] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:40:09,635 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:40:09,635 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 19:40:09,635 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [506515719] [2024-06-27 19:40:09,635 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:40:09,635 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 19:40:09,635 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:40:09,635 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 19:40:09,635 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-27 19:40:09,681 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 43 [2024-06-27 19:40:09,681 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 398 places, 576 transitions, 8463 flow. Second operand has 10 states, 10 states have (on average 8.6) internal successors, (86), 10 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:40:09,681 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:40:09,681 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 43 [2024-06-27 19:40:09,681 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:40:12,285 INFO L124 PetriNetUnfolderBase]: 6241/9310 cut-off events. [2024-06-27 19:40:12,285 INFO L125 PetriNetUnfolderBase]: For 1524800/1524809 co-relation queries the response was YES. [2024-06-27 19:40:12,401 INFO L83 FinitePrefix]: Finished finitePrefix Result has 93352 conditions, 9310 events. 6241/9310 cut-off events. For 1524800/1524809 co-relation queries the response was YES. Maximal size of possible extension queue 483. Compared 52854 event pairs, 1555 based on Foata normal form. 10/9315 useless extension candidates. Maximal degree in co-relation 93166. Up to 8708 conditions per place. [2024-06-27 19:40:12,445 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 507 selfloop transitions, 102 changer transitions 0/612 dead transitions. [2024-06-27 19:40:12,445 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 406 places, 612 transitions, 10523 flow [2024-06-27 19:40:12,446 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 19:40:12,446 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 19:40:12,446 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 147 transitions. [2024-06-27 19:40:12,446 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3798449612403101 [2024-06-27 19:40:12,446 INFO L175 Difference]: Start difference. First operand has 398 places, 576 transitions, 8463 flow. Second operand 9 states and 147 transitions. [2024-06-27 19:40:12,447 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 406 places, 612 transitions, 10523 flow [2024-06-27 19:40:17,633 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 400 places, 612 transitions, 10087 flow, removed 87 selfloop flow, removed 6 redundant places. [2024-06-27 19:40:17,641 INFO L231 Difference]: Finished difference. Result has 401 places, 586 transitions, 8521 flow [2024-06-27 19:40:17,641 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=8027, PETRI_DIFFERENCE_MINUEND_PLACES=392, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=576, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=96, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=480, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8521, PETRI_PLACES=401, PETRI_TRANSITIONS=586} [2024-06-27 19:40:17,641 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 357 predicate places. [2024-06-27 19:40:17,641 INFO L495 AbstractCegarLoop]: Abstraction has has 401 places, 586 transitions, 8521 flow [2024-06-27 19:40:17,641 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.6) internal successors, (86), 10 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:40:17,642 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:40:17,642 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:40:17,642 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable110 [2024-06-27 19:40:17,642 INFO L420 AbstractCegarLoop]: === Iteration 112 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:40:17,642 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:40:17,642 INFO L85 PathProgramCache]: Analyzing trace with hash -112778929, now seen corresponding path program 9 times [2024-06-27 19:40:17,642 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:40:17,642 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [202034820] [2024-06-27 19:40:17,643 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:40:17,643 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:40:17,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:40:18,329 INFO 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 19:40:18,329 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:40:18,329 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [202034820] [2024-06-27 19:40:18,329 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [202034820] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:40:18,329 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:40:18,329 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 19:40:18,329 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [578766423] [2024-06-27 19:40:18,330 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:40:18,330 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 19:40:18,330 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:40:18,330 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 19:40:18,330 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-27 19:40:18,387 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 43 [2024-06-27 19:40:18,388 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 401 places, 586 transitions, 8521 flow. Second operand has 10 states, 10 states have (on average 8.6) internal successors, (86), 10 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:40:18,388 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:40:18,388 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 43 [2024-06-27 19:40:18,388 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:40:21,036 INFO L124 PetriNetUnfolderBase]: 6329/9435 cut-off events. [2024-06-27 19:40:21,037 INFO L125 PetriNetUnfolderBase]: For 1608274/1608279 co-relation queries the response was YES. [2024-06-27 19:40:21,161 INFO L83 FinitePrefix]: Finished finitePrefix Result has 95517 conditions, 9435 events. 6329/9435 cut-off events. For 1608274/1608279 co-relation queries the response was YES. Maximal size of possible extension queue 491. Compared 53464 event pairs, 1380 based on Foata normal form. 10/9439 useless extension candidates. Maximal degree in co-relation 95331. Up to 8480 conditions per place. [2024-06-27 19:40:21,209 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 507 selfloop transitions, 107 changer transitions 0/617 dead transitions. [2024-06-27 19:40:21,209 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 408 places, 617 transitions, 10335 flow [2024-06-27 19:40:21,210 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:40:21,210 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:40:21,210 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 137 transitions. [2024-06-27 19:40:21,210 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39825581395348836 [2024-06-27 19:40:21,210 INFO L175 Difference]: Start difference. First operand has 401 places, 586 transitions, 8521 flow. Second operand 8 states and 137 transitions. [2024-06-27 19:40:21,210 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 408 places, 617 transitions, 10335 flow [2024-06-27 19:40:27,227 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 404 places, 617 transitions, 10118 flow, removed 68 selfloop flow, removed 4 redundant places. [2024-06-27 19:40:27,234 INFO L231 Difference]: Finished difference. Result has 405 places, 593 transitions, 8762 flow [2024-06-27 19:40:27,234 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=8304, PETRI_DIFFERENCE_MINUEND_PLACES=397, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=586, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=103, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=482, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=8762, PETRI_PLACES=405, PETRI_TRANSITIONS=593} [2024-06-27 19:40:27,234 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 361 predicate places. [2024-06-27 19:40:27,234 INFO L495 AbstractCegarLoop]: Abstraction has has 405 places, 593 transitions, 8762 flow [2024-06-27 19:40:27,235 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.6) internal successors, (86), 10 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:40:27,235 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:40:27,235 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:40:27,235 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable111 [2024-06-27 19:40:27,235 INFO L420 AbstractCegarLoop]: === Iteration 113 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:40:27,235 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:40:27,235 INFO L85 PathProgramCache]: Analyzing trace with hash 326085733, now seen corresponding path program 4 times [2024-06-27 19:40:27,235 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:40:27,235 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [24883561] [2024-06-27 19:40:27,236 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:40:27,236 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:40:27,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:40:27,999 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:40:27,999 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:40:27,999 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [24883561] [2024-06-27 19:40:28,000 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [24883561] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:40:28,000 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:40:28,000 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 19:40:28,000 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [341358160] [2024-06-27 19:40:28,000 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:40:28,000 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 19:40:28,000 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:40:28,000 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 19:40:28,000 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-27 19:40:28,111 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 43 [2024-06-27 19:40:28,111 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 405 places, 593 transitions, 8762 flow. Second operand has 10 states, 10 states have (on average 8.6) internal successors, (86), 10 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:40:28,111 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:40:28,111 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 43 [2024-06-27 19:40:28,111 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:40:30,685 INFO L124 PetriNetUnfolderBase]: 6337/9444 cut-off events. [2024-06-27 19:40:30,685 INFO L125 PetriNetUnfolderBase]: For 1621041/1621050 co-relation queries the response was YES. [2024-06-27 19:40:30,839 INFO L83 FinitePrefix]: Finished finitePrefix Result has 96167 conditions, 9444 events. 6337/9444 cut-off events. For 1621041/1621050 co-relation queries the response was YES. Maximal size of possible extension queue 492. Compared 53646 event pairs, 1577 based on Foata normal form. 14/9453 useless extension candidates. Maximal degree in co-relation 95979. Up to 8908 conditions per place. [2024-06-27 19:40:30,888 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 521 selfloop transitions, 100 changer transitions 0/624 dead transitions. [2024-06-27 19:40:30,888 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 414 places, 624 transitions, 10482 flow [2024-06-27 19:40:30,889 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 19:40:30,889 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 19:40:30,889 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 158 transitions. [2024-06-27 19:40:30,889 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3674418604651163 [2024-06-27 19:40:30,889 INFO L175 Difference]: Start difference. First operand has 405 places, 593 transitions, 8762 flow. Second operand 10 states and 158 transitions. [2024-06-27 19:40:30,889 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 414 places, 624 transitions, 10482 flow [2024-06-27 19:40:36,538 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 410 places, 624 transitions, 10211 flow, removed 95 selfloop flow, removed 4 redundant places. [2024-06-27 19:40:36,573 INFO L231 Difference]: Finished difference. Result has 412 places, 596 transitions, 8799 flow [2024-06-27 19:40:36,573 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=8491, PETRI_DIFFERENCE_MINUEND_PLACES=401, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=593, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=97, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=493, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=8799, PETRI_PLACES=412, PETRI_TRANSITIONS=596} [2024-06-27 19:40:36,574 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 368 predicate places. [2024-06-27 19:40:36,574 INFO L495 AbstractCegarLoop]: Abstraction has has 412 places, 596 transitions, 8799 flow [2024-06-27 19:40:36,574 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.6) internal successors, (86), 10 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:40:36,574 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:40:36,574 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:40:36,574 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable112 [2024-06-27 19:40:36,574 INFO L420 AbstractCegarLoop]: === Iteration 114 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:40:36,575 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:40:36,575 INFO L85 PathProgramCache]: Analyzing trace with hash -1061806291, now seen corresponding path program 10 times [2024-06-27 19:40:36,575 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:40:36,575 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1625137618] [2024-06-27 19:40:36,575 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:40:36,575 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:40:36,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:40:37,309 INFO 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 19:40:37,310 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:40:37,310 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1625137618] [2024-06-27 19:40:37,310 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1625137618] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:40:37,310 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:40:37,310 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 19:40:37,310 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1839461888] [2024-06-27 19:40:37,310 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:40:37,311 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 19:40:37,311 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:40:37,311 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 19:40:37,311 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-27 19:40:37,367 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 43 [2024-06-27 19:40:37,368 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 412 places, 596 transitions, 8799 flow. Second operand has 10 states, 10 states have (on average 8.6) internal successors, (86), 10 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:40:37,368 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:40:37,368 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 43 [2024-06-27 19:40:37,368 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:40:39,933 INFO L124 PetriNetUnfolderBase]: 6377/9508 cut-off events. [2024-06-27 19:40:39,933 INFO L125 PetriNetUnfolderBase]: For 1654571/1654578 co-relation queries the response was YES. [2024-06-27 19:40:40,115 INFO L83 FinitePrefix]: Finished finitePrefix Result has 96895 conditions, 9508 events. 6377/9508 cut-off events. For 1654571/1654578 co-relation queries the response was YES. Maximal size of possible extension queue 496. Compared 54016 event pairs, 1389 based on Foata normal form. 10/9512 useless extension candidates. Maximal degree in co-relation 96704. Up to 8007 conditions per place. [2024-06-27 19:40:40,164 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 466 selfloop transitions, 159 changer transitions 0/628 dead transitions. [2024-06-27 19:40:40,165 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 419 places, 628 transitions, 10909 flow [2024-06-27 19:40:40,165 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:40:40,165 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:40:40,165 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 139 transitions. [2024-06-27 19:40:40,166 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40406976744186046 [2024-06-27 19:40:40,166 INFO L175 Difference]: Start difference. First operand has 412 places, 596 transitions, 8799 flow. Second operand 8 states and 139 transitions. [2024-06-27 19:40:40,166 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 419 places, 628 transitions, 10909 flow [2024-06-27 19:40:46,470 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 413 places, 628 transitions, 10731 flow, removed 11 selfloop flow, removed 6 redundant places. [2024-06-27 19:40:46,477 INFO L231 Difference]: Finished difference. Result has 414 places, 603 transitions, 9197 flow [2024-06-27 19:40:46,478 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=8621, PETRI_DIFFERENCE_MINUEND_PLACES=406, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=596, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=155, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=440, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=9197, PETRI_PLACES=414, PETRI_TRANSITIONS=603} [2024-06-27 19:40:46,478 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 370 predicate places. [2024-06-27 19:40:46,478 INFO L495 AbstractCegarLoop]: Abstraction has has 414 places, 603 transitions, 9197 flow [2024-06-27 19:40:46,478 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.6) internal successors, (86), 10 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:40:46,478 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:40:46,478 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:40:46,479 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable113 [2024-06-27 19:40:46,479 INFO L420 AbstractCegarLoop]: === Iteration 115 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:40:46,479 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:40:46,479 INFO L85 PathProgramCache]: Analyzing trace with hash 304435975, now seen corresponding path program 10 times [2024-06-27 19:40:46,479 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:40:46,480 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [24728926] [2024-06-27 19:40:46,480 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:40:46,480 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:40:46,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:40:47,215 INFO 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 19:40:47,216 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:40:47,216 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [24728926] [2024-06-27 19:40:47,216 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [24728926] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:40:47,216 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:40:47,216 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 19:40:47,216 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [548719854] [2024-06-27 19:40:47,216 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:40:47,217 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 19:40:47,217 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:40:47,217 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 19:40:47,217 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-27 19:40:47,250 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 43 [2024-06-27 19:40:47,250 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 414 places, 603 transitions, 9197 flow. Second operand has 9 states, 9 states have (on average 8.777777777777779) internal successors, (79), 9 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:40:47,250 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:40:47,250 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 43 [2024-06-27 19:40:47,251 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:40:49,990 INFO L124 PetriNetUnfolderBase]: 6481/9647 cut-off events. [2024-06-27 19:40:49,991 INFO L125 PetriNetUnfolderBase]: For 1739129/1739140 co-relation queries the response was YES. [2024-06-27 19:40:50,110 INFO L83 FinitePrefix]: Finished finitePrefix Result has 100607 conditions, 9647 events. 6481/9647 cut-off events. For 1739129/1739140 co-relation queries the response was YES. Maximal size of possible extension queue 506. Compared 54846 event pairs, 1447 based on Foata normal form. 14/9656 useless extension candidates. Maximal degree in co-relation 100415. Up to 8025 conditions per place. [2024-06-27 19:40:50,154 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 452 selfloop transitions, 187 changer transitions 0/642 dead transitions. [2024-06-27 19:40:50,154 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 421 places, 642 transitions, 11669 flow [2024-06-27 19:40:50,155 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:40:50,155 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:40:50,155 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 142 transitions. [2024-06-27 19:40:50,156 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4127906976744186 [2024-06-27 19:40:50,156 INFO L175 Difference]: Start difference. First operand has 414 places, 603 transitions, 9197 flow. Second operand 8 states and 142 transitions. [2024-06-27 19:40:50,156 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 421 places, 642 transitions, 11669 flow [2024-06-27 19:40:56,184 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 416 places, 642 transitions, 11276 flow, removed 83 selfloop flow, removed 5 redundant places. [2024-06-27 19:40:56,192 INFO L231 Difference]: Finished difference. Result has 418 places, 614 transitions, 9591 flow [2024-06-27 19:40:56,192 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=8810, PETRI_DIFFERENCE_MINUEND_PLACES=409, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=603, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=179, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=423, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=9591, PETRI_PLACES=418, PETRI_TRANSITIONS=614} [2024-06-27 19:40:56,192 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 374 predicate places. [2024-06-27 19:40:56,192 INFO L495 AbstractCegarLoop]: Abstraction has has 418 places, 614 transitions, 9591 flow [2024-06-27 19:40:56,192 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.777777777777779) internal successors, (79), 9 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:40:56,193 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:40:56,193 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:40:56,193 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable114 [2024-06-27 19:40:56,193 INFO L420 AbstractCegarLoop]: === Iteration 116 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:40:56,193 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:40:56,193 INFO L85 PathProgramCache]: Analyzing trace with hash -1684974065, now seen corresponding path program 5 times [2024-06-27 19:40:56,193 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:40:56,193 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [753146213] [2024-06-27 19:40:56,194 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:40:56,194 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:40:56,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:40:56,949 INFO 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 19:40:56,950 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:40:56,950 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [753146213] [2024-06-27 19:40:56,950 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [753146213] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:40:56,950 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:40:56,950 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 19:40:56,950 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1817509998] [2024-06-27 19:40:56,950 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:40:56,951 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 19:40:56,951 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:40:56,951 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 19:40:56,951 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-27 19:40:57,048 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 43 [2024-06-27 19:40:57,048 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 418 places, 614 transitions, 9591 flow. Second operand has 10 states, 10 states have (on average 8.6) internal successors, (86), 10 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:40:57,048 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:40:57,049 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 43 [2024-06-27 19:40:57,049 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:41:00,058 INFO L124 PetriNetUnfolderBase]: 6625/9843 cut-off events. [2024-06-27 19:41:00,058 INFO L125 PetriNetUnfolderBase]: For 1856122/1856124 co-relation queries the response was YES. [2024-06-27 19:41:00,203 INFO L83 FinitePrefix]: Finished finitePrefix Result has 103937 conditions, 9843 events. 6625/9843 cut-off events. For 1856122/1856124 co-relation queries the response was YES. Maximal size of possible extension queue 515. Compared 56000 event pairs, 1704 based on Foata normal form. 18/9859 useless extension candidates. Maximal degree in co-relation 103743. Up to 9515 conditions per place. [2024-06-27 19:41:00,254 INFO L140 encePairwiseOnDemand]: 29/43 looper letters, 574 selfloop transitions, 78 changer transitions 0/655 dead transitions. [2024-06-27 19:41:00,255 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 428 places, 655 transitions, 11803 flow [2024-06-27 19:41:00,255 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-27 19:41:00,255 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-27 19:41:00,256 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 179 transitions. [2024-06-27 19:41:00,256 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3784355179704017 [2024-06-27 19:41:00,256 INFO L175 Difference]: Start difference. First operand has 418 places, 614 transitions, 9591 flow. Second operand 11 states and 179 transitions. [2024-06-27 19:41:00,256 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 428 places, 655 transitions, 11803 flow [2024-06-27 19:41:07,268 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 425 places, 655 transitions, 11457 flow, removed 91 selfloop flow, removed 3 redundant places. [2024-06-27 19:41:07,276 INFO L231 Difference]: Finished difference. Result has 426 places, 623 transitions, 9708 flow [2024-06-27 19:41:07,276 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=9245, PETRI_DIFFERENCE_MINUEND_PLACES=415, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=614, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=73, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=540, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=9708, PETRI_PLACES=426, PETRI_TRANSITIONS=623} [2024-06-27 19:41:07,277 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 382 predicate places. [2024-06-27 19:41:07,277 INFO L495 AbstractCegarLoop]: Abstraction has has 426 places, 623 transitions, 9708 flow [2024-06-27 19:41:07,277 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.6) internal successors, (86), 10 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:41:07,277 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:41:07,277 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:41:07,277 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable115 [2024-06-27 19:41:07,277 INFO L420 AbstractCegarLoop]: === Iteration 117 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:41:07,278 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:41:07,278 INFO L85 PathProgramCache]: Analyzing trace with hash -1053228467, now seen corresponding path program 11 times [2024-06-27 19:41:07,278 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:41:07,278 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [400671514] [2024-06-27 19:41:07,278 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:41:07,278 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:41:07,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:41:08,315 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:41:08,315 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:41:08,315 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [400671514] [2024-06-27 19:41:08,315 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [400671514] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:41:08,315 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:41:08,315 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 19:41:08,315 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [830887852] [2024-06-27 19:41:08,315 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:41:08,316 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 19:41:08,316 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:41:08,316 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 19:41:08,316 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-27 19:41:08,370 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 43 [2024-06-27 19:41:08,370 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 426 places, 623 transitions, 9708 flow. Second operand has 10 states, 10 states have (on average 8.6) internal successors, (86), 10 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:41:08,370 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:41:08,370 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 43 [2024-06-27 19:41:08,370 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:41:11,575 INFO L124 PetriNetUnfolderBase]: 6665/9899 cut-off events. [2024-06-27 19:41:11,576 INFO L125 PetriNetUnfolderBase]: For 1839528/1839530 co-relation queries the response was YES. [2024-06-27 19:41:11,688 INFO L83 FinitePrefix]: Finished finitePrefix Result has 105013 conditions, 9899 events. 6665/9899 cut-off events. For 1839528/1839530 co-relation queries the response was YES. Maximal size of possible extension queue 519. Compared 56403 event pairs, 1738 based on Foata normal form. 10/9907 useless extension candidates. Maximal degree in co-relation 104817. Up to 9773 conditions per place. [2024-06-27 19:41:11,732 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 615 selfloop transitions, 32 changer transitions 0/650 dead transitions. [2024-06-27 19:41:11,732 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 434 places, 650 transitions, 11499 flow [2024-06-27 19:41:11,733 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 19:41:11,733 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 19:41:11,733 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 137 transitions. [2024-06-27 19:41:11,733 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.35400516795865633 [2024-06-27 19:41:11,733 INFO L175 Difference]: Start difference. First operand has 426 places, 623 transitions, 9708 flow. Second operand 9 states and 137 transitions. [2024-06-27 19:41:11,733 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 434 places, 650 transitions, 11499 flow [2024-06-27 19:41:19,620 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 427 places, 650 transitions, 11215 flow, removed 100 selfloop flow, removed 7 redundant places. [2024-06-27 19:41:19,627 INFO L231 Difference]: Finished difference. Result has 429 places, 629 transitions, 9683 flow [2024-06-27 19:41:19,628 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=9424, PETRI_DIFFERENCE_MINUEND_PLACES=419, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=623, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=591, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=9683, PETRI_PLACES=429, PETRI_TRANSITIONS=629} [2024-06-27 19:41:19,628 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 385 predicate places. [2024-06-27 19:41:19,628 INFO L495 AbstractCegarLoop]: Abstraction has has 429 places, 629 transitions, 9683 flow [2024-06-27 19:41:19,628 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.6) internal successors, (86), 10 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:41:19,628 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:41:19,628 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:41:19,628 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable116 [2024-06-27 19:41:19,629 INFO L420 AbstractCegarLoop]: === Iteration 118 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:41:19,629 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:41:19,629 INFO L85 PathProgramCache]: Analyzing trace with hash 1117230031, now seen corresponding path program 11 times [2024-06-27 19:41:19,629 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:41:19,629 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1540751825] [2024-06-27 19:41:19,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:41:19,629 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:41:19,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:41:20,460 INFO 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 19:41:20,461 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:41:20,461 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1540751825] [2024-06-27 19:41:20,461 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1540751825] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:41:20,461 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:41:20,461 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 19:41:20,461 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [692869485] [2024-06-27 19:41:20,461 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:41:20,461 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 19:41:20,461 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:41:20,462 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 19:41:20,462 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-27 19:41:20,522 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 43 [2024-06-27 19:41:20,523 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 429 places, 629 transitions, 9683 flow. Second operand has 10 states, 10 states have (on average 8.6) internal successors, (86), 10 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:41:20,523 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:41:20,523 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 43 [2024-06-27 19:41:20,523 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:41:23,944 INFO L124 PetriNetUnfolderBase]: 6737/10007 cut-off events. [2024-06-27 19:41:23,945 INFO L125 PetriNetUnfolderBase]: For 1896077/1896081 co-relation queries the response was YES. [2024-06-27 19:41:24,069 INFO L83 FinitePrefix]: Finished finitePrefix Result has 105923 conditions, 10007 events. 6737/10007 cut-off events. For 1896077/1896081 co-relation queries the response was YES. Maximal size of possible extension queue 527. Compared 56923 event pairs, 1453 based on Foata normal form. 10/10012 useless extension candidates. Maximal degree in co-relation 105724. Up to 8455 conditions per place. [2024-06-27 19:41:24,121 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 493 selfloop transitions, 166 changer transitions 0/662 dead transitions. [2024-06-27 19:41:24,121 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 436 places, 662 transitions, 11863 flow [2024-06-27 19:41:24,122 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:41:24,122 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:41:24,122 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 141 transitions. [2024-06-27 19:41:24,122 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40988372093023256 [2024-06-27 19:41:24,122 INFO L175 Difference]: Start difference. First operand has 429 places, 629 transitions, 9683 flow. Second operand 8 states and 141 transitions. [2024-06-27 19:41:24,122 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 436 places, 662 transitions, 11863 flow [2024-06-27 19:41:30,649 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 429 places, 662 transitions, 11666 flow, removed 54 selfloop flow, removed 7 redundant places. [2024-06-27 19:41:30,656 INFO L231 Difference]: Finished difference. Result has 431 places, 637 transitions, 10096 flow [2024-06-27 19:41:30,656 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=9486, PETRI_DIFFERENCE_MINUEND_PLACES=422, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=629, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=158, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=470, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=10096, PETRI_PLACES=431, PETRI_TRANSITIONS=637} [2024-06-27 19:41:30,657 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 387 predicate places. [2024-06-27 19:41:30,657 INFO L495 AbstractCegarLoop]: Abstraction has has 431 places, 637 transitions, 10096 flow [2024-06-27 19:41:30,660 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.6) internal successors, (86), 10 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:41:30,660 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:41:30,660 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:41:30,660 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable117 [2024-06-27 19:41:30,661 INFO L420 AbstractCegarLoop]: === Iteration 119 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:41:30,661 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:41:30,661 INFO L85 PathProgramCache]: Analyzing trace with hash -1047060273, now seen corresponding path program 6 times [2024-06-27 19:41:30,661 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:41:30,661 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [368158472] [2024-06-27 19:41:30,661 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:41:30,661 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:41:30,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:41:31,526 INFO 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 19:41:31,526 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:41:31,527 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [368158472] [2024-06-27 19:41:31,527 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [368158472] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:41:31,527 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:41:31,527 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 19:41:31,527 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1487421740] [2024-06-27 19:41:31,527 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:41:31,527 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 19:41:31,527 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:41:31,528 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 19:41:31,528 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-27 19:41:31,620 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 43 [2024-06-27 19:41:31,621 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 431 places, 637 transitions, 10096 flow. Second operand has 10 states, 10 states have (on average 8.6) internal successors, (86), 10 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:41:31,621 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:41:31,621 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 43 [2024-06-27 19:41:31,621 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:41:35,367 INFO L124 PetriNetUnfolderBase]: 6893/10219 cut-off events. [2024-06-27 19:41:35,367 INFO L125 PetriNetUnfolderBase]: For 1989177/1989188 co-relation queries the response was YES. [2024-06-27 19:41:35,488 INFO L83 FinitePrefix]: Finished finitePrefix Result has 110025 conditions, 10219 events. 6893/10219 cut-off events. For 1989177/1989188 co-relation queries the response was YES. Maximal size of possible extension queue 546. Compared 58237 event pairs, 1609 based on Foata normal form. 10/10224 useless extension candidates. Maximal degree in co-relation 109825. Up to 8753 conditions per place. [2024-06-27 19:41:35,535 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 498 selfloop transitions, 205 changer transitions 0/706 dead transitions. [2024-06-27 19:41:35,535 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 439 places, 706 transitions, 13325 flow [2024-06-27 19:41:35,536 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 19:41:35,536 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 19:41:35,536 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 155 transitions. [2024-06-27 19:41:35,537 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4005167958656331 [2024-06-27 19:41:35,537 INFO L175 Difference]: Start difference. First operand has 431 places, 637 transitions, 10096 flow. Second operand 9 states and 155 transitions. [2024-06-27 19:41:35,537 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 439 places, 706 transitions, 13325 flow [2024-06-27 19:41:44,429 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 435 places, 706 transitions, 12988 flow, removed 65 selfloop flow, removed 4 redundant places. [2024-06-27 19:41:44,437 INFO L231 Difference]: Finished difference. Result has 439 places, 677 transitions, 11136 flow [2024-06-27 19:41:44,438 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=9763, PETRI_DIFFERENCE_MINUEND_PLACES=427, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=637, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=171, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=451, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=11136, PETRI_PLACES=439, PETRI_TRANSITIONS=677} [2024-06-27 19:41:44,438 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 395 predicate places. [2024-06-27 19:41:44,438 INFO L495 AbstractCegarLoop]: Abstraction has has 439 places, 677 transitions, 11136 flow [2024-06-27 19:41:44,438 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.6) internal successors, (86), 10 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:41:44,438 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:41:44,438 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:41:44,438 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable118 [2024-06-27 19:41:44,438 INFO L420 AbstractCegarLoop]: === Iteration 120 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:41:44,439 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:41:44,439 INFO L85 PathProgramCache]: Analyzing trace with hash 1121694031, now seen corresponding path program 12 times [2024-06-27 19:41:44,439 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:41:44,439 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1693848237] [2024-06-27 19:41:44,439 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:41:44,439 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:41:44,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:41:45,385 INFO 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 19:41:45,385 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:41:45,385 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1693848237] [2024-06-27 19:41:45,385 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1693848237] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:41:45,385 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:41:45,385 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 19:41:45,386 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [706537831] [2024-06-27 19:41:45,386 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:41:45,386 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 19:41:45,386 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:41:45,386 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 19:41:45,386 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-27 19:41:45,483 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 43 [2024-06-27 19:41:45,483 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 439 places, 677 transitions, 11136 flow. Second operand has 10 states, 10 states have (on average 8.6) internal successors, (86), 10 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:41:45,483 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:41:45,483 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 43 [2024-06-27 19:41:45,483 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:41:48,770 INFO L124 PetriNetUnfolderBase]: 6869/10187 cut-off events. [2024-06-27 19:41:48,770 INFO L125 PetriNetUnfolderBase]: For 2000003/2000008 co-relation queries the response was YES. [2024-06-27 19:41:49,015 INFO L83 FinitePrefix]: Finished finitePrefix Result has 110014 conditions, 10187 events. 6869/10187 cut-off events. For 2000003/2000008 co-relation queries the response was YES. Maximal size of possible extension queue 546. Compared 57954 event pairs, 1512 based on Foata normal form. 10/10191 useless extension candidates. Maximal degree in co-relation 109810. Up to 9884 conditions per place. [2024-06-27 19:41:49,058 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 632 selfloop transitions, 59 changer transitions 0/694 dead transitions. [2024-06-27 19:41:49,059 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 446 places, 694 transitions, 12604 flow [2024-06-27 19:41:49,059 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:41:49,059 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:41:49,060 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 128 transitions. [2024-06-27 19:41:49,060 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37209302325581395 [2024-06-27 19:41:49,060 INFO L175 Difference]: Start difference. First operand has 439 places, 677 transitions, 11136 flow. Second operand 8 states and 128 transitions. [2024-06-27 19:41:49,060 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 446 places, 694 transitions, 12604 flow [2024-06-27 19:41:57,601 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 444 places, 694 transitions, 12299 flow, removed 137 selfloop flow, removed 2 redundant places. [2024-06-27 19:41:57,609 INFO L231 Difference]: Finished difference. Result has 445 places, 677 transitions, 10957 flow [2024-06-27 19:41:57,609 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=10831, PETRI_DIFFERENCE_MINUEND_PLACES=437, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=677, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=59, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=618, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=10957, PETRI_PLACES=445, PETRI_TRANSITIONS=677} [2024-06-27 19:41:57,609 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 401 predicate places. [2024-06-27 19:41:57,609 INFO L495 AbstractCegarLoop]: Abstraction has has 445 places, 677 transitions, 10957 flow [2024-06-27 19:41:57,610 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.6) internal successors, (86), 10 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:41:57,610 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:41:57,610 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:41:57,610 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable119 [2024-06-27 19:41:57,610 INFO L420 AbstractCegarLoop]: === Iteration 121 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:41:57,610 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:41:57,610 INFO L85 PathProgramCache]: Analyzing trace with hash 1121878605, now seen corresponding path program 12 times [2024-06-27 19:41:57,611 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:41:57,611 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2028059379] [2024-06-27 19:41:57,611 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:41:57,611 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:41:57,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:41:58,580 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:41:58,581 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:41:58,581 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2028059379] [2024-06-27 19:41:58,581 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2028059379] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:41:58,581 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:41:58,581 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 19:41:58,581 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1157472416] [2024-06-27 19:41:58,582 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:41:58,582 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 19:41:58,582 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:41:58,582 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 19:41:58,582 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-27 19:41:58,637 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 43 [2024-06-27 19:41:58,637 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 445 places, 677 transitions, 10957 flow. Second operand has 9 states, 9 states have (on average 8.777777777777779) internal successors, (79), 9 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:41:58,637 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:41:58,637 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 43 [2024-06-27 19:41:58,637 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:42:02,073 INFO L124 PetriNetUnfolderBase]: 6873/10193 cut-off events. [2024-06-27 19:42:02,074 INFO L125 PetriNetUnfolderBase]: For 1996139/1996150 co-relation queries the response was YES. [2024-06-27 19:42:02,196 INFO L83 FinitePrefix]: Finished finitePrefix Result has 109552 conditions, 10193 events. 6873/10193 cut-off events. For 1996139/1996150 co-relation queries the response was YES. Maximal size of possible extension queue 545. Compared 58203 event pairs, 1542 based on Foata normal form. 10/10198 useless extension candidates. Maximal degree in co-relation 109346. Up to 9295 conditions per place. [2024-06-27 19:42:02,238 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 554 selfloop transitions, 154 changer transitions 0/711 dead transitions. [2024-06-27 19:42:02,238 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 452 places, 711 transitions, 12985 flow [2024-06-27 19:42:02,239 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:42:02,239 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:42:02,239 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 134 transitions. [2024-06-27 19:42:02,239 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38953488372093026 [2024-06-27 19:42:02,239 INFO L175 Difference]: Start difference. First operand has 445 places, 677 transitions, 10957 flow. Second operand 8 states and 134 transitions. [2024-06-27 19:42:02,239 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 452 places, 711 transitions, 12985 flow [2024-06-27 19:42:10,361 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 444 places, 711 transitions, 12753 flow, removed 11 selfloop flow, removed 8 redundant places. [2024-06-27 19:42:10,369 INFO L231 Difference]: Finished difference. Result has 446 places, 687 transitions, 11319 flow [2024-06-27 19:42:10,370 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=10725, PETRI_DIFFERENCE_MINUEND_PLACES=437, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=677, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=147, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=526, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=11319, PETRI_PLACES=446, PETRI_TRANSITIONS=687} [2024-06-27 19:42:10,370 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 402 predicate places. [2024-06-27 19:42:10,370 INFO L495 AbstractCegarLoop]: Abstraction has has 446 places, 687 transitions, 11319 flow [2024-06-27 19:42:10,370 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.777777777777779) internal successors, (79), 9 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:42:10,370 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:42:10,370 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:42:10,371 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable120 [2024-06-27 19:42:10,371 INFO L420 AbstractCegarLoop]: === Iteration 122 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:42:10,371 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:42:10,371 INFO L85 PathProgramCache]: Analyzing trace with hash -1841522315, now seen corresponding path program 7 times [2024-06-27 19:42:10,371 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:42:10,371 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1655609426] [2024-06-27 19:42:10,371 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:42:10,371 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:42:10,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:42:11,289 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:42:11,290 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:42:11,290 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1655609426] [2024-06-27 19:42:11,290 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1655609426] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:42:11,290 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:42:11,290 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 19:42:11,290 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1315457039] [2024-06-27 19:42:11,290 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:42:11,290 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 19:42:11,291 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:42:11,291 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 19:42:11,291 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-27 19:42:11,382 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 43 [2024-06-27 19:42:11,382 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 446 places, 687 transitions, 11319 flow. Second operand has 10 states, 10 states have (on average 8.6) internal successors, (86), 10 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:42:11,382 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:42:11,382 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 43 [2024-06-27 19:42:11,383 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:42:15,026 INFO L124 PetriNetUnfolderBase]: 7061/10453 cut-off events. [2024-06-27 19:42:15,027 INFO L125 PetriNetUnfolderBase]: For 2181827/2181838 co-relation queries the response was YES. [2024-06-27 19:42:15,168 INFO L83 FinitePrefix]: Finished finitePrefix Result has 114812 conditions, 10453 events. 7061/10453 cut-off events. For 2181827/2181838 co-relation queries the response was YES. Maximal size of possible extension queue 568. Compared 59808 event pairs, 1603 based on Foata normal form. 18/10466 useless extension candidates. Maximal degree in co-relation 114605. Up to 9111 conditions per place. [2024-06-27 19:42:15,216 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 511 selfloop transitions, 224 changer transitions 0/738 dead transitions. [2024-06-27 19:42:15,217 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 456 places, 738 transitions, 14215 flow [2024-06-27 19:42:15,217 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-27 19:42:15,217 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-27 19:42:15,217 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 179 transitions. [2024-06-27 19:42:15,218 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3784355179704017 [2024-06-27 19:42:15,218 INFO L175 Difference]: Start difference. First operand has 446 places, 687 transitions, 11319 flow. Second operand 11 states and 179 transitions. [2024-06-27 19:42:15,218 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 456 places, 738 transitions, 14215 flow [2024-06-27 19:42:25,228 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 454 places, 738 transitions, 14019 flow, removed 76 selfloop flow, removed 2 redundant places. [2024-06-27 19:42:25,237 INFO L231 Difference]: Finished difference. Result has 456 places, 704 transitions, 12144 flow [2024-06-27 19:42:25,238 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=11123, PETRI_DIFFERENCE_MINUEND_PLACES=444, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=687, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=213, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=472, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=12144, PETRI_PLACES=456, PETRI_TRANSITIONS=704} [2024-06-27 19:42:25,238 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 412 predicate places. [2024-06-27 19:42:25,238 INFO L495 AbstractCegarLoop]: Abstraction has has 456 places, 704 transitions, 12144 flow [2024-06-27 19:42:25,238 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.6) internal successors, (86), 10 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:42:25,238 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:42:25,238 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:42:25,238 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable121 [2024-06-27 19:42:25,239 INFO L420 AbstractCegarLoop]: === Iteration 123 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:42:25,239 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:42:25,239 INFO L85 PathProgramCache]: Analyzing trace with hash -1841701805, now seen corresponding path program 8 times [2024-06-27 19:42:25,239 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:42:25,239 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1858105532] [2024-06-27 19:42:25,239 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:42:25,239 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:42:25,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:42:26,137 INFO 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 19:42:26,137 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:42:26,137 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1858105532] [2024-06-27 19:42:26,137 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1858105532] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:42:26,137 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:42:26,137 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 19:42:26,137 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [725594070] [2024-06-27 19:42:26,137 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:42:26,138 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 19:42:26,138 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:42:26,138 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 19:42:26,138 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-27 19:42:26,181 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 43 [2024-06-27 19:42:26,181 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 456 places, 704 transitions, 12144 flow. Second operand has 10 states, 10 states have (on average 8.6) internal successors, (86), 10 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:42:26,181 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:42:26,182 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 43 [2024-06-27 19:42:26,182 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:42:29,971 INFO L124 PetriNetUnfolderBase]: 7069/10465 cut-off events. [2024-06-27 19:42:29,971 INFO L125 PetriNetUnfolderBase]: For 2169972/2169983 co-relation queries the response was YES. [2024-06-27 19:42:30,103 INFO L83 FinitePrefix]: Finished finitePrefix Result has 115839 conditions, 10465 events. 7069/10465 cut-off events. For 2169972/2169983 co-relation queries the response was YES. Maximal size of possible extension queue 570. Compared 59904 event pairs, 1594 based on Foata normal form. 14/10474 useless extension candidates. Maximal degree in co-relation 115629. Up to 9123 conditions per place. [2024-06-27 19:42:30,152 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 505 selfloop transitions, 230 changer transitions 0/738 dead transitions. [2024-06-27 19:42:30,153 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 465 places, 738 transitions, 14444 flow [2024-06-27 19:42:30,153 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 19:42:30,153 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 19:42:30,154 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 163 transitions. [2024-06-27 19:42:30,154 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37906976744186044 [2024-06-27 19:42:30,154 INFO L175 Difference]: Start difference. First operand has 456 places, 704 transitions, 12144 flow. Second operand 10 states and 163 transitions. [2024-06-27 19:42:30,154 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 465 places, 738 transitions, 14444 flow [2024-06-27 19:42:40,395 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 460 places, 738 transitions, 14094 flow, removed 94 selfloop flow, removed 5 redundant places. [2024-06-27 19:42:40,404 INFO L231 Difference]: Finished difference. Result has 462 places, 710 transitions, 12469 flow [2024-06-27 19:42:40,404 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=11814, PETRI_DIFFERENCE_MINUEND_PLACES=451, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=704, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=224, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=478, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=12469, PETRI_PLACES=462, PETRI_TRANSITIONS=710} [2024-06-27 19:42:40,405 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 418 predicate places. [2024-06-27 19:42:40,405 INFO L495 AbstractCegarLoop]: Abstraction has has 462 places, 710 transitions, 12469 flow [2024-06-27 19:42:40,405 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.6) internal successors, (86), 10 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:42:40,405 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:42:40,405 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:42:40,405 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable122 [2024-06-27 19:42:40,405 INFO L420 AbstractCegarLoop]: === Iteration 124 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:42:40,405 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:42:40,406 INFO L85 PathProgramCache]: Analyzing trace with hash 781390739, now seen corresponding path program 9 times [2024-06-27 19:42:40,406 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:42:40,406 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1042822250] [2024-06-27 19:42:40,406 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:42:40,406 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:42:40,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:42:41,222 INFO 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 19:42:41,223 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:42:41,223 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1042822250] [2024-06-27 19:42:41,223 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1042822250] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:42:41,223 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:42:41,223 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 19:42:41,223 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2127805486] [2024-06-27 19:42:41,223 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:42:41,223 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 19:42:41,223 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:42:41,223 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 19:42:41,223 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-27 19:42:41,303 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 43 [2024-06-27 19:42:41,304 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 462 places, 710 transitions, 12469 flow. Second operand has 10 states, 10 states have (on average 8.6) internal successors, (86), 10 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:42:41,304 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:42:41,304 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 43 [2024-06-27 19:42:41,304 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:42:44,993 INFO L124 PetriNetUnfolderBase]: 7121/10537 cut-off events. [2024-06-27 19:42:44,993 INFO L125 PetriNetUnfolderBase]: For 2210229/2210240 co-relation queries the response was YES. [2024-06-27 19:42:45,122 INFO L83 FinitePrefix]: Finished finitePrefix Result has 118029 conditions, 10537 events. 7121/10537 cut-off events. For 2210229/2210240 co-relation queries the response was YES. Maximal size of possible extension queue 579. Compared 60353 event pairs, 1594 based on Foata normal form. 10/10542 useless extension candidates. Maximal degree in co-relation 117816. Up to 8883 conditions per place. [2024-06-27 19:42:45,169 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 495 selfloop transitions, 248 changer transitions 0/746 dead transitions. [2024-06-27 19:42:45,169 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 470 places, 746 transitions, 15144 flow [2024-06-27 19:42:45,170 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 19:42:45,170 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 19:42:45,170 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 151 transitions. [2024-06-27 19:42:45,170 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39018087855297157 [2024-06-27 19:42:45,171 INFO L175 Difference]: Start difference. First operand has 462 places, 710 transitions, 12469 flow. Second operand 9 states and 151 transitions. [2024-06-27 19:42:45,171 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 470 places, 746 transitions, 15144 flow [2024-06-27 19:42:54,856 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 464 places, 746 transitions, 14671 flow, removed 60 selfloop flow, removed 6 redundant places. [2024-06-27 19:42:54,865 INFO L231 Difference]: Finished difference. Result has 466 places, 720 transitions, 12890 flow [2024-06-27 19:42:54,866 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=11996, PETRI_DIFFERENCE_MINUEND_PLACES=456, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=710, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=238, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=471, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=12890, PETRI_PLACES=466, PETRI_TRANSITIONS=720} [2024-06-27 19:42:54,866 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 422 predicate places. [2024-06-27 19:42:54,866 INFO L495 AbstractCegarLoop]: Abstraction has has 466 places, 720 transitions, 12890 flow [2024-06-27 19:42:54,866 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.6) internal successors, (86), 10 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:42:54,866 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:42:54,866 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:42:54,867 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable123 [2024-06-27 19:42:54,867 INFO L420 AbstractCegarLoop]: === Iteration 125 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:42:54,867 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:42:54,867 INFO L85 PathProgramCache]: Analyzing trace with hash -1891835825, now seen corresponding path program 10 times [2024-06-27 19:42:54,867 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:42:54,867 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [346002926] [2024-06-27 19:42:54,867 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:42:54,867 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:42:54,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:42:55,656 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:42:55,656 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:42:55,656 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [346002926] [2024-06-27 19:42:55,656 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [346002926] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:42:55,656 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:42:55,656 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 19:42:55,657 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1049643768] [2024-06-27 19:42:55,657 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:42:55,657 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 19:42:55,657 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:42:55,657 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 19:42:55,657 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-27 19:42:55,716 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 43 [2024-06-27 19:42:55,717 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 466 places, 720 transitions, 12890 flow. Second operand has 10 states, 10 states have (on average 8.6) internal successors, (86), 10 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:42:55,717 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:42:55,717 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 43 [2024-06-27 19:42:55,717 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:42:59,658 INFO L124 PetriNetUnfolderBase]: 7109/10521 cut-off events. [2024-06-27 19:42:59,658 INFO L125 PetriNetUnfolderBase]: For 2224044/2224055 co-relation queries the response was YES. [2024-06-27 19:42:59,810 INFO L83 FinitePrefix]: Finished finitePrefix Result has 117830 conditions, 10521 events. 7109/10521 cut-off events. For 2224044/2224055 co-relation queries the response was YES. Maximal size of possible extension queue 578. Compared 60345 event pairs, 1583 based on Foata normal form. 10/10526 useless extension candidates. Maximal degree in co-relation 117615. Up to 8879 conditions per place. [2024-06-27 19:42:59,858 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 492 selfloop transitions, 250 changer transitions 0/745 dead transitions. [2024-06-27 19:42:59,858 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 474 places, 745 transitions, 15012 flow [2024-06-27 19:42:59,859 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 19:42:59,859 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 19:42:59,859 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 149 transitions. [2024-06-27 19:42:59,860 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3850129198966408 [2024-06-27 19:42:59,860 INFO L175 Difference]: Start difference. First operand has 466 places, 720 transitions, 12890 flow. Second operand 9 states and 149 transitions. [2024-06-27 19:42:59,860 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 474 places, 745 transitions, 15012 flow [2024-06-27 19:43:09,276 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 470 places, 745 transitions, 14538 flow, removed 99 selfloop flow, removed 4 redundant places. [2024-06-27 19:43:09,285 INFO L231 Difference]: Finished difference. Result has 471 places, 720 transitions, 12922 flow [2024-06-27 19:43:09,286 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=12416, PETRI_DIFFERENCE_MINUEND_PLACES=462, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=720, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=250, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=470, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=12922, PETRI_PLACES=471, PETRI_TRANSITIONS=720} [2024-06-27 19:43:09,286 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 427 predicate places. [2024-06-27 19:43:09,286 INFO L495 AbstractCegarLoop]: Abstraction has has 471 places, 720 transitions, 12922 flow [2024-06-27 19:43:09,286 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.6) internal successors, (86), 10 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:43:09,286 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:43:09,286 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:43:09,287 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable124 [2024-06-27 19:43:09,287 INFO L420 AbstractCegarLoop]: === Iteration 126 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:43:09,287 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:43:09,287 INFO L85 PathProgramCache]: Analyzing trace with hash 988044179, now seen corresponding path program 11 times [2024-06-27 19:43:09,287 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:43:09,288 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1444179480] [2024-06-27 19:43:09,288 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:43:09,288 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:43:09,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:43:10,058 INFO 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 19:43:10,059 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:43:10,059 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1444179480] [2024-06-27 19:43:10,059 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1444179480] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:43:10,059 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:43:10,059 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 19:43:10,059 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1139158004] [2024-06-27 19:43:10,059 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:43:10,059 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 19:43:10,059 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:43:10,059 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 19:43:10,059 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-27 19:43:10,184 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 43 [2024-06-27 19:43:10,184 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 471 places, 720 transitions, 12922 flow. Second operand has 10 states, 10 states have (on average 8.6) internal successors, (86), 10 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:43:10,184 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:43:10,184 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 43 [2024-06-27 19:43:10,184 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:43:14,082 INFO L124 PetriNetUnfolderBase]: 7255/10723 cut-off events. [2024-06-27 19:43:14,082 INFO L125 PetriNetUnfolderBase]: For 2336894/2336905 co-relation queries the response was YES. [2024-06-27 19:43:14,237 INFO L83 FinitePrefix]: Finished finitePrefix Result has 121468 conditions, 10723 events. 7255/10723 cut-off events. For 2336894/2336905 co-relation queries the response was YES. Maximal size of possible extension queue 591. Compared 61463 event pairs, 1621 based on Foata normal form. 10/10728 useless extension candidates. Maximal degree in co-relation 121252. Up to 8993 conditions per place. [2024-06-27 19:43:14,293 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 504 selfloop transitions, 256 changer transitions 0/763 dead transitions. [2024-06-27 19:43:14,294 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 479 places, 763 transitions, 15579 flow [2024-06-27 19:43:14,294 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 19:43:14,294 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 19:43:14,295 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 150 transitions. [2024-06-27 19:43:14,295 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3875968992248062 [2024-06-27 19:43:14,295 INFO L175 Difference]: Start difference. First operand has 471 places, 720 transitions, 12922 flow. Second operand 9 states and 150 transitions. [2024-06-27 19:43:14,295 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 479 places, 763 transitions, 15579 flow