./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/pthread-wmm/mix041_power.oepc_pso.oepc_rmo.oepc.i --full-output --witness-type correctness_witness --witnessparser.only.consider.loop.invariants false --cacsl2boogietranslator.check.unreachability.of.reach_error.function false --validate ./goblint.2024-06-19_11-23-25.files/mutex-meet-nonrel/mix041_power.oepc_pso.oepc_rmo.oepc.yml/witness.yml --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version eb4cb34f 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/mix041_power.oepc_pso.oepc_rmo.oepc.i ./goblint.2024-06-19_11-23-25.files/mutex-meet-nonrel/mix041_power.oepc_pso.oepc_rmo.oepc.yml/witness.yml -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --traceabstraction.compute.hoare.annotation.of.negated.interpolant.automaton,.abstraction.and.cfg false --witnessparser.only.consider.loop.invariants false --cacsl2boogietranslator.check.unreachability.of.reach_error.function false --- Real Ultimate output --- This is Ultimate 0.2.4-tmp.fs.goblint-validation-eb4cb34-m [2024-06-21 21:09:06,741 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-06-21 21:09:06,797 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-06-21 21:09:06,803 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-06-21 21:09:06,804 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-06-21 21:09:06,832 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-06-21 21:09:06,832 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-06-21 21:09:06,833 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-06-21 21:09:06,834 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-06-21 21:09:06,837 INFO L153 SettingsManager]: * Use memory slicer=true [2024-06-21 21:09:06,837 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-06-21 21:09:06,837 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-06-21 21:09:06,838 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-06-21 21:09:06,839 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-06-21 21:09:06,839 INFO L153 SettingsManager]: * Use SBE=true [2024-06-21 21:09:06,839 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-06-21 21:09:06,839 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-06-21 21:09:06,840 INFO L153 SettingsManager]: * sizeof long=4 [2024-06-21 21:09:06,840 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-06-21 21:09:06,840 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-06-21 21:09:06,840 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-06-21 21:09:06,841 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-06-21 21:09:06,841 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-06-21 21:09:06,841 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-06-21 21:09:06,841 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-06-21 21:09:06,841 INFO L153 SettingsManager]: * sizeof long double=12 [2024-06-21 21:09:06,842 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-06-21 21:09:06,842 INFO L153 SettingsManager]: * Use constant arrays=true [2024-06-21 21:09:06,842 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-06-21 21:09:06,842 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-06-21 21:09:06,843 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-06-21 21:09:06,843 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-06-21 21:09:06,844 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-21 21:09:06,844 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-06-21 21:09:06,844 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-06-21 21:09:06,844 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-06-21 21:09:06,844 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-06-21 21:09:06,844 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-06-21 21:09:06,845 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-06-21 21:09:06,845 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-06-21 21:09:06,845 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-06-21 21:09:06,845 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-06-21 21:09:06,845 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-06-21 21:09:06,845 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check unreachability of reach_error function -> false [2024-06-21 21:09:07,072 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-06-21 21:09:07,099 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-06-21 21:09:07,103 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-06-21 21:09:07,104 INFO L270 PluginConnector]: Initializing CDTParser... [2024-06-21 21:09:07,104 INFO L274 PluginConnector]: CDTParser initialized [2024-06-21 21:09:07,106 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-wmm/mix041_power.oepc_pso.oepc_rmo.oepc.i [2024-06-21 21:09:08,128 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-06-21 21:09:08,346 INFO L384 CDTParser]: Found 1 translation units. [2024-06-21 21:09:08,347 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/mix041_power.oepc_pso.oepc_rmo.oepc.i [2024-06-21 21:09:08,358 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/42324d36e/f5a26814649b4729874e98a443c11ec1/FLAGc5aeebc82 [2024-06-21 21:09:08,368 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/42324d36e/f5a26814649b4729874e98a443c11ec1 [2024-06-21 21:09:08,370 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-06-21 21:09:08,370 INFO L274 PluginConnector]: Witness Parser initialized [2024-06-21 21:09:08,371 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/./goblint.2024-06-19_11-23-25.files/mutex-meet-nonrel/mix041_power.oepc_pso.oepc_rmo.oepc.yml/witness.yml [2024-06-21 21:09:08,480 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-06-21 21:09:08,481 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-06-21 21:09:08,482 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-06-21 21:09:08,482 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-06-21 21:09:08,485 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-06-21 21:09:08,486 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.06 09:09:08" (1/2) ... [2024-06-21 21:09:08,487 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4977f76 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 09:09:08, skipping insertion in model container [2024-06-21 21:09:08,487 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.06 09:09:08" (1/2) ... [2024-06-21 21:09:08,488 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@20277bfb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 09:09:08, skipping insertion in model container [2024-06-21 21:09:08,489 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 21.06 09:09:08" (2/2) ... [2024-06-21 21:09:08,489 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4977f76 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 09:09:08, skipping insertion in model container [2024-06-21 21:09:08,489 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 21.06 09:09:08" (2/2) ... [2024-06-21 21:09:08,490 INFO L83 nessWitnessExtractor]: Extracting all invariants from correctness witness [2024-06-21 21:09:08,567 INFO L95 edCorrectnessWitness]: Found the following entries in the witness: [2024-06-21 21:09:08,568 INFO L97 edCorrectnessWitness]: Location invariant before [L819-L819] (((((((((((((((! multithreaded || z$read_delayed == (_Bool)0) && (! multithreaded || (z$w_buff1 == 0 || z$w_buff1 == 1))) && (! multithreaded || (z$mem_tmp == 0 || z$mem_tmp == 1))) && (! multithreaded || z$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || z$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || (((((((((((((((0 <= __unbuffered_cnt && z$flush_delayed == (_Bool)0) && z$r_buff0_thd0 == (_Bool)0) && z$r_buff0_thd2 == (_Bool)0) && z$r_buff1_thd0 == (_Bool)0) && z$r_buff1_thd2 == (_Bool)0) && z$read_delayed == (_Bool)0) && z$read_delayed_var == 0) && (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1)) && (__unbuffered_p1_EBX == 0 || __unbuffered_p1_EBX == 1)) && (y == 0 || y == 1)) && (z == 0 || z == 1)) && (z$mem_tmp == 0 || z$mem_tmp == 1)) && (z$w_buff0 == 0 || z$w_buff0 == 1)) && (z$w_buff1 == 0 || z$w_buff1 == 1)) && ((x == 0 || x == 1) || x == 2)))) && (! multithreaded || z$read_delayed_var == 0)) && (! multithreaded || z$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || z$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || (z$w_buff0 == 0 || z$w_buff0 == 1))) && (! multithreaded || (__unbuffered_p1_EBX == 0 || __unbuffered_p1_EBX == 1))) && (! multithreaded || (y == 0 || y == 1))) && (! multithreaded || ((x == 0 || x == 1) || x == 2))) && (! multithreaded || (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1))) && (! multithreaded || (z == 0 || z == 1))) && (! multithreaded || 0 <= __unbuffered_cnt) [2024-06-21 21:09:08,584 INFO L97 edCorrectnessWitness]: Location invariant before [L818-L818] (((((((((((((((! multithreaded || z$read_delayed == (_Bool)0) && (! multithreaded || (z$w_buff1 == 0 || z$w_buff1 == 1))) && (! multithreaded || (z$mem_tmp == 0 || z$mem_tmp == 1))) && (! multithreaded || z$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || z$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || (((((((((((((((0 <= __unbuffered_cnt && z$flush_delayed == (_Bool)0) && z$r_buff0_thd0 == (_Bool)0) && z$r_buff0_thd2 == (_Bool)0) && z$r_buff1_thd0 == (_Bool)0) && z$r_buff1_thd2 == (_Bool)0) && z$read_delayed == (_Bool)0) && z$read_delayed_var == 0) && (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1)) && (__unbuffered_p1_EBX == 0 || __unbuffered_p1_EBX == 1)) && (y == 0 || y == 1)) && (z == 0 || z == 1)) && (z$mem_tmp == 0 || z$mem_tmp == 1)) && (z$w_buff0 == 0 || z$w_buff0 == 1)) && (z$w_buff1 == 0 || z$w_buff1 == 1)) && ((x == 0 || x == 1) || x == 2)))) && (! multithreaded || z$read_delayed_var == 0)) && (! multithreaded || z$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || z$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || (z$w_buff0 == 0 || z$w_buff0 == 1))) && (! multithreaded || (__unbuffered_p1_EBX == 0 || __unbuffered_p1_EBX == 1))) && (! multithreaded || (y == 0 || y == 1))) && (! multithreaded || ((x == 0 || x == 1) || x == 2))) && (! multithreaded || (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1))) && (! multithreaded || (z == 0 || z == 1))) && (! multithreaded || 0 <= __unbuffered_cnt) [2024-06-21 21:09:08,584 INFO L103 edCorrectnessWitness]: ghost_variable multithreaded = 0 [2024-06-21 21:09:08,584 INFO L106 edCorrectnessWitness]: ghost_update [L816-L816] multithreaded = 1; [2024-06-21 21:09:08,633 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-06-21 21:09:08,919 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-21 21:09:08,926 INFO L202 MainTranslator]: Completed pre-run Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local [2024-06-21 21:09:09,030 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-21 21:09:09,060 INFO L206 MainTranslator]: Completed translation [2024-06-21 21:09:09,060 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 09:09:09 WrapperNode [2024-06-21 21:09:09,061 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-06-21 21:09:09,061 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-06-21 21:09:09,061 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-06-21 21:09:09,061 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-06-21 21:09:09,067 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 21.06 09:09:09" (1/1) ... [2024-06-21 21:09:09,078 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 21.06 09:09:09" (1/1) ... [2024-06-21 21:09:09,098 INFO L138 Inliner]: procedures = 174, calls = 38, calls flagged for inlining = 6, calls inlined = 7, statements flattened = 114 [2024-06-21 21:09:09,099 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-06-21 21:09:09,099 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-06-21 21:09:09,099 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-06-21 21:09:09,099 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-06-21 21:09:09,119 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 09:09:09" (1/1) ... [2024-06-21 21:09:09,120 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 09:09:09" (1/1) ... [2024-06-21 21:09:09,122 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 09:09:09" (1/1) ... [2024-06-21 21:09:09,150 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]. [2024-06-21 21:09:09,150 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 09:09:09" (1/1) ... [2024-06-21 21:09:09,150 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 09:09:09" (1/1) ... [2024-06-21 21:09:09,156 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 09:09:09" (1/1) ... [2024-06-21 21:09:09,158 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 09:09:09" (1/1) ... [2024-06-21 21:09:09,160 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 09:09:09" (1/1) ... [2024-06-21 21:09:09,161 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 09:09:09" (1/1) ... [2024-06-21 21:09:09,163 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-06-21 21:09:09,164 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-06-21 21:09:09,164 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-06-21 21:09:09,164 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-06-21 21:09:09,165 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 09:09:09" (1/1) ... [2024-06-21 21:09:09,174 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-21 21:09:09,180 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-21 21:09:09,193 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) [2024-06-21 21:09:09,247 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 [2024-06-21 21:09:09,261 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-06-21 21:09:09,261 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-06-21 21:09:09,262 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2024-06-21 21:09:09,262 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2024-06-21 21:09:09,262 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2024-06-21 21:09:09,262 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2024-06-21 21:09:09,262 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-06-21 21:09:09,262 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-06-21 21:09:09,262 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-06-21 21:09:09,263 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-06-21 21:09:09,264 WARN L214 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2024-06-21 21:09:09,364 INFO L244 CfgBuilder]: Building ICFG [2024-06-21 21:09:09,366 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-06-21 21:09:09,717 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-06-21 21:09:09,717 INFO L293 CfgBuilder]: Performing block encoding [2024-06-21 21:09:09,808 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-06-21 21:09:09,809 INFO L320 CfgBuilder]: Removed 0 assume(true) statements. [2024-06-21 21:09:09,809 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.06 09:09:09 BoogieIcfgContainer [2024-06-21 21:09:09,809 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-06-21 21:09:09,811 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-06-21 21:09:09,811 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-06-21 21:09:09,813 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-06-21 21:09:09,814 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.06 09:09:08" (1/4) ... [2024-06-21 21:09:09,814 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@a60d791 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.06 09:09:09, skipping insertion in model container [2024-06-21 21:09:09,814 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 21.06 09:09:08" (2/4) ... [2024-06-21 21:09:09,814 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@a60d791 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 21.06 09:09:09, skipping insertion in model container [2024-06-21 21:09:09,815 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 09:09:09" (3/4) ... [2024-06-21 21:09:09,815 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@a60d791 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 21.06 09:09:09, skipping insertion in model container [2024-06-21 21:09:09,815 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.06 09:09:09" (4/4) ... [2024-06-21 21:09:09,816 INFO L112 eAbstractionObserver]: Analyzing ICFG mix041_power.oepc_pso.oepc_rmo.oepc.i [2024-06-21 21:09:09,847 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-06-21 21:09:09,847 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2024-06-21 21:09:09,847 INFO L522 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-06-21 21:09:09,873 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-06-21 21:09:09,894 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 38 places, 31 transitions, 70 flow [2024-06-21 21:09:09,911 INFO L124 PetriNetUnfolderBase]: 0/29 cut-off events. [2024-06-21 21:09:09,911 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-21 21:09:09,912 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36 conditions, 29 events. 0/29 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 41 event pairs, 0 based on Foata normal form. 0/27 useless extension candidates. Maximal degree in co-relation 0. Up to 1 conditions per place. [2024-06-21 21:09:09,912 INFO L82 GeneralOperation]: Start removeDead. Operand has 38 places, 31 transitions, 70 flow [2024-06-21 21:09:09,914 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 30 places, 23 transitions, 52 flow [2024-06-21 21:09:09,921 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-06-21 21:09:09,925 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;@4fcb02e7, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-06-21 21:09:09,925 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2024-06-21 21:09:09,928 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-06-21 21:09:09,928 INFO L124 PetriNetUnfolderBase]: 0/5 cut-off events. [2024-06-21 21:09:09,928 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-21 21:09:09,928 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:09:09,929 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2024-06-21 21:09:09,929 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 21:09:09,933 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:09:09,933 INFO L85 PathProgramCache]: Analyzing trace with hash 332828771, now seen corresponding path program 1 times [2024-06-21 21:09:09,939 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:09:09,940 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1688534588] [2024-06-21 21:09:09,940 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:09:09,940 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:09:10,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:09:10,667 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:09:10,668 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:09:10,669 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1688534588] [2024-06-21 21:09:10,670 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1688534588] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:09:10,670 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:09:10,670 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-06-21 21:09:10,671 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1240090709] [2024-06-21 21:09:10,672 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:09:10,679 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-06-21 21:09:10,684 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:09:10,711 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-06-21 21:09:10,712 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-06-21 21:09:10,745 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 31 [2024-06-21 21:09:10,747 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 30 places, 23 transitions, 52 flow. Second operand has 3 states, 3 states have (on average 10.333333333333334) internal successors, (31), 3 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:09:10,747 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:09:10,747 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 31 [2024-06-21 21:09:10,748 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:09:10,838 INFO L124 PetriNetUnfolderBase]: 189/351 cut-off events. [2024-06-21 21:09:10,838 INFO L125 PetriNetUnfolderBase]: For 6/6 co-relation queries the response was YES. [2024-06-21 21:09:10,841 INFO L83 FinitePrefix]: Finished finitePrefix Result has 707 conditions, 351 events. 189/351 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 22. Compared 1290 event pairs, 115 based on Foata normal form. 1/338 useless extension candidates. Maximal degree in co-relation 696. Up to 333 conditions per place. [2024-06-21 21:09:10,843 INFO L140 encePairwiseOnDemand]: 26/31 looper letters, 22 selfloop transitions, 3 changer transitions 0/29 dead transitions. [2024-06-21 21:09:10,843 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 32 places, 29 transitions, 117 flow [2024-06-21 21:09:10,844 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-06-21 21:09:10,846 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-06-21 21:09:10,850 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 54 transitions. [2024-06-21 21:09:10,851 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5806451612903226 [2024-06-21 21:09:10,853 INFO L175 Difference]: Start difference. First operand has 30 places, 23 transitions, 52 flow. Second operand 3 states and 54 transitions. [2024-06-21 21:09:10,853 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 32 places, 29 transitions, 117 flow [2024-06-21 21:09:10,855 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 30 places, 29 transitions, 114 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-06-21 21:09:10,857 INFO L231 Difference]: Finished difference. Result has 31 places, 25 transitions, 71 flow [2024-06-21 21:09:10,858 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=50, PETRI_DIFFERENCE_MINUEND_PLACES=28, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=23, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=20, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=71, PETRI_PLACES=31, PETRI_TRANSITIONS=25} [2024-06-21 21:09:10,860 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 1 predicate places. [2024-06-21 21:09:10,860 INFO L495 AbstractCegarLoop]: Abstraction has has 31 places, 25 transitions, 71 flow [2024-06-21 21:09:10,861 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 10.333333333333334) internal successors, (31), 3 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:09:10,861 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:09:10,861 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:09:10,861 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-06-21 21:09:10,861 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 21:09:10,862 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:09:10,862 INFO L85 PathProgramCache]: Analyzing trace with hash 2020889858, now seen corresponding path program 1 times [2024-06-21 21:09:10,862 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:09:10,862 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1222932918] [2024-06-21 21:09:10,862 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:09:10,863 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:09:10,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:09:11,382 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:09:11,382 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:09:11,382 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1222932918] [2024-06-21 21:09:11,382 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1222932918] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:09:11,382 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:09:11,383 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-06-21 21:09:11,383 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1130617721] [2024-06-21 21:09:11,383 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:09:11,384 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-21 21:09:11,385 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:09:11,385 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-21 21:09:11,385 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-06-21 21:09:11,424 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 31 [2024-06-21 21:09:11,425 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 31 places, 25 transitions, 71 flow. Second operand has 4 states, 4 states have (on average 10.25) internal successors, (41), 4 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:09:11,425 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:09:11,425 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 31 [2024-06-21 21:09:11,425 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:09:11,535 INFO L124 PetriNetUnfolderBase]: 186/348 cut-off events. [2024-06-21 21:09:11,535 INFO L125 PetriNetUnfolderBase]: For 66/66 co-relation queries the response was YES. [2024-06-21 21:09:11,538 INFO L83 FinitePrefix]: Finished finitePrefix Result has 790 conditions, 348 events. 186/348 cut-off events. For 66/66 co-relation queries the response was YES. Maximal size of possible extension queue 22. Compared 1271 event pairs, 94 based on Foata normal form. 2/342 useless extension candidates. Maximal degree in co-relation 778. Up to 319 conditions per place. [2024-06-21 21:09:11,540 INFO L140 encePairwiseOnDemand]: 25/31 looper letters, 26 selfloop transitions, 5 changer transitions 0/35 dead transitions. [2024-06-21 21:09:11,541 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 34 places, 35 transitions, 159 flow [2024-06-21 21:09:11,541 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-21 21:09:11,541 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-21 21:09:11,543 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 69 transitions. [2024-06-21 21:09:11,556 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5564516129032258 [2024-06-21 21:09:11,556 INFO L175 Difference]: Start difference. First operand has 31 places, 25 transitions, 71 flow. Second operand 4 states and 69 transitions. [2024-06-21 21:09:11,556 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 34 places, 35 transitions, 159 flow [2024-06-21 21:09:11,557 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 33 places, 35 transitions, 156 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-06-21 21:09:11,558 INFO L231 Difference]: Finished difference. Result has 34 places, 27 transitions, 95 flow [2024-06-21 21:09:11,558 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=68, PETRI_DIFFERENCE_MINUEND_PLACES=30, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=25, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=20, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=95, PETRI_PLACES=34, PETRI_TRANSITIONS=27} [2024-06-21 21:09:11,558 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 4 predicate places. [2024-06-21 21:09:11,558 INFO L495 AbstractCegarLoop]: Abstraction has has 34 places, 27 transitions, 95 flow [2024-06-21 21:09:11,559 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 10.25) internal successors, (41), 4 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:09:11,559 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:09:11,559 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:09:11,559 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-06-21 21:09:11,559 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 21:09:11,559 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:09:11,559 INFO L85 PathProgramCache]: Analyzing trace with hash -1776923130, now seen corresponding path program 1 times [2024-06-21 21:09:11,559 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:09:11,560 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2082988666] [2024-06-21 21:09:11,560 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:09:11,560 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:09:11,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:09:12,043 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:09:12,043 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:09:12,044 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2082988666] [2024-06-21 21:09:12,044 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2082988666] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:09:12,044 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:09:12,044 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-21 21:09:12,044 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1543608437] [2024-06-21 21:09:12,044 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:09:12,044 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-21 21:09:12,044 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:09:12,045 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-21 21:09:12,045 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-06-21 21:09:12,090 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 31 [2024-06-21 21:09:12,091 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 34 places, 27 transitions, 95 flow. Second operand has 5 states, 5 states have (on average 10.2) internal successors, (51), 5 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) [2024-06-21 21:09:12,091 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:09:12,091 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 31 [2024-06-21 21:09:12,091 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:09:12,169 INFO L124 PetriNetUnfolderBase]: 187/354 cut-off events. [2024-06-21 21:09:12,170 INFO L125 PetriNetUnfolderBase]: For 197/197 co-relation queries the response was YES. [2024-06-21 21:09:12,170 INFO L83 FinitePrefix]: Finished finitePrefix Result has 882 conditions, 354 events. 187/354 cut-off events. For 197/197 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 1309 event pairs, 67 based on Foata normal form. 3/355 useless extension candidates. Maximal degree in co-relation 868. Up to 293 conditions per place. [2024-06-21 21:09:12,171 INFO L140 encePairwiseOnDemand]: 23/31 looper letters, 34 selfloop transitions, 11 changer transitions 0/49 dead transitions. [2024-06-21 21:09:12,171 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 38 places, 49 transitions, 251 flow [2024-06-21 21:09:12,172 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-21 21:09:12,172 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-21 21:09:12,172 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 90 transitions. [2024-06-21 21:09:12,173 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5806451612903226 [2024-06-21 21:09:12,173 INFO L175 Difference]: Start difference. First operand has 34 places, 27 transitions, 95 flow. Second operand 5 states and 90 transitions. [2024-06-21 21:09:12,173 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 38 places, 49 transitions, 251 flow [2024-06-21 21:09:12,174 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 36 places, 49 transitions, 242 flow, removed 1 selfloop flow, removed 2 redundant places. [2024-06-21 21:09:12,175 INFO L231 Difference]: Finished difference. Result has 39 places, 35 transitions, 162 flow [2024-06-21 21:09:12,175 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=86, PETRI_DIFFERENCE_MINUEND_PLACES=32, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=27, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=19, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=162, PETRI_PLACES=39, PETRI_TRANSITIONS=35} [2024-06-21 21:09:12,176 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 9 predicate places. [2024-06-21 21:09:12,176 INFO L495 AbstractCegarLoop]: Abstraction has has 39 places, 35 transitions, 162 flow [2024-06-21 21:09:12,176 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 10.2) internal successors, (51), 5 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) [2024-06-21 21:09:12,176 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:09:12,176 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:09:12,176 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-06-21 21:09:12,177 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 21:09:12,177 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:09:12,177 INFO L85 PathProgramCache]: Analyzing trace with hash 1414893681, now seen corresponding path program 1 times [2024-06-21 21:09:12,177 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:09:12,177 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1647036121] [2024-06-21 21:09:12,178 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:09:12,178 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:09:12,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:09:12,938 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:09:12,938 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:09:12,938 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1647036121] [2024-06-21 21:09:12,939 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1647036121] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:09:12,939 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:09:12,939 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 21:09:12,939 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1435819245] [2024-06-21 21:09:12,939 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:09:12,940 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 21:09:12,940 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:09:12,940 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 21:09:12,940 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-21 21:09:12,979 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 31 [2024-06-21 21:09:12,979 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 39 places, 35 transitions, 162 flow. Second operand has 6 states, 6 states have (on average 10.166666666666666) internal successors, (61), 6 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:09:12,980 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:09:12,980 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 31 [2024-06-21 21:09:12,980 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:09:13,082 INFO L124 PetriNetUnfolderBase]: 188/356 cut-off events. [2024-06-21 21:09:13,082 INFO L125 PetriNetUnfolderBase]: For 417/417 co-relation queries the response was YES. [2024-06-21 21:09:13,083 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1059 conditions, 356 events. 188/356 cut-off events. For 417/417 co-relation queries the response was YES. Maximal size of possible extension queue 22. Compared 1311 event pairs, 46 based on Foata normal form. 3/357 useless extension candidates. Maximal degree in co-relation 1042. Up to 282 conditions per place. [2024-06-21 21:09:13,084 INFO L140 encePairwiseOnDemand]: 22/31 looper letters, 38 selfloop transitions, 14 changer transitions 0/56 dead transitions. [2024-06-21 21:09:13,084 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 44 places, 56 transitions, 336 flow [2024-06-21 21:09:13,085 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 21:09:13,085 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 21:09:13,085 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 106 transitions. [2024-06-21 21:09:13,086 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5698924731182796 [2024-06-21 21:09:13,086 INFO L175 Difference]: Start difference. First operand has 39 places, 35 transitions, 162 flow. Second operand 6 states and 106 transitions. [2024-06-21 21:09:13,086 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 44 places, 56 transitions, 336 flow [2024-06-21 21:09:13,088 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 44 places, 56 transitions, 332 flow, removed 2 selfloop flow, removed 0 redundant places. [2024-06-21 21:09:13,088 INFO L231 Difference]: Finished difference. Result has 45 places, 38 transitions, 214 flow [2024-06-21 21:09:13,089 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=158, PETRI_DIFFERENCE_MINUEND_PLACES=39, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=35, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=21, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=214, PETRI_PLACES=45, PETRI_TRANSITIONS=38} [2024-06-21 21:09:13,089 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 15 predicate places. [2024-06-21 21:09:13,089 INFO L495 AbstractCegarLoop]: Abstraction has has 45 places, 38 transitions, 214 flow [2024-06-21 21:09:13,090 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 10.166666666666666) internal successors, (61), 6 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:09:13,090 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:09:13,090 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:09:13,090 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-06-21 21:09:13,090 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 21:09:13,090 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:09:13,091 INFO L85 PathProgramCache]: Analyzing trace with hash 1773879685, now seen corresponding path program 1 times [2024-06-21 21:09:13,091 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:09:13,091 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1950139974] [2024-06-21 21:09:13,091 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:09:13,091 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:09:13,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:09:13,869 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:09:13,869 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:09:13,870 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1950139974] [2024-06-21 21:09:13,870 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1950139974] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:09:13,870 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:09:13,870 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 21:09:13,870 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1571937129] [2024-06-21 21:09:13,870 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:09:13,871 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 21:09:13,871 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:09:13,871 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 21:09:13,872 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-21 21:09:13,957 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 31 [2024-06-21 21:09:13,958 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 38 transitions, 214 flow. Second operand has 7 states, 7 states have (on average 10.142857142857142) internal successors, (71), 7 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) [2024-06-21 21:09:13,958 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:09:13,958 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 31 [2024-06-21 21:09:13,958 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:09:14,118 INFO L124 PetriNetUnfolderBase]: 189/359 cut-off events. [2024-06-21 21:09:14,119 INFO L125 PetriNetUnfolderBase]: For 640/640 co-relation queries the response was YES. [2024-06-21 21:09:14,119 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1192 conditions, 359 events. 189/359 cut-off events. For 640/640 co-relation queries the response was YES. Maximal size of possible extension queue 22. Compared 1327 event pairs, 24 based on Foata normal form. 6/363 useless extension candidates. Maximal degree in co-relation 1172. Up to 259 conditions per place. [2024-06-21 21:09:14,121 INFO L140 encePairwiseOnDemand]: 22/31 looper letters, 38 selfloop transitions, 16 changer transitions 0/58 dead transitions. [2024-06-21 21:09:14,121 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 50 places, 58 transitions, 382 flow [2024-06-21 21:09:14,121 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 21:09:14,122 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 21:09:14,122 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 117 transitions. [2024-06-21 21:09:14,122 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5391705069124424 [2024-06-21 21:09:14,122 INFO L175 Difference]: Start difference. First operand has 45 places, 38 transitions, 214 flow. Second operand 7 states and 117 transitions. [2024-06-21 21:09:14,123 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 50 places, 58 transitions, 382 flow [2024-06-21 21:09:14,124 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 46 places, 58 transitions, 350 flow, removed 4 selfloop flow, removed 4 redundant places. [2024-06-21 21:09:14,125 INFO L231 Difference]: Finished difference. Result has 47 places, 38 transitions, 217 flow [2024-06-21 21:09:14,125 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=172, PETRI_DIFFERENCE_MINUEND_PLACES=40, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=21, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=217, PETRI_PLACES=47, PETRI_TRANSITIONS=38} [2024-06-21 21:09:14,126 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 17 predicate places. [2024-06-21 21:09:14,126 INFO L495 AbstractCegarLoop]: Abstraction has has 47 places, 38 transitions, 217 flow [2024-06-21 21:09:14,127 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 10.142857142857142) internal successors, (71), 7 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) [2024-06-21 21:09:14,127 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:09:14,127 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:09:14,127 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-06-21 21:09:14,127 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 21:09:14,128 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:09:14,128 INFO L85 PathProgramCache]: Analyzing trace with hash 1502486617, now seen corresponding path program 1 times [2024-06-21 21:09:14,128 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:09:14,128 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1757494608] [2024-06-21 21:09:14,128 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:09:14,128 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:09:14,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:09:14,489 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:09:14,490 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:09:14,490 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1757494608] [2024-06-21 21:09:14,490 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1757494608] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:09:14,490 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:09:14,490 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 21:09:14,490 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [668650780] [2024-06-21 21:09:14,490 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:09:14,491 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 21:09:14,491 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:09:14,491 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 21:09:14,491 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-06-21 21:09:14,540 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 31 [2024-06-21 21:09:14,540 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 47 places, 38 transitions, 217 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) [2024-06-21 21:09:14,540 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:09:14,540 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 31 [2024-06-21 21:09:14,540 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:09:14,693 INFO L124 PetriNetUnfolderBase]: 187/355 cut-off events. [2024-06-21 21:09:14,694 INFO L125 PetriNetUnfolderBase]: For 747/747 co-relation queries the response was YES. [2024-06-21 21:09:14,695 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1239 conditions, 355 events. 187/355 cut-off events. For 747/747 co-relation queries the response was YES. Maximal size of possible extension queue 22. Compared 1302 event pairs, 47 based on Foata normal form. 1/354 useless extension candidates. Maximal degree in co-relation 1217. Up to 329 conditions per place. [2024-06-21 21:09:14,696 INFO L140 encePairwiseOnDemand]: 25/31 looper letters, 34 selfloop transitions, 6 changer transitions 0/43 dead transitions. [2024-06-21 21:09:14,696 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 51 places, 43 transitions, 309 flow [2024-06-21 21:09:14,696 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-21 21:09:14,697 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-21 21:09:14,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 64 transitions. [2024-06-21 21:09:14,697 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4129032258064516 [2024-06-21 21:09:14,697 INFO L175 Difference]: Start difference. First operand has 47 places, 38 transitions, 217 flow. Second operand 5 states and 64 transitions. [2024-06-21 21:09:14,697 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 51 places, 43 transitions, 309 flow [2024-06-21 21:09:14,699 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 46 places, 43 transitions, 268 flow, removed 6 selfloop flow, removed 5 redundant places. [2024-06-21 21:09:14,699 INFO L231 Difference]: Finished difference. Result has 47 places, 38 transitions, 193 flow [2024-06-21 21:09:14,700 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=176, PETRI_DIFFERENCE_MINUEND_PLACES=42, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=193, PETRI_PLACES=47, PETRI_TRANSITIONS=38} [2024-06-21 21:09:14,700 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 17 predicate places. [2024-06-21 21:09:14,700 INFO L495 AbstractCegarLoop]: Abstraction has has 47 places, 38 transitions, 193 flow [2024-06-21 21:09:14,701 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) [2024-06-21 21:09:14,701 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:09:14,701 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:09:14,701 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-06-21 21:09:14,701 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 21:09:14,701 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:09:14,702 INFO L85 PathProgramCache]: Analyzing trace with hash -696182331, now seen corresponding path program 1 times [2024-06-21 21:09:14,702 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:09:14,702 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [478341362] [2024-06-21 21:09:14,702 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:09:14,702 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:09:14,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:09:15,156 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:09:15,156 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:09:15,156 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [478341362] [2024-06-21 21:09:15,156 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [478341362] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:09:15,157 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:09:15,157 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 21:09:15,157 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2005266637] [2024-06-21 21:09:15,157 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:09:15,157 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 21:09:15,158 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:09:15,158 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 21:09:15,158 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-21 21:09:15,193 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 21:09:15,193 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 47 places, 38 transitions, 193 flow. Second operand has 7 states, 7 states have (on average 7.428571428571429) internal successors, (52), 7 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:09:15,193 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:09:15,193 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 21:09:15,193 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:09:15,413 INFO L124 PetriNetUnfolderBase]: 212/382 cut-off events. [2024-06-21 21:09:15,413 INFO L125 PetriNetUnfolderBase]: For 1031/1031 co-relation queries the response was YES. [2024-06-21 21:09:15,414 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1324 conditions, 382 events. 212/382 cut-off events. For 1031/1031 co-relation queries the response was YES. Maximal size of possible extension queue 23. Compared 1353 event pairs, 55 based on Foata normal form. 1/381 useless extension candidates. Maximal degree in co-relation 1300. Up to 368 conditions per place. [2024-06-21 21:09:15,416 INFO L140 encePairwiseOnDemand]: 24/31 looper letters, 36 selfloop transitions, 8 changer transitions 0/46 dead transitions. [2024-06-21 21:09:15,416 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 52 places, 46 transitions, 303 flow [2024-06-21 21:09:15,417 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 21:09:15,417 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 21:09:15,417 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 69 transitions. [2024-06-21 21:09:15,417 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3709677419354839 [2024-06-21 21:09:15,417 INFO L175 Difference]: Start difference. First operand has 47 places, 38 transitions, 193 flow. Second operand 6 states and 69 transitions. [2024-06-21 21:09:15,418 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 52 places, 46 transitions, 303 flow [2024-06-21 21:09:15,419 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 48 places, 46 transitions, 288 flow, removed 1 selfloop flow, removed 4 redundant places. [2024-06-21 21:09:15,419 INFO L231 Difference]: Finished difference. Result has 49 places, 40 transitions, 211 flow [2024-06-21 21:09:15,420 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=178, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=211, PETRI_PLACES=49, PETRI_TRANSITIONS=40} [2024-06-21 21:09:15,420 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 19 predicate places. [2024-06-21 21:09:15,421 INFO L495 AbstractCegarLoop]: Abstraction has has 49 places, 40 transitions, 211 flow [2024-06-21 21:09:15,421 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 7.428571428571429) internal successors, (52), 7 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:09:15,421 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:09:15,421 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:09:15,421 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-06-21 21:09:15,421 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 21:09:15,422 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:09:15,422 INFO L85 PathProgramCache]: Analyzing trace with hash -479738274, now seen corresponding path program 1 times [2024-06-21 21:09:15,422 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:09:15,422 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1662526575] [2024-06-21 21:09:15,422 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:09:15,422 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:09:15,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:09:15,955 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:09:15,956 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:09:15,956 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1662526575] [2024-06-21 21:09:15,956 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1662526575] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:09:15,956 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:09:15,956 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 21:09:15,956 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [259424769] [2024-06-21 21:09:15,957 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:09:15,957 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 21:09:15,957 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:09:15,957 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 21:09:15,957 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-21 21:09:16,001 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 31 [2024-06-21 21:09:16,001 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 49 places, 40 transitions, 211 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) [2024-06-21 21:09:16,001 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:09:16,001 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 31 [2024-06-21 21:09:16,001 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:09:16,164 INFO L124 PetriNetUnfolderBase]: 197/368 cut-off events. [2024-06-21 21:09:16,164 INFO L125 PetriNetUnfolderBase]: For 1312/1312 co-relation queries the response was YES. [2024-06-21 21:09:16,165 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1347 conditions, 368 events. 197/368 cut-off events. For 1312/1312 co-relation queries the response was YES. Maximal size of possible extension queue 24. Compared 1345 event pairs, 51 based on Foata normal form. 2/368 useless extension candidates. Maximal degree in co-relation 1323. Up to 306 conditions per place. [2024-06-21 21:09:16,166 INFO L140 encePairwiseOnDemand]: 23/31 looper letters, 35 selfloop transitions, 13 changer transitions 0/52 dead transitions. [2024-06-21 21:09:16,166 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 54 places, 52 transitions, 358 flow [2024-06-21 21:09:16,167 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 21:09:16,167 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 21:09:16,167 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 82 transitions. [2024-06-21 21:09:16,168 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44086021505376344 [2024-06-21 21:09:16,168 INFO L175 Difference]: Start difference. First operand has 49 places, 40 transitions, 211 flow. Second operand 6 states and 82 transitions. [2024-06-21 21:09:16,168 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 54 places, 52 transitions, 358 flow [2024-06-21 21:09:16,169 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 50 places, 52 transitions, 341 flow, removed 2 selfloop flow, removed 4 redundant places. [2024-06-21 21:09:16,170 INFO L231 Difference]: Finished difference. Result has 51 places, 42 transitions, 242 flow [2024-06-21 21:09:16,170 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=194, PETRI_DIFFERENCE_MINUEND_PLACES=45, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=242, PETRI_PLACES=51, PETRI_TRANSITIONS=42} [2024-06-21 21:09:16,171 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 21 predicate places. [2024-06-21 21:09:16,171 INFO L495 AbstractCegarLoop]: Abstraction has has 51 places, 42 transitions, 242 flow [2024-06-21 21:09:16,171 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) [2024-06-21 21:09:16,171 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:09:16,172 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:09:16,172 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-06-21 21:09:16,172 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 21:09:16,172 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:09:16,172 INFO L85 PathProgramCache]: Analyzing trace with hash -450960354, now seen corresponding path program 2 times [2024-06-21 21:09:16,172 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:09:16,173 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1241481722] [2024-06-21 21:09:16,173 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:09:16,173 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:09:16,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:09:16,620 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:09:16,620 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:09:16,620 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1241481722] [2024-06-21 21:09:16,621 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1241481722] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:09:16,621 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:09:16,621 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 21:09:16,621 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1912178680] [2024-06-21 21:09:16,621 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:09:16,621 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 21:09:16,621 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:09:16,622 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 21:09:16,622 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-21 21:09:16,665 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 31 [2024-06-21 21:09:16,665 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 42 transitions, 242 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) [2024-06-21 21:09:16,665 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:09:16,665 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 31 [2024-06-21 21:09:16,665 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:09:16,831 INFO L124 PetriNetUnfolderBase]: 192/358 cut-off events. [2024-06-21 21:09:16,831 INFO L125 PetriNetUnfolderBase]: For 1557/1557 co-relation queries the response was YES. [2024-06-21 21:09:16,832 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1369 conditions, 358 events. 192/358 cut-off events. For 1557/1557 co-relation queries the response was YES. Maximal size of possible extension queue 23. Compared 1298 event pairs, 50 based on Foata normal form. 1/357 useless extension candidates. Maximal degree in co-relation 1344. Up to 327 conditions per place. [2024-06-21 21:09:16,834 INFO L140 encePairwiseOnDemand]: 24/31 looper letters, 36 selfloop transitions, 8 changer transitions 0/48 dead transitions. [2024-06-21 21:09:16,834 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 56 places, 48 transitions, 344 flow [2024-06-21 21:09:16,834 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 21:09:16,834 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 21:09:16,834 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 74 transitions. [2024-06-21 21:09:16,835 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3978494623655914 [2024-06-21 21:09:16,835 INFO L175 Difference]: Start difference. First operand has 51 places, 42 transitions, 242 flow. Second operand 6 states and 74 transitions. [2024-06-21 21:09:16,835 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 56 places, 48 transitions, 344 flow [2024-06-21 21:09:16,836 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 53 places, 48 transitions, 329 flow, removed 1 selfloop flow, removed 3 redundant places. [2024-06-21 21:09:16,837 INFO L231 Difference]: Finished difference. Result has 54 places, 42 transitions, 248 flow [2024-06-21 21:09:16,837 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=227, PETRI_DIFFERENCE_MINUEND_PLACES=48, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=248, PETRI_PLACES=54, PETRI_TRANSITIONS=42} [2024-06-21 21:09:16,838 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 24 predicate places. [2024-06-21 21:09:16,838 INFO L495 AbstractCegarLoop]: Abstraction has has 54 places, 42 transitions, 248 flow [2024-06-21 21:09:16,838 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) [2024-06-21 21:09:16,839 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:09:16,839 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:09:16,839 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-06-21 21:09:16,839 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 21:09:16,839 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:09:16,839 INFO L85 PathProgramCache]: Analyzing trace with hash -106814762, now seen corresponding path program 1 times [2024-06-21 21:09:16,839 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:09:16,842 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [269143582] [2024-06-21 21:09:16,843 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:09:16,843 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:09:16,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:09:17,226 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:09:17,226 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:09:17,226 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [269143582] [2024-06-21 21:09:17,226 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [269143582] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:09:17,226 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:09:17,226 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 21:09:17,226 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1342711512] [2024-06-21 21:09:17,226 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:09:17,226 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 21:09:17,227 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:09:17,227 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 21:09:17,227 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-21 21:09:17,278 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 21:09:17,279 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 54 places, 42 transitions, 248 flow. Second operand has 8 states, 8 states have (on average 7.375) internal successors, (59), 8 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) [2024-06-21 21:09:17,279 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:09:17,279 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 21:09:17,279 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:09:17,514 INFO L124 PetriNetUnfolderBase]: 202/365 cut-off events. [2024-06-21 21:09:17,515 INFO L125 PetriNetUnfolderBase]: For 1803/1803 co-relation queries the response was YES. [2024-06-21 21:09:17,528 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1410 conditions, 365 events. 202/365 cut-off events. For 1803/1803 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 1257 event pairs, 50 based on Foata normal form. 3/366 useless extension candidates. Maximal degree in co-relation 1384. Up to 342 conditions per place. [2024-06-21 21:09:17,530 INFO L140 encePairwiseOnDemand]: 23/31 looper letters, 41 selfloop transitions, 10 changer transitions 0/53 dead transitions. [2024-06-21 21:09:17,530 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 60 places, 53 transitions, 380 flow [2024-06-21 21:09:17,530 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 21:09:17,530 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 21:09:17,530 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 80 transitions. [2024-06-21 21:09:17,531 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3686635944700461 [2024-06-21 21:09:17,531 INFO L175 Difference]: Start difference. First operand has 54 places, 42 transitions, 248 flow. Second operand 7 states and 80 transitions. [2024-06-21 21:09:17,531 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 60 places, 53 transitions, 380 flow [2024-06-21 21:09:17,532 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 54 places, 53 transitions, 346 flow, removed 2 selfloop flow, removed 6 redundant places. [2024-06-21 21:09:17,533 INFO L231 Difference]: Finished difference. Result has 55 places, 44 transitions, 253 flow [2024-06-21 21:09:17,533 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=214, PETRI_DIFFERENCE_MINUEND_PLACES=48, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=253, PETRI_PLACES=55, PETRI_TRANSITIONS=44} [2024-06-21 21:09:17,534 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 25 predicate places. [2024-06-21 21:09:17,534 INFO L495 AbstractCegarLoop]: Abstraction has has 55 places, 44 transitions, 253 flow [2024-06-21 21:09:17,534 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 7.375) internal successors, (59), 8 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) [2024-06-21 21:09:17,534 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:09:17,534 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:09:17,534 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-06-21 21:09:17,534 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 21:09:17,534 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:09:17,534 INFO L85 PathProgramCache]: Analyzing trace with hash 806333126, now seen corresponding path program 1 times [2024-06-21 21:09:17,534 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:09:17,534 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1288574580] [2024-06-21 21:09:17,534 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:09:17,535 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:09:17,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:09:18,163 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:09:18,164 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:09:18,164 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1288574580] [2024-06-21 21:09:18,164 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1288574580] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:09:18,164 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:09:18,164 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 21:09:18,164 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [484789579] [2024-06-21 21:09:18,164 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:09:18,165 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 21:09:18,165 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:09:18,165 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 21:09:18,165 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-21 21:09:18,246 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 21:09:18,247 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 55 places, 44 transitions, 253 flow. Second operand has 8 states, 8 states have (on average 7.375) internal successors, (59), 8 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) [2024-06-21 21:09:18,247 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:09:18,247 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 21:09:18,247 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:09:18,431 INFO L124 PetriNetUnfolderBase]: 208/375 cut-off events. [2024-06-21 21:09:18,444 INFO L125 PetriNetUnfolderBase]: For 2062/2062 co-relation queries the response was YES. [2024-06-21 21:09:18,445 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1493 conditions, 375 events. 208/375 cut-off events. For 2062/2062 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 1301 event pairs, 50 based on Foata normal form. 2/375 useless extension candidates. Maximal degree in co-relation 1466. Up to 308 conditions per place. [2024-06-21 21:09:18,446 INFO L140 encePairwiseOnDemand]: 22/31 looper letters, 42 selfloop transitions, 17 changer transitions 0/61 dead transitions. [2024-06-21 21:09:18,446 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 61 places, 61 transitions, 445 flow [2024-06-21 21:09:18,447 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 21:09:18,447 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 21:09:18,447 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 89 transitions. [2024-06-21 21:09:18,447 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41013824884792627 [2024-06-21 21:09:18,447 INFO L175 Difference]: Start difference. First operand has 55 places, 44 transitions, 253 flow. Second operand 7 states and 89 transitions. [2024-06-21 21:09:18,448 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 61 places, 61 transitions, 445 flow [2024-06-21 21:09:18,449 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 56 places, 61 transitions, 422 flow, removed 3 selfloop flow, removed 5 redundant places. [2024-06-21 21:09:18,450 INFO L231 Difference]: Finished difference. Result has 57 places, 49 transitions, 298 flow [2024-06-21 21:09:18,450 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=230, PETRI_DIFFERENCE_MINUEND_PLACES=50, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=44, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=298, PETRI_PLACES=57, PETRI_TRANSITIONS=49} [2024-06-21 21:09:18,451 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 27 predicate places. [2024-06-21 21:09:18,451 INFO L495 AbstractCegarLoop]: Abstraction has has 57 places, 49 transitions, 298 flow [2024-06-21 21:09:18,451 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 7.375) internal successors, (59), 8 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) [2024-06-21 21:09:18,451 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:09:18,451 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:09:18,452 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-06-21 21:09:18,452 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 21:09:18,452 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:09:18,452 INFO L85 PathProgramCache]: Analyzing trace with hash -1569615836, now seen corresponding path program 2 times [2024-06-21 21:09:18,452 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:09:18,452 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [695704625] [2024-06-21 21:09:18,452 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:09:18,453 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:09:18,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:09:18,914 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:09:18,914 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:09:18,914 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [695704625] [2024-06-21 21:09:18,914 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [695704625] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:09:18,914 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:09:18,914 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 21:09:18,914 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [253000702] [2024-06-21 21:09:18,914 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:09:18,914 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 21:09:18,914 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:09:18,915 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 21:09:18,915 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-21 21:09:18,963 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 21:09:18,963 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 57 places, 49 transitions, 298 flow. Second operand has 8 states, 8 states have (on average 7.375) internal successors, (59), 8 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) [2024-06-21 21:09:18,963 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:09:18,963 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 21:09:18,963 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:09:19,108 INFO L124 PetriNetUnfolderBase]: 211/380 cut-off events. [2024-06-21 21:09:19,109 INFO L125 PetriNetUnfolderBase]: For 2401/2401 co-relation queries the response was YES. [2024-06-21 21:09:19,109 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1607 conditions, 380 events. 211/380 cut-off events. For 2401/2401 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 1314 event pairs, 48 based on Foata normal form. 1/379 useless extension candidates. Maximal degree in co-relation 1579. Up to 356 conditions per place. [2024-06-21 21:09:19,111 INFO L140 encePairwiseOnDemand]: 22/31 looper letters, 45 selfloop transitions, 15 changer transitions 0/62 dead transitions. [2024-06-21 21:09:19,111 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 64 places, 62 transitions, 496 flow [2024-06-21 21:09:19,111 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 21:09:19,111 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 21:09:19,112 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 88 transitions. [2024-06-21 21:09:19,112 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3548387096774194 [2024-06-21 21:09:19,112 INFO L175 Difference]: Start difference. First operand has 57 places, 49 transitions, 298 flow. Second operand 8 states and 88 transitions. [2024-06-21 21:09:19,112 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 64 places, 62 transitions, 496 flow [2024-06-21 21:09:19,115 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 61 places, 62 transitions, 475 flow, removed 4 selfloop flow, removed 3 redundant places. [2024-06-21 21:09:19,118 INFO L231 Difference]: Finished difference. Result has 63 places, 55 transitions, 361 flow [2024-06-21 21:09:19,118 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=278, PETRI_DIFFERENCE_MINUEND_PLACES=54, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=361, PETRI_PLACES=63, PETRI_TRANSITIONS=55} [2024-06-21 21:09:19,120 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 33 predicate places. [2024-06-21 21:09:19,120 INFO L495 AbstractCegarLoop]: Abstraction has has 63 places, 55 transitions, 361 flow [2024-06-21 21:09:19,120 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 7.375) internal successors, (59), 8 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) [2024-06-21 21:09:19,120 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:09:19,120 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:09:19,120 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-06-21 21:09:19,122 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 21:09:19,122 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:09:19,122 INFO L85 PathProgramCache]: Analyzing trace with hash 983701796, now seen corresponding path program 3 times [2024-06-21 21:09:19,122 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:09:19,122 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1187182463] [2024-06-21 21:09:19,122 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:09:19,123 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:09:19,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:09:19,663 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:09:19,663 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:09:19,663 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1187182463] [2024-06-21 21:09:19,664 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1187182463] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:09:19,664 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:09:19,664 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 21:09:19,664 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [180547962] [2024-06-21 21:09:19,664 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:09:19,664 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 21:09:19,665 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:09:19,665 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 21:09:19,665 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-21 21:09:19,735 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 21:09:19,736 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 55 transitions, 361 flow. Second operand has 8 states, 8 states have (on average 7.375) internal successors, (59), 8 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) [2024-06-21 21:09:19,736 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:09:19,736 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 21:09:19,736 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:09:19,924 INFO L124 PetriNetUnfolderBase]: 209/377 cut-off events. [2024-06-21 21:09:19,924 INFO L125 PetriNetUnfolderBase]: For 2832/2832 co-relation queries the response was YES. [2024-06-21 21:09:19,925 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1664 conditions, 377 events. 209/377 cut-off events. For 2832/2832 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 1313 event pairs, 48 based on Foata normal form. 1/376 useless extension candidates. Maximal degree in co-relation 1633. Up to 360 conditions per place. [2024-06-21 21:09:19,926 INFO L140 encePairwiseOnDemand]: 23/31 looper letters, 48 selfloop transitions, 11 changer transitions 0/61 dead transitions. [2024-06-21 21:09:19,927 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 69 places, 61 transitions, 493 flow [2024-06-21 21:09:19,927 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 21:09:19,927 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 21:09:19,927 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 78 transitions. [2024-06-21 21:09:19,928 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.35944700460829493 [2024-06-21 21:09:19,928 INFO L175 Difference]: Start difference. First operand has 63 places, 55 transitions, 361 flow. Second operand 7 states and 78 transitions. [2024-06-21 21:09:19,928 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 69 places, 61 transitions, 493 flow [2024-06-21 21:09:19,931 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 66 places, 61 transitions, 469 flow, removed 7 selfloop flow, removed 3 redundant places. [2024-06-21 21:09:19,932 INFO L231 Difference]: Finished difference. Result has 67 places, 55 transitions, 364 flow [2024-06-21 21:09:19,932 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=337, PETRI_DIFFERENCE_MINUEND_PLACES=60, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=55, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=364, PETRI_PLACES=67, PETRI_TRANSITIONS=55} [2024-06-21 21:09:19,933 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 37 predicate places. [2024-06-21 21:09:19,933 INFO L495 AbstractCegarLoop]: Abstraction has has 67 places, 55 transitions, 364 flow [2024-06-21 21:09:19,933 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 7.375) internal successors, (59), 8 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) [2024-06-21 21:09:19,933 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:09:19,933 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:09:19,933 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-06-21 21:09:19,933 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 21:09:19,934 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:09:19,934 INFO L85 PathProgramCache]: Analyzing trace with hash -777291083, now seen corresponding path program 1 times [2024-06-21 21:09:19,934 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:09:19,934 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2139883223] [2024-06-21 21:09:19,934 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:09:19,934 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:09:19,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:09:20,575 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:09:20,575 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:09:20,575 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2139883223] [2024-06-21 21:09:20,575 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2139883223] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:09:20,575 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:09:20,576 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 21:09:20,576 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [794159082] [2024-06-21 21:09:20,576 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:09:20,576 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 21:09:20,576 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:09:20,576 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 21:09:20,577 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-21 21:09:20,660 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 31 [2024-06-21 21:09:20,661 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 67 places, 55 transitions, 364 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) [2024-06-21 21:09:20,661 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:09:20,661 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 31 [2024-06-21 21:09:20,661 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:09:20,806 INFO L124 PetriNetUnfolderBase]: 202/372 cut-off events. [2024-06-21 21:09:20,807 INFO L125 PetriNetUnfolderBase]: For 3342/3342 co-relation queries the response was YES. [2024-06-21 21:09:20,808 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1681 conditions, 372 events. 202/372 cut-off events. For 3342/3342 co-relation queries the response was YES. Maximal size of possible extension queue 22. Compared 1317 event pairs, 46 based on Foata normal form. 1/371 useless extension candidates. Maximal degree in co-relation 1648. Up to 288 conditions per place. [2024-06-21 21:09:20,809 INFO L140 encePairwiseOnDemand]: 23/31 looper letters, 46 selfloop transitions, 18 changer transitions 0/72 dead transitions. [2024-06-21 21:09:20,809 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 73 places, 72 transitions, 578 flow [2024-06-21 21:09:20,810 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 21:09:20,810 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 21:09:20,810 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 95 transitions. [2024-06-21 21:09:20,810 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4377880184331797 [2024-06-21 21:09:20,810 INFO L175 Difference]: Start difference. First operand has 67 places, 55 transitions, 364 flow. Second operand 7 states and 95 transitions. [2024-06-21 21:09:20,810 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 73 places, 72 transitions, 578 flow [2024-06-21 21:09:20,813 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 67 places, 72 transitions, 551 flow, removed 1 selfloop flow, removed 6 redundant places. [2024-06-21 21:09:20,814 INFO L231 Difference]: Finished difference. Result has 68 places, 59 transitions, 406 flow [2024-06-21 21:09:20,814 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=337, PETRI_DIFFERENCE_MINUEND_PLACES=61, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=55, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=406, PETRI_PLACES=68, PETRI_TRANSITIONS=59} [2024-06-21 21:09:20,815 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 38 predicate places. [2024-06-21 21:09:20,815 INFO L495 AbstractCegarLoop]: Abstraction has has 68 places, 59 transitions, 406 flow [2024-06-21 21:09:20,815 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) [2024-06-21 21:09:20,815 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:09:20,816 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:09:20,816 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-06-21 21:09:20,816 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 21:09:20,816 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:09:20,816 INFO L85 PathProgramCache]: Analyzing trace with hash -1470674017, now seen corresponding path program 2 times [2024-06-21 21:09:20,816 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:09:20,817 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [548616959] [2024-06-21 21:09:20,817 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:09:20,817 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:09:20,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:09:21,545 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:09:21,545 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:09:21,546 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [548616959] [2024-06-21 21:09:21,546 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [548616959] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:09:21,546 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:09:21,546 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 21:09:21,546 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1005172266] [2024-06-21 21:09:21,546 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:09:21,546 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 21:09:21,546 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:09:21,546 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 21:09:21,546 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-21 21:09:21,611 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 31 [2024-06-21 21:09:21,611 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 68 places, 59 transitions, 406 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) [2024-06-21 21:09:21,611 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:09:21,611 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 31 [2024-06-21 21:09:21,611 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:09:21,753 INFO L124 PetriNetUnfolderBase]: 200/369 cut-off events. [2024-06-21 21:09:21,753 INFO L125 PetriNetUnfolderBase]: For 3767/3767 co-relation queries the response was YES. [2024-06-21 21:09:21,754 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1740 conditions, 369 events. 200/369 cut-off events. For 3767/3767 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 1309 event pairs, 46 based on Foata normal form. 1/368 useless extension candidates. Maximal degree in co-relation 1706. Up to 301 conditions per place. [2024-06-21 21:09:21,756 INFO L140 encePairwiseOnDemand]: 22/31 looper letters, 44 selfloop transitions, 16 changer transitions 0/68 dead transitions. [2024-06-21 21:09:21,756 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 74 places, 68 transitions, 550 flow [2024-06-21 21:09:21,756 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 21:09:21,756 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 21:09:21,757 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 91 transitions. [2024-06-21 21:09:21,757 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41935483870967744 [2024-06-21 21:09:21,757 INFO L175 Difference]: Start difference. First operand has 68 places, 59 transitions, 406 flow. Second operand 7 states and 91 transitions. [2024-06-21 21:09:21,757 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 74 places, 68 transitions, 550 flow [2024-06-21 21:09:21,760 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 71 places, 68 transitions, 523 flow, removed 6 selfloop flow, removed 3 redundant places. [2024-06-21 21:09:21,761 INFO L231 Difference]: Finished difference. Result has 72 places, 59 transitions, 416 flow [2024-06-21 21:09:21,761 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=379, PETRI_DIFFERENCE_MINUEND_PLACES=65, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=59, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=416, PETRI_PLACES=72, PETRI_TRANSITIONS=59} [2024-06-21 21:09:21,761 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 42 predicate places. [2024-06-21 21:09:21,761 INFO L495 AbstractCegarLoop]: Abstraction has has 72 places, 59 transitions, 416 flow [2024-06-21 21:09:21,762 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) [2024-06-21 21:09:21,762 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:09:21,762 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:09:21,762 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-06-21 21:09:21,762 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 21:09:21,762 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:09:21,762 INFO L85 PathProgramCache]: Analyzing trace with hash -1466954792, now seen corresponding path program 1 times [2024-06-21 21:09:21,762 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:09:21,763 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [367997707] [2024-06-21 21:09:21,763 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:09:21,763 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:09:21,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:09:22,305 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:09:22,306 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:09:22,306 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [367997707] [2024-06-21 21:09:22,308 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [367997707] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:09:22,308 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:09:22,308 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 21:09:22,308 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1087334736] [2024-06-21 21:09:22,308 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:09:22,309 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 21:09:22,309 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:09:22,309 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 21:09:22,309 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-21 21:09:22,356 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 21:09:22,356 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 72 places, 59 transitions, 416 flow. Second operand has 8 states, 8 states have (on average 7.5) internal successors, (60), 8 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) [2024-06-21 21:09:22,356 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:09:22,356 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 21:09:22,356 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:09:22,509 INFO L124 PetriNetUnfolderBase]: 213/384 cut-off events. [2024-06-21 21:09:22,509 INFO L125 PetriNetUnfolderBase]: For 4204/4204 co-relation queries the response was YES. [2024-06-21 21:09:22,511 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1862 conditions, 384 events. 213/384 cut-off events. For 4204/4204 co-relation queries the response was YES. Maximal size of possible extension queue 22. Compared 1340 event pairs, 49 based on Foata normal form. 1/383 useless extension candidates. Maximal degree in co-relation 1826. Up to 315 conditions per place. [2024-06-21 21:09:22,513 INFO L140 encePairwiseOnDemand]: 22/31 looper letters, 47 selfloop transitions, 25 changer transitions 0/74 dead transitions. [2024-06-21 21:09:22,513 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 78 places, 74 transitions, 640 flow [2024-06-21 21:09:22,513 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 21:09:22,514 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 21:09:22,514 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 92 transitions. [2024-06-21 21:09:22,514 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.423963133640553 [2024-06-21 21:09:22,514 INFO L175 Difference]: Start difference. First operand has 72 places, 59 transitions, 416 flow. Second operand 7 states and 92 transitions. [2024-06-21 21:09:22,514 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 78 places, 74 transitions, 640 flow [2024-06-21 21:09:22,518 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 72 places, 74 transitions, 600 flow, removed 2 selfloop flow, removed 6 redundant places. [2024-06-21 21:09:22,519 INFO L231 Difference]: Finished difference. Result has 73 places, 61 transitions, 445 flow [2024-06-21 21:09:22,519 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=376, PETRI_DIFFERENCE_MINUEND_PLACES=66, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=59, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=445, PETRI_PLACES=73, PETRI_TRANSITIONS=61} [2024-06-21 21:09:22,519 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 43 predicate places. [2024-06-21 21:09:22,519 INFO L495 AbstractCegarLoop]: Abstraction has has 73 places, 61 transitions, 445 flow [2024-06-21 21:09:22,520 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 7.5) internal successors, (60), 8 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) [2024-06-21 21:09:22,520 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:09:22,520 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:09:22,520 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-06-21 21:09:22,520 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 21:09:22,520 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:09:22,521 INFO L85 PathProgramCache]: Analyzing trace with hash -1466949212, now seen corresponding path program 2 times [2024-06-21 21:09:22,521 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:09:22,521 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1934802849] [2024-06-21 21:09:22,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:09:22,521 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:09:22,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:09:23,030 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:09:23,030 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:09:23,030 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1934802849] [2024-06-21 21:09:23,030 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1934802849] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:09:23,030 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:09:23,030 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 21:09:23,030 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1348663787] [2024-06-21 21:09:23,030 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:09:23,031 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 21:09:23,031 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:09:23,031 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 21:09:23,031 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-21 21:09:23,079 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 21:09:23,079 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 73 places, 61 transitions, 445 flow. Second operand has 8 states, 8 states have (on average 7.5) internal successors, (60), 8 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) [2024-06-21 21:09:23,079 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:09:23,079 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 21:09:23,079 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:09:23,206 INFO L124 PetriNetUnfolderBase]: 216/389 cut-off events. [2024-06-21 21:09:23,206 INFO L125 PetriNetUnfolderBase]: For 4740/4740 co-relation queries the response was YES. [2024-06-21 21:09:23,207 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1936 conditions, 389 events. 216/389 cut-off events. For 4740/4740 co-relation queries the response was YES. Maximal size of possible extension queue 23. Compared 1355 event pairs, 49 based on Foata normal form. 1/388 useless extension candidates. Maximal degree in co-relation 1899. Up to 319 conditions per place. [2024-06-21 21:09:23,209 INFO L140 encePairwiseOnDemand]: 23/31 looper letters, 47 selfloop transitions, 24 changer transitions 0/73 dead transitions. [2024-06-21 21:09:23,209 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 79 places, 73 transitions, 663 flow [2024-06-21 21:09:23,209 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 21:09:23,209 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 21:09:23,211 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 88 transitions. [2024-06-21 21:09:23,211 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4055299539170507 [2024-06-21 21:09:23,211 INFO L175 Difference]: Start difference. First operand has 73 places, 61 transitions, 445 flow. Second operand 7 states and 88 transitions. [2024-06-21 21:09:23,211 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 79 places, 73 transitions, 663 flow [2024-06-21 21:09:23,216 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 74 places, 73 transitions, 598 flow, removed 5 selfloop flow, removed 5 redundant places. [2024-06-21 21:09:23,217 INFO L231 Difference]: Finished difference. Result has 75 places, 63 transitions, 452 flow [2024-06-21 21:09:23,218 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=386, PETRI_DIFFERENCE_MINUEND_PLACES=68, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=61, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=452, PETRI_PLACES=75, PETRI_TRANSITIONS=63} [2024-06-21 21:09:23,218 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 45 predicate places. [2024-06-21 21:09:23,218 INFO L495 AbstractCegarLoop]: Abstraction has has 75 places, 63 transitions, 452 flow [2024-06-21 21:09:23,218 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 7.5) internal successors, (60), 8 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) [2024-06-21 21:09:23,218 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:09:23,218 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:09:23,219 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-06-21 21:09:23,219 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 21:09:23,219 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:09:23,219 INFO L85 PathProgramCache]: Analyzing trace with hash 968034681, now seen corresponding path program 1 times [2024-06-21 21:09:23,219 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:09:23,219 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2041040603] [2024-06-21 21:09:23,219 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:09:23,220 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:09:23,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:09:23,834 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:09:23,834 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:09:23,834 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2041040603] [2024-06-21 21:09:23,835 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2041040603] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:09:23,835 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:09:23,835 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 21:09:23,835 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [571564748] [2024-06-21 21:09:23,835 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:09:23,836 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 21:09:23,836 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:09:23,836 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 21:09:23,836 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-21 21:09:23,890 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 21:09:23,891 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 75 places, 63 transitions, 452 flow. Second operand has 9 states, 9 states have (on average 7.333333333333333) internal successors, (66), 9 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:09:23,891 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:09:23,891 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 21:09:23,892 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:09:24,087 INFO L124 PetriNetUnfolderBase]: 254/451 cut-off events. [2024-06-21 21:09:24,087 INFO L125 PetriNetUnfolderBase]: For 6641/6641 co-relation queries the response was YES. [2024-06-21 21:09:24,088 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2234 conditions, 451 events. 254/451 cut-off events. For 6641/6641 co-relation queries the response was YES. Maximal size of possible extension queue 28. Compared 1659 event pairs, 56 based on Foata normal form. 6/455 useless extension candidates. Maximal degree in co-relation 2196. Up to 308 conditions per place. [2024-06-21 21:09:24,105 INFO L140 encePairwiseOnDemand]: 20/31 looper letters, 59 selfloop transitions, 25 changer transitions 0/86 dead transitions. [2024-06-21 21:09:24,105 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 82 places, 86 transitions, 736 flow [2024-06-21 21:09:24,106 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 21:09:24,106 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 21:09:24,106 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 105 transitions. [2024-06-21 21:09:24,106 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42338709677419356 [2024-06-21 21:09:24,106 INFO L175 Difference]: Start difference. First operand has 75 places, 63 transitions, 452 flow. Second operand 8 states and 105 transitions. [2024-06-21 21:09:24,107 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 82 places, 86 transitions, 736 flow [2024-06-21 21:09:24,111 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 78 places, 86 transitions, 700 flow, removed 2 selfloop flow, removed 4 redundant places. [2024-06-21 21:09:24,112 INFO L231 Difference]: Finished difference. Result has 80 places, 70 transitions, 525 flow [2024-06-21 21:09:24,112 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=416, PETRI_DIFFERENCE_MINUEND_PLACES=71, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=63, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=525, PETRI_PLACES=80, PETRI_TRANSITIONS=70} [2024-06-21 21:09:24,113 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 50 predicate places. [2024-06-21 21:09:24,113 INFO L495 AbstractCegarLoop]: Abstraction has has 80 places, 70 transitions, 525 flow [2024-06-21 21:09:24,114 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 7.333333333333333) internal successors, (66), 9 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:09:24,114 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:09:24,114 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:09:24,114 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2024-06-21 21:09:24,115 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 21:09:24,115 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:09:24,115 INFO L85 PathProgramCache]: Analyzing trace with hash -1413449641, now seen corresponding path program 2 times [2024-06-21 21:09:24,115 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:09:24,115 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [624529910] [2024-06-21 21:09:24,115 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:09:24,115 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:09:24,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:09:24,673 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:09:24,673 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:09:24,674 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [624529910] [2024-06-21 21:09:24,674 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [624529910] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:09:24,674 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:09:24,674 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 21:09:24,674 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [528616125] [2024-06-21 21:09:24,674 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:09:24,675 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 21:09:24,676 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:09:24,676 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 21:09:24,676 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-21 21:09:24,761 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 21:09:24,761 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 80 places, 70 transitions, 525 flow. Second operand has 9 states, 9 states have (on average 7.333333333333333) internal successors, (66), 9 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:09:24,761 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:09:24,761 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 21:09:24,761 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:09:24,904 INFO L124 PetriNetUnfolderBase]: 263/466 cut-off events. [2024-06-21 21:09:24,904 INFO L125 PetriNetUnfolderBase]: For 7144/7144 co-relation queries the response was YES. [2024-06-21 21:09:24,905 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2470 conditions, 466 events. 263/466 cut-off events. For 7144/7144 co-relation queries the response was YES. Maximal size of possible extension queue 30. Compared 1723 event pairs, 53 based on Foata normal form. 3/467 useless extension candidates. Maximal degree in co-relation 2430. Up to 415 conditions per place. [2024-06-21 21:09:24,907 INFO L140 encePairwiseOnDemand]: 21/31 looper letters, 66 selfloop transitions, 18 changer transitions 0/86 dead transitions. [2024-06-21 21:09:24,907 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 87 places, 86 transitions, 795 flow [2024-06-21 21:09:24,907 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 21:09:24,907 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 21:09:24,908 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 96 transitions. [2024-06-21 21:09:24,908 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3870967741935484 [2024-06-21 21:09:24,908 INFO L175 Difference]: Start difference. First operand has 80 places, 70 transitions, 525 flow. Second operand 8 states and 96 transitions. [2024-06-21 21:09:24,908 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 87 places, 86 transitions, 795 flow [2024-06-21 21:09:24,915 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 84 places, 86 transitions, 770 flow, removed 7 selfloop flow, removed 3 redundant places. [2024-06-21 21:09:24,921 INFO L231 Difference]: Finished difference. Result has 85 places, 74 transitions, 581 flow [2024-06-21 21:09:24,922 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=500, PETRI_DIFFERENCE_MINUEND_PLACES=77, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=70, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=54, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=581, PETRI_PLACES=85, PETRI_TRANSITIONS=74} [2024-06-21 21:09:24,922 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 55 predicate places. [2024-06-21 21:09:24,922 INFO L495 AbstractCegarLoop]: Abstraction has has 85 places, 74 transitions, 581 flow [2024-06-21 21:09:24,922 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 7.333333333333333) internal successors, (66), 9 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:09:24,922 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:09:24,922 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:09:24,923 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2024-06-21 21:09:24,923 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 21:09:24,923 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:09:24,923 INFO L85 PathProgramCache]: Analyzing trace with hash 429985406, now seen corresponding path program 3 times [2024-06-21 21:09:24,924 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:09:24,924 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1722325505] [2024-06-21 21:09:24,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:09:24,925 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:09:24,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:09:25,387 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:09:25,387 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:09:25,388 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1722325505] [2024-06-21 21:09:25,388 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1722325505] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:09:25,388 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:09:25,388 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 21:09:25,388 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [537574150] [2024-06-21 21:09:25,388 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:09:25,388 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 21:09:25,389 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:09:25,389 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 21:09:25,389 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-21 21:09:25,442 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 21:09:25,442 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 85 places, 74 transitions, 581 flow. Second operand has 8 states, 8 states have (on average 7.5) internal successors, (60), 8 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) [2024-06-21 21:09:25,442 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:09:25,442 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 21:09:25,443 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:09:25,641 INFO L124 PetriNetUnfolderBase]: 261/463 cut-off events. [2024-06-21 21:09:25,641 INFO L125 PetriNetUnfolderBase]: For 7437/7437 co-relation queries the response was YES. [2024-06-21 21:09:25,642 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2500 conditions, 463 events. 261/463 cut-off events. For 7437/7437 co-relation queries the response was YES. Maximal size of possible extension queue 29. Compared 1708 event pairs, 54 based on Foata normal form. 1/462 useless extension candidates. Maximal degree in co-relation 2457. Up to 443 conditions per place. [2024-06-21 21:09:25,644 INFO L140 encePairwiseOnDemand]: 23/31 looper letters, 66 selfloop transitions, 12 changer transitions 0/80 dead transitions. [2024-06-21 21:09:25,644 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 91 places, 80 transitions, 751 flow [2024-06-21 21:09:25,645 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 21:09:25,645 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 21:09:25,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 79 transitions. [2024-06-21 21:09:25,645 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3640552995391705 [2024-06-21 21:09:25,646 INFO L175 Difference]: Start difference. First operand has 85 places, 74 transitions, 581 flow. Second operand 7 states and 79 transitions. [2024-06-21 21:09:25,646 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 91 places, 80 transitions, 751 flow [2024-06-21 21:09:25,652 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 87 places, 80 transitions, 719 flow, removed 8 selfloop flow, removed 4 redundant places. [2024-06-21 21:09:25,653 INFO L231 Difference]: Finished difference. Result has 88 places, 74 transitions, 578 flow [2024-06-21 21:09:25,653 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=549, PETRI_DIFFERENCE_MINUEND_PLACES=81, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=74, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=62, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=578, PETRI_PLACES=88, PETRI_TRANSITIONS=74} [2024-06-21 21:09:25,653 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 58 predicate places. [2024-06-21 21:09:25,654 INFO L495 AbstractCegarLoop]: Abstraction has has 88 places, 74 transitions, 578 flow [2024-06-21 21:09:25,654 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 7.5) internal successors, (60), 8 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) [2024-06-21 21:09:25,654 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:09:25,654 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:09:25,654 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2024-06-21 21:09:25,654 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 21:09:25,654 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:09:25,655 INFO L85 PathProgramCache]: Analyzing trace with hash -1406097991, now seen corresponding path program 3 times [2024-06-21 21:09:25,655 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:09:25,655 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1802373541] [2024-06-21 21:09:25,655 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:09:25,655 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:09:25,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:09:26,141 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:09:26,142 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:09:26,142 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1802373541] [2024-06-21 21:09:26,142 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1802373541] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:09:26,142 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:09:26,142 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 21:09:26,142 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1468148456] [2024-06-21 21:09:26,143 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:09:26,143 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 21:09:26,143 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:09:26,143 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 21:09:26,143 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-21 21:09:26,215 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 21:09:26,216 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 88 places, 74 transitions, 578 flow. Second operand has 9 states, 9 states have (on average 7.333333333333333) internal successors, (66), 9 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:09:26,216 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:09:26,216 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 21:09:26,216 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:09:26,423 INFO L124 PetriNetUnfolderBase]: 270/478 cut-off events. [2024-06-21 21:09:26,423 INFO L125 PetriNetUnfolderBase]: For 8460/8460 co-relation queries the response was YES. [2024-06-21 21:09:26,425 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2588 conditions, 478 events. 270/478 cut-off events. For 8460/8460 co-relation queries the response was YES. Maximal size of possible extension queue 31. Compared 1795 event pairs, 53 based on Foata normal form. 3/479 useless extension candidates. Maximal degree in co-relation 2544. Up to 435 conditions per place. [2024-06-21 21:09:26,426 INFO L140 encePairwiseOnDemand]: 21/31 looper letters, 70 selfloop transitions, 16 changer transitions 0/88 dead transitions. [2024-06-21 21:09:26,427 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 95 places, 88 transitions, 842 flow [2024-06-21 21:09:26,427 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 21:09:26,427 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 21:09:26,427 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 94 transitions. [2024-06-21 21:09:26,428 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3790322580645161 [2024-06-21 21:09:26,428 INFO L175 Difference]: Start difference. First operand has 88 places, 74 transitions, 578 flow. Second operand 8 states and 94 transitions. [2024-06-21 21:09:26,428 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 95 places, 88 transitions, 842 flow [2024-06-21 21:09:26,435 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 88 places, 88 transitions, 794 flow, removed 1 selfloop flow, removed 7 redundant places. [2024-06-21 21:09:26,437 INFO L231 Difference]: Finished difference. Result has 89 places, 76 transitions, 589 flow [2024-06-21 21:09:26,437 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=530, PETRI_DIFFERENCE_MINUEND_PLACES=81, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=74, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=60, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=589, PETRI_PLACES=89, PETRI_TRANSITIONS=76} [2024-06-21 21:09:26,437 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 59 predicate places. [2024-06-21 21:09:26,437 INFO L495 AbstractCegarLoop]: Abstraction has has 89 places, 76 transitions, 589 flow [2024-06-21 21:09:26,438 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 7.333333333333333) internal successors, (66), 9 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:09:26,438 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:09:26,438 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:09:26,438 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2024-06-21 21:09:26,438 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 21:09:26,438 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:09:26,439 INFO L85 PathProgramCache]: Analyzing trace with hash 1174955031, now seen corresponding path program 4 times [2024-06-21 21:09:26,439 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:09:26,439 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [662287214] [2024-06-21 21:09:26,439 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:09:26,439 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:09:26,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:09:26,885 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:09:26,885 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:09:26,886 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [662287214] [2024-06-21 21:09:26,886 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [662287214] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:09:26,886 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:09:26,886 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 21:09:26,886 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [977524557] [2024-06-21 21:09:26,886 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:09:26,886 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 21:09:26,887 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:09:26,887 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 21:09:26,887 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-21 21:09:26,950 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 21:09:26,950 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 89 places, 76 transitions, 589 flow. Second operand has 9 states, 9 states have (on average 7.333333333333333) internal successors, (66), 9 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:09:26,951 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:09:26,951 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 21:09:26,951 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:09:27,175 INFO L124 PetriNetUnfolderBase]: 264/469 cut-off events. [2024-06-21 21:09:27,175 INFO L125 PetriNetUnfolderBase]: For 8586/8586 co-relation queries the response was YES. [2024-06-21 21:09:27,176 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2522 conditions, 469 events. 264/469 cut-off events. For 8586/8586 co-relation queries the response was YES. Maximal size of possible extension queue 30. Compared 1744 event pairs, 51 based on Foata normal form. 3/470 useless extension candidates. Maximal degree in co-relation 2477. Up to 443 conditions per place. [2024-06-21 21:09:27,178 INFO L140 encePairwiseOnDemand]: 21/31 looper letters, 70 selfloop transitions, 13 changer transitions 0/85 dead transitions. [2024-06-21 21:09:27,178 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 96 places, 85 transitions, 777 flow [2024-06-21 21:09:27,178 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 21:09:27,178 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 21:09:27,179 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 89 transitions. [2024-06-21 21:09:27,179 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3588709677419355 [2024-06-21 21:09:27,179 INFO L175 Difference]: Start difference. First operand has 89 places, 76 transitions, 589 flow. Second operand 8 states and 89 transitions. [2024-06-21 21:09:27,179 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 96 places, 85 transitions, 777 flow [2024-06-21 21:09:27,186 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 90 places, 85 transitions, 721 flow, removed 11 selfloop flow, removed 6 redundant places. [2024-06-21 21:09:27,187 INFO L231 Difference]: Finished difference. Result has 91 places, 76 transitions, 564 flow [2024-06-21 21:09:27,187 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=533, PETRI_DIFFERENCE_MINUEND_PLACES=83, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=76, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=63, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=564, PETRI_PLACES=91, PETRI_TRANSITIONS=76} [2024-06-21 21:09:27,188 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 61 predicate places. [2024-06-21 21:09:27,188 INFO L495 AbstractCegarLoop]: Abstraction has has 91 places, 76 transitions, 564 flow [2024-06-21 21:09:27,188 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 7.333333333333333) internal successors, (66), 9 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:09:27,188 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:09:27,188 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:09:27,188 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2024-06-21 21:09:27,188 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 21:09:27,189 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:09:27,189 INFO L85 PathProgramCache]: Analyzing trace with hash -60466369, now seen corresponding path program 1 times [2024-06-21 21:09:27,189 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:09:27,189 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [458185192] [2024-06-21 21:09:27,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:09:27,189 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:09:27,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:09:27,901 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:09:27,901 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:09:27,902 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [458185192] [2024-06-21 21:09:27,902 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [458185192] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:09:27,902 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:09:27,902 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 21:09:27,902 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1265384431] [2024-06-21 21:09:27,902 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:09:27,902 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 21:09:27,903 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:09:27,903 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 21:09:27,903 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-21 21:09:27,993 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 31 [2024-06-21 21:09:27,993 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 91 places, 76 transitions, 564 flow. Second operand has 9 states, 9 states have (on average 8.444444444444445) internal successors, (76), 9 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:09:27,993 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:09:27,993 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 31 [2024-06-21 21:09:27,994 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:09:28,166 INFO L124 PetriNetUnfolderBase]: 255/464 cut-off events. [2024-06-21 21:09:28,166 INFO L125 PetriNetUnfolderBase]: For 8997/8997 co-relation queries the response was YES. [2024-06-21 21:09:28,167 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2473 conditions, 464 events. 255/464 cut-off events. For 8997/8997 co-relation queries the response was YES. Maximal size of possible extension queue 31. Compared 1778 event pairs, 30 based on Foata normal form. 2/464 useless extension candidates. Maximal degree in co-relation 2427. Up to 335 conditions per place. [2024-06-21 21:09:28,169 INFO L140 encePairwiseOnDemand]: 23/31 looper letters, 62 selfloop transitions, 21 changer transitions 0/93 dead transitions. [2024-06-21 21:09:28,169 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 98 places, 93 transitions, 826 flow [2024-06-21 21:09:28,169 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 21:09:28,169 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 21:09:28,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 104 transitions. [2024-06-21 21:09:28,170 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41935483870967744 [2024-06-21 21:09:28,170 INFO L175 Difference]: Start difference. First operand has 91 places, 76 transitions, 564 flow. Second operand 8 states and 104 transitions. [2024-06-21 21:09:28,170 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 98 places, 93 transitions, 826 flow [2024-06-21 21:09:28,177 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 90 places, 93 transitions, 785 flow, removed 1 selfloop flow, removed 8 redundant places. [2024-06-21 21:09:28,178 INFO L231 Difference]: Finished difference. Result has 91 places, 77 transitions, 579 flow [2024-06-21 21:09:28,179 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=523, PETRI_DIFFERENCE_MINUEND_PLACES=83, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=76, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=56, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=579, PETRI_PLACES=91, PETRI_TRANSITIONS=77} [2024-06-21 21:09:28,179 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 61 predicate places. [2024-06-21 21:09:28,179 INFO L495 AbstractCegarLoop]: Abstraction has has 91 places, 77 transitions, 579 flow [2024-06-21 21:09:28,179 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.444444444444445) internal successors, (76), 9 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:09:28,179 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:09:28,179 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:09:28,180 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2024-06-21 21:09:28,180 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 21:09:28,180 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:09:28,180 INFO L85 PathProgramCache]: Analyzing trace with hash 1650950083, now seen corresponding path program 2 times [2024-06-21 21:09:28,180 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:09:28,180 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1813370693] [2024-06-21 21:09:28,180 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:09:28,181 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:09:28,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:09:28,840 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:09:28,840 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:09:28,840 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1813370693] [2024-06-21 21:09:28,840 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1813370693] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:09:28,840 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:09:28,840 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 21:09:28,840 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [506789556] [2024-06-21 21:09:28,841 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:09:28,841 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 21:09:28,841 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:09:28,841 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 21:09:28,842 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-21 21:09:28,917 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 31 [2024-06-21 21:09:28,918 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 91 places, 77 transitions, 579 flow. Second operand has 9 states, 9 states have (on average 8.444444444444445) internal successors, (76), 9 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:09:28,918 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:09:28,918 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 31 [2024-06-21 21:09:28,918 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:09:29,138 INFO L124 PetriNetUnfolderBase]: 259/472 cut-off events. [2024-06-21 21:09:29,138 INFO L125 PetriNetUnfolderBase]: For 9828/9828 co-relation queries the response was YES. [2024-06-21 21:09:29,139 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2555 conditions, 472 events. 259/472 cut-off events. For 9828/9828 co-relation queries the response was YES. Maximal size of possible extension queue 33. Compared 1831 event pairs, 48 based on Foata normal form. 2/472 useless extension candidates. Maximal degree in co-relation 2509. Up to 380 conditions per place. [2024-06-21 21:09:29,141 INFO L140 encePairwiseOnDemand]: 23/31 looper letters, 63 selfloop transitions, 19 changer transitions 0/92 dead transitions. [2024-06-21 21:09:29,141 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 98 places, 92 transitions, 793 flow [2024-06-21 21:09:29,142 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 21:09:29,142 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 21:09:29,144 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 104 transitions. [2024-06-21 21:09:29,144 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41935483870967744 [2024-06-21 21:09:29,144 INFO L175 Difference]: Start difference. First operand has 91 places, 77 transitions, 579 flow. Second operand 8 states and 104 transitions. [2024-06-21 21:09:29,144 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 98 places, 92 transitions, 793 flow [2024-06-21 21:09:29,154 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 93 places, 92 transitions, 742 flow, removed 8 selfloop flow, removed 5 redundant places. [2024-06-21 21:09:29,155 INFO L231 Difference]: Finished difference. Result has 94 places, 78 transitions, 584 flow [2024-06-21 21:09:29,155 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=533, PETRI_DIFFERENCE_MINUEND_PLACES=86, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=77, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=584, PETRI_PLACES=94, PETRI_TRANSITIONS=78} [2024-06-21 21:09:29,155 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 64 predicate places. [2024-06-21 21:09:29,156 INFO L495 AbstractCegarLoop]: Abstraction has has 94 places, 78 transitions, 584 flow [2024-06-21 21:09:29,156 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.444444444444445) internal successors, (76), 9 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:09:29,156 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:09:29,156 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:09:29,156 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2024-06-21 21:09:29,156 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 21:09:29,156 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:09:29,156 INFO L85 PathProgramCache]: Analyzing trace with hash 1650950207, now seen corresponding path program 1 times [2024-06-21 21:09:29,157 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:09:29,157 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [826393485] [2024-06-21 21:09:29,157 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:09:29,157 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:09:29,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:09:29,912 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:09:29,912 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:09:29,912 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [826393485] [2024-06-21 21:09:29,912 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [826393485] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:09:29,913 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:09:29,913 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 21:09:29,913 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2069210455] [2024-06-21 21:09:29,913 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:09:29,913 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 21:09:29,913 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:09:29,914 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 21:09:29,914 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-21 21:09:29,974 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 21:09:29,974 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 94 places, 78 transitions, 584 flow. Second operand has 9 states, 9 states have (on average 7.444444444444445) internal successors, (67), 9 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:09:29,974 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:09:29,974 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 21:09:29,974 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:09:30,247 INFO L124 PetriNetUnfolderBase]: 275/490 cut-off events. [2024-06-21 21:09:30,247 INFO L125 PetriNetUnfolderBase]: For 10264/10264 co-relation queries the response was YES. [2024-06-21 21:09:30,248 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2635 conditions, 490 events. 275/490 cut-off events. For 10264/10264 co-relation queries the response was YES. Maximal size of possible extension queue 33. Compared 1876 event pairs, 50 based on Foata normal form. 1/489 useless extension candidates. Maximal degree in co-relation 2588. Up to 386 conditions per place. [2024-06-21 21:09:30,250 INFO L140 encePairwiseOnDemand]: 21/31 looper letters, 62 selfloop transitions, 34 changer transitions 0/98 dead transitions. [2024-06-21 21:09:30,250 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 103 places, 98 transitions, 890 flow [2024-06-21 21:09:30,251 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 21:09:30,251 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 21:09:30,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 121 transitions. [2024-06-21 21:09:30,252 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3903225806451613 [2024-06-21 21:09:30,252 INFO L175 Difference]: Start difference. First operand has 94 places, 78 transitions, 584 flow. Second operand 10 states and 121 transitions. [2024-06-21 21:09:30,252 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 103 places, 98 transitions, 890 flow [2024-06-21 21:09:30,261 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 96 places, 98 transitions, 839 flow, removed 4 selfloop flow, removed 7 redundant places. [2024-06-21 21:09:30,265 INFO L231 Difference]: Finished difference. Result has 97 places, 82 transitions, 636 flow [2024-06-21 21:09:30,266 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=533, PETRI_DIFFERENCE_MINUEND_PLACES=87, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=78, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=636, PETRI_PLACES=97, PETRI_TRANSITIONS=82} [2024-06-21 21:09:30,266 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 67 predicate places. [2024-06-21 21:09:30,266 INFO L495 AbstractCegarLoop]: Abstraction has has 97 places, 82 transitions, 636 flow [2024-06-21 21:09:30,266 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 7.444444444444445) internal successors, (67), 9 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:09:30,266 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:09:30,266 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:09:30,267 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2024-06-21 21:09:30,267 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 21:09:30,267 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:09:30,267 INFO L85 PathProgramCache]: Analyzing trace with hash 1653746593, now seen corresponding path program 3 times [2024-06-21 21:09:30,267 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:09:30,267 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [535409534] [2024-06-21 21:09:30,267 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:09:30,268 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:09:30,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:09:30,922 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:09:30,923 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:09:30,923 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [535409534] [2024-06-21 21:09:30,923 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [535409534] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:09:30,923 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:09:30,923 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 21:09:30,923 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1833966417] [2024-06-21 21:09:30,923 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:09:30,923 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 21:09:30,924 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:09:30,924 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 21:09:30,924 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-21 21:09:31,020 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 31 [2024-06-21 21:09:31,021 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 97 places, 82 transitions, 636 flow. Second operand has 9 states, 9 states have (on average 8.444444444444445) internal successors, (76), 9 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:09:31,021 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:09:31,021 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 31 [2024-06-21 21:09:31,021 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:09:31,170 INFO L124 PetriNetUnfolderBase]: 262/475 cut-off events. [2024-06-21 21:09:31,171 INFO L125 PetriNetUnfolderBase]: For 10865/10865 co-relation queries the response was YES. [2024-06-21 21:09:31,181 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2566 conditions, 475 events. 262/475 cut-off events. For 10865/10865 co-relation queries the response was YES. Maximal size of possible extension queue 34. Compared 1826 event pairs, 50 based on Foata normal form. 2/475 useless extension candidates. Maximal degree in co-relation 2519. Up to 396 conditions per place. [2024-06-21 21:09:31,183 INFO L140 encePairwiseOnDemand]: 22/31 looper letters, 64 selfloop transitions, 17 changer transitions 0/93 dead transitions. [2024-06-21 21:09:31,183 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 104 places, 93 transitions, 826 flow [2024-06-21 21:09:31,184 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 21:09:31,184 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 21:09:31,184 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 101 transitions. [2024-06-21 21:09:31,184 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40725806451612906 [2024-06-21 21:09:31,184 INFO L175 Difference]: Start difference. First operand has 97 places, 82 transitions, 636 flow. Second operand 8 states and 101 transitions. [2024-06-21 21:09:31,185 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 104 places, 93 transitions, 826 flow [2024-06-21 21:09:31,193 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 98 places, 93 transitions, 772 flow, removed 7 selfloop flow, removed 6 redundant places. [2024-06-21 21:09:31,194 INFO L231 Difference]: Finished difference. Result has 99 places, 82 transitions, 620 flow [2024-06-21 21:09:31,194 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=582, PETRI_DIFFERENCE_MINUEND_PLACES=91, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=82, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=65, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=620, PETRI_PLACES=99, PETRI_TRANSITIONS=82} [2024-06-21 21:09:31,195 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 69 predicate places. [2024-06-21 21:09:31,195 INFO L495 AbstractCegarLoop]: Abstraction has has 99 places, 82 transitions, 620 flow [2024-06-21 21:09:31,195 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.444444444444445) internal successors, (76), 9 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:09:31,195 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:09:31,195 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:09:31,195 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2024-06-21 21:09:31,195 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 21:09:31,196 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:09:31,196 INFO L85 PathProgramCache]: Analyzing trace with hash 1791868871, now seen corresponding path program 2 times [2024-06-21 21:09:31,196 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:09:31,196 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1096403704] [2024-06-21 21:09:31,196 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:09:31,197 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:09:31,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:09:31,876 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:09:31,877 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:09:31,877 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1096403704] [2024-06-21 21:09:31,877 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1096403704] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:09:31,877 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:09:31,877 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 21:09:31,877 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1689546078] [2024-06-21 21:09:31,877 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:09:31,879 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 21:09:31,879 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:09:31,880 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 21:09:31,880 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-21 21:09:31,946 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 21:09:31,947 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 99 places, 82 transitions, 620 flow. Second operand has 9 states, 9 states have (on average 7.444444444444445) internal successors, (67), 9 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:09:31,947 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:09:31,947 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 21:09:31,947 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:09:32,175 INFO L124 PetriNetUnfolderBase]: 275/490 cut-off events. [2024-06-21 21:09:32,175 INFO L125 PetriNetUnfolderBase]: For 11205/11205 co-relation queries the response was YES. [2024-06-21 21:09:32,176 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2655 conditions, 490 events. 275/490 cut-off events. For 11205/11205 co-relation queries the response was YES. Maximal size of possible extension queue 34. Compared 1865 event pairs, 49 based on Foata normal form. 1/489 useless extension candidates. Maximal degree in co-relation 2606. Up to 398 conditions per place. [2024-06-21 21:09:32,186 INFO L140 encePairwiseOnDemand]: 21/31 looper letters, 66 selfloop transitions, 34 changer transitions 0/102 dead transitions. [2024-06-21 21:09:32,186 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 107 places, 102 transitions, 936 flow [2024-06-21 21:09:32,186 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 21:09:32,186 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 21:09:32,187 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 115 transitions. [2024-06-21 21:09:32,187 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4121863799283154 [2024-06-21 21:09:32,187 INFO L175 Difference]: Start difference. First operand has 99 places, 82 transitions, 620 flow. Second operand 9 states and 115 transitions. [2024-06-21 21:09:32,187 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 107 places, 102 transitions, 936 flow [2024-06-21 21:09:32,197 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 100 places, 102 transitions, 893 flow, removed 2 selfloop flow, removed 7 redundant places. [2024-06-21 21:09:32,199 INFO L231 Difference]: Finished difference. Result has 101 places, 84 transitions, 665 flow [2024-06-21 21:09:32,199 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=577, PETRI_DIFFERENCE_MINUEND_PLACES=92, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=82, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=50, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=665, PETRI_PLACES=101, PETRI_TRANSITIONS=84} [2024-06-21 21:09:32,199 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 71 predicate places. [2024-06-21 21:09:32,199 INFO L495 AbstractCegarLoop]: Abstraction has has 101 places, 84 transitions, 665 flow [2024-06-21 21:09:32,199 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 7.444444444444445) internal successors, (67), 9 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:09:32,200 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:09:32,200 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:09:32,200 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2024-06-21 21:09:32,200 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 21:09:32,200 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:09:32,200 INFO L85 PathProgramCache]: Analyzing trace with hash 1791873707, now seen corresponding path program 1 times [2024-06-21 21:09:32,200 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:09:32,200 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [218959913] [2024-06-21 21:09:32,201 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:09:32,201 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:09:32,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:09:32,745 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:09:32,746 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:09:32,746 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [218959913] [2024-06-21 21:09:32,746 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [218959913] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:09:32,747 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:09:32,747 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 21:09:32,747 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2066832217] [2024-06-21 21:09:32,747 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:09:32,748 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 21:09:32,748 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:09:32,748 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 21:09:32,748 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-21 21:09:32,801 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 21:09:32,801 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 101 places, 84 transitions, 665 flow. Second operand has 9 states, 9 states have (on average 7.444444444444445) internal successors, (67), 9 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:09:32,801 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:09:32,801 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 21:09:32,801 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:09:33,012 INFO L124 PetriNetUnfolderBase]: 284/505 cut-off events. [2024-06-21 21:09:33,012 INFO L125 PetriNetUnfolderBase]: For 12805/12805 co-relation queries the response was YES. [2024-06-21 21:09:33,014 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2766 conditions, 505 events. 284/505 cut-off events. For 12805/12805 co-relation queries the response was YES. Maximal size of possible extension queue 36. Compared 1940 event pairs, 50 based on Foata normal form. 3/506 useless extension candidates. Maximal degree in co-relation 2716. Up to 339 conditions per place. [2024-06-21 21:09:33,016 INFO L140 encePairwiseOnDemand]: 20/31 looper letters, 68 selfloop transitions, 36 changer transitions 0/106 dead transitions. [2024-06-21 21:09:33,016 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 108 places, 106 transitions, 997 flow [2024-06-21 21:09:33,016 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 21:09:33,017 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 21:09:33,017 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 110 transitions. [2024-06-21 21:09:33,017 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4435483870967742 [2024-06-21 21:09:33,017 INFO L175 Difference]: Start difference. First operand has 101 places, 84 transitions, 665 flow. Second operand 8 states and 110 transitions. [2024-06-21 21:09:33,018 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 108 places, 106 transitions, 997 flow [2024-06-21 21:09:33,030 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 101 places, 106 transitions, 925 flow, removed 3 selfloop flow, removed 7 redundant places. [2024-06-21 21:09:33,031 INFO L231 Difference]: Finished difference. Result has 102 places, 86 transitions, 684 flow [2024-06-21 21:09:33,031 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=593, PETRI_DIFFERENCE_MINUEND_PLACES=94, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=84, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=50, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=684, PETRI_PLACES=102, PETRI_TRANSITIONS=86} [2024-06-21 21:09:33,036 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 72 predicate places. [2024-06-21 21:09:33,036 INFO L495 AbstractCegarLoop]: Abstraction has has 102 places, 86 transitions, 684 flow [2024-06-21 21:09:33,036 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 7.444444444444445) internal successors, (67), 9 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:09:33,036 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:09:33,036 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:09:33,037 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2024-06-21 21:09:33,037 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 21:09:33,037 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:09:33,037 INFO L85 PathProgramCache]: Analyzing trace with hash 1769215517, now seen corresponding path program 3 times [2024-06-21 21:09:33,037 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:09:33,037 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1785254578] [2024-06-21 21:09:33,037 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:09:33,037 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:09:33,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:09:33,680 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:09:33,680 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:09:33,681 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1785254578] [2024-06-21 21:09:33,681 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1785254578] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:09:33,681 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:09:33,681 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 21:09:33,681 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1280604259] [2024-06-21 21:09:33,681 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:09:33,681 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 21:09:33,682 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:09:33,682 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 21:09:33,682 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-21 21:09:33,738 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 21:09:33,739 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 102 places, 86 transitions, 684 flow. Second operand has 9 states, 9 states have (on average 7.444444444444445) internal successors, (67), 9 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:09:33,739 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:09:33,739 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 21:09:33,739 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:09:33,937 INFO L124 PetriNetUnfolderBase]: 287/510 cut-off events. [2024-06-21 21:09:33,937 INFO L125 PetriNetUnfolderBase]: For 13031/13031 co-relation queries the response was YES. [2024-06-21 21:09:33,938 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2851 conditions, 510 events. 287/510 cut-off events. For 13031/13031 co-relation queries the response was YES. Maximal size of possible extension queue 37. Compared 1965 event pairs, 49 based on Foata normal form. 1/509 useless extension candidates. Maximal degree in co-relation 2800. Up to 438 conditions per place. [2024-06-21 21:09:33,940 INFO L140 encePairwiseOnDemand]: 22/31 looper letters, 70 selfloop transitions, 26 changer transitions 0/98 dead transitions. [2024-06-21 21:09:33,940 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 109 places, 98 transitions, 916 flow [2024-06-21 21:09:33,940 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 21:09:33,940 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 21:09:33,941 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 96 transitions. [2024-06-21 21:09:33,941 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3870967741935484 [2024-06-21 21:09:33,941 INFO L175 Difference]: Start difference. First operand has 102 places, 86 transitions, 684 flow. Second operand 8 states and 96 transitions. [2024-06-21 21:09:33,941 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 109 places, 98 transitions, 916 flow [2024-06-21 21:09:33,953 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 103 places, 98 transitions, 835 flow, removed 4 selfloop flow, removed 6 redundant places. [2024-06-21 21:09:33,954 INFO L231 Difference]: Finished difference. Result has 104 places, 88 transitions, 678 flow [2024-06-21 21:09:33,954 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=603, PETRI_DIFFERENCE_MINUEND_PLACES=96, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=86, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=60, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=678, PETRI_PLACES=104, PETRI_TRANSITIONS=88} [2024-06-21 21:09:33,955 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 74 predicate places. [2024-06-21 21:09:33,955 INFO L495 AbstractCegarLoop]: Abstraction has has 104 places, 88 transitions, 678 flow [2024-06-21 21:09:33,955 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 7.444444444444445) internal successors, (67), 9 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:09:33,955 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:09:33,955 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:09:33,956 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2024-06-21 21:09:33,956 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 21:09:33,956 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:09:33,956 INFO L85 PathProgramCache]: Analyzing trace with hash -147871799, now seen corresponding path program 2 times [2024-06-21 21:09:33,956 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:09:33,956 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [786906182] [2024-06-21 21:09:33,956 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:09:33,956 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:09:33,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:09:34,573 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:09:34,573 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:09:34,573 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [786906182] [2024-06-21 21:09:34,573 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [786906182] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:09:34,574 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:09:34,574 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 21:09:34,574 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [584885136] [2024-06-21 21:09:34,574 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:09:34,574 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 21:09:34,574 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:09:34,574 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 21:09:34,574 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-21 21:09:34,648 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 21:09:34,648 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 104 places, 88 transitions, 678 flow. Second operand has 9 states, 9 states have (on average 7.444444444444445) internal successors, (67), 9 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:09:34,648 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:09:34,648 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 21:09:34,648 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:09:34,849 INFO L124 PetriNetUnfolderBase]: 311/549 cut-off events. [2024-06-21 21:09:34,850 INFO L125 PetriNetUnfolderBase]: For 15911/15911 co-relation queries the response was YES. [2024-06-21 21:09:34,851 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3057 conditions, 549 events. 311/549 cut-off events. For 15911/15911 co-relation queries the response was YES. Maximal size of possible extension queue 40. Compared 2174 event pairs, 50 based on Foata normal form. 3/550 useless extension candidates. Maximal degree in co-relation 3005. Up to 364 conditions per place. [2024-06-21 21:09:34,852 INFO L140 encePairwiseOnDemand]: 21/31 looper letters, 75 selfloop transitions, 35 changer transitions 0/112 dead transitions. [2024-06-21 21:09:34,852 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 111 places, 112 transitions, 1092 flow [2024-06-21 21:09:34,860 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 21:09:34,860 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 21:09:34,860 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 110 transitions. [2024-06-21 21:09:34,861 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4435483870967742 [2024-06-21 21:09:34,861 INFO L175 Difference]: Start difference. First operand has 104 places, 88 transitions, 678 flow. Second operand 8 states and 110 transitions. [2024-06-21 21:09:34,861 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 111 places, 112 transitions, 1092 flow [2024-06-21 21:09:34,889 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 105 places, 112 transitions, 1037 flow, removed 3 selfloop flow, removed 6 redundant places. [2024-06-21 21:09:34,890 INFO L231 Difference]: Finished difference. Result has 106 places, 92 transitions, 722 flow [2024-06-21 21:09:34,890 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=623, PETRI_DIFFERENCE_MINUEND_PLACES=98, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=88, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=722, PETRI_PLACES=106, PETRI_TRANSITIONS=92} [2024-06-21 21:09:34,891 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 76 predicate places. [2024-06-21 21:09:34,891 INFO L495 AbstractCegarLoop]: Abstraction has has 106 places, 92 transitions, 722 flow [2024-06-21 21:09:34,891 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 7.444444444444445) internal successors, (67), 9 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:09:34,891 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:09:34,891 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:09:34,891 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2024-06-21 21:09:34,891 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 21:09:34,892 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:09:34,892 INFO L85 PathProgramCache]: Analyzing trace with hash 1792053197, now seen corresponding path program 3 times [2024-06-21 21:09:34,892 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:09:34,892 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [492211085] [2024-06-21 21:09:34,892 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:09:34,892 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:09:34,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:09:35,443 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:09:35,443 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:09:35,443 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [492211085] [2024-06-21 21:09:35,443 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [492211085] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:09:35,443 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:09:35,443 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 21:09:35,444 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1481418530] [2024-06-21 21:09:35,444 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:09:35,444 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 21:09:35,445 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:09:35,446 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 21:09:35,446 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-21 21:09:35,535 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 21:09:35,536 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 106 places, 92 transitions, 722 flow. Second operand has 9 states, 9 states have (on average 7.444444444444445) internal successors, (67), 9 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:09:35,536 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:09:35,536 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 21:09:35,536 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:09:35,718 INFO L124 PetriNetUnfolderBase]: 305/540 cut-off events. [2024-06-21 21:09:35,718 INFO L125 PetriNetUnfolderBase]: For 15718/15718 co-relation queries the response was YES. [2024-06-21 21:09:35,719 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3029 conditions, 540 events. 305/540 cut-off events. For 15718/15718 co-relation queries the response was YES. Maximal size of possible extension queue 40. Compared 2139 event pairs, 50 based on Foata normal form. 3/541 useless extension candidates. Maximal degree in co-relation 2976. Up to 360 conditions per place. [2024-06-21 21:09:35,721 INFO L140 encePairwiseOnDemand]: 21/31 looper letters, 71 selfloop transitions, 36 changer transitions 0/109 dead transitions. [2024-06-21 21:09:35,721 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 113 places, 109 transitions, 1042 flow [2024-06-21 21:09:35,721 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 21:09:35,721 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 21:09:35,722 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 106 transitions. [2024-06-21 21:09:35,722 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4274193548387097 [2024-06-21 21:09:35,722 INFO L175 Difference]: Start difference. First operand has 106 places, 92 transitions, 722 flow. Second operand 8 states and 106 transitions. [2024-06-21 21:09:35,722 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 113 places, 109 transitions, 1042 flow [2024-06-21 21:09:35,736 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 109 places, 109 transitions, 992 flow, removed 3 selfloop flow, removed 4 redundant places. [2024-06-21 21:09:35,738 INFO L231 Difference]: Finished difference. Result has 110 places, 92 transitions, 750 flow [2024-06-21 21:09:35,738 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=672, PETRI_DIFFERENCE_MINUEND_PLACES=102, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=92, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=56, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=750, PETRI_PLACES=110, PETRI_TRANSITIONS=92} [2024-06-21 21:09:35,738 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 80 predicate places. [2024-06-21 21:09:35,738 INFO L495 AbstractCegarLoop]: Abstraction has has 110 places, 92 transitions, 750 flow [2024-06-21 21:09:35,739 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 7.444444444444445) internal successors, (67), 9 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:09:35,739 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:09:35,739 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:09:35,739 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2024-06-21 21:09:35,739 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 21:09:35,739 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:09:35,739 INFO L85 PathProgramCache]: Analyzing trace with hash -639370469, now seen corresponding path program 4 times [2024-06-21 21:09:35,740 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:09:35,740 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [563581738] [2024-06-21 21:09:35,740 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:09:35,740 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:09:35,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:09:36,285 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:09:36,286 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:09:36,286 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [563581738] [2024-06-21 21:09:36,286 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [563581738] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:09:36,286 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:09:36,286 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 21:09:36,286 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2073391419] [2024-06-21 21:09:36,286 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:09:36,286 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 21:09:36,286 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:09:36,287 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 21:09:36,287 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-21 21:09:36,340 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 21:09:36,340 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 110 places, 92 transitions, 750 flow. Second operand has 9 states, 9 states have (on average 7.444444444444445) internal successors, (67), 9 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:09:36,340 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:09:36,340 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 21:09:36,340 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:09:36,559 INFO L124 PetriNetUnfolderBase]: 314/555 cut-off events. [2024-06-21 21:09:36,560 INFO L125 PetriNetUnfolderBase]: For 16938/16938 co-relation queries the response was YES. [2024-06-21 21:09:36,561 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3148 conditions, 555 events. 314/555 cut-off events. For 16938/16938 co-relation queries the response was YES. Maximal size of possible extension queue 42. Compared 2220 event pairs, 50 based on Foata normal form. 3/556 useless extension candidates. Maximal degree in co-relation 3094. Up to 481 conditions per place. [2024-06-21 21:09:36,563 INFO L140 encePairwiseOnDemand]: 21/31 looper letters, 86 selfloop transitions, 20 changer transitions 0/108 dead transitions. [2024-06-21 21:09:36,563 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 117 places, 108 transitions, 1078 flow [2024-06-21 21:09:36,563 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 21:09:36,563 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 21:09:36,564 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 98 transitions. [2024-06-21 21:09:36,564 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3951612903225806 [2024-06-21 21:09:36,564 INFO L175 Difference]: Start difference. First operand has 110 places, 92 transitions, 750 flow. Second operand 8 states and 98 transitions. [2024-06-21 21:09:36,564 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 117 places, 108 transitions, 1078 flow [2024-06-21 21:09:36,582 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 110 places, 108 transitions, 996 flow, removed 1 selfloop flow, removed 7 redundant places. [2024-06-21 21:09:36,584 INFO L231 Difference]: Finished difference. Result has 111 places, 94 transitions, 731 flow [2024-06-21 21:09:36,584 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=672, PETRI_DIFFERENCE_MINUEND_PLACES=103, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=92, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=74, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=731, PETRI_PLACES=111, PETRI_TRANSITIONS=94} [2024-06-21 21:09:36,584 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 81 predicate places. [2024-06-21 21:09:36,584 INFO L495 AbstractCegarLoop]: Abstraction has has 111 places, 94 transitions, 731 flow [2024-06-21 21:09:36,584 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 7.444444444444445) internal successors, (67), 9 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:09:36,585 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:09:36,585 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:09:36,585 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2024-06-21 21:09:36,585 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 21:09:36,585 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:09:36,585 INFO L85 PathProgramCache]: Analyzing trace with hash 105027147, now seen corresponding path program 4 times [2024-06-21 21:09:36,585 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:09:36,586 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [585889977] [2024-06-21 21:09:36,586 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:09:36,586 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:09:36,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:09:37,271 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:09:37,272 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:09:37,272 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [585889977] [2024-06-21 21:09:37,272 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [585889977] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:09:37,272 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:09:37,272 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 21:09:37,272 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1878984316] [2024-06-21 21:09:37,272 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:09:37,273 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 21:09:37,273 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:09:37,273 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 21:09:37,273 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-21 21:09:37,341 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 21:09:37,342 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 111 places, 94 transitions, 731 flow. Second operand has 9 states, 9 states have (on average 7.444444444444445) internal successors, (67), 9 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:09:37,342 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:09:37,342 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 21:09:37,342 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:09:37,528 INFO L124 PetriNetUnfolderBase]: 312/552 cut-off events. [2024-06-21 21:09:37,528 INFO L125 PetriNetUnfolderBase]: For 16305/16305 co-relation queries the response was YES. [2024-06-21 21:09:37,529 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3070 conditions, 552 events. 312/552 cut-off events. For 16305/16305 co-relation queries the response was YES. Maximal size of possible extension queue 42. Compared 2207 event pairs, 56 based on Foata normal form. 1/551 useless extension candidates. Maximal degree in co-relation 3015. Up to 529 conditions per place. [2024-06-21 21:09:37,531 INFO L140 encePairwiseOnDemand]: 22/31 looper letters, 85 selfloop transitions, 14 changer transitions 0/101 dead transitions. [2024-06-21 21:09:37,531 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 118 places, 101 transitions, 945 flow [2024-06-21 21:09:37,531 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 21:09:37,532 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 21:09:37,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 88 transitions. [2024-06-21 21:09:37,532 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3548387096774194 [2024-06-21 21:09:37,532 INFO L175 Difference]: Start difference. First operand has 111 places, 94 transitions, 731 flow. Second operand 8 states and 88 transitions. [2024-06-21 21:09:37,532 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 118 places, 101 transitions, 945 flow [2024-06-21 21:09:37,550 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 111 places, 101 transitions, 869 flow, removed 3 selfloop flow, removed 7 redundant places. [2024-06-21 21:09:37,551 INFO L231 Difference]: Finished difference. Result has 112 places, 94 transitions, 688 flow [2024-06-21 21:09:37,551 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=655, PETRI_DIFFERENCE_MINUEND_PLACES=104, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=94, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=80, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=688, PETRI_PLACES=112, PETRI_TRANSITIONS=94} [2024-06-21 21:09:37,551 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 82 predicate places. [2024-06-21 21:09:37,552 INFO L495 AbstractCegarLoop]: Abstraction has has 112 places, 94 transitions, 688 flow [2024-06-21 21:09:37,552 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 7.444444444444445) internal successors, (67), 9 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:09:37,552 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:09:37,552 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:09:37,552 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2024-06-21 21:09:37,552 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 21:09:37,552 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:09:37,553 INFO L85 PathProgramCache]: Analyzing trace with hash -639363959, now seen corresponding path program 5 times [2024-06-21 21:09:37,553 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:09:37,553 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [595936463] [2024-06-21 21:09:37,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:09:37,553 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:09:37,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:09:38,022 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:09:38,022 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:09:38,022 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [595936463] [2024-06-21 21:09:38,022 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [595936463] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:09:38,023 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:09:38,023 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 21:09:38,023 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1260442977] [2024-06-21 21:09:38,023 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:09:38,023 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 21:09:38,024 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:09:38,024 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 21:09:38,024 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-21 21:09:38,097 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 21:09:38,097 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 112 places, 94 transitions, 688 flow. Second operand has 9 states, 9 states have (on average 7.444444444444445) internal successors, (67), 9 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:09:38,097 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:09:38,098 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 21:09:38,098 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:09:38,268 INFO L124 PetriNetUnfolderBase]: 321/567 cut-off events. [2024-06-21 21:09:38,268 INFO L125 PetriNetUnfolderBase]: For 18275/18275 co-relation queries the response was YES. [2024-06-21 21:09:38,270 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3077 conditions, 567 events. 321/567 cut-off events. For 18275/18275 co-relation queries the response was YES. Maximal size of possible extension queue 44. Compared 2281 event pairs, 56 based on Foata normal form. 3/568 useless extension candidates. Maximal degree in co-relation 3021. Up to 486 conditions per place. [2024-06-21 21:09:38,271 INFO L140 encePairwiseOnDemand]: 21/31 looper letters, 87 selfloop transitions, 21 changer transitions 0/110 dead transitions. [2024-06-21 21:09:38,271 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 119 places, 110 transitions, 1018 flow [2024-06-21 21:09:38,272 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 21:09:38,272 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 21:09:38,272 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 99 transitions. [2024-06-21 21:09:38,272 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39919354838709675 [2024-06-21 21:09:38,272 INFO L175 Difference]: Start difference. First operand has 112 places, 94 transitions, 688 flow. Second operand 8 states and 99 transitions. [2024-06-21 21:09:38,272 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 119 places, 110 transitions, 1018 flow [2024-06-21 21:09:38,288 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 111 places, 110 transitions, 964 flow, removed 4 selfloop flow, removed 8 redundant places. [2024-06-21 21:09:38,289 INFO L231 Difference]: Finished difference. Result has 112 places, 96 transitions, 693 flow [2024-06-21 21:09:38,290 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=634, PETRI_DIFFERENCE_MINUEND_PLACES=104, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=94, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=75, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=693, PETRI_PLACES=112, PETRI_TRANSITIONS=96} [2024-06-21 21:09:38,290 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 82 predicate places. [2024-06-21 21:09:38,290 INFO L495 AbstractCegarLoop]: Abstraction has has 112 places, 96 transitions, 693 flow [2024-06-21 21:09:38,290 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 7.444444444444445) internal successors, (67), 9 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:09:38,290 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:09:38,290 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:09:38,291 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2024-06-21 21:09:38,291 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 21:09:38,291 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:09:38,291 INFO L85 PathProgramCache]: Analyzing trace with hash -631089749, now seen corresponding path program 6 times [2024-06-21 21:09:38,291 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:09:38,291 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [446798147] [2024-06-21 21:09:38,291 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:09:38,292 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:09:38,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:09:38,782 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:09:38,782 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:09:38,783 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [446798147] [2024-06-21 21:09:38,783 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [446798147] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:09:38,783 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:09:38,783 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 21:09:38,783 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1761019384] [2024-06-21 21:09:38,783 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:09:38,783 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 21:09:38,783 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:09:38,784 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 21:09:38,784 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-21 21:09:38,851 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 21:09:38,851 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 112 places, 96 transitions, 693 flow. Second operand has 9 states, 9 states have (on average 7.444444444444445) internal successors, (67), 9 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:09:38,851 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:09:38,851 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 21:09:38,851 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:09:39,066 INFO L124 PetriNetUnfolderBase]: 315/558 cut-off events. [2024-06-21 21:09:39,066 INFO L125 PetriNetUnfolderBase]: For 17649/17649 co-relation queries the response was YES. [2024-06-21 21:09:39,068 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2972 conditions, 558 events. 315/558 cut-off events. For 17649/17649 co-relation queries the response was YES. Maximal size of possible extension queue 44. Compared 2241 event pairs, 54 based on Foata normal form. 3/559 useless extension candidates. Maximal degree in co-relation 2916. Up to 519 conditions per place. [2024-06-21 21:09:39,069 INFO L140 encePairwiseOnDemand]: 21/31 looper letters, 91 selfloop transitions, 14 changer transitions 0/107 dead transitions. [2024-06-21 21:09:39,069 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 119 places, 107 transitions, 931 flow [2024-06-21 21:09:39,069 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 21:09:39,070 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 21:09:39,070 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 92 transitions. [2024-06-21 21:09:39,070 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3709677419354839 [2024-06-21 21:09:39,070 INFO L175 Difference]: Start difference. First operand has 112 places, 96 transitions, 693 flow. Second operand 8 states and 92 transitions. [2024-06-21 21:09:39,070 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 119 places, 107 transitions, 931 flow [2024-06-21 21:09:39,089 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 114 places, 107 transitions, 894 flow, removed 3 selfloop flow, removed 5 redundant places. [2024-06-21 21:09:39,090 INFO L231 Difference]: Finished difference. Result has 115 places, 96 transitions, 689 flow [2024-06-21 21:09:39,090 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=656, PETRI_DIFFERENCE_MINUEND_PLACES=107, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=96, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=82, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=689, PETRI_PLACES=115, PETRI_TRANSITIONS=96} [2024-06-21 21:09:39,091 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 85 predicate places. [2024-06-21 21:09:39,091 INFO L495 AbstractCegarLoop]: Abstraction has has 115 places, 96 transitions, 689 flow [2024-06-21 21:09:39,091 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 7.444444444444445) internal successors, (67), 9 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:09:39,091 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:09:39,091 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:09:39,091 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2024-06-21 21:09:39,091 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 21:09:39,092 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:09:39,092 INFO L85 PathProgramCache]: Analyzing trace with hash -630792831, now seen corresponding path program 1 times [2024-06-21 21:09:39,092 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:09:39,092 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1947832681] [2024-06-21 21:09:39,092 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:09:39,092 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:09:39,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:09:39,675 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:09:39,675 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:09:39,675 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1947832681] [2024-06-21 21:09:39,676 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1947832681] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:09:39,676 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:09:39,676 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 21:09:39,676 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [266110063] [2024-06-21 21:09:39,676 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:09:39,676 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 21:09:39,676 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:09:39,677 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 21:09:39,677 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2024-06-21 21:09:39,757 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 21:09:39,757 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 115 places, 96 transitions, 689 flow. Second operand has 10 states, 10 states have (on average 7.3) internal successors, (73), 10 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:09:39,757 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:09:39,757 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 21:09:39,757 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:09:40,047 INFO L124 PetriNetUnfolderBase]: 311/552 cut-off events. [2024-06-21 21:09:40,047 INFO L125 PetriNetUnfolderBase]: For 16852/16852 co-relation queries the response was YES. [2024-06-21 21:09:40,049 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2892 conditions, 552 events. 311/552 cut-off events. For 16852/16852 co-relation queries the response was YES. Maximal size of possible extension queue 44. Compared 2200 event pairs, 49 based on Foata normal form. 2/552 useless extension candidates. Maximal degree in co-relation 2835. Up to 521 conditions per place. [2024-06-21 21:09:40,050 INFO L140 encePairwiseOnDemand]: 21/31 looper letters, 91 selfloop transitions, 15 changer transitions 0/108 dead transitions. [2024-06-21 21:09:40,050 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 123 places, 108 transitions, 941 flow [2024-06-21 21:09:40,051 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 21:09:40,051 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 21:09:40,052 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 98 transitions. [2024-06-21 21:09:40,052 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.35125448028673834 [2024-06-21 21:09:40,052 INFO L175 Difference]: Start difference. First operand has 115 places, 96 transitions, 689 flow. Second operand 9 states and 98 transitions. [2024-06-21 21:09:40,052 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 123 places, 108 transitions, 941 flow [2024-06-21 21:09:40,072 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 115 places, 108 transitions, 897 flow, removed 1 selfloop flow, removed 8 redundant places. [2024-06-21 21:09:40,073 INFO L231 Difference]: Finished difference. Result has 116 places, 98 transitions, 702 flow [2024-06-21 21:09:40,073 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=645, PETRI_DIFFERENCE_MINUEND_PLACES=107, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=96, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=81, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=702, PETRI_PLACES=116, PETRI_TRANSITIONS=98} [2024-06-21 21:09:40,074 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 86 predicate places. [2024-06-21 21:09:40,074 INFO L495 AbstractCegarLoop]: Abstraction has has 116 places, 98 transitions, 702 flow [2024-06-21 21:09:40,074 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 7.3) internal successors, (73), 10 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:09:40,074 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:09:40,074 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:09:40,074 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2024-06-21 21:09:40,075 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 21:09:40,075 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:09:40,075 INFO L85 PathProgramCache]: Analyzing trace with hash 453235267, now seen corresponding path program 1 times [2024-06-21 21:09:40,075 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:09:40,075 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2140060573] [2024-06-21 21:09:40,075 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:09:40,075 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:09:40,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:09:41,109 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:09:41,109 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:09:41,109 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2140060573] [2024-06-21 21:09:41,110 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2140060573] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:09:41,110 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:09:41,110 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 21:09:41,110 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [249170810] [2024-06-21 21:09:41,110 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:09:41,110 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 21:09:41,110 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:09:41,111 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 21:09:41,111 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2024-06-21 21:09:41,180 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 21:09:41,181 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 116 places, 98 transitions, 702 flow. Second operand has 11 states, 11 states have (on average 7.2727272727272725) internal successors, (80), 11 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:09:41,181 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:09:41,181 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 21:09:41,181 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:09:41,446 INFO L124 PetriNetUnfolderBase]: 308/547 cut-off events. [2024-06-21 21:09:41,446 INFO L125 PetriNetUnfolderBase]: For 16384/16384 co-relation queries the response was YES. [2024-06-21 21:09:41,447 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2832 conditions, 547 events. 308/547 cut-off events. For 16384/16384 co-relation queries the response was YES. Maximal size of possible extension queue 44. Compared 2170 event pairs, 48 based on Foata normal form. 2/547 useless extension candidates. Maximal degree in co-relation 2774. Up to 518 conditions per place. [2024-06-21 21:09:41,449 INFO L140 encePairwiseOnDemand]: 22/31 looper letters, 92 selfloop transitions, 14 changer transitions 0/108 dead transitions. [2024-06-21 21:09:41,449 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 124 places, 108 transitions, 936 flow [2024-06-21 21:09:41,449 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 21:09:41,449 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 21:09:41,449 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 96 transitions. [2024-06-21 21:09:41,450 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.34408602150537637 [2024-06-21 21:09:41,450 INFO L175 Difference]: Start difference. First operand has 116 places, 98 transitions, 702 flow. Second operand 9 states and 96 transitions. [2024-06-21 21:09:41,450 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 124 places, 108 transitions, 936 flow [2024-06-21 21:09:41,470 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 117 places, 108 transitions, 892 flow, removed 8 selfloop flow, removed 7 redundant places. [2024-06-21 21:09:41,472 INFO L231 Difference]: Finished difference. Result has 118 places, 98 transitions, 690 flow [2024-06-21 21:09:41,472 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=658, PETRI_DIFFERENCE_MINUEND_PLACES=109, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=98, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=84, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=690, PETRI_PLACES=118, PETRI_TRANSITIONS=98} [2024-06-21 21:09:41,472 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 88 predicate places. [2024-06-21 21:09:41,472 INFO L495 AbstractCegarLoop]: Abstraction has has 118 places, 98 transitions, 690 flow [2024-06-21 21:09:41,472 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 7.2727272727272725) internal successors, (80), 11 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:09:41,472 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:09:41,473 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:09:41,473 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2024-06-21 21:09:41,473 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 21:09:41,473 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:09:41,473 INFO L85 PathProgramCache]: Analyzing trace with hash 345732563, now seen corresponding path program 1 times [2024-06-21 21:09:41,473 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:09:41,473 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [13348481] [2024-06-21 21:09:41,474 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:09:41,474 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:09:41,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:09:42,178 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:09:42,178 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:09:42,178 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [13348481] [2024-06-21 21:09:42,178 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [13348481] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:09:42,179 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:09:42,179 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 21:09:42,179 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1636195532] [2024-06-21 21:09:42,179 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:09:42,179 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 21:09:42,179 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:09:42,179 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 21:09:42,180 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-21 21:09:42,249 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 21:09:42,250 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 118 places, 98 transitions, 690 flow. Second operand has 10 states, 10 states have (on average 7.4) internal successors, (74), 10 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:09:42,250 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:09:42,250 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 21:09:42,250 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:09:42,477 INFO L124 PetriNetUnfolderBase]: 312/555 cut-off events. [2024-06-21 21:09:42,477 INFO L125 PetriNetUnfolderBase]: For 17425/17425 co-relation queries the response was YES. [2024-06-21 21:09:42,478 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2862 conditions, 555 events. 312/555 cut-off events. For 17425/17425 co-relation queries the response was YES. Maximal size of possible extension queue 46. Compared 2239 event pairs, 36 based on Foata normal form. 2/555 useless extension candidates. Maximal degree in co-relation 2803. Up to 371 conditions per place. [2024-06-21 21:09:42,493 INFO L140 encePairwiseOnDemand]: 22/31 looper letters, 81 selfloop transitions, 34 changer transitions 0/117 dead transitions. [2024-06-21 21:09:42,502 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 126 places, 117 transitions, 1048 flow [2024-06-21 21:09:42,503 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 21:09:42,503 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 21:09:42,503 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 109 transitions. [2024-06-21 21:09:42,503 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3906810035842294 [2024-06-21 21:09:42,503 INFO L175 Difference]: Start difference. First operand has 118 places, 98 transitions, 690 flow. Second operand 9 states and 109 transitions. [2024-06-21 21:09:42,503 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 126 places, 117 transitions, 1048 flow [2024-06-21 21:09:42,523 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 118 places, 117 transitions, 1009 flow, removed 4 selfloop flow, removed 8 redundant places. [2024-06-21 21:09:42,525 INFO L231 Difference]: Finished difference. Result has 119 places, 99 transitions, 731 flow [2024-06-21 21:09:42,525 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=651, PETRI_DIFFERENCE_MINUEND_PLACES=110, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=98, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=65, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=731, PETRI_PLACES=119, PETRI_TRANSITIONS=99} [2024-06-21 21:09:42,525 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 89 predicate places. [2024-06-21 21:09:42,525 INFO L495 AbstractCegarLoop]: Abstraction has has 119 places, 99 transitions, 731 flow [2024-06-21 21:09:42,526 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 7.4) internal successors, (74), 10 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:09:42,526 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:09:42,526 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:09:42,526 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2024-06-21 21:09:42,526 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 21:09:42,526 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:09:42,526 INFO L85 PathProgramCache]: Analyzing trace with hash 347606513, now seen corresponding path program 2 times [2024-06-21 21:09:42,526 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:09:42,527 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1232107892] [2024-06-21 21:09:42,527 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:09:42,527 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:09:42,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:09:43,200 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:09:43,200 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:09:43,201 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1232107892] [2024-06-21 21:09:43,201 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1232107892] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:09:43,201 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:09:43,201 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 21:09:43,201 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [501178932] [2024-06-21 21:09:43,201 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:09:43,201 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 21:09:43,202 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:09:43,202 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 21:09:43,202 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-21 21:09:43,331 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 21:09:43,332 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 119 places, 99 transitions, 731 flow. Second operand has 10 states, 10 states have (on average 7.4) internal successors, (74), 10 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:09:43,332 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:09:43,332 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 21:09:43,332 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:09:43,566 INFO L124 PetriNetUnfolderBase]: 326/581 cut-off events. [2024-06-21 21:09:43,566 INFO L125 PetriNetUnfolderBase]: For 19851/19851 co-relation queries the response was YES. [2024-06-21 21:09:43,568 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3104 conditions, 581 events. 326/581 cut-off events. For 19851/19851 co-relation queries the response was YES. Maximal size of possible extension queue 50. Compared 2402 event pairs, 54 based on Foata normal form. 2/581 useless extension candidates. Maximal degree in co-relation 3045. Up to 452 conditions per place. [2024-06-21 21:09:43,569 INFO L140 encePairwiseOnDemand]: 22/31 looper letters, 82 selfloop transitions, 36 changer transitions 0/120 dead transitions. [2024-06-21 21:09:43,569 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 127 places, 120 transitions, 1121 flow [2024-06-21 21:09:43,570 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 21:09:43,570 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 21:09:43,573 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 112 transitions. [2024-06-21 21:09:43,574 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4014336917562724 [2024-06-21 21:09:43,574 INFO L175 Difference]: Start difference. First operand has 119 places, 99 transitions, 731 flow. Second operand 9 states and 112 transitions. [2024-06-21 21:09:43,574 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 127 places, 120 transitions, 1121 flow [2024-06-21 21:09:43,597 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 121 places, 120 transitions, 1041 flow, removed 9 selfloop flow, removed 6 redundant places. [2024-06-21 21:09:43,599 INFO L231 Difference]: Finished difference. Result has 122 places, 103 transitions, 763 flow [2024-06-21 21:09:43,599 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=664, PETRI_DIFFERENCE_MINUEND_PLACES=113, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=99, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=66, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=763, PETRI_PLACES=122, PETRI_TRANSITIONS=103} [2024-06-21 21:09:43,600 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 92 predicate places. [2024-06-21 21:09:43,600 INFO L495 AbstractCegarLoop]: Abstraction has has 122 places, 103 transitions, 763 flow [2024-06-21 21:09:43,600 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 7.4) internal successors, (74), 10 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:09:43,600 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:09:43,600 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:09:43,600 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2024-06-21 21:09:43,600 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 21:09:43,601 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:09:43,601 INFO L85 PathProgramCache]: Analyzing trace with hash 347610388, now seen corresponding path program 1 times [2024-06-21 21:09:43,601 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:09:43,601 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [31384337] [2024-06-21 21:09:43,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:09:43,601 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:09:43,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:09:44,283 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:09:44,283 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:09:44,283 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [31384337] [2024-06-21 21:09:44,283 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [31384337] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:09:44,283 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:09:44,284 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 21:09:44,284 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1172423927] [2024-06-21 21:09:44,284 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:09:44,284 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 21:09:44,284 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:09:44,285 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 21:09:44,285 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-21 21:09:44,377 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 21:09:44,377 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 122 places, 103 transitions, 763 flow. Second operand has 10 states, 10 states have (on average 7.4) internal successors, (74), 10 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:09:44,377 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:09:44,377 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 21:09:44,378 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:09:44,543 INFO L124 PetriNetUnfolderBase]: 329/586 cut-off events. [2024-06-21 21:09:44,543 INFO L125 PetriNetUnfolderBase]: For 20176/20176 co-relation queries the response was YES. [2024-06-21 21:09:44,545 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3125 conditions, 586 events. 329/586 cut-off events. For 20176/20176 co-relation queries the response was YES. Maximal size of possible extension queue 52. Compared 2449 event pairs, 44 based on Foata normal form. 1/585 useless extension candidates. Maximal degree in co-relation 3065. Up to 415 conditions per place. [2024-06-21 21:09:44,562 INFO L140 encePairwiseOnDemand]: 21/31 looper letters, 95 selfloop transitions, 37 changer transitions 0/134 dead transitions. [2024-06-21 21:09:44,563 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 130 places, 134 transitions, 1231 flow [2024-06-21 21:09:44,575 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 21:09:44,575 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 21:09:44,575 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 113 transitions. [2024-06-21 21:09:44,575 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4050179211469534 [2024-06-21 21:09:44,575 INFO L175 Difference]: Start difference. First operand has 122 places, 103 transitions, 763 flow. Second operand 9 states and 113 transitions. [2024-06-21 21:09:44,575 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 130 places, 134 transitions, 1231 flow [2024-06-21 21:09:44,598 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 126 places, 134 transitions, 1189 flow, removed 2 selfloop flow, removed 4 redundant places. [2024-06-21 21:09:44,600 INFO L231 Difference]: Finished difference. Result has 128 places, 115 transitions, 896 flow [2024-06-21 21:09:44,600 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=721, PETRI_DIFFERENCE_MINUEND_PLACES=118, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=103, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=69, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=896, PETRI_PLACES=128, PETRI_TRANSITIONS=115} [2024-06-21 21:09:44,600 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 98 predicate places. [2024-06-21 21:09:44,600 INFO L495 AbstractCegarLoop]: Abstraction has has 128 places, 115 transitions, 896 flow [2024-06-21 21:09:44,600 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 7.4) internal successors, (74), 10 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:09:44,601 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:09:44,601 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:09:44,601 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2024-06-21 21:09:44,601 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 21:09:44,601 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:09:44,601 INFO L85 PathProgramCache]: Analyzing trace with hash 347610233, now seen corresponding path program 3 times [2024-06-21 21:09:44,601 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:09:44,601 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [247919690] [2024-06-21 21:09:44,602 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:09:44,602 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:09:44,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:09:45,341 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:09:45,341 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:09:45,341 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [247919690] [2024-06-21 21:09:45,341 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [247919690] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:09:45,341 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:09:45,341 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 21:09:45,342 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [483568510] [2024-06-21 21:09:45,342 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:09:45,342 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 21:09:45,342 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:09:45,342 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 21:09:45,342 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-21 21:09:45,390 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 21:09:45,390 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 128 places, 115 transitions, 896 flow. Second operand has 10 states, 10 states have (on average 7.4) internal successors, (74), 10 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:09:45,390 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:09:45,390 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 21:09:45,390 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:09:45,544 INFO L124 PetriNetUnfolderBase]: 326/581 cut-off events. [2024-06-21 21:09:45,545 INFO L125 PetriNetUnfolderBase]: For 20475/20475 co-relation queries the response was YES. [2024-06-21 21:09:45,546 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3206 conditions, 581 events. 326/581 cut-off events. For 20475/20475 co-relation queries the response was YES. Maximal size of possible extension queue 52. Compared 2400 event pairs, 54 based on Foata normal form. 2/581 useless extension candidates. Maximal degree in co-relation 3144. Up to 469 conditions per place. [2024-06-21 21:09:45,548 INFO L140 encePairwiseOnDemand]: 22/31 looper letters, 93 selfloop transitions, 35 changer transitions 0/130 dead transitions. [2024-06-21 21:09:45,548 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 136 places, 130 transitions, 1192 flow [2024-06-21 21:09:45,549 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 21:09:45,549 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 21:09:45,549 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 109 transitions. [2024-06-21 21:09:45,549 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3906810035842294 [2024-06-21 21:09:45,549 INFO L175 Difference]: Start difference. First operand has 128 places, 115 transitions, 896 flow. Second operand 9 states and 109 transitions. [2024-06-21 21:09:45,549 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 136 places, 130 transitions, 1192 flow [2024-06-21 21:09:45,574 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 131 places, 130 transitions, 1153 flow, removed 8 selfloop flow, removed 5 redundant places. [2024-06-21 21:09:45,575 INFO L231 Difference]: Finished difference. Result has 132 places, 115 transitions, 931 flow [2024-06-21 21:09:45,575 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=857, PETRI_DIFFERENCE_MINUEND_PLACES=123, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=115, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=80, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=931, PETRI_PLACES=132, PETRI_TRANSITIONS=115} [2024-06-21 21:09:45,576 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 102 predicate places. [2024-06-21 21:09:45,576 INFO L495 AbstractCegarLoop]: Abstraction has has 132 places, 115 transitions, 931 flow [2024-06-21 21:09:45,576 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 7.4) internal successors, (74), 10 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:09:45,576 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:09:45,576 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:09:45,576 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2024-06-21 21:09:45,577 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 21:09:45,577 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:09:45,577 INFO L85 PathProgramCache]: Analyzing trace with hash -273308576, now seen corresponding path program 2 times [2024-06-21 21:09:45,577 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:09:45,577 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [95204453] [2024-06-21 21:09:45,577 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:09:45,577 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:09:45,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:09:46,137 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:09:46,137 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:09:46,137 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [95204453] [2024-06-21 21:09:46,138 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [95204453] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:09:46,138 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:09:46,138 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 21:09:46,138 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [109041377] [2024-06-21 21:09:46,138 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:09:46,138 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 21:09:46,138 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:09:46,139 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 21:09:46,139 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-21 21:09:46,212 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 21:09:46,212 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 132 places, 115 transitions, 931 flow. Second operand has 10 states, 10 states have (on average 7.4) internal successors, (74), 10 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:09:46,212 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:09:46,212 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 21:09:46,212 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:09:46,414 INFO L124 PetriNetUnfolderBase]: 329/586 cut-off events. [2024-06-21 21:09:46,414 INFO L125 PetriNetUnfolderBase]: For 20620/20620 co-relation queries the response was YES. [2024-06-21 21:09:46,415 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3263 conditions, 586 events. 329/586 cut-off events. For 20620/20620 co-relation queries the response was YES. Maximal size of possible extension queue 54. Compared 2436 event pairs, 45 based on Foata normal form. 1/585 useless extension candidates. Maximal degree in co-relation 3200. Up to 476 conditions per place. [2024-06-21 21:09:46,417 INFO L140 encePairwiseOnDemand]: 20/31 looper letters, 99 selfloop transitions, 32 changer transitions 0/133 dead transitions. [2024-06-21 21:09:46,417 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 140 places, 133 transitions, 1265 flow [2024-06-21 21:09:46,418 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 21:09:46,418 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 21:09:46,418 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 109 transitions. [2024-06-21 21:09:46,418 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3906810035842294 [2024-06-21 21:09:46,418 INFO L175 Difference]: Start difference. First operand has 132 places, 115 transitions, 931 flow. Second operand 9 states and 109 transitions. [2024-06-21 21:09:46,418 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 140 places, 133 transitions, 1265 flow [2024-06-21 21:09:46,445 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 132 places, 133 transitions, 1193 flow, removed 0 selfloop flow, removed 8 redundant places. [2024-06-21 21:09:46,446 INFO L231 Difference]: Finished difference. Result has 134 places, 119 transitions, 961 flow [2024-06-21 21:09:46,447 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=859, PETRI_DIFFERENCE_MINUEND_PLACES=124, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=115, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=84, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=961, PETRI_PLACES=134, PETRI_TRANSITIONS=119} [2024-06-21 21:09:46,447 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 104 predicate places. [2024-06-21 21:09:46,447 INFO L495 AbstractCegarLoop]: Abstraction has has 134 places, 119 transitions, 961 flow [2024-06-21 21:09:46,447 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 7.4) internal successors, (74), 10 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:09:46,447 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:09:46,447 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:09:46,448 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2024-06-21 21:09:46,448 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 21:09:46,448 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:09:46,448 INFO L85 PathProgramCache]: Analyzing trace with hash -273314156, now seen corresponding path program 3 times [2024-06-21 21:09:46,448 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:09:46,448 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [279489950] [2024-06-21 21:09:46,448 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:09:46,449 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:09:46,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:09:47,169 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:09:47,170 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:09:47,170 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [279489950] [2024-06-21 21:09:47,170 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [279489950] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:09:47,170 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:09:47,170 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 21:09:47,170 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1544532288] [2024-06-21 21:09:47,170 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:09:47,172 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 21:09:47,172 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:09:47,173 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 21:09:47,173 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-21 21:09:47,235 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 21:09:47,236 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 134 places, 119 transitions, 961 flow. Second operand has 10 states, 10 states have (on average 7.4) internal successors, (74), 10 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:09:47,236 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:09:47,236 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 21:09:47,236 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:09:47,500 INFO L124 PetriNetUnfolderBase]: 341/606 cut-off events. [2024-06-21 21:09:47,500 INFO L125 PetriNetUnfolderBase]: For 23368/23368 co-relation queries the response was YES. [2024-06-21 21:09:47,502 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3397 conditions, 606 events. 341/606 cut-off events. For 23368/23368 co-relation queries the response was YES. Maximal size of possible extension queue 56. Compared 2534 event pairs, 51 based on Foata normal form. 3/607 useless extension candidates. Maximal degree in co-relation 3332. Up to 400 conditions per place. [2024-06-21 21:09:47,503 INFO L140 encePairwiseOnDemand]: 19/31 looper letters, 84 selfloop transitions, 54 changer transitions 0/140 dead transitions. [2024-06-21 21:09:47,503 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 143 places, 140 transitions, 1320 flow [2024-06-21 21:09:47,504 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 21:09:47,504 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 21:09:47,504 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 124 transitions. [2024-06-21 21:09:47,504 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4 [2024-06-21 21:09:47,504 INFO L175 Difference]: Start difference. First operand has 134 places, 119 transitions, 961 flow. Second operand 10 states and 124 transitions. [2024-06-21 21:09:47,504 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 143 places, 140 transitions, 1320 flow [2024-06-21 21:09:47,544 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 137 places, 140 transitions, 1260 flow, removed 2 selfloop flow, removed 6 redundant places. [2024-06-21 21:09:47,546 INFO L231 Difference]: Finished difference. Result has 139 places, 125 transitions, 1082 flow [2024-06-21 21:09:47,547 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=901, PETRI_DIFFERENCE_MINUEND_PLACES=128, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=119, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=48, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=65, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1082, PETRI_PLACES=139, PETRI_TRANSITIONS=125} [2024-06-21 21:09:47,547 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 109 predicate places. [2024-06-21 21:09:47,547 INFO L495 AbstractCegarLoop]: Abstraction has has 139 places, 125 transitions, 1082 flow [2024-06-21 21:09:47,547 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 7.4) internal successors, (74), 10 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:09:47,547 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:09:47,547 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:09:47,548 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2024-06-21 21:09:47,548 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 21:09:47,548 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:09:47,548 INFO L85 PathProgramCache]: Analyzing trace with hash -273314311, now seen corresponding path program 4 times [2024-06-21 21:09:47,548 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:09:47,548 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1094166177] [2024-06-21 21:09:47,548 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:09:47,549 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:09:47,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:09:48,375 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:09:48,375 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:09:48,375 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1094166177] [2024-06-21 21:09:48,375 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1094166177] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:09:48,375 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:09:48,375 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 21:09:48,375 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [481864907] [2024-06-21 21:09:48,375 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:09:48,376 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 21:09:48,376 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:09:48,376 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 21:09:48,376 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-21 21:09:48,442 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 21:09:48,443 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 139 places, 125 transitions, 1082 flow. Second operand has 10 states, 10 states have (on average 7.4) internal successors, (74), 10 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:09:48,443 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:09:48,443 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 21:09:48,443 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:09:48,629 INFO L124 PetriNetUnfolderBase]: 345/614 cut-off events. [2024-06-21 21:09:48,629 INFO L125 PetriNetUnfolderBase]: For 23585/23585 co-relation queries the response was YES. [2024-06-21 21:09:48,631 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3552 conditions, 614 events. 345/614 cut-off events. For 23585/23585 co-relation queries the response was YES. Maximal size of possible extension queue 58. Compared 2580 event pairs, 56 based on Foata normal form. 2/614 useless extension candidates. Maximal degree in co-relation 3485. Up to 536 conditions per place. [2024-06-21 21:09:48,632 INFO L140 encePairwiseOnDemand]: 21/31 looper letters, 109 selfloop transitions, 27 changer transitions 0/138 dead transitions. [2024-06-21 21:09:48,632 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 147 places, 138 transitions, 1391 flow [2024-06-21 21:09:48,655 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 21:09:48,655 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 21:09:48,656 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 106 transitions. [2024-06-21 21:09:48,656 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37992831541218636 [2024-06-21 21:09:48,656 INFO L175 Difference]: Start difference. First operand has 139 places, 125 transitions, 1082 flow. Second operand 9 states and 106 transitions. [2024-06-21 21:09:48,656 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 147 places, 138 transitions, 1391 flow [2024-06-21 21:09:48,684 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 140 places, 138 transitions, 1277 flow, removed 9 selfloop flow, removed 7 redundant places. [2024-06-21 21:09:48,686 INFO L231 Difference]: Finished difference. Result has 141 places, 126 transitions, 1035 flow [2024-06-21 21:09:48,686 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=968, PETRI_DIFFERENCE_MINUEND_PLACES=132, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=125, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=98, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1035, PETRI_PLACES=141, PETRI_TRANSITIONS=126} [2024-06-21 21:09:48,686 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 111 predicate places. [2024-06-21 21:09:48,686 INFO L495 AbstractCegarLoop]: Abstraction has has 141 places, 126 transitions, 1035 flow [2024-06-21 21:09:48,686 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 7.4) internal successors, (74), 10 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:09:48,687 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:09:48,687 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:09:48,687 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2024-06-21 21:09:48,688 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 21:09:48,688 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:09:48,688 INFO L85 PathProgramCache]: Analyzing trace with hash -273462181, now seen corresponding path program 5 times [2024-06-21 21:09:48,690 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:09:48,691 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2094066942] [2024-06-21 21:09:48,691 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:09:48,691 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:09:48,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:09:49,408 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:09:49,409 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:09:49,409 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2094066942] [2024-06-21 21:09:49,409 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2094066942] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:09:49,409 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:09:49,409 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 21:09:49,409 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2127649400] [2024-06-21 21:09:49,409 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:09:49,409 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 21:09:49,409 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:09:49,409 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 21:09:49,410 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-21 21:09:49,501 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 21:09:49,502 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 141 places, 126 transitions, 1035 flow. Second operand has 10 states, 10 states have (on average 7.4) internal successors, (74), 10 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:09:49,502 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:09:49,502 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 21:09:49,502 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:09:49,688 INFO L124 PetriNetUnfolderBase]: 356/635 cut-off events. [2024-06-21 21:09:49,689 INFO L125 PetriNetUnfolderBase]: For 25349/25349 co-relation queries the response was YES. [2024-06-21 21:09:49,691 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3639 conditions, 635 events. 356/635 cut-off events. For 25349/25349 co-relation queries the response was YES. Maximal size of possible extension queue 61. Compared 2739 event pairs, 55 based on Foata normal form. 2/635 useless extension candidates. Maximal degree in co-relation 3571. Up to 528 conditions per place. [2024-06-21 21:09:49,693 INFO L140 encePairwiseOnDemand]: 21/31 looper letters, 108 selfloop transitions, 32 changer transitions 0/142 dead transitions. [2024-06-21 21:09:49,693 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 149 places, 142 transitions, 1453 flow [2024-06-21 21:09:49,694 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 21:09:49,694 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 21:09:49,694 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 109 transitions. [2024-06-21 21:09:49,695 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3906810035842294 [2024-06-21 21:09:49,695 INFO L175 Difference]: Start difference. First operand has 141 places, 126 transitions, 1035 flow. Second operand 9 states and 109 transitions. [2024-06-21 21:09:49,695 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 149 places, 142 transitions, 1453 flow [2024-06-21 21:09:49,729 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 142 places, 142 transitions, 1397 flow, removed 2 selfloop flow, removed 7 redundant places. [2024-06-21 21:09:49,731 INFO L231 Difference]: Finished difference. Result has 143 places, 128 transitions, 1067 flow [2024-06-21 21:09:49,731 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=979, PETRI_DIFFERENCE_MINUEND_PLACES=134, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=126, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=95, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1067, PETRI_PLACES=143, PETRI_TRANSITIONS=128} [2024-06-21 21:09:49,733 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 113 predicate places. [2024-06-21 21:09:49,735 INFO L495 AbstractCegarLoop]: Abstraction has has 143 places, 128 transitions, 1067 flow [2024-06-21 21:09:49,735 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 7.4) internal successors, (74), 10 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:09:49,735 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:09:49,735 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:09:49,735 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2024-06-21 21:09:49,735 INFO L420 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 21:09:49,736 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:09:49,736 INFO L85 PathProgramCache]: Analyzing trace with hash -273458461, now seen corresponding path program 6 times [2024-06-21 21:09:49,736 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:09:49,736 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [265822618] [2024-06-21 21:09:49,736 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:09:49,736 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:09:49,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:09:50,504 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:09:50,504 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:09:50,504 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [265822618] [2024-06-21 21:09:50,504 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [265822618] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:09:50,504 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:09:50,504 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 21:09:50,504 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [130870336] [2024-06-21 21:09:50,504 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:09:50,504 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 21:09:50,505 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:09:50,505 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 21:09:50,505 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-21 21:09:50,602 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 21:09:50,602 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 143 places, 128 transitions, 1067 flow. Second operand has 10 states, 10 states have (on average 7.4) internal successors, (74), 10 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:09:50,602 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:09:50,602 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 21:09:50,602 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:09:50,828 INFO L124 PetriNetUnfolderBase]: 353/630 cut-off events. [2024-06-21 21:09:50,828 INFO L125 PetriNetUnfolderBase]: For 24681/24681 co-relation queries the response was YES. [2024-06-21 21:09:50,830 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3579 conditions, 630 events. 353/630 cut-off events. For 24681/24681 co-relation queries the response was YES. Maximal size of possible extension queue 61. Compared 2701 event pairs, 56 based on Foata normal form. 2/630 useless extension candidates. Maximal degree in co-relation 3510. Up to 546 conditions per place. [2024-06-21 21:09:50,832 INFO L140 encePairwiseOnDemand]: 21/31 looper letters, 108 selfloop transitions, 30 changer transitions 0/140 dead transitions. [2024-06-21 21:09:50,832 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 151 places, 140 transitions, 1373 flow [2024-06-21 21:09:50,832 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 21:09:50,832 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 21:09:50,833 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 107 transitions. [2024-06-21 21:09:50,833 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3835125448028674 [2024-06-21 21:09:50,833 INFO L175 Difference]: Start difference. First operand has 143 places, 128 transitions, 1067 flow. Second operand 9 states and 107 transitions. [2024-06-21 21:09:50,833 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 151 places, 140 transitions, 1373 flow [2024-06-21 21:09:50,869 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 146 places, 140 transitions, 1312 flow, removed 5 selfloop flow, removed 5 redundant places. [2024-06-21 21:09:50,870 INFO L231 Difference]: Finished difference. Result has 147 places, 128 transitions, 1070 flow [2024-06-21 21:09:50,871 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1006, PETRI_DIFFERENCE_MINUEND_PLACES=138, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=128, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=98, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1070, PETRI_PLACES=147, PETRI_TRANSITIONS=128} [2024-06-21 21:09:50,871 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 117 predicate places. [2024-06-21 21:09:50,871 INFO L495 AbstractCegarLoop]: Abstraction has has 147 places, 128 transitions, 1070 flow [2024-06-21 21:09:50,871 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 7.4) internal successors, (74), 10 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:09:50,871 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:09:50,871 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:09:50,871 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2024-06-21 21:09:50,871 INFO L420 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 21:09:50,871 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:09:50,872 INFO L85 PathProgramCache]: Analyzing trace with hash -273458306, now seen corresponding path program 4 times [2024-06-21 21:09:50,872 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:09:50,872 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [282039379] [2024-06-21 21:09:50,872 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:09:50,872 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:09:50,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:09:51,544 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:09:51,544 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:09:51,544 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [282039379] [2024-06-21 21:09:51,544 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [282039379] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:09:51,544 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:09:51,544 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 21:09:51,544 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1247393045] [2024-06-21 21:09:51,544 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:09:51,544 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 21:09:51,545 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:09:51,545 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 21:09:51,545 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-21 21:09:51,653 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 21:09:51,653 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 147 places, 128 transitions, 1070 flow. Second operand has 10 states, 10 states have (on average 7.4) internal successors, (74), 10 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:09:51,653 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:09:51,653 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 21:09:51,653 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:09:51,823 INFO L124 PetriNetUnfolderBase]: 356/635 cut-off events. [2024-06-21 21:09:51,823 INFO L125 PetriNetUnfolderBase]: For 24725/24725 co-relation queries the response was YES. [2024-06-21 21:09:51,825 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3642 conditions, 635 events. 356/635 cut-off events. For 24725/24725 co-relation queries the response was YES. Maximal size of possible extension queue 62. Compared 2749 event pairs, 49 based on Foata normal form. 1/634 useless extension candidates. Maximal degree in co-relation 3571. Up to 510 conditions per place. [2024-06-21 21:09:51,826 INFO L140 encePairwiseOnDemand]: 20/31 looper letters, 103 selfloop transitions, 39 changer transitions 0/144 dead transitions. [2024-06-21 21:09:51,826 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 155 places, 144 transitions, 1419 flow [2024-06-21 21:09:51,827 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 21:09:51,827 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 21:09:51,827 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 111 transitions. [2024-06-21 21:09:51,827 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3978494623655914 [2024-06-21 21:09:51,827 INFO L175 Difference]: Start difference. First operand has 147 places, 128 transitions, 1070 flow. Second operand 9 states and 111 transitions. [2024-06-21 21:09:51,827 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 155 places, 144 transitions, 1419 flow [2024-06-21 21:09:51,870 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 145 places, 144 transitions, 1333 flow, removed 3 selfloop flow, removed 10 redundant places. [2024-06-21 21:09:51,872 INFO L231 Difference]: Finished difference. Result has 146 places, 130 transitions, 1087 flow [2024-06-21 21:09:51,872 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=984, PETRI_DIFFERENCE_MINUEND_PLACES=137, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=128, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=89, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1087, PETRI_PLACES=146, PETRI_TRANSITIONS=130} [2024-06-21 21:09:51,872 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 116 predicate places. [2024-06-21 21:09:51,872 INFO L495 AbstractCegarLoop]: Abstraction has has 146 places, 130 transitions, 1087 flow [2024-06-21 21:09:51,873 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 7.4) internal successors, (74), 10 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:09:51,873 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:09:51,873 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:09:51,873 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2024-06-21 21:09:51,873 INFO L420 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 21:09:51,873 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:09:51,873 INFO L85 PathProgramCache]: Analyzing trace with hash -286642703, now seen corresponding path program 7 times [2024-06-21 21:09:51,873 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:09:51,873 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1233550362] [2024-06-21 21:09:51,874 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:09:51,874 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:09:51,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:09:52,613 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:09:52,614 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:09:52,614 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1233550362] [2024-06-21 21:09:52,614 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1233550362] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:09:52,614 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:09:52,614 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 21:09:52,614 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [168135340] [2024-06-21 21:09:52,614 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:09:52,614 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 21:09:52,614 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:09:52,614 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 21:09:52,615 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-21 21:09:52,684 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 21:09:52,684 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 146 places, 130 transitions, 1087 flow. Second operand has 10 states, 10 states have (on average 7.4) internal successors, (74), 10 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:09:52,684 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:09:52,684 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 21:09:52,684 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:09:52,940 INFO L124 PetriNetUnfolderBase]: 360/643 cut-off events. [2024-06-21 21:09:52,940 INFO L125 PetriNetUnfolderBase]: For 26912/26912 co-relation queries the response was YES. [2024-06-21 21:09:52,942 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3715 conditions, 643 events. 360/643 cut-off events. For 26912/26912 co-relation queries the response was YES. Maximal size of possible extension queue 63. Compared 2777 event pairs, 37 based on Foata normal form. 2/643 useless extension candidates. Maximal degree in co-relation 3644. Up to 506 conditions per place. [2024-06-21 21:09:52,943 INFO L140 encePairwiseOnDemand]: 21/31 looper letters, 111 selfloop transitions, 38 changer transitions 0/151 dead transitions. [2024-06-21 21:09:52,943 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 154 places, 151 transitions, 1542 flow [2024-06-21 21:09:52,944 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 21:09:52,944 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 21:09:52,944 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 116 transitions. [2024-06-21 21:09:52,944 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4157706093189964 [2024-06-21 21:09:52,944 INFO L175 Difference]: Start difference. First operand has 146 places, 130 transitions, 1087 flow. Second operand 9 states and 116 transitions. [2024-06-21 21:09:52,944 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 154 places, 151 transitions, 1542 flow [2024-06-21 21:09:52,991 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 148 places, 151 transitions, 1469 flow, removed 4 selfloop flow, removed 6 redundant places. [2024-06-21 21:09:52,993 INFO L231 Difference]: Finished difference. Result has 149 places, 131 transitions, 1105 flow [2024-06-21 21:09:52,993 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1014, PETRI_DIFFERENCE_MINUEND_PLACES=140, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=130, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=93, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1105, PETRI_PLACES=149, PETRI_TRANSITIONS=131} [2024-06-21 21:09:52,993 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 119 predicate places. [2024-06-21 21:09:52,993 INFO L495 AbstractCegarLoop]: Abstraction has has 149 places, 131 transitions, 1105 flow [2024-06-21 21:09:52,993 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 7.4) internal successors, (74), 10 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:09:52,994 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:09:52,994 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:09:52,994 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2024-06-21 21:09:52,994 INFO L420 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 21:09:52,994 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:09:52,994 INFO L85 PathProgramCache]: Analyzing trace with hash -286638983, now seen corresponding path program 8 times [2024-06-21 21:09:52,994 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:09:52,994 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1342170534] [2024-06-21 21:09:52,994 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:09:52,994 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:09:53,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:09:53,797 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:09:53,798 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:09:53,798 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1342170534] [2024-06-21 21:09:53,798 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1342170534] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:09:53,798 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:09:53,798 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 21:09:53,798 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1854963831] [2024-06-21 21:09:53,798 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:09:53,798 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 21:09:53,798 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:09:53,798 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 21:09:53,798 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-21 21:09:53,871 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 21:09:53,871 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 149 places, 131 transitions, 1105 flow. Second operand has 10 states, 10 states have (on average 7.4) internal successors, (74), 10 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:09:53,871 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:09:53,871 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 21:09:53,871 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:09:54,162 INFO L124 PetriNetUnfolderBase]: 364/651 cut-off events. [2024-06-21 21:09:54,162 INFO L125 PetriNetUnfolderBase]: For 28160/28160 co-relation queries the response was YES. [2024-06-21 21:09:54,164 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3779 conditions, 651 events. 364/651 cut-off events. For 28160/28160 co-relation queries the response was YES. Maximal size of possible extension queue 64. Compared 2822 event pairs, 56 based on Foata normal form. 2/651 useless extension candidates. Maximal degree in co-relation 3707. Up to 553 conditions per place. [2024-06-21 21:09:54,166 INFO L140 encePairwiseOnDemand]: 21/31 looper letters, 112 selfloop transitions, 37 changer transitions 0/151 dead transitions. [2024-06-21 21:09:54,166 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 158 places, 151 transitions, 1468 flow [2024-06-21 21:09:54,166 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 21:09:54,166 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 21:09:54,167 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 123 transitions. [2024-06-21 21:09:54,167 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3967741935483871 [2024-06-21 21:09:54,167 INFO L175 Difference]: Start difference. First operand has 149 places, 131 transitions, 1105 flow. Second operand 10 states and 123 transitions. [2024-06-21 21:09:54,167 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 158 places, 151 transitions, 1468 flow [2024-06-21 21:09:54,237 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 149 places, 151 transitions, 1326 flow, removed 8 selfloop flow, removed 9 redundant places. [2024-06-21 21:09:54,239 INFO L231 Difference]: Finished difference. Result has 150 places, 132 transitions, 1056 flow [2024-06-21 21:09:54,239 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=969, PETRI_DIFFERENCE_MINUEND_PLACES=140, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=131, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=94, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1056, PETRI_PLACES=150, PETRI_TRANSITIONS=132} [2024-06-21 21:09:54,239 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 120 predicate places. [2024-06-21 21:09:54,239 INFO L495 AbstractCegarLoop]: Abstraction has has 150 places, 132 transitions, 1056 flow [2024-06-21 21:09:54,239 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 7.4) internal successors, (74), 10 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:09:54,240 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:09:54,240 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:09:54,240 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2024-06-21 21:09:54,240 INFO L420 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 21:09:54,240 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:09:54,241 INFO L85 PathProgramCache]: Analyzing trace with hash -131825162, now seen corresponding path program 5 times [2024-06-21 21:09:54,241 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:09:54,241 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [956277779] [2024-06-21 21:09:54,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:09:54,241 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:09:54,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:09:54,767 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:09:54,767 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:09:54,767 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [956277779] [2024-06-21 21:09:54,767 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [956277779] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:09:54,767 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:09:54,767 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 21:09:54,768 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1246808986] [2024-06-21 21:09:54,768 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:09:54,768 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 21:09:54,768 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:09:54,768 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 21:09:54,769 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-21 21:09:54,847 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 21:09:54,847 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 150 places, 132 transitions, 1056 flow. Second operand has 10 states, 10 states have (on average 7.4) internal successors, (74), 10 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:09:54,848 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:09:54,848 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 21:09:54,848 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:09:55,026 INFO L124 PetriNetUnfolderBase]: 370/661 cut-off events. [2024-06-21 21:09:55,026 INFO L125 PetriNetUnfolderBase]: For 28047/28047 co-relation queries the response was YES. [2024-06-21 21:09:55,028 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3707 conditions, 661 events. 370/661 cut-off events. For 28047/28047 co-relation queries the response was YES. Maximal size of possible extension queue 66. Compared 2891 event pairs, 53 based on Foata normal form. 1/660 useless extension candidates. Maximal degree in co-relation 3636. Up to 507 conditions per place. [2024-06-21 21:09:55,030 INFO L140 encePairwiseOnDemand]: 20/31 looper letters, 109 selfloop transitions, 47 changer transitions 0/158 dead transitions. [2024-06-21 21:09:55,030 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 158 places, 158 transitions, 1578 flow [2024-06-21 21:09:55,030 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 21:09:55,030 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 21:09:55,031 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 119 transitions. [2024-06-21 21:09:55,031 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4265232974910394 [2024-06-21 21:09:55,031 INFO L175 Difference]: Start difference. First operand has 150 places, 132 transitions, 1056 flow. Second operand 9 states and 119 transitions. [2024-06-21 21:09:55,031 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 158 places, 158 transitions, 1578 flow [2024-06-21 21:09:55,081 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 150 places, 158 transitions, 1499 flow, removed 2 selfloop flow, removed 8 redundant places. [2024-06-21 21:09:55,083 INFO L231 Difference]: Finished difference. Result has 153 places, 140 transitions, 1172 flow [2024-06-21 21:09:55,083 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=980, PETRI_DIFFERENCE_MINUEND_PLACES=142, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=132, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=89, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1172, PETRI_PLACES=153, PETRI_TRANSITIONS=140} [2024-06-21 21:09:55,084 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 123 predicate places. [2024-06-21 21:09:55,084 INFO L495 AbstractCegarLoop]: Abstraction has has 153 places, 140 transitions, 1172 flow [2024-06-21 21:09:55,084 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 7.4) internal successors, (74), 10 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:09:55,084 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:09:55,084 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:09:55,084 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2024-06-21 21:09:55,084 INFO L420 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 21:09:55,085 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:09:55,085 INFO L85 PathProgramCache]: Analyzing trace with hash -994249602, now seen corresponding path program 6 times [2024-06-21 21:09:55,085 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:09:55,085 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1612692246] [2024-06-21 21:09:55,085 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:09:55,085 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:09:55,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:09:55,784 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:09:55,784 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:09:55,784 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1612692246] [2024-06-21 21:09:55,784 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1612692246] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:09:55,784 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:09:55,784 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 21:09:55,784 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1259798181] [2024-06-21 21:09:55,784 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:09:55,784 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 21:09:55,784 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:09:55,785 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 21:09:55,785 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-21 21:09:55,863 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 21:09:55,863 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 153 places, 140 transitions, 1172 flow. Second operand has 10 states, 10 states have (on average 7.4) internal successors, (74), 10 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:09:55,863 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:09:55,863 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 21:09:55,863 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:09:56,090 INFO L124 PetriNetUnfolderBase]: 373/666 cut-off events. [2024-06-21 21:09:56,090 INFO L125 PetriNetUnfolderBase]: For 29327/29327 co-relation queries the response was YES. [2024-06-21 21:09:56,092 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3850 conditions, 666 events. 373/666 cut-off events. For 29327/29327 co-relation queries the response was YES. Maximal size of possible extension queue 67. Compared 2918 event pairs, 53 based on Foata normal form. 1/665 useless extension candidates. Maximal degree in co-relation 3776. Up to 556 conditions per place. [2024-06-21 21:09:56,094 INFO L140 encePairwiseOnDemand]: 20/31 looper letters, 115 selfloop transitions, 40 changer transitions 0/157 dead transitions. [2024-06-21 21:09:56,094 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 161 places, 157 transitions, 1551 flow [2024-06-21 21:09:56,094 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 21:09:56,095 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 21:09:56,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 112 transitions. [2024-06-21 21:09:56,095 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4014336917562724 [2024-06-21 21:09:56,095 INFO L175 Difference]: Start difference. First operand has 153 places, 140 transitions, 1172 flow. Second operand 9 states and 112 transitions. [2024-06-21 21:09:56,095 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 161 places, 157 transitions, 1551 flow [2024-06-21 21:09:56,145 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 157 places, 157 transitions, 1475 flow, removed 6 selfloop flow, removed 4 redundant places. [2024-06-21 21:09:56,147 INFO L231 Difference]: Finished difference. Result has 158 places, 143 transitions, 1216 flow [2024-06-21 21:09:56,147 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1101, PETRI_DIFFERENCE_MINUEND_PLACES=149, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=140, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=101, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1216, PETRI_PLACES=158, PETRI_TRANSITIONS=143} [2024-06-21 21:09:56,147 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 128 predicate places. [2024-06-21 21:09:56,147 INFO L495 AbstractCegarLoop]: Abstraction has has 158 places, 143 transitions, 1216 flow [2024-06-21 21:09:56,148 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 7.4) internal successors, (74), 10 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:09:56,148 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:09:56,148 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:09:56,148 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2024-06-21 21:09:56,148 INFO L420 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 21:09:56,148 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:09:56,149 INFO L85 PathProgramCache]: Analyzing trace with hash -126111242, now seen corresponding path program 7 times [2024-06-21 21:09:56,149 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:09:56,149 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1194233392] [2024-06-21 21:09:56,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:09:56,149 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:09:56,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:09:56,798 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:09:56,799 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:09:56,799 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1194233392] [2024-06-21 21:09:56,799 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1194233392] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:09:56,799 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:09:56,799 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 21:09:56,799 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [385877389] [2024-06-21 21:09:56,799 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:09:56,799 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 21:09:56,800 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:09:56,800 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 21:09:56,800 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-21 21:09:56,919 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 21:09:56,919 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 158 places, 143 transitions, 1216 flow. Second operand has 10 states, 10 states have (on average 7.4) internal successors, (74), 10 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:09:56,919 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:09:56,919 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 21:09:56,919 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:09:57,138 INFO L124 PetriNetUnfolderBase]: 376/671 cut-off events. [2024-06-21 21:09:57,139 INFO L125 PetriNetUnfolderBase]: For 30599/30599 co-relation queries the response was YES. [2024-06-21 21:09:57,141 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3909 conditions, 671 events. 376/671 cut-off events. For 30599/30599 co-relation queries the response was YES. Maximal size of possible extension queue 68. Compared 2958 event pairs, 51 based on Foata normal form. 1/670 useless extension candidates. Maximal degree in co-relation 3834. Up to 561 conditions per place. [2024-06-21 21:09:57,142 INFO L140 encePairwiseOnDemand]: 21/31 looper letters, 118 selfloop transitions, 39 changer transitions 0/159 dead transitions. [2024-06-21 21:09:57,142 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 166 places, 159 transitions, 1607 flow [2024-06-21 21:09:57,143 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 21:09:57,143 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 21:09:57,143 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 108 transitions. [2024-06-21 21:09:57,143 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3870967741935484 [2024-06-21 21:09:57,143 INFO L175 Difference]: Start difference. First operand has 158 places, 143 transitions, 1216 flow. Second operand 9 states and 108 transitions. [2024-06-21 21:09:57,143 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 166 places, 159 transitions, 1607 flow [2024-06-21 21:09:57,205 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 160 places, 159 transitions, 1513 flow, removed 6 selfloop flow, removed 6 redundant places. [2024-06-21 21:09:57,207 INFO L231 Difference]: Finished difference. Result has 161 places, 148 transitions, 1258 flow [2024-06-21 21:09:57,207 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1128, PETRI_DIFFERENCE_MINUEND_PLACES=152, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=143, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=107, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1258, PETRI_PLACES=161, PETRI_TRANSITIONS=148} [2024-06-21 21:09:57,207 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 131 predicate places. [2024-06-21 21:09:57,207 INFO L495 AbstractCegarLoop]: Abstraction has has 161 places, 148 transitions, 1258 flow [2024-06-21 21:09:57,207 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 7.4) internal successors, (74), 10 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:09:57,207 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:09:57,208 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:09:57,208 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2024-06-21 21:09:57,208 INFO L420 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 21:09:57,208 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:09:57,208 INFO L85 PathProgramCache]: Analyzing trace with hash -988887222, now seen corresponding path program 8 times [2024-06-21 21:09:57,208 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:09:57,208 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1058221205] [2024-06-21 21:09:57,208 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:09:57,209 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:09:57,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:09:57,904 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:09:57,905 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:09:57,905 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1058221205] [2024-06-21 21:09:57,905 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1058221205] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:09:57,905 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:09:57,905 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 21:09:57,905 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [255732975] [2024-06-21 21:09:57,905 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:09:57,905 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 21:09:57,906 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:09:57,906 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 21:09:57,906 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-21 21:09:57,964 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 21:09:57,964 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 161 places, 148 transitions, 1258 flow. Second operand has 10 states, 10 states have (on average 7.4) internal successors, (74), 10 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:09:57,964 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:09:57,964 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 21:09:57,964 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:09:58,143 INFO L124 PetriNetUnfolderBase]: 379/676 cut-off events. [2024-06-21 21:09:58,143 INFO L125 PetriNetUnfolderBase]: For 31814/31814 co-relation queries the response was YES. [2024-06-21 21:09:58,146 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3962 conditions, 676 events. 379/676 cut-off events. For 31814/31814 co-relation queries the response was YES. Maximal size of possible extension queue 70. Compared 2965 event pairs, 55 based on Foata normal form. 1/675 useless extension candidates. Maximal degree in co-relation 3886. Up to 566 conditions per place. [2024-06-21 21:09:58,147 INFO L140 encePairwiseOnDemand]: 21/31 looper letters, 121 selfloop transitions, 38 changer transitions 0/161 dead transitions. [2024-06-21 21:09:58,147 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 169 places, 161 transitions, 1632 flow [2024-06-21 21:09:58,148 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 21:09:58,148 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 21:09:58,148 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 109 transitions. [2024-06-21 21:09:58,148 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3906810035842294 [2024-06-21 21:09:58,148 INFO L175 Difference]: Start difference. First operand has 161 places, 148 transitions, 1258 flow. Second operand 9 states and 109 transitions. [2024-06-21 21:09:58,149 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 169 places, 161 transitions, 1632 flow [2024-06-21 21:09:58,237 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 165 places, 161 transitions, 1574 flow, removed 8 selfloop flow, removed 4 redundant places. [2024-06-21 21:09:58,239 INFO L231 Difference]: Finished difference. Result has 166 places, 150 transitions, 1313 flow [2024-06-21 21:09:58,239 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1200, PETRI_DIFFERENCE_MINUEND_PLACES=157, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=148, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=110, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1313, PETRI_PLACES=166, PETRI_TRANSITIONS=150} [2024-06-21 21:09:58,239 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 136 predicate places. [2024-06-21 21:09:58,239 INFO L495 AbstractCegarLoop]: Abstraction has has 166 places, 150 transitions, 1313 flow [2024-06-21 21:09:58,239 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 7.4) internal successors, (74), 10 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:09:58,240 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:09:58,240 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:09:58,240 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2024-06-21 21:09:58,240 INFO L420 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 21:09:58,240 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:09:58,240 INFO L85 PathProgramCache]: Analyzing trace with hash -286494678, now seen corresponding path program 9 times [2024-06-21 21:09:58,241 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:09:58,241 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [88022831] [2024-06-21 21:09:58,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:09:58,241 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:09:58,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:09:59,001 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:09:59,001 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:09:59,002 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [88022831] [2024-06-21 21:09:59,002 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [88022831] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:09:59,002 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:09:59,002 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 21:09:59,002 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [352499343] [2024-06-21 21:09:59,002 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:09:59,003 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 21:09:59,003 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:09:59,003 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 21:09:59,003 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-21 21:09:59,064 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 21:09:59,065 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 166 places, 150 transitions, 1313 flow. Second operand has 10 states, 10 states have (on average 7.4) internal successors, (74), 10 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:09:59,065 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:09:59,065 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 21:09:59,065 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:09:59,357 INFO L124 PetriNetUnfolderBase]: 388/691 cut-off events. [2024-06-21 21:09:59,357 INFO L125 PetriNetUnfolderBase]: For 35924/35924 co-relation queries the response was YES. [2024-06-21 21:09:59,360 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4081 conditions, 691 events. 388/691 cut-off events. For 35924/35924 co-relation queries the response was YES. Maximal size of possible extension queue 72. Compared 3063 event pairs, 47 based on Foata normal form. 3/692 useless extension candidates. Maximal degree in co-relation 4004. Up to 485 conditions per place. [2024-06-21 21:09:59,362 INFO L140 encePairwiseOnDemand]: 19/31 looper letters, 108 selfloop transitions, 63 changer transitions 0/173 dead transitions. [2024-06-21 21:09:59,362 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 175 places, 173 transitions, 1753 flow [2024-06-21 21:09:59,362 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 21:09:59,362 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 21:09:59,363 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 129 transitions. [2024-06-21 21:09:59,363 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4161290322580645 [2024-06-21 21:09:59,363 INFO L175 Difference]: Start difference. First operand has 166 places, 150 transitions, 1313 flow. Second operand 10 states and 129 transitions. [2024-06-21 21:09:59,363 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 175 places, 173 transitions, 1753 flow [2024-06-21 21:09:59,422 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 170 places, 173 transitions, 1677 flow, removed 10 selfloop flow, removed 5 redundant places. [2024-06-21 21:09:59,424 INFO L231 Difference]: Finished difference. Result has 171 places, 154 transitions, 1432 flow [2024-06-21 21:09:59,424 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1237, PETRI_DIFFERENCE_MINUEND_PLACES=161, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=150, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=59, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=87, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1432, PETRI_PLACES=171, PETRI_TRANSITIONS=154} [2024-06-21 21:09:59,424 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 141 predicate places. [2024-06-21 21:09:59,424 INFO L495 AbstractCegarLoop]: Abstraction has has 171 places, 154 transitions, 1432 flow [2024-06-21 21:09:59,424 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 7.4) internal successors, (74), 10 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:09:59,424 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:09:59,425 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:09:59,425 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2024-06-21 21:09:59,425 INFO L420 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 21:09:59,425 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:09:59,425 INFO L85 PathProgramCache]: Analyzing trace with hash -281132298, now seen corresponding path program 10 times [2024-06-21 21:09:59,425 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:09:59,425 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [768701764] [2024-06-21 21:09:59,426 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:09:59,426 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:09:59,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:10:00,146 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:10:00,146 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:10:00,146 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [768701764] [2024-06-21 21:10:00,146 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [768701764] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:10:00,146 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:10:00,147 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 21:10:00,147 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1966762096] [2024-06-21 21:10:00,147 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:10:00,147 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 21:10:00,147 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:10:00,147 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 21:10:00,148 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-21 21:10:00,241 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 21:10:00,242 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 171 places, 154 transitions, 1432 flow. Second operand has 10 states, 10 states have (on average 7.4) internal successors, (74), 10 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:10:00,242 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:10:00,242 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 21:10:00,242 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:10:00,555 INFO L124 PetriNetUnfolderBase]: 407/722 cut-off events. [2024-06-21 21:10:00,555 INFO L125 PetriNetUnfolderBase]: For 40283/40283 co-relation queries the response was YES. [2024-06-21 21:10:00,558 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4475 conditions, 722 events. 407/722 cut-off events. For 40283/40283 co-relation queries the response was YES. Maximal size of possible extension queue 73. Compared 3223 event pairs, 49 based on Foata normal form. 3/723 useless extension candidates. Maximal degree in co-relation 4397. Up to 502 conditions per place. [2024-06-21 21:10:00,559 INFO L140 encePairwiseOnDemand]: 20/31 looper letters, 117 selfloop transitions, 60 changer transitions 0/179 dead transitions. [2024-06-21 21:10:00,559 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 180 places, 179 transitions, 2016 flow [2024-06-21 21:10:00,560 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 21:10:00,560 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 21:10:00,560 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 132 transitions. [2024-06-21 21:10:00,560 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4258064516129032 [2024-06-21 21:10:00,561 INFO L175 Difference]: Start difference. First operand has 171 places, 154 transitions, 1432 flow. Second operand 10 states and 132 transitions. [2024-06-21 21:10:00,561 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 180 places, 179 transitions, 2016 flow [2024-06-21 21:10:00,630 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 171 places, 179 transitions, 1847 flow, removed 23 selfloop flow, removed 9 redundant places. [2024-06-21 21:10:00,632 INFO L231 Difference]: Finished difference. Result has 172 places, 160 transitions, 1484 flow [2024-06-21 21:10:00,632 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1269, PETRI_DIFFERENCE_MINUEND_PLACES=162, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=154, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=56, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=96, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1484, PETRI_PLACES=172, PETRI_TRANSITIONS=160} [2024-06-21 21:10:00,633 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 142 predicate places. [2024-06-21 21:10:00,633 INFO L495 AbstractCegarLoop]: Abstraction has has 172 places, 160 transitions, 1484 flow [2024-06-21 21:10:00,633 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 7.4) internal successors, (74), 10 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:10:00,633 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:10:00,634 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:10:00,634 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2024-06-21 21:10:00,634 INFO L420 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 21:10:00,634 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:10:00,634 INFO L85 PathProgramCache]: Analyzing trace with hash -988892957, now seen corresponding path program 9 times [2024-06-21 21:10:00,634 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:10:00,634 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1138651242] [2024-06-21 21:10:00,634 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:10:00,635 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:10:00,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:10:01,361 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:10:01,361 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:10:01,361 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1138651242] [2024-06-21 21:10:01,361 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1138651242] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:10:01,361 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:10:01,362 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 21:10:01,362 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [679814162] [2024-06-21 21:10:01,362 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:10:01,362 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 21:10:01,362 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:10:01,362 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 21:10:01,362 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-21 21:10:01,479 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 21:10:01,480 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 172 places, 160 transitions, 1484 flow. Second operand has 10 states, 10 states have (on average 7.4) internal successors, (74), 10 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:10:01,480 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:10:01,480 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 21:10:01,480 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:10:01,704 INFO L124 PetriNetUnfolderBase]: 411/730 cut-off events. [2024-06-21 21:10:01,704 INFO L125 PetriNetUnfolderBase]: For 38928/38928 co-relation queries the response was YES. [2024-06-21 21:10:01,707 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4495 conditions, 730 events. 411/730 cut-off events. For 38928/38928 co-relation queries the response was YES. Maximal size of possible extension queue 74. Compared 3274 event pairs, 61 based on Foata normal form. 2/730 useless extension candidates. Maximal degree in co-relation 4417. Up to 652 conditions per place. [2024-06-21 21:10:01,709 INFO L140 encePairwiseOnDemand]: 22/31 looper letters, 144 selfloop transitions, 27 changer transitions 0/173 dead transitions. [2024-06-21 21:10:01,709 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 180 places, 173 transitions, 1865 flow [2024-06-21 21:10:01,709 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 21:10:01,709 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 21:10:01,710 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 105 transitions. [2024-06-21 21:10:01,710 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3763440860215054 [2024-06-21 21:10:01,710 INFO L175 Difference]: Start difference. First operand has 172 places, 160 transitions, 1484 flow. Second operand 9 states and 105 transitions. [2024-06-21 21:10:01,710 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 180 places, 173 transitions, 1865 flow [2024-06-21 21:10:01,771 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 174 places, 173 transitions, 1757 flow, removed 22 selfloop flow, removed 6 redundant places. [2024-06-21 21:10:01,773 INFO L231 Difference]: Finished difference. Result has 175 places, 161 transitions, 1445 flow [2024-06-21 21:10:01,773 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1376, PETRI_DIFFERENCE_MINUEND_PLACES=166, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=160, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=133, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1445, PETRI_PLACES=175, PETRI_TRANSITIONS=161} [2024-06-21 21:10:01,773 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 145 predicate places. [2024-06-21 21:10:01,774 INFO L495 AbstractCegarLoop]: Abstraction has has 175 places, 161 transitions, 1445 flow [2024-06-21 21:10:01,774 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 7.4) internal successors, (74), 10 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:10:01,774 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:10:01,774 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:10:01,774 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2024-06-21 21:10:01,774 INFO L420 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 21:10:01,774 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:10:01,775 INFO L85 PathProgramCache]: Analyzing trace with hash -1039119140, now seen corresponding path program 11 times [2024-06-21 21:10:01,775 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:10:01,775 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [5081587] [2024-06-21 21:10:01,775 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:10:01,775 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:10:01,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:10:02,289 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:10:02,289 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:10:02,289 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [5081587] [2024-06-21 21:10:02,289 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [5081587] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:10:02,289 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:10:02,289 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 21:10:02,290 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1747917025] [2024-06-21 21:10:02,290 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:10:02,290 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 21:10:02,290 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:10:02,290 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 21:10:02,290 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-21 21:10:02,355 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 21:10:02,356 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 175 places, 161 transitions, 1445 flow. Second operand has 10 states, 10 states have (on average 7.4) internal successors, (74), 10 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:10:02,356 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:10:02,356 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 21:10:02,356 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:10:02,603 INFO L124 PetriNetUnfolderBase]: 414/735 cut-off events. [2024-06-21 21:10:02,604 INFO L125 PetriNetUnfolderBase]: For 37299/37299 co-relation queries the response was YES. [2024-06-21 21:10:02,606 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4519 conditions, 735 events. 414/735 cut-off events. For 37299/37299 co-relation queries the response was YES. Maximal size of possible extension queue 75. Compared 3305 event pairs, 60 based on Foata normal form. 1/734 useless extension candidates. Maximal degree in co-relation 4439. Up to 694 conditions per place. [2024-06-21 21:10:02,608 INFO L140 encePairwiseOnDemand]: 21/31 looper letters, 148 selfloop transitions, 22 changer transitions 0/172 dead transitions. [2024-06-21 21:10:02,608 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 183 places, 172 transitions, 1842 flow [2024-06-21 21:10:02,608 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 21:10:02,609 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 21:10:02,609 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 100 transitions. [2024-06-21 21:10:02,609 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.35842293906810035 [2024-06-21 21:10:02,609 INFO L175 Difference]: Start difference. First operand has 175 places, 161 transitions, 1445 flow. Second operand 9 states and 100 transitions. [2024-06-21 21:10:02,609 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 183 places, 172 transitions, 1842 flow [2024-06-21 21:10:02,684 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 176 places, 172 transitions, 1784 flow, removed 3 selfloop flow, removed 7 redundant places. [2024-06-21 21:10:02,686 INFO L231 Difference]: Finished difference. Result has 177 places, 164 transitions, 1479 flow [2024-06-21 21:10:02,686 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1387, PETRI_DIFFERENCE_MINUEND_PLACES=168, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=161, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=140, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1479, PETRI_PLACES=177, PETRI_TRANSITIONS=164} [2024-06-21 21:10:02,686 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 147 predicate places. [2024-06-21 21:10:02,687 INFO L495 AbstractCegarLoop]: Abstraction has has 177 places, 164 transitions, 1479 flow [2024-06-21 21:10:02,687 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 7.4) internal successors, (74), 10 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:10:02,687 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:10:02,687 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:10:02,687 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2024-06-21 21:10:02,687 INFO L420 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 21:10:02,687 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:10:02,687 INFO L85 PathProgramCache]: Analyzing trace with hash -1039124720, now seen corresponding path program 12 times [2024-06-21 21:10:02,688 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:10:02,688 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1978779575] [2024-06-21 21:10:02,688 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:10:02,688 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:10:02,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:10:03,349 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:10:03,350 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:10:03,350 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1978779575] [2024-06-21 21:10:03,350 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1978779575] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:10:03,350 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:10:03,350 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 21:10:03,350 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [797916812] [2024-06-21 21:10:03,350 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:10:03,350 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 21:10:03,350 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:10:03,350 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 21:10:03,350 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-21 21:10:03,432 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 21:10:03,432 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 177 places, 164 transitions, 1479 flow. Second operand has 10 states, 10 states have (on average 7.4) internal successors, (74), 10 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:10:03,432 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:10:03,432 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 21:10:03,432 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:10:03,675 INFO L124 PetriNetUnfolderBase]: 417/740 cut-off events. [2024-06-21 21:10:03,676 INFO L125 PetriNetUnfolderBase]: For 38750/38750 co-relation queries the response was YES. [2024-06-21 21:10:03,678 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4570 conditions, 740 events. 417/740 cut-off events. For 38750/38750 co-relation queries the response was YES. Maximal size of possible extension queue 76. Compared 3341 event pairs, 58 based on Foata normal form. 1/739 useless extension candidates. Maximal degree in co-relation 4489. Up to 687 conditions per place. [2024-06-21 21:10:03,680 INFO L140 encePairwiseOnDemand]: 21/31 looper letters, 146 selfloop transitions, 27 changer transitions 0/175 dead transitions. [2024-06-21 21:10:03,680 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 185 places, 175 transitions, 1989 flow [2024-06-21 21:10:03,700 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 21:10:03,700 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 21:10:03,701 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 102 transitions. [2024-06-21 21:10:03,701 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3655913978494624 [2024-06-21 21:10:03,701 INFO L175 Difference]: Start difference. First operand has 177 places, 164 transitions, 1479 flow. Second operand 9 states and 102 transitions. [2024-06-21 21:10:03,701 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 185 places, 175 transitions, 1989 flow [2024-06-21 21:10:03,779 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 179 places, 175 transitions, 1900 flow, removed 12 selfloop flow, removed 6 redundant places. [2024-06-21 21:10:03,781 INFO L231 Difference]: Finished difference. Result has 180 places, 166 transitions, 1485 flow [2024-06-21 21:10:03,782 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1390, PETRI_DIFFERENCE_MINUEND_PLACES=171, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=164, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=139, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1485, PETRI_PLACES=180, PETRI_TRANSITIONS=166} [2024-06-21 21:10:03,782 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 150 predicate places. [2024-06-21 21:10:03,782 INFO L495 AbstractCegarLoop]: Abstraction has has 180 places, 166 transitions, 1485 flow [2024-06-21 21:10:03,782 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 7.4) internal successors, (74), 10 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:10:03,782 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:10:03,782 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:10:03,783 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57 [2024-06-21 21:10:03,783 INFO L420 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 21:10:03,783 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:10:03,783 INFO L85 PathProgramCache]: Analyzing trace with hash 1654554584, now seen corresponding path program 13 times [2024-06-21 21:10:03,783 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:10:03,783 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1536364390] [2024-06-21 21:10:03,783 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:10:03,784 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:10:03,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:10:04,346 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:10:04,346 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:10:04,346 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1536364390] [2024-06-21 21:10:04,346 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1536364390] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:10:04,346 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:10:04,347 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 21:10:04,347 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1044958719] [2024-06-21 21:10:04,347 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:10:04,347 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 21:10:04,349 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:10:04,349 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 21:10:04,349 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-21 21:10:04,418 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 21:10:04,419 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 180 places, 166 transitions, 1485 flow. Second operand has 10 states, 10 states have (on average 7.4) internal successors, (74), 10 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:10:04,419 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:10:04,419 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 21:10:04,419 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:10:04,649 INFO L124 PetriNetUnfolderBase]: 420/745 cut-off events. [2024-06-21 21:10:04,668 INFO L125 PetriNetUnfolderBase]: For 40143/40143 co-relation queries the response was YES. [2024-06-21 21:10:04,671 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4614 conditions, 745 events. 420/745 cut-off events. For 40143/40143 co-relation queries the response was YES. Maximal size of possible extension queue 77. Compared 3377 event pairs, 56 based on Foata normal form. 1/744 useless extension candidates. Maximal degree in co-relation 4532. Up to 704 conditions per place. [2024-06-21 21:10:04,674 INFO L140 encePairwiseOnDemand]: 20/31 looper letters, 152 selfloop transitions, 24 changer transitions 0/178 dead transitions. [2024-06-21 21:10:04,674 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 189 places, 178 transitions, 1913 flow [2024-06-21 21:10:04,674 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 21:10:04,674 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 21:10:04,674 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 108 transitions. [2024-06-21 21:10:04,675 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.34838709677419355 [2024-06-21 21:10:04,675 INFO L175 Difference]: Start difference. First operand has 180 places, 166 transitions, 1485 flow. Second operand 10 states and 108 transitions. [2024-06-21 21:10:04,675 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 189 places, 178 transitions, 1913 flow [2024-06-21 21:10:04,759 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 183 places, 178 transitions, 1838 flow, removed 14 selfloop flow, removed 6 redundant places. [2024-06-21 21:10:04,761 INFO L231 Difference]: Finished difference. Result has 184 places, 170 transitions, 1525 flow [2024-06-21 21:10:04,761 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1416, PETRI_DIFFERENCE_MINUEND_PLACES=174, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=166, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=144, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1525, PETRI_PLACES=184, PETRI_TRANSITIONS=170} [2024-06-21 21:10:04,762 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 154 predicate places. [2024-06-21 21:10:04,762 INFO L495 AbstractCegarLoop]: Abstraction has has 184 places, 170 transitions, 1525 flow [2024-06-21 21:10:04,762 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 7.4) internal successors, (74), 10 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:10:04,762 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:10:04,762 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:10:04,762 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58 [2024-06-21 21:10:04,763 INFO L420 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 21:10:04,763 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:10:04,763 INFO L85 PathProgramCache]: Analyzing trace with hash -1039124875, now seen corresponding path program 10 times [2024-06-21 21:10:04,763 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:10:04,763 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2083469705] [2024-06-21 21:10:04,763 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:10:04,763 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:10:04,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:10:05,363 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:10:05,363 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:10:05,363 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2083469705] [2024-06-21 21:10:05,363 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2083469705] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:10:05,363 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:10:05,364 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 21:10:05,364 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1714705536] [2024-06-21 21:10:05,364 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:10:05,364 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 21:10:05,364 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:10:05,364 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 21:10:05,364 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-21 21:10:05,426 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 21:10:05,426 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 184 places, 170 transitions, 1525 flow. Second operand has 10 states, 10 states have (on average 7.4) internal successors, (74), 10 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:10:05,426 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:10:05,426 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 21:10:05,426 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:10:05,613 INFO L124 PetriNetUnfolderBase]: 417/740 cut-off events. [2024-06-21 21:10:05,613 INFO L125 PetriNetUnfolderBase]: For 39941/39941 co-relation queries the response was YES. [2024-06-21 21:10:05,616 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4485 conditions, 740 events. 417/740 cut-off events. For 39941/39941 co-relation queries the response was YES. Maximal size of possible extension queue 77. Compared 3352 event pairs, 55 based on Foata normal form. 2/740 useless extension candidates. Maximal degree in co-relation 4402. Up to 711 conditions per place. [2024-06-21 21:10:05,618 INFO L140 encePairwiseOnDemand]: 22/31 looper letters, 162 selfloop transitions, 15 changer transitions 0/179 dead transitions. [2024-06-21 21:10:05,618 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 192 places, 179 transitions, 1899 flow [2024-06-21 21:10:05,618 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 21:10:05,618 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 21:10:05,619 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 97 transitions. [2024-06-21 21:10:05,619 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.34767025089605735 [2024-06-21 21:10:05,619 INFO L175 Difference]: Start difference. First operand has 184 places, 170 transitions, 1525 flow. Second operand 9 states and 97 transitions. [2024-06-21 21:10:05,619 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 192 places, 179 transitions, 1899 flow [2024-06-21 21:10:05,704 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 187 places, 179 transitions, 1839 flow, removed 16 selfloop flow, removed 5 redundant places. [2024-06-21 21:10:05,707 INFO L231 Difference]: Finished difference. Result has 188 places, 170 transitions, 1499 flow [2024-06-21 21:10:05,707 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1465, PETRI_DIFFERENCE_MINUEND_PLACES=179, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=170, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=155, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1499, PETRI_PLACES=188, PETRI_TRANSITIONS=170} [2024-06-21 21:10:05,707 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 158 predicate places. [2024-06-21 21:10:05,707 INFO L495 AbstractCegarLoop]: Abstraction has has 188 places, 170 transitions, 1499 flow [2024-06-21 21:10:05,707 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 7.4) internal successors, (74), 10 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:10:05,708 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:10:05,708 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:10:05,708 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59 [2024-06-21 21:10:05,708 INFO L420 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 21:10:05,708 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:10:05,708 INFO L85 PathProgramCache]: Analyzing trace with hash 1911322221, now seen corresponding path program 1 times [2024-06-21 21:10:05,708 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:10:05,709 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [362000236] [2024-06-21 21:10:05,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:10:05,709 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:10:05,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:10:06,233 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:10:06,234 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:10:06,234 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [362000236] [2024-06-21 21:10:06,234 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [362000236] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:10:06,234 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:10:06,234 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 21:10:06,234 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1459524118] [2024-06-21 21:10:06,234 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:10:06,235 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 21:10:06,235 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:10:06,235 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 21:10:06,235 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-21 21:10:06,304 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 21:10:06,304 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 188 places, 170 transitions, 1499 flow. Second operand has 10 states, 10 states have (on average 7.4) internal successors, (74), 10 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:10:06,304 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:10:06,304 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 21:10:06,305 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:10:06,520 INFO L124 PetriNetUnfolderBase]: 413/734 cut-off events. [2024-06-21 21:10:06,521 INFO L125 PetriNetUnfolderBase]: For 37967/37967 co-relation queries the response was YES. [2024-06-21 21:10:06,523 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4340 conditions, 734 events. 413/734 cut-off events. For 37967/37967 co-relation queries the response was YES. Maximal size of possible extension queue 77. Compared 3295 event pairs, 50 based on Foata normal form. 2/734 useless extension candidates. Maximal degree in co-relation 4256. Up to 695 conditions per place. [2024-06-21 21:10:06,525 INFO L140 encePairwiseOnDemand]: 21/31 looper letters, 165 selfloop transitions, 16 changer transitions 0/183 dead transitions. [2024-06-21 21:10:06,525 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 196 places, 183 transitions, 1903 flow [2024-06-21 21:10:06,526 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 21:10:06,526 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 21:10:06,526 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 100 transitions. [2024-06-21 21:10:06,527 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.35842293906810035 [2024-06-21 21:10:06,527 INFO L175 Difference]: Start difference. First operand has 188 places, 170 transitions, 1499 flow. Second operand 9 states and 100 transitions. [2024-06-21 21:10:06,527 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 196 places, 183 transitions, 1903 flow [2024-06-21 21:10:06,598 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 187 places, 183 transitions, 1826 flow, removed 2 selfloop flow, removed 9 redundant places. [2024-06-21 21:10:06,600 INFO L231 Difference]: Finished difference. Result has 188 places, 172 transitions, 1481 flow [2024-06-21 21:10:06,601 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1422, PETRI_DIFFERENCE_MINUEND_PLACES=179, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=170, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=154, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1481, PETRI_PLACES=188, PETRI_TRANSITIONS=172} [2024-06-21 21:10:06,602 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 158 predicate places. [2024-06-21 21:10:06,602 INFO L495 AbstractCegarLoop]: Abstraction has has 188 places, 172 transitions, 1481 flow [2024-06-21 21:10:06,602 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 7.4) internal successors, (74), 10 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:10:06,602 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:10:06,602 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:10:06,602 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60 [2024-06-21 21:10:06,602 INFO L420 AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 21:10:06,603 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:10:06,603 INFO L85 PathProgramCache]: Analyzing trace with hash -1031767490, now seen corresponding path program 14 times [2024-06-21 21:10:06,603 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:10:06,603 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1148930931] [2024-06-21 21:10:06,603 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:10:06,603 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:10:06,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:10:07,204 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:10:07,205 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:10:07,205 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1148930931] [2024-06-21 21:10:07,205 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1148930931] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:10:07,205 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:10:07,205 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 21:10:07,206 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [342733429] [2024-06-21 21:10:07,206 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:10:07,206 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 21:10:07,206 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:10:07,206 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 21:10:07,207 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-21 21:10:07,324 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 21:10:07,324 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 188 places, 172 transitions, 1481 flow. Second operand has 10 states, 10 states have (on average 7.4) internal successors, (74), 10 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:10:07,325 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:10:07,325 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 21:10:07,325 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:10:07,593 INFO L124 PetriNetUnfolderBase]: 411/731 cut-off events. [2024-06-21 21:10:07,594 INFO L125 PetriNetUnfolderBase]: For 35790/35790 co-relation queries the response was YES. [2024-06-21 21:10:07,597 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4254 conditions, 731 events. 411/731 cut-off events. For 35790/35790 co-relation queries the response was YES. Maximal size of possible extension queue 77. Compared 3300 event pairs, 54 based on Foata normal form. 1/730 useless extension candidates. Maximal degree in co-relation 4169. Up to 705 conditions per place. [2024-06-21 21:10:07,599 INFO L140 encePairwiseOnDemand]: 21/31 looper letters, 162 selfloop transitions, 16 changer transitions 0/180 dead transitions. [2024-06-21 21:10:07,599 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 196 places, 180 transitions, 1855 flow [2024-06-21 21:10:07,600 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 21:10:07,600 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 21:10:07,600 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 97 transitions. [2024-06-21 21:10:07,600 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.34767025089605735 [2024-06-21 21:10:07,601 INFO L175 Difference]: Start difference. First operand has 188 places, 172 transitions, 1481 flow. Second operand 9 states and 97 transitions. [2024-06-21 21:10:07,601 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 196 places, 180 transitions, 1855 flow [2024-06-21 21:10:07,680 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 189 places, 180 transitions, 1790 flow, removed 18 selfloop flow, removed 7 redundant places. [2024-06-21 21:10:07,682 INFO L231 Difference]: Finished difference. Result has 190 places, 172 transitions, 1453 flow [2024-06-21 21:10:07,682 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1416, PETRI_DIFFERENCE_MINUEND_PLACES=181, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=172, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=156, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1453, PETRI_PLACES=190, PETRI_TRANSITIONS=172} [2024-06-21 21:10:07,682 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 160 predicate places. [2024-06-21 21:10:07,682 INFO L495 AbstractCegarLoop]: Abstraction has has 190 places, 172 transitions, 1453 flow [2024-06-21 21:10:07,682 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 7.4) internal successors, (74), 10 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:10:07,683 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:10:07,683 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:10:07,683 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61 [2024-06-21 21:10:07,683 INFO L420 AbstractCegarLoop]: === Iteration 63 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 21:10:07,683 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:10:07,683 INFO L85 PathProgramCache]: Analyzing trace with hash 2127775880, now seen corresponding path program 1 times [2024-06-21 21:10:07,683 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:10:07,684 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1793424241] [2024-06-21 21:10:07,684 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:10:07,684 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:10:07,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:10:08,505 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:10:08,505 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:10:08,505 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1793424241] [2024-06-21 21:10:08,505 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1793424241] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:10:08,505 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:10:08,505 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 21:10:08,505 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1281002313] [2024-06-21 21:10:08,505 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:10:08,505 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 21:10:08,505 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:10:08,506 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 21:10:08,506 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2024-06-21 21:10:08,583 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 21:10:08,583 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 190 places, 172 transitions, 1453 flow. Second operand has 11 states, 11 states have (on average 7.363636363636363) internal successors, (81), 11 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:10:08,584 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:10:08,584 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 21:10:08,584 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:10:08,864 INFO L124 PetriNetUnfolderBase]: 454/814 cut-off events. [2024-06-21 21:10:08,865 INFO L125 PetriNetUnfolderBase]: For 59165/59165 co-relation queries the response was YES. [2024-06-21 21:10:08,868 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5240 conditions, 814 events. 454/814 cut-off events. For 59165/59165 co-relation queries the response was YES. Maximal size of possible extension queue 78. Compared 3762 event pairs, 44 based on Foata normal form. 2/814 useless extension candidates. Maximal degree in co-relation 5154. Up to 264 conditions per place. [2024-06-21 21:10:08,870 INFO L140 encePairwiseOnDemand]: 20/31 looper letters, 109 selfloop transitions, 91 changer transitions 0/202 dead transitions. [2024-06-21 21:10:08,870 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 199 places, 202 transitions, 2209 flow [2024-06-21 21:10:08,870 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 21:10:08,871 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 21:10:08,871 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 130 transitions. [2024-06-21 21:10:08,871 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41935483870967744 [2024-06-21 21:10:08,871 INFO L175 Difference]: Start difference. First operand has 190 places, 172 transitions, 1453 flow. Second operand 10 states and 130 transitions. [2024-06-21 21:10:08,871 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 199 places, 202 transitions, 2209 flow [2024-06-21 21:10:08,971 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 190 places, 202 transitions, 2122 flow, removed 5 selfloop flow, removed 9 redundant places. [2024-06-21 21:10:08,974 INFO L231 Difference]: Finished difference. Result has 192 places, 175 transitions, 1656 flow [2024-06-21 21:10:08,974 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1366, PETRI_DIFFERENCE_MINUEND_PLACES=181, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=172, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=88, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=82, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1656, PETRI_PLACES=192, PETRI_TRANSITIONS=175} [2024-06-21 21:10:08,975 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 162 predicate places. [2024-06-21 21:10:08,975 INFO L495 AbstractCegarLoop]: Abstraction has has 192 places, 175 transitions, 1656 flow [2024-06-21 21:10:08,975 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 7.363636363636363) internal successors, (81), 11 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:10:08,975 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:10:08,975 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:10:08,975 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62 [2024-06-21 21:10:08,975 INFO L420 AbstractCegarLoop]: === Iteration 64 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 21:10:08,976 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:10:08,976 INFO L85 PathProgramCache]: Analyzing trace with hash -2109098966, now seen corresponding path program 2 times [2024-06-21 21:10:08,976 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:10:08,976 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1785042630] [2024-06-21 21:10:08,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:10:08,976 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:10:08,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:10:09,828 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:10:09,829 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:10:09,829 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1785042630] [2024-06-21 21:10:09,829 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1785042630] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:10:09,829 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:10:09,829 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 21:10:09,829 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [184269776] [2024-06-21 21:10:09,829 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:10:09,829 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 21:10:09,829 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:10:09,829 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 21:10:09,830 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-06-21 21:10:09,915 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 21:10:09,916 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 192 places, 175 transitions, 1656 flow. Second operand has 11 states, 11 states have (on average 7.363636363636363) internal successors, (81), 11 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:10:09,916 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:10:09,916 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 21:10:09,916 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:10:10,187 INFO L124 PetriNetUnfolderBase]: 465/835 cut-off events. [2024-06-21 21:10:10,187 INFO L125 PetriNetUnfolderBase]: For 65295/65295 co-relation queries the response was YES. [2024-06-21 21:10:10,190 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5736 conditions, 835 events. 465/835 cut-off events. For 65295/65295 co-relation queries the response was YES. Maximal size of possible extension queue 80. Compared 3902 event pairs, 65 based on Foata normal form. 2/835 useless extension candidates. Maximal degree in co-relation 5649. Up to 470 conditions per place. [2024-06-21 21:10:10,192 INFO L140 encePairwiseOnDemand]: 20/31 looper letters, 106 selfloop transitions, 91 changer transitions 0/199 dead transitions. [2024-06-21 21:10:10,193 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 201 places, 199 transitions, 2356 flow [2024-06-21 21:10:10,193 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 21:10:10,193 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 21:10:10,193 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 131 transitions. [2024-06-21 21:10:10,194 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42258064516129035 [2024-06-21 21:10:10,194 INFO L175 Difference]: Start difference. First operand has 192 places, 175 transitions, 1656 flow. Second operand 10 states and 131 transitions. [2024-06-21 21:10:10,194 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 201 places, 199 transitions, 2356 flow [2024-06-21 21:10:10,300 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 195 places, 199 transitions, 2274 flow, removed 2 selfloop flow, removed 6 redundant places. [2024-06-21 21:10:10,302 INFO L231 Difference]: Finished difference. Result has 196 places, 177 transitions, 1774 flow [2024-06-21 21:10:10,303 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1576, PETRI_DIFFERENCE_MINUEND_PLACES=186, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=175, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=90, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=85, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1774, PETRI_PLACES=196, PETRI_TRANSITIONS=177} [2024-06-21 21:10:10,303 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 166 predicate places. [2024-06-21 21:10:10,303 INFO L495 AbstractCegarLoop]: Abstraction has has 196 places, 177 transitions, 1774 flow [2024-06-21 21:10:10,303 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 7.363636363636363) internal successors, (81), 11 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:10:10,303 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:10:10,304 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:10:10,304 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63 [2024-06-21 21:10:10,304 INFO L420 AbstractCegarLoop]: === Iteration 65 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 21:10:10,304 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:10:10,304 INFO L85 PathProgramCache]: Analyzing trace with hash -2108983646, now seen corresponding path program 3 times [2024-06-21 21:10:10,304 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:10:10,304 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1879605943] [2024-06-21 21:10:10,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:10:10,305 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:10:10,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:10:11,065 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:10:11,065 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:10:11,065 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1879605943] [2024-06-21 21:10:11,066 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1879605943] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:10:11,066 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:10:11,066 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 21:10:11,066 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2045473496] [2024-06-21 21:10:11,066 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:10:11,066 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 21:10:11,066 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:10:11,067 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 21:10:11,067 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2024-06-21 21:10:11,136 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 21:10:11,136 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 196 places, 177 transitions, 1774 flow. Second operand has 11 states, 11 states have (on average 7.363636363636363) internal successors, (81), 11 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:10:11,137 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:10:11,137 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 21:10:11,137 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:10:11,477 INFO L124 PetriNetUnfolderBase]: 538/982 cut-off events. [2024-06-21 21:10:11,477 INFO L125 PetriNetUnfolderBase]: For 111825/111825 co-relation queries the response was YES. [2024-06-21 21:10:11,481 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7746 conditions, 982 events. 538/982 cut-off events. For 111825/111825 co-relation queries the response was YES. Maximal size of possible extension queue 83. Compared 4838 event pairs, 98 based on Foata normal form. 4/984 useless extension candidates. Maximal degree in co-relation 7658. Up to 476 conditions per place. [2024-06-21 21:10:11,483 INFO L140 encePairwiseOnDemand]: 19/31 looper letters, 105 selfloop transitions, 104 changer transitions 0/211 dead transitions. [2024-06-21 21:10:11,483 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 207 places, 211 transitions, 2573 flow [2024-06-21 21:10:11,484 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-21 21:10:11,484 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-21 21:10:11,484 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 160 transitions. [2024-06-21 21:10:11,485 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43010752688172044 [2024-06-21 21:10:11,485 INFO L175 Difference]: Start difference. First operand has 196 places, 177 transitions, 1774 flow. Second operand 12 states and 160 transitions. [2024-06-21 21:10:11,485 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 207 places, 211 transitions, 2573 flow [2024-06-21 21:10:11,620 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 201 places, 211 transitions, 2448 flow, removed 3 selfloop flow, removed 6 redundant places. [2024-06-21 21:10:11,622 INFO L231 Difference]: Finished difference. Result has 203 places, 181 transitions, 1919 flow [2024-06-21 21:10:11,622 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1651, PETRI_DIFFERENCE_MINUEND_PLACES=190, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=177, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=101, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=75, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=1919, PETRI_PLACES=203, PETRI_TRANSITIONS=181} [2024-06-21 21:10:11,623 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 173 predicate places. [2024-06-21 21:10:11,623 INFO L495 AbstractCegarLoop]: Abstraction has has 203 places, 181 transitions, 1919 flow [2024-06-21 21:10:11,623 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 7.363636363636363) internal successors, (81), 11 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:10:11,623 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:10:11,623 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:10:11,623 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64 [2024-06-21 21:10:11,623 INFO L420 AbstractCegarLoop]: === Iteration 66 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 21:10:11,624 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:10:11,624 INFO L85 PathProgramCache]: Analyzing trace with hash 98160450, now seen corresponding path program 1 times [2024-06-21 21:10:11,624 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:10:11,624 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1629918019] [2024-06-21 21:10:11,624 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:10:11,624 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:10:11,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:10:12,369 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:10:12,369 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:10:12,369 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1629918019] [2024-06-21 21:10:12,369 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1629918019] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:10:12,369 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:10:12,369 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 21:10:12,370 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1546055216] [2024-06-21 21:10:12,370 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:10:12,370 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 21:10:12,370 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:10:12,370 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 21:10:12,370 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2024-06-21 21:10:12,460 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 21:10:12,460 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 203 places, 181 transitions, 1919 flow. Second operand has 11 states, 11 states have (on average 7.363636363636363) internal successors, (81), 11 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:10:12,460 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:10:12,460 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 21:10:12,460 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:10:12,962 INFO L124 PetriNetUnfolderBase]: 554/1008 cut-off events. [2024-06-21 21:10:12,962 INFO L125 PetriNetUnfolderBase]: For 115946/115946 co-relation queries the response was YES. [2024-06-21 21:10:12,986 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8314 conditions, 1008 events. 554/1008 cut-off events. For 115946/115946 co-relation queries the response was YES. Maximal size of possible extension queue 84. Compared 4965 event pairs, 108 based on Foata normal form. 2/1008 useless extension candidates. Maximal degree in co-relation 8223. Up to 645 conditions per place. [2024-06-21 21:10:12,989 INFO L140 encePairwiseOnDemand]: 19/31 looper letters, 113 selfloop transitions, 95 changer transitions 0/210 dead transitions. [2024-06-21 21:10:12,989 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 216 places, 210 transitions, 2583 flow [2024-06-21 21:10:12,990 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-06-21 21:10:12,990 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2024-06-21 21:10:12,995 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 170 transitions. [2024-06-21 21:10:12,995 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.391705069124424 [2024-06-21 21:10:12,995 INFO L175 Difference]: Start difference. First operand has 203 places, 181 transitions, 1919 flow. Second operand 14 states and 170 transitions. [2024-06-21 21:10:12,995 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 216 places, 210 transitions, 2583 flow [2024-06-21 21:10:13,157 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 208 places, 210 transitions, 2430 flow, removed 3 selfloop flow, removed 8 redundant places. [2024-06-21 21:10:13,160 INFO L231 Difference]: Finished difference. Result has 209 places, 185 transitions, 2032 flow [2024-06-21 21:10:13,160 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1766, PETRI_DIFFERENCE_MINUEND_PLACES=195, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=181, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=93, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=88, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=2032, PETRI_PLACES=209, PETRI_TRANSITIONS=185} [2024-06-21 21:10:13,160 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 179 predicate places. [2024-06-21 21:10:13,160 INFO L495 AbstractCegarLoop]: Abstraction has has 209 places, 185 transitions, 2032 flow [2024-06-21 21:10:13,160 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 7.363636363636363) internal successors, (81), 11 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:10:13,160 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:10:13,161 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:10:13,161 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65 [2024-06-21 21:10:13,161 INFO L420 AbstractCegarLoop]: === Iteration 67 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 21:10:13,161 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:10:13,161 INFO L85 PathProgramCache]: Analyzing trace with hash -2108978996, now seen corresponding path program 4 times [2024-06-21 21:10:13,161 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:10:13,162 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2097729487] [2024-06-21 21:10:13,162 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:10:13,162 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:10:13,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:10:13,957 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:10:13,957 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:10:13,958 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2097729487] [2024-06-21 21:10:13,958 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2097729487] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:10:13,958 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:10:13,958 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 21:10:13,958 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [872238182] [2024-06-21 21:10:13,958 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:10:13,958 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 21:10:13,958 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:10:13,959 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 21:10:13,959 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2024-06-21 21:10:14,028 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 21:10:14,028 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 209 places, 185 transitions, 2032 flow. Second operand has 11 states, 11 states have (on average 7.363636363636363) internal successors, (81), 11 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:10:14,028 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:10:14,028 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 21:10:14,028 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:10:14,291 INFO L124 PetriNetUnfolderBase]: 551/1003 cut-off events. [2024-06-21 21:10:14,291 INFO L125 PetriNetUnfolderBase]: For 115670/115670 co-relation queries the response was YES. [2024-06-21 21:10:14,295 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8413 conditions, 1003 events. 551/1003 cut-off events. For 115670/115670 co-relation queries the response was YES. Maximal size of possible extension queue 84. Compared 4963 event pairs, 125 based on Foata normal form. 2/1003 useless extension candidates. Maximal degree in co-relation 8320. Up to 809 conditions per place. [2024-06-21 21:10:14,298 INFO L140 encePairwiseOnDemand]: 21/31 looper letters, 126 selfloop transitions, 73 changer transitions 0/201 dead transitions. [2024-06-21 21:10:14,298 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 218 places, 201 transitions, 2472 flow [2024-06-21 21:10:14,298 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 21:10:14,299 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 21:10:14,299 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 121 transitions. [2024-06-21 21:10:14,299 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3903225806451613 [2024-06-21 21:10:14,299 INFO L175 Difference]: Start difference. First operand has 209 places, 185 transitions, 2032 flow. Second operand 10 states and 121 transitions. [2024-06-21 21:10:14,299 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 218 places, 201 transitions, 2472 flow [2024-06-21 21:10:14,463 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 207 places, 201 transitions, 2332 flow, removed 21 selfloop flow, removed 11 redundant places. [2024-06-21 21:10:14,486 INFO L231 Difference]: Finished difference. Result has 208 places, 185 transitions, 2042 flow [2024-06-21 21:10:14,487 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1892, PETRI_DIFFERENCE_MINUEND_PLACES=198, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=185, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=73, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=112, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2042, PETRI_PLACES=208, PETRI_TRANSITIONS=185} [2024-06-21 21:10:14,487 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 178 predicate places. [2024-06-21 21:10:14,487 INFO L495 AbstractCegarLoop]: Abstraction has has 208 places, 185 transitions, 2042 flow [2024-06-21 21:10:14,487 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 7.363636363636363) internal successors, (81), 11 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:10:14,487 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:10:14,487 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:10:14,488 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66 [2024-06-21 21:10:14,488 INFO L420 AbstractCegarLoop]: === Iteration 68 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 21:10:14,488 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:10:14,488 INFO L85 PathProgramCache]: Analyzing trace with hash 583108744, now seen corresponding path program 5 times [2024-06-21 21:10:14,488 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:10:14,489 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1933881213] [2024-06-21 21:10:14,489 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:10:14,489 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:10:14,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:10:15,267 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:10:15,267 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:10:15,267 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1933881213] [2024-06-21 21:10:15,267 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1933881213] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:10:15,267 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:10:15,268 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 21:10:15,268 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [480306917] [2024-06-21 21:10:15,268 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:10:15,268 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 21:10:15,268 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:10:15,268 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 21:10:15,269 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2024-06-21 21:10:15,376 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 21:10:15,376 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 208 places, 185 transitions, 2042 flow. Second operand has 11 states, 11 states have (on average 7.363636363636363) internal successors, (81), 11 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:10:15,377 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:10:15,377 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 21:10:15,377 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:10:15,647 INFO L124 PetriNetUnfolderBase]: 555/1011 cut-off events. [2024-06-21 21:10:15,647 INFO L125 PetriNetUnfolderBase]: For 119057/119057 co-relation queries the response was YES. [2024-06-21 21:10:15,651 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8443 conditions, 1011 events. 555/1011 cut-off events. For 119057/119057 co-relation queries the response was YES. Maximal size of possible extension queue 85. Compared 5034 event pairs, 123 based on Foata normal form. 2/1011 useless extension candidates. Maximal degree in co-relation 8349. Up to 895 conditions per place. [2024-06-21 21:10:15,654 INFO L140 encePairwiseOnDemand]: 20/31 looper letters, 156 selfloop transitions, 41 changer transitions 0/199 dead transitions. [2024-06-21 21:10:15,654 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 217 places, 199 transitions, 2478 flow [2024-06-21 21:10:15,655 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 21:10:15,655 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 21:10:15,655 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 118 transitions. [2024-06-21 21:10:15,656 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38064516129032255 [2024-06-21 21:10:15,656 INFO L175 Difference]: Start difference. First operand has 208 places, 185 transitions, 2042 flow. Second operand 10 states and 118 transitions. [2024-06-21 21:10:15,656 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 217 places, 199 transitions, 2478 flow [2024-06-21 21:10:15,837 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 209 places, 199 transitions, 2334 flow, removed 0 selfloop flow, removed 8 redundant places. [2024-06-21 21:10:15,839 INFO L231 Difference]: Finished difference. Result has 210 places, 186 transitions, 1996 flow [2024-06-21 21:10:15,840 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1898, PETRI_DIFFERENCE_MINUEND_PLACES=200, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=185, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=144, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1996, PETRI_PLACES=210, PETRI_TRANSITIONS=186} [2024-06-21 21:10:15,840 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 180 predicate places. [2024-06-21 21:10:15,840 INFO L495 AbstractCegarLoop]: Abstraction has has 210 places, 186 transitions, 1996 flow [2024-06-21 21:10:15,840 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 7.363636363636363) internal successors, (81), 11 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:10:15,840 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:10:15,841 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:10:15,841 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67 [2024-06-21 21:10:15,841 INFO L420 AbstractCegarLoop]: === Iteration 69 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 21:10:15,841 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:10:15,841 INFO L85 PathProgramCache]: Analyzing trace with hash 117196620, now seen corresponding path program 6 times [2024-06-21 21:10:15,841 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:10:15,841 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1941954548] [2024-06-21 21:10:15,841 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:10:15,842 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:10:15,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:10:16,608 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:10:16,609 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:10:16,609 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1941954548] [2024-06-21 21:10:16,609 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1941954548] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:10:16,609 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:10:16,609 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 21:10:16,609 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1421397849] [2024-06-21 21:10:16,609 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:10:16,610 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 21:10:16,610 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:10:16,610 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 21:10:16,610 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-06-21 21:10:16,704 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 21:10:16,704 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 210 places, 186 transitions, 1996 flow. Second operand has 11 states, 11 states have (on average 7.363636363636363) internal successors, (81), 11 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:10:16,704 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:10:16,704 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 21:10:16,704 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:10:16,984 INFO L124 PetriNetUnfolderBase]: 559/1019 cut-off events. [2024-06-21 21:10:16,984 INFO L125 PetriNetUnfolderBase]: For 122687/122687 co-relation queries the response was YES. [2024-06-21 21:10:16,989 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8483 conditions, 1019 events. 559/1019 cut-off events. For 122687/122687 co-relation queries the response was YES. Maximal size of possible extension queue 86. Compared 5091 event pairs, 121 based on Foata normal form. 2/1019 useless extension candidates. Maximal degree in co-relation 8388. Up to 897 conditions per place. [2024-06-21 21:10:16,992 INFO L140 encePairwiseOnDemand]: 20/31 looper letters, 154 selfloop transitions, 44 changer transitions 0/200 dead transitions. [2024-06-21 21:10:16,992 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 219 places, 200 transitions, 2436 flow [2024-06-21 21:10:17,008 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 21:10:17,008 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 21:10:17,008 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 119 transitions. [2024-06-21 21:10:17,009 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38387096774193546 [2024-06-21 21:10:17,009 INFO L175 Difference]: Start difference. First operand has 210 places, 186 transitions, 1996 flow. Second operand 10 states and 119 transitions. [2024-06-21 21:10:17,009 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 219 places, 200 transitions, 2436 flow [2024-06-21 21:10:17,193 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 211 places, 200 transitions, 2352 flow, removed 2 selfloop flow, removed 8 redundant places. [2024-06-21 21:10:17,195 INFO L231 Difference]: Finished difference. Result has 212 places, 187 transitions, 2018 flow [2024-06-21 21:10:17,195 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1912, PETRI_DIFFERENCE_MINUEND_PLACES=202, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=186, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=142, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2018, PETRI_PLACES=212, PETRI_TRANSITIONS=187} [2024-06-21 21:10:17,196 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 182 predicate places. [2024-06-21 21:10:17,196 INFO L495 AbstractCegarLoop]: Abstraction has has 212 places, 187 transitions, 2018 flow [2024-06-21 21:10:17,196 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 7.363636363636363) internal successors, (81), 11 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:10:17,196 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:10:17,196 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:10:17,196 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68 [2024-06-21 21:10:17,196 INFO L420 AbstractCegarLoop]: === Iteration 70 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 21:10:17,197 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:10:17,197 INFO L85 PathProgramCache]: Analyzing trace with hash 112608000, now seen corresponding path program 7 times [2024-06-21 21:10:17,197 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:10:17,197 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1140406455] [2024-06-21 21:10:17,197 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:10:17,197 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:10:17,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:10:17,946 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:10:17,947 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:10:17,947 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1140406455] [2024-06-21 21:10:17,947 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1140406455] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:10:17,947 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:10:17,947 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 21:10:17,947 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1244145338] [2024-06-21 21:10:17,947 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:10:17,948 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 21:10:17,948 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:10:17,948 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 21:10:17,948 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-06-21 21:10:18,042 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 21:10:18,042 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 212 places, 187 transitions, 2018 flow. Second operand has 11 states, 11 states have (on average 7.363636363636363) internal successors, (81), 11 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:10:18,042 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:10:18,042 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 21:10:18,042 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:10:18,281 INFO L124 PetriNetUnfolderBase]: 563/1027 cut-off events. [2024-06-21 21:10:18,281 INFO L125 PetriNetUnfolderBase]: For 126415/126415 co-relation queries the response was YES. [2024-06-21 21:10:18,286 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8576 conditions, 1027 events. 563/1027 cut-off events. For 126415/126415 co-relation queries the response was YES. Maximal size of possible extension queue 87. Compared 5125 event pairs, 123 based on Foata normal form. 2/1027 useless extension candidates. Maximal degree in co-relation 8480. Up to 835 conditions per place. [2024-06-21 21:10:18,289 INFO L140 encePairwiseOnDemand]: 20/31 looper letters, 150 selfloop transitions, 52 changer transitions 0/204 dead transitions. [2024-06-21 21:10:18,289 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 221 places, 204 transitions, 2601 flow [2024-06-21 21:10:18,289 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 21:10:18,289 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 21:10:18,293 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 123 transitions. [2024-06-21 21:10:18,293 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3967741935483871 [2024-06-21 21:10:18,293 INFO L175 Difference]: Start difference. First operand has 212 places, 187 transitions, 2018 flow. Second operand 10 states and 123 transitions. [2024-06-21 21:10:18,293 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 221 places, 204 transitions, 2601 flow [2024-06-21 21:10:18,507 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 212 places, 204 transitions, 2495 flow, removed 5 selfloop flow, removed 9 redundant places. [2024-06-21 21:10:18,528 INFO L231 Difference]: Finished difference. Result has 213 places, 188 transitions, 2031 flow [2024-06-21 21:10:18,529 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1912, PETRI_DIFFERENCE_MINUEND_PLACES=203, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=187, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=51, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=135, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2031, PETRI_PLACES=213, PETRI_TRANSITIONS=188} [2024-06-21 21:10:18,529 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 183 predicate places. [2024-06-21 21:10:18,529 INFO L495 AbstractCegarLoop]: Abstraction has has 213 places, 188 transitions, 2031 flow [2024-06-21 21:10:18,529 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 7.363636363636363) internal successors, (81), 11 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:10:18,529 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:10:18,529 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:10:18,529 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable69 [2024-06-21 21:10:18,530 INFO L420 AbstractCegarLoop]: === Iteration 71 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 21:10:18,530 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:10:18,530 INFO L85 PathProgramCache]: Analyzing trace with hash 578467114, now seen corresponding path program 8 times [2024-06-21 21:10:18,530 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:10:18,530 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [437020727] [2024-06-21 21:10:18,530 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:10:18,530 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:10:18,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:10:19,410 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:10:19,410 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:10:19,410 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [437020727] [2024-06-21 21:10:19,410 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [437020727] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:10:19,410 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:10:19,411 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 21:10:19,411 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1735372099] [2024-06-21 21:10:19,411 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:10:19,411 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 21:10:19,411 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:10:19,411 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 21:10:19,412 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2024-06-21 21:10:19,497 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 21:10:19,497 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 213 places, 188 transitions, 2031 flow. Second operand has 11 states, 11 states have (on average 7.363636363636363) internal successors, (81), 11 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:10:19,497 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:10:19,497 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 21:10:19,497 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:10:19,928 INFO L124 PetriNetUnfolderBase]: 534/976 cut-off events. [2024-06-21 21:10:19,928 INFO L125 PetriNetUnfolderBase]: For 126140/126140 co-relation queries the response was YES. [2024-06-21 21:10:19,933 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7008 conditions, 976 events. 534/976 cut-off events. For 126140/126140 co-relation queries the response was YES. Maximal size of possible extension queue 87. Compared 4863 event pairs, 88 based on Foata normal form. 22/996 useless extension candidates. Maximal degree in co-relation 6912. Up to 665 conditions per place. [2024-06-21 21:10:19,935 INFO L140 encePairwiseOnDemand]: 19/31 looper letters, 140 selfloop transitions, 61 changer transitions 8/211 dead transitions. [2024-06-21 21:10:19,936 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 224 places, 211 transitions, 2529 flow [2024-06-21 21:10:19,936 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-21 21:10:19,936 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-21 21:10:19,936 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 148 transitions. [2024-06-21 21:10:19,936 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3978494623655914 [2024-06-21 21:10:19,937 INFO L175 Difference]: Start difference. First operand has 213 places, 188 transitions, 2031 flow. Second operand 12 states and 148 transitions. [2024-06-21 21:10:19,937 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 224 places, 211 transitions, 2529 flow [2024-06-21 21:10:20,103 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 217 places, 211 transitions, 2420 flow, removed 9 selfloop flow, removed 7 redundant places. [2024-06-21 21:10:20,105 INFO L231 Difference]: Finished difference. Result has 218 places, 185 transitions, 2023 flow [2024-06-21 21:10:20,106 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1922, PETRI_DIFFERENCE_MINUEND_PLACES=206, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=188, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=61, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=127, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=2023, PETRI_PLACES=218, PETRI_TRANSITIONS=185} [2024-06-21 21:10:20,107 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 188 predicate places. [2024-06-21 21:10:20,107 INFO L495 AbstractCegarLoop]: Abstraction has has 218 places, 185 transitions, 2023 flow [2024-06-21 21:10:20,108 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 7.363636363636363) internal successors, (81), 11 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:10:20,108 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:10:20,108 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:10:20,108 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70 [2024-06-21 21:10:20,108 INFO L420 AbstractCegarLoop]: === Iteration 72 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 21:10:20,108 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:10:20,108 INFO L85 PathProgramCache]: Analyzing trace with hash -541846764, now seen corresponding path program 9 times [2024-06-21 21:10:20,108 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:10:20,109 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [441823098] [2024-06-21 21:10:20,109 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:10:20,109 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:10:20,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:10:20,928 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:10:20,929 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:10:20,929 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [441823098] [2024-06-21 21:10:20,929 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [441823098] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:10:20,929 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:10:20,929 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 21:10:20,929 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [289891983] [2024-06-21 21:10:20,929 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:10:20,929 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 21:10:20,930 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:10:20,930 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 21:10:20,930 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2024-06-21 21:10:21,018 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 21:10:21,019 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 218 places, 185 transitions, 2023 flow. Second operand has 11 states, 11 states have (on average 7.363636363636363) internal successors, (81), 11 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:10:21,019 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:10:21,019 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 21:10:21,019 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:10:21,374 INFO L124 PetriNetUnfolderBase]: 534/980 cut-off events. [2024-06-21 21:10:21,375 INFO L125 PetriNetUnfolderBase]: For 101629/101629 co-relation queries the response was YES. [2024-06-21 21:10:21,379 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7575 conditions, 980 events. 534/980 cut-off events. For 101629/101629 co-relation queries the response was YES. Maximal size of possible extension queue 87. Compared 4869 event pairs, 70 based on Foata normal form. 2/980 useless extension candidates. Maximal degree in co-relation 7478. Up to 445 conditions per place. [2024-06-21 21:10:21,381 INFO L140 encePairwiseOnDemand]: 19/31 looper letters, 124 selfloop transitions, 91 changer transitions 0/217 dead transitions. [2024-06-21 21:10:21,382 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 227 places, 217 transitions, 2840 flow [2024-06-21 21:10:21,382 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 21:10:21,382 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 21:10:21,382 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 142 transitions. [2024-06-21 21:10:21,382 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45806451612903226 [2024-06-21 21:10:21,382 INFO L175 Difference]: Start difference. First operand has 218 places, 185 transitions, 2023 flow. Second operand 10 states and 142 transitions. [2024-06-21 21:10:21,383 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 227 places, 217 transitions, 2840 flow [2024-06-21 21:10:21,564 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 215 places, 217 transitions, 2690 flow, removed 7 selfloop flow, removed 12 redundant places. [2024-06-21 21:10:21,574 INFO L231 Difference]: Finished difference. Result has 216 places, 186 transitions, 2078 flow [2024-06-21 21:10:21,575 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1881, PETRI_DIFFERENCE_MINUEND_PLACES=206, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=185, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=90, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=95, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2078, PETRI_PLACES=216, PETRI_TRANSITIONS=186} [2024-06-21 21:10:21,575 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 186 predicate places. [2024-06-21 21:10:21,575 INFO L495 AbstractCegarLoop]: Abstraction has has 216 places, 186 transitions, 2078 flow [2024-06-21 21:10:21,575 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 7.363636363636363) internal successors, (81), 11 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:10:21,575 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:10:21,575 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:10:21,576 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71 [2024-06-21 21:10:21,579 INFO L420 AbstractCegarLoop]: === Iteration 73 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 21:10:21,579 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:10:21,579 INFO L85 PathProgramCache]: Analyzing trace with hash 2134422402, now seen corresponding path program 2 times [2024-06-21 21:10:21,580 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:10:21,580 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1106463817] [2024-06-21 21:10:21,580 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:10:21,580 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:10:21,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:10:22,276 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:10:22,277 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:10:22,277 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1106463817] [2024-06-21 21:10:22,277 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1106463817] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:10:22,277 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:10:22,277 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 21:10:22,277 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1149086966] [2024-06-21 21:10:22,277 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:10:22,278 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 21:10:22,278 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:10:22,278 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 21:10:22,278 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-06-21 21:10:22,348 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 21:10:22,348 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 216 places, 186 transitions, 2078 flow. Second operand has 11 states, 11 states have (on average 7.363636363636363) internal successors, (81), 11 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:10:22,348 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:10:22,348 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 21:10:22,348 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:10:22,704 INFO L124 PetriNetUnfolderBase]: 540/990 cut-off events. [2024-06-21 21:10:22,704 INFO L125 PetriNetUnfolderBase]: For 99577/99577 co-relation queries the response was YES. [2024-06-21 21:10:22,709 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7674 conditions, 990 events. 540/990 cut-off events. For 99577/99577 co-relation queries the response was YES. Maximal size of possible extension queue 88. Compared 4939 event pairs, 87 based on Foata normal form. 2/990 useless extension candidates. Maximal degree in co-relation 7576. Up to 637 conditions per place. [2024-06-21 21:10:22,723 INFO L140 encePairwiseOnDemand]: 19/31 looper letters, 122 selfloop transitions, 90 changer transitions 0/214 dead transitions. [2024-06-21 21:10:22,723 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 225 places, 214 transitions, 2760 flow [2024-06-21 21:10:22,723 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 21:10:22,723 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 21:10:22,724 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 137 transitions. [2024-06-21 21:10:22,724 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44193548387096776 [2024-06-21 21:10:22,724 INFO L175 Difference]: Start difference. First operand has 216 places, 186 transitions, 2078 flow. Second operand 10 states and 137 transitions. [2024-06-21 21:10:22,724 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 225 places, 214 transitions, 2760 flow [2024-06-21 21:10:22,905 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 216 places, 214 transitions, 2485 flow, removed 6 selfloop flow, removed 9 redundant places. [2024-06-21 21:10:22,908 INFO L231 Difference]: Finished difference. Result has 218 places, 190 transitions, 2098 flow [2024-06-21 21:10:22,908 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1803, PETRI_DIFFERENCE_MINUEND_PLACES=207, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=186, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=86, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=98, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2098, PETRI_PLACES=218, PETRI_TRANSITIONS=190} [2024-06-21 21:10:22,908 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 188 predicate places. [2024-06-21 21:10:22,909 INFO L495 AbstractCegarLoop]: Abstraction has has 218 places, 190 transitions, 2098 flow [2024-06-21 21:10:22,909 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 7.363636363636363) internal successors, (81), 11 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:10:22,909 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:10:22,909 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:10:22,909 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72 [2024-06-21 21:10:22,909 INFO L420 AbstractCegarLoop]: === Iteration 74 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 21:10:22,909 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:10:22,909 INFO L85 PathProgramCache]: Analyzing trace with hash -761607356, now seen corresponding path program 10 times [2024-06-21 21:10:22,910 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:10:22,910 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1091968228] [2024-06-21 21:10:22,910 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:10:22,910 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:10:22,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:10:23,721 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:10:23,721 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:10:23,721 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1091968228] [2024-06-21 21:10:23,721 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1091968228] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:10:23,721 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:10:23,721 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 21:10:23,721 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1440362691] [2024-06-21 21:10:23,722 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:10:23,722 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 21:10:23,722 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:10:23,722 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 21:10:23,722 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-06-21 21:10:23,815 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 21:10:23,815 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 218 places, 190 transitions, 2098 flow. Second operand has 11 states, 11 states have (on average 7.363636363636363) internal successors, (81), 11 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:10:23,815 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:10:23,815 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 21:10:23,815 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:10:24,115 INFO L124 PetriNetUnfolderBase]: 544/998 cut-off events. [2024-06-21 21:10:24,116 INFO L125 PetriNetUnfolderBase]: For 102798/102798 co-relation queries the response was YES. [2024-06-21 21:10:24,120 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7634 conditions, 998 events. 544/998 cut-off events. For 102798/102798 co-relation queries the response was YES. Maximal size of possible extension queue 89. Compared 4993 event pairs, 114 based on Foata normal form. 2/998 useless extension candidates. Maximal degree in co-relation 7536. Up to 831 conditions per place. [2024-06-21 21:10:24,123 INFO L140 encePairwiseOnDemand]: 20/31 looper letters, 137 selfloop transitions, 71 changer transitions 0/210 dead transitions. [2024-06-21 21:10:24,123 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 227 places, 210 transitions, 2574 flow [2024-06-21 21:10:24,123 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 21:10:24,123 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 21:10:24,124 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 127 transitions. [2024-06-21 21:10:24,124 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4096774193548387 [2024-06-21 21:10:24,124 INFO L175 Difference]: Start difference. First operand has 218 places, 190 transitions, 2098 flow. Second operand 10 states and 127 transitions. [2024-06-21 21:10:24,124 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 227 places, 210 transitions, 2574 flow [2024-06-21 21:10:24,297 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 220 places, 210 transitions, 2413 flow, removed 14 selfloop flow, removed 7 redundant places. [2024-06-21 21:10:24,299 INFO L231 Difference]: Finished difference. Result has 221 places, 191 transitions, 2093 flow [2024-06-21 21:10:24,300 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1937, PETRI_DIFFERENCE_MINUEND_PLACES=211, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=190, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=70, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=119, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2093, PETRI_PLACES=221, PETRI_TRANSITIONS=191} [2024-06-21 21:10:24,300 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 191 predicate places. [2024-06-21 21:10:24,300 INFO L495 AbstractCegarLoop]: Abstraction has has 221 places, 191 transitions, 2093 flow [2024-06-21 21:10:24,300 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 7.363636363636363) internal successors, (81), 11 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:10:24,300 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:10:24,300 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:10:24,301 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73 [2024-06-21 21:10:24,301 INFO L420 AbstractCegarLoop]: === Iteration 75 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 21:10:24,301 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:10:24,301 INFO L85 PathProgramCache]: Analyzing trace with hash -761612006, now seen corresponding path program 11 times [2024-06-21 21:10:24,301 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:10:24,301 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [503236928] [2024-06-21 21:10:24,301 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:10:24,301 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:10:24,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:10:25,084 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:10:25,085 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:10:25,085 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [503236928] [2024-06-21 21:10:25,085 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [503236928] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:10:25,085 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:10:25,085 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 21:10:25,085 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1432101031] [2024-06-21 21:10:25,085 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:10:25,086 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 21:10:25,086 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:10:25,086 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 21:10:25,086 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-06-21 21:10:25,178 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 21:10:25,178 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 221 places, 191 transitions, 2093 flow. Second operand has 11 states, 11 states have (on average 7.363636363636363) internal successors, (81), 11 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:10:25,178 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:10:25,178 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 21:10:25,178 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:10:25,595 INFO L124 PetriNetUnfolderBase]: 606/1124 cut-off events. [2024-06-21 21:10:25,595 INFO L125 PetriNetUnfolderBase]: For 152679/152679 co-relation queries the response was YES. [2024-06-21 21:10:25,601 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9407 conditions, 1124 events. 606/1124 cut-off events. For 152679/152679 co-relation queries the response was YES. Maximal size of possible extension queue 91. Compared 5853 event pairs, 128 based on Foata normal form. 2/1124 useless extension candidates. Maximal degree in co-relation 9308. Up to 689 conditions per place. [2024-06-21 21:10:25,604 INFO L140 encePairwiseOnDemand]: 19/31 looper letters, 132 selfloop transitions, 92 changer transitions 0/226 dead transitions. [2024-06-21 21:10:25,604 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 231 places, 226 transitions, 2949 flow [2024-06-21 21:10:25,605 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 21:10:25,605 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 21:10:25,605 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 156 transitions. [2024-06-21 21:10:25,605 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4574780058651026 [2024-06-21 21:10:25,606 INFO L175 Difference]: Start difference. First operand has 221 places, 191 transitions, 2093 flow. Second operand 11 states and 156 transitions. [2024-06-21 21:10:25,606 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 231 places, 226 transitions, 2949 flow [2024-06-21 21:10:25,851 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 223 places, 226 transitions, 2805 flow, removed 2 selfloop flow, removed 8 redundant places. [2024-06-21 21:10:25,854 INFO L231 Difference]: Finished difference. Result has 224 places, 193 transitions, 2159 flow [2024-06-21 21:10:25,870 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1949, PETRI_DIFFERENCE_MINUEND_PLACES=213, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=191, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=91, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=100, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=2159, PETRI_PLACES=224, PETRI_TRANSITIONS=193} [2024-06-21 21:10:25,870 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 194 predicate places. [2024-06-21 21:10:25,870 INFO L495 AbstractCegarLoop]: Abstraction has has 224 places, 193 transitions, 2159 flow [2024-06-21 21:10:25,870 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 7.363636363636363) internal successors, (81), 11 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:10:25,870 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:10:25,870 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:10:25,871 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74 [2024-06-21 21:10:25,871 INFO L420 AbstractCegarLoop]: === Iteration 76 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 21:10:25,871 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:10:25,871 INFO L85 PathProgramCache]: Analyzing trace with hash -291226396, now seen corresponding path program 3 times [2024-06-21 21:10:25,871 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:10:25,871 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [538988550] [2024-06-21 21:10:25,871 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:10:25,871 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:10:25,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:10:26,744 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:10:26,745 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:10:26,745 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [538988550] [2024-06-21 21:10:26,745 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [538988550] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:10:26,745 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:10:26,745 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 21:10:26,745 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2083751064] [2024-06-21 21:10:26,745 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:10:26,746 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 21:10:26,746 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:10:26,746 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 21:10:26,746 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2024-06-21 21:10:26,825 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 21:10:26,825 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 224 places, 193 transitions, 2159 flow. Second operand has 11 states, 11 states have (on average 7.363636363636363) internal successors, (81), 11 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:10:26,825 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:10:26,825 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 21:10:26,825 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:10:27,240 INFO L124 PetriNetUnfolderBase]: 612/1134 cut-off events. [2024-06-21 21:10:27,241 INFO L125 PetriNetUnfolderBase]: For 157543/157543 co-relation queries the response was YES. [2024-06-21 21:10:27,246 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9628 conditions, 1134 events. 612/1134 cut-off events. For 157543/157543 co-relation queries the response was YES. Maximal size of possible extension queue 92. Compared 5946 event pairs, 139 based on Foata normal form. 2/1134 useless extension candidates. Maximal degree in co-relation 9528. Up to 928 conditions per place. [2024-06-21 21:10:27,249 INFO L140 encePairwiseOnDemand]: 19/31 looper letters, 153 selfloop transitions, 61 changer transitions 0/216 dead transitions. [2024-06-21 21:10:27,249 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 234 places, 216 transitions, 2677 flow [2024-06-21 21:10:27,250 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 21:10:27,250 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 21:10:27,250 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 138 transitions. [2024-06-21 21:10:27,250 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4046920821114369 [2024-06-21 21:10:27,250 INFO L175 Difference]: Start difference. First operand has 224 places, 193 transitions, 2159 flow. Second operand 11 states and 138 transitions. [2024-06-21 21:10:27,250 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 234 places, 216 transitions, 2677 flow [2024-06-21 21:10:27,510 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 227 places, 216 transitions, 2532 flow, removed 3 selfloop flow, removed 7 redundant places. [2024-06-21 21:10:27,512 INFO L231 Difference]: Finished difference. Result has 228 places, 195 transitions, 2183 flow [2024-06-21 21:10:27,513 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=2014, PETRI_DIFFERENCE_MINUEND_PLACES=217, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=193, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=59, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=132, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=2183, PETRI_PLACES=228, PETRI_TRANSITIONS=195} [2024-06-21 21:10:27,513 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 198 predicate places. [2024-06-21 21:10:27,513 INFO L495 AbstractCegarLoop]: Abstraction has has 228 places, 195 transitions, 2183 flow [2024-06-21 21:10:27,513 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 7.363636363636363) internal successors, (81), 11 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:10:27,513 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:10:27,513 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:10:27,513 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75 [2024-06-21 21:10:27,514 INFO L420 AbstractCegarLoop]: === Iteration 77 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 21:10:27,514 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:10:27,514 INFO L85 PathProgramCache]: Analyzing trace with hash -756965726, now seen corresponding path program 12 times [2024-06-21 21:10:27,514 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:10:27,514 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [33027720] [2024-06-21 21:10:27,514 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:10:27,514 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:10:27,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:10:28,446 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:10:28,446 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:10:28,446 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [33027720] [2024-06-21 21:10:28,446 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [33027720] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:10:28,446 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:10:28,447 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 21:10:28,447 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1494333540] [2024-06-21 21:10:28,447 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:10:28,447 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 21:10:28,447 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:10:28,448 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 21:10:28,448 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2024-06-21 21:10:28,573 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 21:10:28,573 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 228 places, 195 transitions, 2183 flow. Second operand has 11 states, 11 states have (on average 7.363636363636363) internal successors, (81), 11 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:10:28,573 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:10:28,573 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 21:10:28,573 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:10:28,913 INFO L124 PetriNetUnfolderBase]: 616/1142 cut-off events. [2024-06-21 21:10:28,913 INFO L125 PetriNetUnfolderBase]: For 161410/161410 co-relation queries the response was YES. [2024-06-21 21:10:28,918 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9767 conditions, 1142 events. 616/1142 cut-off events. For 161410/161410 co-relation queries the response was YES. Maximal size of possible extension queue 93. Compared 5986 event pairs, 153 based on Foata normal form. 2/1142 useless extension candidates. Maximal degree in co-relation 9665. Up to 1026 conditions per place. [2024-06-21 21:10:28,921 INFO L140 encePairwiseOnDemand]: 20/31 looper letters, 163 selfloop transitions, 47 changer transitions 0/212 dead transitions. [2024-06-21 21:10:28,921 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 237 places, 212 transitions, 2657 flow [2024-06-21 21:10:28,922 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 21:10:28,922 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 21:10:28,922 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 121 transitions. [2024-06-21 21:10:28,922 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3903225806451613 [2024-06-21 21:10:28,922 INFO L175 Difference]: Start difference. First operand has 228 places, 195 transitions, 2183 flow. Second operand 10 states and 121 transitions. [2024-06-21 21:10:28,922 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 237 places, 212 transitions, 2657 flow [2024-06-21 21:10:29,200 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 229 places, 212 transitions, 2515 flow, removed 14 selfloop flow, removed 8 redundant places. [2024-06-21 21:10:29,202 INFO L231 Difference]: Finished difference. Result has 230 places, 196 transitions, 2153 flow [2024-06-21 21:10:29,203 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=2041, PETRI_DIFFERENCE_MINUEND_PLACES=220, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=195, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=148, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2153, PETRI_PLACES=230, PETRI_TRANSITIONS=196} [2024-06-21 21:10:29,203 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 200 predicate places. [2024-06-21 21:10:29,203 INFO L495 AbstractCegarLoop]: Abstraction has has 230 places, 196 transitions, 2153 flow [2024-06-21 21:10:29,203 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 7.363636363636363) internal successors, (81), 11 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:10:29,203 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:10:29,203 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:10:29,203 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76 [2024-06-21 21:10:29,204 INFO L420 AbstractCegarLoop]: === Iteration 78 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 21:10:29,204 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:10:29,204 INFO L85 PathProgramCache]: Analyzing trace with hash -291399562, now seen corresponding path program 13 times [2024-06-21 21:10:29,204 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:10:29,204 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1067662022] [2024-06-21 21:10:29,204 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:10:29,204 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:10:29,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:10:29,963 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:10:29,964 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:10:29,964 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1067662022] [2024-06-21 21:10:29,964 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1067662022] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:10:29,964 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:10:29,964 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 21:10:29,964 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1998086029] [2024-06-21 21:10:29,964 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:10:29,965 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 21:10:29,965 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:10:29,966 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 21:10:29,966 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2024-06-21 21:10:30,052 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 21:10:30,053 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 230 places, 196 transitions, 2153 flow. Second operand has 11 states, 11 states have (on average 7.363636363636363) internal successors, (81), 11 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:10:30,053 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:10:30,053 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 21:10:30,053 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:10:30,511 INFO L124 PetriNetUnfolderBase]: 590/1096 cut-off events. [2024-06-21 21:10:30,511 INFO L125 PetriNetUnfolderBase]: For 160809/160809 co-relation queries the response was YES. [2024-06-21 21:10:30,516 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8170 conditions, 1096 events. 590/1096 cut-off events. For 160809/160809 co-relation queries the response was YES. Maximal size of possible extension queue 93. Compared 5722 event pairs, 115 based on Foata normal form. 20/1114 useless extension candidates. Maximal degree in co-relation 8067. Up to 806 conditions per place. [2024-06-21 21:10:30,519 INFO L140 encePairwiseOnDemand]: 19/31 looper letters, 148 selfloop transitions, 60 changer transitions 12/222 dead transitions. [2024-06-21 21:10:30,520 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 240 places, 222 transitions, 2687 flow [2024-06-21 21:10:30,520 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 21:10:30,520 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 21:10:30,520 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 143 transitions. [2024-06-21 21:10:30,521 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41935483870967744 [2024-06-21 21:10:30,521 INFO L175 Difference]: Start difference. First operand has 230 places, 196 transitions, 2153 flow. Second operand 11 states and 143 transitions. [2024-06-21 21:10:30,521 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 240 places, 222 transitions, 2687 flow [2024-06-21 21:10:30,783 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 232 places, 222 transitions, 2587 flow, removed 4 selfloop flow, removed 8 redundant places. [2024-06-21 21:10:30,785 INFO L231 Difference]: Finished difference. Result has 233 places, 191 transitions, 2120 flow [2024-06-21 21:10:30,785 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=2053, PETRI_DIFFERENCE_MINUEND_PLACES=222, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=196, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=60, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=136, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=2120, PETRI_PLACES=233, PETRI_TRANSITIONS=191} [2024-06-21 21:10:30,786 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 203 predicate places. [2024-06-21 21:10:30,786 INFO L495 AbstractCegarLoop]: Abstraction has has 233 places, 191 transitions, 2120 flow [2024-06-21 21:10:30,786 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 7.363636363636363) internal successors, (81), 11 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:10:30,786 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:10:30,786 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:10:30,786 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77 [2024-06-21 21:10:30,786 INFO L420 AbstractCegarLoop]: === Iteration 79 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 21:10:30,787 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:10:30,787 INFO L85 PathProgramCache]: Analyzing trace with hash -291399376, now seen corresponding path program 4 times [2024-06-21 21:10:30,787 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:10:30,787 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [302792853] [2024-06-21 21:10:30,787 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:10:30,787 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:10:30,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:10:31,526 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:10:31,526 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:10:31,526 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [302792853] [2024-06-21 21:10:31,527 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [302792853] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:10:31,527 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:10:31,527 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 21:10:31,527 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [875297483] [2024-06-21 21:10:31,527 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:10:31,527 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 21:10:31,527 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:10:31,527 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 21:10:31,527 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-21 21:10:31,645 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 21:10:31,645 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 233 places, 191 transitions, 2120 flow. Second operand has 11 states, 11 states have (on average 7.363636363636363) internal successors, (81), 11 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:10:31,645 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:10:31,646 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 21:10:31,646 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:10:32,056 INFO L124 PetriNetUnfolderBase]: 554/1020 cut-off events. [2024-06-21 21:10:32,056 INFO L125 PetriNetUnfolderBase]: For 118361/118361 co-relation queries the response was YES. [2024-06-21 21:10:32,061 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7977 conditions, 1020 events. 554/1020 cut-off events. For 118361/118361 co-relation queries the response was YES. Maximal size of possible extension queue 91. Compared 5172 event pairs, 89 based on Foata normal form. 2/1020 useless extension candidates. Maximal degree in co-relation 7873. Up to 794 conditions per place. [2024-06-21 21:10:32,064 INFO L140 encePairwiseOnDemand]: 19/31 looper letters, 146 selfloop transitions, 66 changer transitions 0/214 dead transitions. [2024-06-21 21:10:32,065 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 242 places, 214 transitions, 2638 flow [2024-06-21 21:10:32,065 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 21:10:32,065 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 21:10:32,065 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 139 transitions. [2024-06-21 21:10:32,066 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40762463343108507 [2024-06-21 21:10:32,066 INFO L175 Difference]: Start difference. First operand has 233 places, 191 transitions, 2120 flow. Second operand 11 states and 139 transitions. [2024-06-21 21:10:32,066 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 242 places, 214 transitions, 2638 flow [2024-06-21 21:10:32,262 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 231 places, 214 transitions, 2504 flow, removed 3 selfloop flow, removed 11 redundant places. [2024-06-21 21:10:32,277 INFO L231 Difference]: Finished difference. Result has 232 places, 193 transitions, 2169 flow [2024-06-21 21:10:32,278 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1986, PETRI_DIFFERENCE_MINUEND_PLACES=221, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=191, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=64, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=125, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=2169, PETRI_PLACES=232, PETRI_TRANSITIONS=193} [2024-06-21 21:10:32,278 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 202 predicate places. [2024-06-21 21:10:32,278 INFO L495 AbstractCegarLoop]: Abstraction has has 232 places, 193 transitions, 2169 flow [2024-06-21 21:10:32,278 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 7.363636363636363) internal successors, (81), 11 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:10:32,278 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:10:32,278 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:10:32,279 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78 [2024-06-21 21:10:32,279 INFO L420 AbstractCegarLoop]: === Iteration 80 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 21:10:32,279 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:10:32,279 INFO L85 PathProgramCache]: Analyzing trace with hash -125170432, now seen corresponding path program 14 times [2024-06-21 21:10:32,279 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:10:32,279 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [918646326] [2024-06-21 21:10:32,279 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:10:32,279 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:10:32,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:10:33,142 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:10:33,143 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:10:33,143 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [918646326] [2024-06-21 21:10:33,143 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [918646326] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:10:33,143 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:10:33,143 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 21:10:33,143 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1596626627] [2024-06-21 21:10:33,143 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:10:33,144 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 21:10:33,144 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:10:33,144 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 21:10:33,144 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2024-06-21 21:10:33,211 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 21:10:33,211 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 232 places, 193 transitions, 2169 flow. Second operand has 11 states, 11 states have (on average 7.363636363636363) internal successors, (81), 11 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:10:33,211 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:10:33,211 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 21:10:33,211 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:10:33,558 INFO L124 PetriNetUnfolderBase]: 616/1146 cut-off events. [2024-06-21 21:10:33,559 INFO L125 PetriNetUnfolderBase]: For 170798/170798 co-relation queries the response was YES. [2024-06-21 21:10:33,564 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9879 conditions, 1146 events. 616/1146 cut-off events. For 170798/170798 co-relation queries the response was YES. Maximal size of possible extension queue 93. Compared 5977 event pairs, 136 based on Foata normal form. 2/1146 useless extension candidates. Maximal degree in co-relation 9774. Up to 781 conditions per place. [2024-06-21 21:10:33,567 INFO L140 encePairwiseOnDemand]: 20/31 looper letters, 160 selfloop transitions, 58 changer transitions 0/220 dead transitions. [2024-06-21 21:10:33,567 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 241 places, 220 transitions, 3009 flow [2024-06-21 21:10:33,568 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 21:10:33,568 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 21:10:33,568 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 135 transitions. [2024-06-21 21:10:33,568 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43548387096774194 [2024-06-21 21:10:33,568 INFO L175 Difference]: Start difference. First operand has 232 places, 193 transitions, 2169 flow. Second operand 10 states and 135 transitions. [2024-06-21 21:10:33,568 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 241 places, 220 transitions, 3009 flow [2024-06-21 21:10:33,866 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 231 places, 220 transitions, 2840 flow, removed 17 selfloop flow, removed 10 redundant places. [2024-06-21 21:10:33,869 INFO L231 Difference]: Finished difference. Result has 232 places, 195 transitions, 2146 flow [2024-06-21 21:10:33,869 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=2000, PETRI_DIFFERENCE_MINUEND_PLACES=222, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=193, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=57, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=136, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2146, PETRI_PLACES=232, PETRI_TRANSITIONS=195} [2024-06-21 21:10:33,869 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 202 predicate places. [2024-06-21 21:10:33,869 INFO L495 AbstractCegarLoop]: Abstraction has has 232 places, 195 transitions, 2146 flow [2024-06-21 21:10:33,869 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 7.363636363636363) internal successors, (81), 11 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:10:33,869 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:10:33,869 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:10:33,870 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79 [2024-06-21 21:10:33,870 INFO L420 AbstractCegarLoop]: === Iteration 81 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 21:10:33,870 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:10:33,870 INFO L85 PathProgramCache]: Analyzing trace with hash -124992616, now seen corresponding path program 5 times [2024-06-21 21:10:33,870 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:10:33,870 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [900936730] [2024-06-21 21:10:33,870 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:10:33,871 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:10:33,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:10:34,635 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:10:34,635 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:10:34,635 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [900936730] [2024-06-21 21:10:34,636 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [900936730] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:10:34,636 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:10:34,636 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 21:10:34,636 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1514953540] [2024-06-21 21:10:34,636 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:10:34,636 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 21:10:34,636 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:10:34,637 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 21:10:34,637 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2024-06-21 21:10:34,713 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 21:10:34,714 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 232 places, 195 transitions, 2146 flow. Second operand has 11 states, 11 states have (on average 7.363636363636363) internal successors, (81), 11 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:10:34,714 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:10:34,714 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 21:10:34,714 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:10:35,138 INFO L124 PetriNetUnfolderBase]: 622/1156 cut-off events. [2024-06-21 21:10:35,139 INFO L125 PetriNetUnfolderBase]: For 175310/175310 co-relation queries the response was YES. [2024-06-21 21:10:35,144 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9965 conditions, 1156 events. 622/1156 cut-off events. For 175310/175310 co-relation queries the response was YES. Maximal size of possible extension queue 94. Compared 6084 event pairs, 148 based on Foata normal form. 2/1156 useless extension candidates. Maximal degree in co-relation 9860. Up to 956 conditions per place. [2024-06-21 21:10:35,148 INFO L140 encePairwiseOnDemand]: 20/31 looper letters, 162 selfloop transitions, 52 changer transitions 0/216 dead transitions. [2024-06-21 21:10:35,148 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 242 places, 216 transitions, 2664 flow [2024-06-21 21:10:35,148 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 21:10:35,148 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 21:10:35,148 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 137 transitions. [2024-06-21 21:10:35,149 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40175953079178883 [2024-06-21 21:10:35,149 INFO L175 Difference]: Start difference. First operand has 232 places, 195 transitions, 2146 flow. Second operand 11 states and 137 transitions. [2024-06-21 21:10:35,149 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 242 places, 216 transitions, 2664 flow [2024-06-21 21:10:35,429 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 236 places, 216 transitions, 2579 flow, removed 5 selfloop flow, removed 6 redundant places. [2024-06-21 21:10:35,431 INFO L231 Difference]: Finished difference. Result has 237 places, 197 transitions, 2220 flow [2024-06-21 21:10:35,431 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=2061, PETRI_DIFFERENCE_MINUEND_PLACES=226, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=195, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=50, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=143, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=2220, PETRI_PLACES=237, PETRI_TRANSITIONS=197} [2024-06-21 21:10:35,432 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 207 predicate places. [2024-06-21 21:10:35,432 INFO L495 AbstractCegarLoop]: Abstraction has has 237 places, 197 transitions, 2220 flow [2024-06-21 21:10:35,432 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 7.363636363636363) internal successors, (81), 11 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:10:35,432 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:10:35,432 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:10:35,432 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80 [2024-06-21 21:10:35,432 INFO L420 AbstractCegarLoop]: === Iteration 82 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 21:10:35,433 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:10:35,433 INFO L85 PathProgramCache]: Analyzing trace with hash -118736506, now seen corresponding path program 6 times [2024-06-21 21:10:35,433 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:10:35,433 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1280053915] [2024-06-21 21:10:35,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:10:35,433 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:10:35,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:10:36,284 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:10:36,284 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:10:36,284 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1280053915] [2024-06-21 21:10:36,284 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1280053915] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:10:36,284 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:10:36,284 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 21:10:36,285 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2044349187] [2024-06-21 21:10:36,285 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:10:36,285 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 21:10:36,285 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:10:36,285 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 21:10:36,285 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2024-06-21 21:10:36,366 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 21:10:36,366 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 237 places, 197 transitions, 2220 flow. Second operand has 11 states, 11 states have (on average 7.363636363636363) internal successors, (81), 11 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:10:36,367 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:10:36,367 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 21:10:36,367 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:10:36,808 INFO L124 PetriNetUnfolderBase]: 634/1176 cut-off events. [2024-06-21 21:10:36,809 INFO L125 PetriNetUnfolderBase]: For 180431/180431 co-relation queries the response was YES. [2024-06-21 21:10:36,814 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10257 conditions, 1176 events. 634/1176 cut-off events. For 180431/180431 co-relation queries the response was YES. Maximal size of possible extension queue 98. Compared 6186 event pairs, 142 based on Foata normal form. 2/1176 useless extension candidates. Maximal degree in co-relation 10150. Up to 965 conditions per place. [2024-06-21 21:10:36,817 INFO L140 encePairwiseOnDemand]: 20/31 looper letters, 164 selfloop transitions, 55 changer transitions 0/221 dead transitions. [2024-06-21 21:10:36,817 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 247 places, 221 transitions, 2931 flow [2024-06-21 21:10:36,817 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 21:10:36,818 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 21:10:36,818 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 137 transitions. [2024-06-21 21:10:36,818 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40175953079178883 [2024-06-21 21:10:36,818 INFO L175 Difference]: Start difference. First operand has 237 places, 197 transitions, 2220 flow. Second operand 11 states and 137 transitions. [2024-06-21 21:10:36,818 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 247 places, 221 transitions, 2931 flow [2024-06-21 21:10:37,169 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 239 places, 221 transitions, 2795 flow, removed 18 selfloop flow, removed 8 redundant places. [2024-06-21 21:10:37,171 INFO L231 Difference]: Finished difference. Result has 240 places, 201 transitions, 2280 flow [2024-06-21 21:10:37,171 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=2088, PETRI_DIFFERENCE_MINUEND_PLACES=229, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=197, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=51, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=144, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=2280, PETRI_PLACES=240, PETRI_TRANSITIONS=201} [2024-06-21 21:10:37,172 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 210 predicate places. [2024-06-21 21:10:37,172 INFO L495 AbstractCegarLoop]: Abstraction has has 240 places, 201 transitions, 2280 flow [2024-06-21 21:10:37,172 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 7.363636363636363) internal successors, (81), 11 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:10:37,172 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:10:37,172 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:10:37,172 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81 [2024-06-21 21:10:37,172 INFO L420 AbstractCegarLoop]: === Iteration 83 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 21:10:37,173 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:10:37,173 INFO L85 PathProgramCache]: Analyzing trace with hash -118736692, now seen corresponding path program 15 times [2024-06-21 21:10:37,173 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:10:37,173 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [72914367] [2024-06-21 21:10:37,173 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:10:37,173 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:10:37,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:10:38,002 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:10:38,002 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:10:38,002 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [72914367] [2024-06-21 21:10:38,002 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [72914367] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:10:38,003 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:10:38,003 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 21:10:38,003 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [835695449] [2024-06-21 21:10:38,003 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:10:38,003 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 21:10:38,003 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:10:38,003 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 21:10:38,004 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2024-06-21 21:10:38,108 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 21:10:38,108 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 240 places, 201 transitions, 2280 flow. Second operand has 11 states, 11 states have (on average 7.363636363636363) internal successors, (81), 11 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:10:38,108 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:10:38,108 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 21:10:38,108 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:10:38,487 INFO L124 PetriNetUnfolderBase]: 662/1242 cut-off events. [2024-06-21 21:10:38,488 INFO L125 PetriNetUnfolderBase]: For 236013/236013 co-relation queries the response was YES. [2024-06-21 21:10:38,494 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10341 conditions, 1242 events. 662/1242 cut-off events. For 236013/236013 co-relation queries the response was YES. Maximal size of possible extension queue 100. Compared 6732 event pairs, 154 based on Foata normal form. 22/1262 useless extension candidates. Maximal degree in co-relation 10233. Up to 960 conditions per place. [2024-06-21 21:10:38,498 INFO L140 encePairwiseOnDemand]: 20/31 looper letters, 161 selfloop transitions, 45 changer transitions 16/224 dead transitions. [2024-06-21 21:10:38,498 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 249 places, 224 transitions, 2818 flow [2024-06-21 21:10:38,498 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 21:10:38,498 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 21:10:38,498 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 131 transitions. [2024-06-21 21:10:38,499 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42258064516129035 [2024-06-21 21:10:38,499 INFO L175 Difference]: Start difference. First operand has 240 places, 201 transitions, 2280 flow. Second operand 10 states and 131 transitions. [2024-06-21 21:10:38,499 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 249 places, 224 transitions, 2818 flow [2024-06-21 21:10:38,851 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 241 places, 224 transitions, 2656 flow, removed 27 selfloop flow, removed 8 redundant places. [2024-06-21 21:10:38,853 INFO L231 Difference]: Finished difference. Result has 243 places, 193 transitions, 2134 flow [2024-06-21 21:10:38,854 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=2118, PETRI_DIFFERENCE_MINUEND_PLACES=232, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=201, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=44, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=156, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2134, PETRI_PLACES=243, PETRI_TRANSITIONS=193} [2024-06-21 21:10:38,854 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 213 predicate places. [2024-06-21 21:10:38,854 INFO L495 AbstractCegarLoop]: Abstraction has has 243 places, 193 transitions, 2134 flow [2024-06-21 21:10:38,854 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 7.363636363636363) internal successors, (81), 11 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:10:38,854 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:10:38,854 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:10:38,855 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82 [2024-06-21 21:10:38,855 INFO L420 AbstractCegarLoop]: === Iteration 84 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 21:10:38,855 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:10:38,855 INFO L85 PathProgramCache]: Analyzing trace with hash -125165782, now seen corresponding path program 16 times [2024-06-21 21:10:38,855 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:10:38,855 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [991426705] [2024-06-21 21:10:38,855 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:10:38,855 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:10:38,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:10:39,676 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:10:39,676 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:10:39,677 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [991426705] [2024-06-21 21:10:39,677 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [991426705] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:10:39,677 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:10:39,677 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 21:10:39,677 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1795176163] [2024-06-21 21:10:39,677 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:10:39,677 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 21:10:39,677 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:10:39,678 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 21:10:39,678 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2024-06-21 21:10:39,745 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 21:10:39,745 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 243 places, 193 transitions, 2134 flow. Second operand has 11 states, 11 states have (on average 7.363636363636363) internal successors, (81), 11 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:10:39,745 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:10:39,745 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 21:10:39,745 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:10:40,123 INFO L124 PetriNetUnfolderBase]: 580/1092 cut-off events. [2024-06-21 21:10:40,123 INFO L125 PetriNetUnfolderBase]: For 182389/182389 co-relation queries the response was YES. [2024-06-21 21:10:40,129 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8205 conditions, 1092 events. 580/1092 cut-off events. For 182389/182389 co-relation queries the response was YES. Maximal size of possible extension queue 94. Compared 5739 event pairs, 118 based on Foata normal form. 20/1110 useless extension candidates. Maximal degree in co-relation 8095. Up to 823 conditions per place. [2024-06-21 21:10:40,131 INFO L140 encePairwiseOnDemand]: 20/31 looper letters, 154 selfloop transitions, 48 changer transitions 12/216 dead transitions. [2024-06-21 21:10:40,131 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 252 places, 216 transitions, 2646 flow [2024-06-21 21:10:40,132 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 21:10:40,132 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 21:10:40,132 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 140 transitions. [2024-06-21 21:10:40,132 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41055718475073316 [2024-06-21 21:10:40,132 INFO L175 Difference]: Start difference. First operand has 243 places, 193 transitions, 2134 flow. Second operand 11 states and 140 transitions. [2024-06-21 21:10:40,132 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 252 places, 216 transitions, 2646 flow [2024-06-21 21:10:40,353 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 241 places, 216 transitions, 2537 flow, removed 6 selfloop flow, removed 11 redundant places. [2024-06-21 21:10:40,355 INFO L231 Difference]: Finished difference. Result has 242 places, 188 transitions, 2061 flow [2024-06-21 21:10:40,356 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=2025, PETRI_DIFFERENCE_MINUEND_PLACES=231, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=193, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=48, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=145, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=2061, PETRI_PLACES=242, PETRI_TRANSITIONS=188} [2024-06-21 21:10:40,356 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 212 predicate places. [2024-06-21 21:10:40,356 INFO L495 AbstractCegarLoop]: Abstraction has has 242 places, 188 transitions, 2061 flow [2024-06-21 21:10:40,356 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 7.363636363636363) internal successors, (81), 11 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:10:40,356 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:10:40,356 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:10:40,357 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83 [2024-06-21 21:10:40,357 INFO L420 AbstractCegarLoop]: === Iteration 85 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 21:10:40,357 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:10:40,358 INFO L85 PathProgramCache]: Analyzing trace with hash -590904740, now seen corresponding path program 7 times [2024-06-21 21:10:40,358 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:10:40,358 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [986879957] [2024-06-21 21:10:40,358 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:10:40,358 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:10:40,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:10:41,160 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:10:41,160 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:10:41,160 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [986879957] [2024-06-21 21:10:41,160 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [986879957] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:10:41,160 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:10:41,160 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 21:10:41,161 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1905494165] [2024-06-21 21:10:41,161 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:10:41,161 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 21:10:41,161 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:10:41,161 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 21:10:41,161 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-06-21 21:10:41,221 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 21:10:41,221 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 242 places, 188 transitions, 2061 flow. Second operand has 11 states, 11 states have (on average 7.363636363636363) internal successors, (81), 11 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:10:41,221 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:10:41,221 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 21:10:41,221 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:10:41,535 INFO L124 PetriNetUnfolderBase]: 544/1016 cut-off events. [2024-06-21 21:10:41,535 INFO L125 PetriNetUnfolderBase]: For 128531/128531 co-relation queries the response was YES. [2024-06-21 21:10:41,540 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7911 conditions, 1016 events. 544/1016 cut-off events. For 128531/128531 co-relation queries the response was YES. Maximal size of possible extension queue 91. Compared 5231 event pairs, 96 based on Foata normal form. 2/1016 useless extension candidates. Maximal degree in co-relation 7801. Up to 801 conditions per place. [2024-06-21 21:10:41,542 INFO L140 encePairwiseOnDemand]: 20/31 looper letters, 151 selfloop transitions, 54 changer transitions 0/207 dead transitions. [2024-06-21 21:10:41,542 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 250 places, 207 transitions, 2565 flow [2024-06-21 21:10:41,543 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 21:10:41,543 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 21:10:41,565 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 127 transitions. [2024-06-21 21:10:41,565 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4096774193548387 [2024-06-21 21:10:41,566 INFO L175 Difference]: Start difference. First operand has 242 places, 188 transitions, 2061 flow. Second operand 10 states and 127 transitions. [2024-06-21 21:10:41,566 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 250 places, 207 transitions, 2565 flow [2024-06-21 21:10:41,806 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 238 places, 207 transitions, 2424 flow, removed 2 selfloop flow, removed 12 redundant places. [2024-06-21 21:10:41,808 INFO L231 Difference]: Finished difference. Result has 239 places, 190 transitions, 2091 flow [2024-06-21 21:10:41,808 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1920, PETRI_DIFFERENCE_MINUEND_PLACES=229, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=188, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=52, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=134, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2091, PETRI_PLACES=239, PETRI_TRANSITIONS=190} [2024-06-21 21:10:41,809 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 209 predicate places. [2024-06-21 21:10:41,809 INFO L495 AbstractCegarLoop]: Abstraction has has 239 places, 190 transitions, 2091 flow [2024-06-21 21:10:41,809 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 7.363636363636363) internal successors, (81), 11 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:10:41,809 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:10:41,810 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:10:41,810 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84 [2024-06-21 21:10:41,810 INFO L420 AbstractCegarLoop]: === Iteration 86 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 21:10:41,810 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:10:41,811 INFO L85 PathProgramCache]: Analyzing trace with hash -217841374, now seen corresponding path program 1 times [2024-06-21 21:10:41,811 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:10:41,811 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1920589239] [2024-06-21 21:10:41,811 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:10:41,811 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:10:41,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:10:42,873 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:10:42,873 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:10:42,873 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1920589239] [2024-06-21 21:10:42,873 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1920589239] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:10:42,873 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:10:42,873 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-21 21:10:42,873 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [681557834] [2024-06-21 21:10:42,874 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:10:42,874 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-21 21:10:42,874 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:10:42,876 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-21 21:10:42,876 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2024-06-21 21:10:42,965 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 21:10:42,965 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 239 places, 190 transitions, 2091 flow. Second operand has 12 states, 12 states have (on average 7.25) internal successors, (87), 12 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) [2024-06-21 21:10:42,965 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:10:42,966 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 21:10:42,966 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:10:43,213 INFO L124 PetriNetUnfolderBase]: 548/1024 cut-off events. [2024-06-21 21:10:43,214 INFO L125 PetriNetUnfolderBase]: For 132015/132015 co-relation queries the response was YES. [2024-06-21 21:10:43,220 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7992 conditions, 1024 events. 548/1024 cut-off events. For 132015/132015 co-relation queries the response was YES. Maximal size of possible extension queue 92. Compared 5266 event pairs, 105 based on Foata normal form. 2/1024 useless extension candidates. Maximal degree in co-relation 7881. Up to 965 conditions per place. [2024-06-21 21:10:43,223 INFO L140 encePairwiseOnDemand]: 21/31 looper letters, 177 selfloop transitions, 24 changer transitions 0/203 dead transitions. [2024-06-21 21:10:43,223 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 248 places, 203 transitions, 2535 flow [2024-06-21 21:10:43,224 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 21:10:43,224 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 21:10:43,225 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 111 transitions. [2024-06-21 21:10:43,225 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3580645161290323 [2024-06-21 21:10:43,225 INFO L175 Difference]: Start difference. First operand has 239 places, 190 transitions, 2091 flow. Second operand 10 states and 111 transitions. [2024-06-21 21:10:43,225 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 248 places, 203 transitions, 2535 flow [2024-06-21 21:10:43,501 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 239 places, 203 transitions, 2378 flow, removed 23 selfloop flow, removed 9 redundant places. [2024-06-21 21:10:43,504 INFO L231 Difference]: Finished difference. Result has 240 places, 191 transitions, 2004 flow [2024-06-21 21:10:43,504 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1934, PETRI_DIFFERENCE_MINUEND_PLACES=230, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=190, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=166, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2004, PETRI_PLACES=240, PETRI_TRANSITIONS=191} [2024-06-21 21:10:43,504 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 210 predicate places. [2024-06-21 21:10:43,505 INFO L495 AbstractCegarLoop]: Abstraction has has 240 places, 191 transitions, 2004 flow [2024-06-21 21:10:43,505 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 7.25) internal successors, (87), 12 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) [2024-06-21 21:10:43,505 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:10:43,505 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:10:43,505 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85 [2024-06-21 21:10:43,505 INFO L420 AbstractCegarLoop]: === Iteration 87 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 21:10:43,505 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:10:43,506 INFO L85 PathProgramCache]: Analyzing trace with hash 1628031274, now seen corresponding path program 2 times [2024-06-21 21:10:43,506 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:10:43,506 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [950181381] [2024-06-21 21:10:43,506 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:10:43,506 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:10:43,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:10:44,542 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:10:44,543 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:10:44,543 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [950181381] [2024-06-21 21:10:44,543 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [950181381] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:10:44,543 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:10:44,543 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-21 21:10:44,543 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1631775660] [2024-06-21 21:10:44,543 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:10:44,544 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-21 21:10:44,544 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:10:44,544 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-21 21:10:44,544 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2024-06-21 21:10:44,665 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 21:10:44,665 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 240 places, 191 transitions, 2004 flow. Second operand has 12 states, 12 states have (on average 7.25) internal successors, (87), 12 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) [2024-06-21 21:10:44,665 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:10:44,665 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 21:10:44,665 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:10:45,031 INFO L124 PetriNetUnfolderBase]: 552/1032 cut-off events. [2024-06-21 21:10:45,031 INFO L125 PetriNetUnfolderBase]: For 134782/134782 co-relation queries the response was YES. [2024-06-21 21:10:45,036 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7941 conditions, 1032 events. 552/1032 cut-off events. For 134782/134782 co-relation queries the response was YES. Maximal size of possible extension queue 93. Compared 5332 event pairs, 102 based on Foata normal form. 2/1032 useless extension candidates. Maximal degree in co-relation 7830. Up to 995 conditions per place. [2024-06-21 21:10:45,039 INFO L140 encePairwiseOnDemand]: 21/31 looper letters, 186 selfloop transitions, 16 changer transitions 0/204 dead transitions. [2024-06-21 21:10:45,039 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 249 places, 204 transitions, 2452 flow [2024-06-21 21:10:45,040 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 21:10:45,040 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 21:10:45,040 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 107 transitions. [2024-06-21 21:10:45,040 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.34516129032258064 [2024-06-21 21:10:45,040 INFO L175 Difference]: Start difference. First operand has 240 places, 191 transitions, 2004 flow. Second operand 10 states and 107 transitions. [2024-06-21 21:10:45,040 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 249 places, 204 transitions, 2452 flow [2024-06-21 21:10:45,348 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 238 places, 204 transitions, 2321 flow, removed 7 selfloop flow, removed 11 redundant places. [2024-06-21 21:10:45,351 INFO L231 Difference]: Finished difference. Result has 239 places, 192 transitions, 1929 flow [2024-06-21 21:10:45,351 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1873, PETRI_DIFFERENCE_MINUEND_PLACES=229, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=191, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=175, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1929, PETRI_PLACES=239, PETRI_TRANSITIONS=192} [2024-06-21 21:10:45,351 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 209 predicate places. [2024-06-21 21:10:45,351 INFO L495 AbstractCegarLoop]: Abstraction has has 239 places, 192 transitions, 1929 flow [2024-06-21 21:10:45,352 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 7.25) internal successors, (87), 12 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) [2024-06-21 21:10:45,352 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:10:45,352 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:10:45,352 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86 [2024-06-21 21:10:45,352 INFO L420 AbstractCegarLoop]: === Iteration 88 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 21:10:45,352 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:10:45,352 INFO L85 PathProgramCache]: Analyzing trace with hash 1471843012, now seen corresponding path program 3 times [2024-06-21 21:10:45,352 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:10:45,353 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [711534927] [2024-06-21 21:10:45,353 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:10:45,353 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:10:45,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:10:46,350 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:10:46,351 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:10:46,351 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [711534927] [2024-06-21 21:10:46,351 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [711534927] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:10:46,351 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:10:46,351 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-21 21:10:46,351 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1034798177] [2024-06-21 21:10:46,351 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:10:46,352 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-21 21:10:46,352 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:10:46,352 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-21 21:10:46,352 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2024-06-21 21:10:46,454 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 21:10:46,454 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 239 places, 192 transitions, 1929 flow. Second operand has 12 states, 12 states have (on average 7.25) internal successors, (87), 12 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) [2024-06-21 21:10:46,454 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:10:46,454 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 21:10:46,455 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:10:46,893 INFO L124 PetriNetUnfolderBase]: 556/1040 cut-off events. [2024-06-21 21:10:46,893 INFO L125 PetriNetUnfolderBase]: For 137979/137979 co-relation queries the response was YES. [2024-06-21 21:10:46,898 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7956 conditions, 1040 events. 556/1040 cut-off events. For 137979/137979 co-relation queries the response was YES. Maximal size of possible extension queue 95. Compared 5397 event pairs, 107 based on Foata normal form. 2/1040 useless extension candidates. Maximal degree in co-relation 7844. Up to 1008 conditions per place. [2024-06-21 21:10:46,900 INFO L140 encePairwiseOnDemand]: 21/31 looper letters, 186 selfloop transitions, 16 changer transitions 0/204 dead transitions. [2024-06-21 21:10:46,901 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 248 places, 204 transitions, 2377 flow [2024-06-21 21:10:46,901 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 21:10:46,901 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 21:10:46,901 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 106 transitions. [2024-06-21 21:10:46,901 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3419354838709677 [2024-06-21 21:10:46,902 INFO L175 Difference]: Start difference. First operand has 239 places, 192 transitions, 1929 flow. Second operand 10 states and 106 transitions. [2024-06-21 21:10:46,902 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 248 places, 204 transitions, 2377 flow [2024-06-21 21:10:47,181 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 240 places, 204 transitions, 2331 flow, removed 8 selfloop flow, removed 8 redundant places. [2024-06-21 21:10:47,183 INFO L231 Difference]: Finished difference. Result has 241 places, 193 transitions, 1941 flow [2024-06-21 21:10:47,183 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1883, PETRI_DIFFERENCE_MINUEND_PLACES=231, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=192, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=176, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1941, PETRI_PLACES=241, PETRI_TRANSITIONS=193} [2024-06-21 21:10:47,183 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 211 predicate places. [2024-06-21 21:10:47,184 INFO L495 AbstractCegarLoop]: Abstraction has has 241 places, 193 transitions, 1941 flow [2024-06-21 21:10:47,184 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 7.25) internal successors, (87), 12 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) [2024-06-21 21:10:47,184 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:10:47,184 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:10:47,184 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable87 [2024-06-21 21:10:47,184 INFO L420 AbstractCegarLoop]: === Iteration 89 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 21:10:47,184 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:10:47,185 INFO L85 PathProgramCache]: Analyzing trace with hash 1471834084, now seen corresponding path program 8 times [2024-06-21 21:10:47,185 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:10:47,185 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1526744634] [2024-06-21 21:10:47,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:10:47,185 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:10:47,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:10:48,181 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:10:48,181 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:10:48,181 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1526744634] [2024-06-21 21:10:48,182 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1526744634] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:10:48,182 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:10:48,182 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 21:10:48,182 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [722118315] [2024-06-21 21:10:48,182 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:10:48,182 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 21:10:48,182 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:10:48,183 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 21:10:48,183 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2024-06-21 21:10:48,318 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 21:10:48,319 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 241 places, 193 transitions, 1941 flow. Second operand has 11 states, 11 states have (on average 7.363636363636363) internal successors, (81), 11 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:10:48,319 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:10:48,319 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 21:10:48,319 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:10:48,772 INFO L124 PetriNetUnfolderBase]: 568/1060 cut-off events. [2024-06-21 21:10:48,772 INFO L125 PetriNetUnfolderBase]: For 141723/141723 co-relation queries the response was YES. [2024-06-21 21:10:48,777 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8129 conditions, 1060 events. 568/1060 cut-off events. For 141723/141723 co-relation queries the response was YES. Maximal size of possible extension queue 99. Compared 5507 event pairs, 102 based on Foata normal form. 2/1060 useless extension candidates. Maximal degree in co-relation 8016. Up to 1009 conditions per place. [2024-06-21 21:10:48,780 INFO L140 encePairwiseOnDemand]: 20/31 looper letters, 186 selfloop transitions, 21 changer transitions 0/209 dead transitions. [2024-06-21 21:10:48,780 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 250 places, 209 transitions, 2449 flow [2024-06-21 21:10:48,781 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 21:10:48,781 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 21:10:48,781 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 111 transitions. [2024-06-21 21:10:48,781 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3580645161290323 [2024-06-21 21:10:48,781 INFO L175 Difference]: Start difference. First operand has 241 places, 193 transitions, 1941 flow. Second operand 10 states and 111 transitions. [2024-06-21 21:10:48,781 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 250 places, 209 transitions, 2449 flow [2024-06-21 21:10:49,084 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 242 places, 209 transitions, 2398 flow, removed 10 selfloop flow, removed 8 redundant places. [2024-06-21 21:10:49,087 INFO L231 Difference]: Finished difference. Result has 243 places, 197 transitions, 2009 flow [2024-06-21 21:10:49,087 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1890, PETRI_DIFFERENCE_MINUEND_PLACES=233, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=193, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=174, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2009, PETRI_PLACES=243, PETRI_TRANSITIONS=197} [2024-06-21 21:10:49,088 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 213 predicate places. [2024-06-21 21:10:49,088 INFO L495 AbstractCegarLoop]: Abstraction has has 243 places, 197 transitions, 2009 flow [2024-06-21 21:10:49,088 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 7.363636363636363) internal successors, (81), 11 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:10:49,088 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:10:49,088 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:10:49,088 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable88 [2024-06-21 21:10:49,088 INFO L420 AbstractCegarLoop]: === Iteration 90 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 21:10:49,089 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:10:49,089 INFO L85 PathProgramCache]: Analyzing trace with hash -1911431890, now seen corresponding path program 4 times [2024-06-21 21:10:49,089 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:10:49,089 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1743221193] [2024-06-21 21:10:49,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:10:49,089 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:10:49,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:10:49,883 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:10:49,884 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:10:49,884 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1743221193] [2024-06-21 21:10:49,884 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1743221193] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:10:49,884 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:10:49,884 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-21 21:10:49,884 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [488286379] [2024-06-21 21:10:49,884 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:10:49,884 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-21 21:10:49,885 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:10:49,885 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-21 21:10:49,885 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2024-06-21 21:10:49,983 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 21:10:49,983 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 243 places, 197 transitions, 2009 flow. Second operand has 12 states, 12 states have (on average 7.25) internal successors, (87), 12 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) [2024-06-21 21:10:49,983 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:10:49,983 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 21:10:49,983 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:10:50,378 INFO L124 PetriNetUnfolderBase]: 572/1068 cut-off events. [2024-06-21 21:10:50,378 INFO L125 PetriNetUnfolderBase]: For 144609/144609 co-relation queries the response was YES. [2024-06-21 21:10:50,384 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8217 conditions, 1068 events. 572/1068 cut-off events. For 144609/144609 co-relation queries the response was YES. Maximal size of possible extension queue 100. Compared 5569 event pairs, 102 based on Foata normal form. 2/1068 useless extension candidates. Maximal degree in co-relation 8103. Up to 1031 conditions per place. [2024-06-21 21:10:50,386 INFO L140 encePairwiseOnDemand]: 21/31 looper letters, 193 selfloop transitions, 15 changer transitions 0/210 dead transitions. [2024-06-21 21:10:50,387 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 252 places, 210 transitions, 2473 flow [2024-06-21 21:10:50,387 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 21:10:50,387 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 21:10:50,387 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 105 transitions. [2024-06-21 21:10:50,388 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3387096774193548 [2024-06-21 21:10:50,388 INFO L175 Difference]: Start difference. First operand has 243 places, 197 transitions, 2009 flow. Second operand 10 states and 105 transitions. [2024-06-21 21:10:50,388 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 252 places, 210 transitions, 2473 flow [2024-06-21 21:10:50,708 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 246 places, 210 transitions, 2417 flow, removed 13 selfloop flow, removed 6 redundant places. [2024-06-21 21:10:50,711 INFO L231 Difference]: Finished difference. Result has 247 places, 198 transitions, 2011 flow [2024-06-21 21:10:50,711 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1953, PETRI_DIFFERENCE_MINUEND_PLACES=237, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=197, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=182, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2011, PETRI_PLACES=247, PETRI_TRANSITIONS=198} [2024-06-21 21:10:50,711 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 217 predicate places. [2024-06-21 21:10:50,711 INFO L495 AbstractCegarLoop]: Abstraction has has 247 places, 198 transitions, 2011 flow [2024-06-21 21:10:50,711 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 7.25) internal successors, (87), 12 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) [2024-06-21 21:10:50,712 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:10:50,712 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:10:50,712 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable89 [2024-06-21 21:10:50,712 INFO L420 AbstractCegarLoop]: === Iteration 91 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 21:10:50,712 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:10:50,712 INFO L85 PathProgramCache]: Analyzing trace with hash 1471596934, now seen corresponding path program 9 times [2024-06-21 21:10:50,712 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:10:50,712 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1999207085] [2024-06-21 21:10:50,713 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:10:50,713 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:10:50,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:10:51,457 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:10:51,458 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:10:51,458 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1999207085] [2024-06-21 21:10:51,458 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1999207085] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:10:51,458 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:10:51,458 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 21:10:51,458 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [841218754] [2024-06-21 21:10:51,458 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:10:51,458 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 21:10:51,458 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:10:51,458 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 21:10:51,458 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2024-06-21 21:10:51,532 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 21:10:51,533 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 247 places, 198 transitions, 2011 flow. Second operand has 11 states, 11 states have (on average 7.363636363636363) internal successors, (81), 11 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:10:51,533 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:10:51,533 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 21:10:51,533 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:10:51,919 INFO L124 PetriNetUnfolderBase]: 588/1094 cut-off events. [2024-06-21 21:10:51,919 INFO L125 PetriNetUnfolderBase]: For 155787/155787 co-relation queries the response was YES. [2024-06-21 21:10:51,926 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8637 conditions, 1094 events. 588/1094 cut-off events. For 155787/155787 co-relation queries the response was YES. Maximal size of possible extension queue 102. Compared 5754 event pairs, 101 based on Foata normal form. 2/1094 useless extension candidates. Maximal degree in co-relation 8522. Up to 990 conditions per place. [2024-06-21 21:10:51,930 INFO L140 encePairwiseOnDemand]: 20/31 looper letters, 182 selfloop transitions, 33 changer transitions 0/217 dead transitions. [2024-06-21 21:10:51,930 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 256 places, 217 transitions, 2747 flow [2024-06-21 21:10:51,931 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 21:10:51,931 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 21:10:51,931 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 116 transitions. [2024-06-21 21:10:51,931 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3741935483870968 [2024-06-21 21:10:51,932 INFO L175 Difference]: Start difference. First operand has 247 places, 198 transitions, 2011 flow. Second operand 10 states and 116 transitions. [2024-06-21 21:10:51,932 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 256 places, 217 transitions, 2747 flow [2024-06-21 21:10:52,355 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 248 places, 217 transitions, 2699 flow, removed 10 selfloop flow, removed 8 redundant places. [2024-06-21 21:10:52,358 INFO L231 Difference]: Finished difference. Result has 250 places, 202 transitions, 2160 flow [2024-06-21 21:10:52,358 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1963, PETRI_DIFFERENCE_MINUEND_PLACES=239, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=198, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=165, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2160, PETRI_PLACES=250, PETRI_TRANSITIONS=202} [2024-06-21 21:10:52,358 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 220 predicate places. [2024-06-21 21:10:52,358 INFO L495 AbstractCegarLoop]: Abstraction has has 250 places, 202 transitions, 2160 flow [2024-06-21 21:10:52,358 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 7.363636363636363) internal successors, (81), 11 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:10:52,358 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:10:52,359 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:10:52,359 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90 [2024-06-21 21:10:52,359 INFO L420 AbstractCegarLoop]: === Iteration 92 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 21:10:52,359 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:10:52,359 INFO L85 PathProgramCache]: Analyzing trace with hash 1492810852, now seen corresponding path program 10 times [2024-06-21 21:10:52,359 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:10:52,360 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [407315406] [2024-06-21 21:10:52,360 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:10:52,360 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:10:52,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:10:53,131 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:10:53,131 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:10:53,131 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [407315406] [2024-06-21 21:10:53,131 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [407315406] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:10:53,131 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:10:53,131 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 21:10:53,131 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1606642631] [2024-06-21 21:10:53,132 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:10:53,132 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 21:10:53,132 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:10:53,132 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 21:10:53,132 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2024-06-21 21:10:53,226 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 21:10:53,226 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 250 places, 202 transitions, 2160 flow. Second operand has 11 states, 11 states have (on average 7.363636363636363) internal successors, (81), 11 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:10:53,226 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:10:53,226 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 21:10:53,226 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:10:53,620 INFO L124 PetriNetUnfolderBase]: 604/1120 cut-off events. [2024-06-21 21:10:53,620 INFO L125 PetriNetUnfolderBase]: For 167947/167947 co-relation queries the response was YES. [2024-06-21 21:10:53,625 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9181 conditions, 1120 events. 604/1120 cut-off events. For 167947/167947 co-relation queries the response was YES. Maximal size of possible extension queue 105. Compared 5897 event pairs, 100 based on Foata normal form. 2/1120 useless extension candidates. Maximal degree in co-relation 9064. Up to 998 conditions per place. [2024-06-21 21:10:53,628 INFO L140 encePairwiseOnDemand]: 20/31 looper letters, 180 selfloop transitions, 40 changer transitions 0/222 dead transitions. [2024-06-21 21:10:53,629 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 259 places, 222 transitions, 2918 flow [2024-06-21 21:10:53,629 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 21:10:53,629 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 21:10:53,629 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 121 transitions. [2024-06-21 21:10:53,629 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3903225806451613 [2024-06-21 21:10:53,630 INFO L175 Difference]: Start difference. First operand has 250 places, 202 transitions, 2160 flow. Second operand 10 states and 121 transitions. [2024-06-21 21:10:53,630 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 259 places, 222 transitions, 2918 flow [2024-06-21 21:10:54,001 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 252 places, 222 transitions, 2817 flow, removed 25 selfloop flow, removed 7 redundant places. [2024-06-21 21:10:54,004 INFO L231 Difference]: Finished difference. Result has 254 places, 206 transitions, 2272 flow [2024-06-21 21:10:54,004 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=2059, PETRI_DIFFERENCE_MINUEND_PLACES=243, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=202, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=162, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2272, PETRI_PLACES=254, PETRI_TRANSITIONS=206} [2024-06-21 21:10:54,004 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 224 predicate places. [2024-06-21 21:10:54,004 INFO L495 AbstractCegarLoop]: Abstraction has has 254 places, 206 transitions, 2272 flow [2024-06-21 21:10:54,005 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 7.363636363636363) internal successors, (81), 11 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:10:54,005 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:10:54,005 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:10:54,005 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91 [2024-06-21 21:10:54,005 INFO L420 AbstractCegarLoop]: === Iteration 93 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 21:10:54,005 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:10:54,005 INFO L85 PathProgramCache]: Analyzing trace with hash -878552460, now seen corresponding path program 11 times [2024-06-21 21:10:54,006 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:10:54,006 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [781339628] [2024-06-21 21:10:54,006 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:10:54,006 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:10:54,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:10:54,748 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:10:54,749 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:10:54,749 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [781339628] [2024-06-21 21:10:54,749 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [781339628] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:10:54,749 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:10:54,749 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 21:10:54,750 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [177597624] [2024-06-21 21:10:54,750 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:10:54,750 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 21:10:54,752 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:10:54,752 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 21:10:54,752 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2024-06-21 21:10:54,828 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 21:10:54,828 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 254 places, 206 transitions, 2272 flow. Second operand has 11 states, 11 states have (on average 7.363636363636363) internal successors, (81), 11 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:10:54,828 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:10:54,828 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 21:10:54,828 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:10:55,175 INFO L124 PetriNetUnfolderBase]: 600/1114 cut-off events. [2024-06-21 21:10:55,176 INFO L125 PetriNetUnfolderBase]: For 164635/164635 co-relation queries the response was YES. [2024-06-21 21:10:55,182 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9010 conditions, 1114 events. 600/1114 cut-off events. For 164635/164635 co-relation queries the response was YES. Maximal size of possible extension queue 105. Compared 5852 event pairs, 108 based on Foata normal form. 2/1114 useless extension candidates. Maximal degree in co-relation 8891. Up to 1067 conditions per place. [2024-06-21 21:10:55,185 INFO L140 encePairwiseOnDemand]: 20/31 looper letters, 199 selfloop transitions, 18 changer transitions 0/219 dead transitions. [2024-06-21 21:10:55,185 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 263 places, 219 transitions, 2734 flow [2024-06-21 21:10:55,186 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 21:10:55,186 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 21:10:55,186 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 110 transitions. [2024-06-21 21:10:55,186 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3548387096774194 [2024-06-21 21:10:55,186 INFO L175 Difference]: Start difference. First operand has 254 places, 206 transitions, 2272 flow. Second operand 10 states and 110 transitions. [2024-06-21 21:10:55,186 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 263 places, 219 transitions, 2734 flow [2024-06-21 21:10:55,483 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 256 places, 219 transitions, 2605 flow, removed 29 selfloop flow, removed 7 redundant places. [2024-06-21 21:10:55,485 INFO L231 Difference]: Finished difference. Result has 257 places, 206 transitions, 2184 flow [2024-06-21 21:10:55,486 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=2143, PETRI_DIFFERENCE_MINUEND_PLACES=247, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=206, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=188, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2184, PETRI_PLACES=257, PETRI_TRANSITIONS=206} [2024-06-21 21:10:55,489 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 227 predicate places. [2024-06-21 21:10:55,489 INFO L495 AbstractCegarLoop]: Abstraction has has 257 places, 206 transitions, 2184 flow [2024-06-21 21:10:55,489 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 7.363636363636363) internal successors, (81), 11 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:10:55,489 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:10:55,489 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:10:55,489 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92 [2024-06-21 21:10:55,489 INFO L420 AbstractCegarLoop]: === Iteration 94 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 21:10:55,490 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:10:55,490 INFO L85 PathProgramCache]: Analyzing trace with hash -886833366, now seen corresponding path program 17 times [2024-06-21 21:10:55,490 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:10:55,490 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1473355257] [2024-06-21 21:10:55,490 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:10:55,490 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:10:55,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:10:56,289 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:10:56,289 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:10:56,289 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1473355257] [2024-06-21 21:10:56,290 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1473355257] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:10:56,290 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:10:56,290 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 21:10:56,290 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [779872886] [2024-06-21 21:10:56,290 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:10:56,290 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 21:10:56,290 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:10:56,290 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 21:10:56,290 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-21 21:10:56,404 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 21:10:56,404 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 257 places, 206 transitions, 2184 flow. Second operand has 11 states, 11 states have (on average 7.363636363636363) internal successors, (81), 11 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:10:56,404 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:10:56,404 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 21:10:56,404 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:10:56,784 INFO L124 PetriNetUnfolderBase]: 604/1122 cut-off events. [2024-06-21 21:10:56,784 INFO L125 PetriNetUnfolderBase]: For 166835/166835 co-relation queries the response was YES. [2024-06-21 21:10:56,791 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8950 conditions, 1122 events. 604/1122 cut-off events. For 166835/166835 co-relation queries the response was YES. Maximal size of possible extension queue 108. Compared 5935 event pairs, 117 based on Foata normal form. 2/1122 useless extension candidates. Maximal degree in co-relation 8830. Up to 1090 conditions per place. [2024-06-21 21:10:56,794 INFO L140 encePairwiseOnDemand]: 21/31 looper letters, 198 selfloop transitions, 17 changer transitions 0/217 dead transitions. [2024-06-21 21:10:56,794 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 266 places, 217 transitions, 2650 flow [2024-06-21 21:10:56,794 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 21:10:56,794 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 21:10:56,794 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 106 transitions. [2024-06-21 21:10:56,795 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3419354838709677 [2024-06-21 21:10:56,795 INFO L175 Difference]: Start difference. First operand has 257 places, 206 transitions, 2184 flow. Second operand 10 states and 106 transitions. [2024-06-21 21:10:56,795 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 266 places, 217 transitions, 2650 flow [2024-06-21 21:10:57,107 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 258 places, 217 transitions, 2595 flow, removed 11 selfloop flow, removed 8 redundant places. [2024-06-21 21:10:57,110 INFO L231 Difference]: Finished difference. Result has 259 places, 207 transitions, 2183 flow [2024-06-21 21:10:57,110 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=2129, PETRI_DIFFERENCE_MINUEND_PLACES=249, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=206, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=189, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2183, PETRI_PLACES=259, PETRI_TRANSITIONS=207} [2024-06-21 21:10:57,111 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 229 predicate places. [2024-06-21 21:10:57,111 INFO L495 AbstractCegarLoop]: Abstraction has has 259 places, 207 transitions, 2183 flow [2024-06-21 21:10:57,111 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 7.363636363636363) internal successors, (81), 11 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:10:57,111 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:10:57,111 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:10:57,111 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93 [2024-06-21 21:10:57,111 INFO L420 AbstractCegarLoop]: === Iteration 95 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 21:10:57,111 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:10:57,112 INFO L85 PathProgramCache]: Analyzing trace with hash -886826670, now seen corresponding path program 12 times [2024-06-21 21:10:57,112 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:10:57,112 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [408531736] [2024-06-21 21:10:57,112 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:10:57,112 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:10:57,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:10:57,873 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:10:57,874 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:10:57,874 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [408531736] [2024-06-21 21:10:57,874 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [408531736] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:10:57,874 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:10:57,874 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 21:10:57,874 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1271271980] [2024-06-21 21:10:57,874 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:10:57,874 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 21:10:57,875 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:10:57,875 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 21:10:57,875 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2024-06-21 21:10:57,975 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 21:10:57,975 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 259 places, 207 transitions, 2183 flow. Second operand has 11 states, 11 states have (on average 7.363636363636363) internal successors, (81), 11 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:10:57,975 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:10:57,975 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 21:10:57,975 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:10:58,288 INFO L124 PetriNetUnfolderBase]: 600/1116 cut-off events. [2024-06-21 21:10:58,288 INFO L125 PetriNetUnfolderBase]: For 162859/162859 co-relation queries the response was YES. [2024-06-21 21:10:58,294 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8742 conditions, 1116 events. 600/1116 cut-off events. For 162859/162859 co-relation queries the response was YES. Maximal size of possible extension queue 108. Compared 5908 event pairs, 110 based on Foata normal form. 2/1116 useless extension candidates. Maximal degree in co-relation 8621. Up to 1065 conditions per place. [2024-06-21 21:10:58,297 INFO L140 encePairwiseOnDemand]: 20/31 looper letters, 197 selfloop transitions, 21 changer transitions 0/220 dead transitions. [2024-06-21 21:10:58,297 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 268 places, 220 transitions, 2647 flow [2024-06-21 21:10:58,298 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 21:10:58,298 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 21:10:58,298 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 112 transitions. [2024-06-21 21:10:58,298 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36129032258064514 [2024-06-21 21:10:58,298 INFO L175 Difference]: Start difference. First operand has 259 places, 207 transitions, 2183 flow. Second operand 10 states and 112 transitions. [2024-06-21 21:10:58,298 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 268 places, 220 transitions, 2647 flow [2024-06-21 21:10:58,619 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 260 places, 220 transitions, 2589 flow, removed 13 selfloop flow, removed 8 redundant places. [2024-06-21 21:10:58,622 INFO L231 Difference]: Finished difference. Result has 261 places, 207 transitions, 2172 flow [2024-06-21 21:10:58,622 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=2125, PETRI_DIFFERENCE_MINUEND_PLACES=251, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=207, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=186, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2172, PETRI_PLACES=261, PETRI_TRANSITIONS=207} [2024-06-21 21:10:58,622 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 231 predicate places. [2024-06-21 21:10:58,622 INFO L495 AbstractCegarLoop]: Abstraction has has 261 places, 207 transitions, 2172 flow [2024-06-21 21:10:58,623 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 7.363636363636363) internal successors, (81), 11 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:10:58,623 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:10:58,623 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:10:58,623 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94 [2024-06-21 21:10:58,623 INFO L420 AbstractCegarLoop]: === Iteration 96 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 21:10:58,623 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:10:58,623 INFO L85 PathProgramCache]: Analyzing trace with hash -254670694, now seen corresponding path program 18 times [2024-06-21 21:10:58,624 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:10:58,624 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [788203604] [2024-06-21 21:10:58,624 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:10:58,624 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:10:58,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:10:59,481 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:10:59,481 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:10:59,481 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [788203604] [2024-06-21 21:10:59,481 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [788203604] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:10:59,481 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:10:59,481 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 21:10:59,481 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1234106751] [2024-06-21 21:10:59,481 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:10:59,481 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 21:10:59,481 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:10:59,481 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 21:10:59,482 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2024-06-21 21:10:59,576 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 21:10:59,576 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 261 places, 207 transitions, 2172 flow. Second operand has 11 states, 11 states have (on average 7.363636363636363) internal successors, (81), 11 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:10:59,576 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:10:59,576 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 21:10:59,576 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:11:00,003 INFO L124 PetriNetUnfolderBase]: 628/1182 cut-off events. [2024-06-21 21:11:00,003 INFO L125 PetriNetUnfolderBase]: For 237233/237233 co-relation queries the response was YES. [2024-06-21 21:11:00,011 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8792 conditions, 1182 events. 628/1182 cut-off events. For 237233/237233 co-relation queries the response was YES. Maximal size of possible extension queue 110. Compared 6399 event pairs, 114 based on Foata normal form. 22/1202 useless extension candidates. Maximal degree in co-relation 8670. Up to 1013 conditions per place. [2024-06-21 21:11:00,014 INFO L140 encePairwiseOnDemand]: 20/31 looper letters, 183 selfloop transitions, 30 changer transitions 12/227 dead transitions. [2024-06-21 21:11:00,015 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 270 places, 227 transitions, 2710 flow [2024-06-21 21:11:00,015 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 21:11:00,015 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 21:11:00,015 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 123 transitions. [2024-06-21 21:11:00,016 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3967741935483871 [2024-06-21 21:11:00,016 INFO L175 Difference]: Start difference. First operand has 261 places, 207 transitions, 2172 flow. Second operand 10 states and 123 transitions. [2024-06-21 21:11:00,016 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 270 places, 227 transitions, 2710 flow [2024-06-21 21:11:00,417 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 260 places, 227 transitions, 2623 flow, removed 13 selfloop flow, removed 10 redundant places. [2024-06-21 21:11:00,420 INFO L231 Difference]: Finished difference. Result has 262 places, 203 transitions, 2112 flow [2024-06-21 21:11:00,420 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=2085, PETRI_DIFFERENCE_MINUEND_PLACES=251, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=207, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=177, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2112, PETRI_PLACES=262, PETRI_TRANSITIONS=203} [2024-06-21 21:11:00,420 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 232 predicate places. [2024-06-21 21:11:00,420 INFO L495 AbstractCegarLoop]: Abstraction has has 262 places, 203 transitions, 2112 flow [2024-06-21 21:11:00,420 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 7.363636363636363) internal successors, (81), 11 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:11:00,420 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:11:00,421 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:11:00,421 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable95 [2024-06-21 21:11:00,421 INFO L420 AbstractCegarLoop]: === Iteration 97 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 21:11:00,421 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:11:00,421 INFO L85 PathProgramCache]: Analyzing trace with hash -254848324, now seen corresponding path program 19 times [2024-06-21 21:11:00,421 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:11:00,421 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [219491466] [2024-06-21 21:11:00,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:11:00,422 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:11:00,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:11:01,211 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:11:01,211 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:11:01,212 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [219491466] [2024-06-21 21:11:01,212 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [219491466] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:11:01,212 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:11:01,212 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 21:11:01,212 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [234341211] [2024-06-21 21:11:01,212 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:11:01,212 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 21:11:01,212 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:11:01,213 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 21:11:01,213 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2024-06-21 21:11:01,319 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 21:11:01,319 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 262 places, 203 transitions, 2112 flow. Second operand has 11 states, 11 states have (on average 7.363636363636363) internal successors, (81), 11 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:11:01,319 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:11:01,319 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 21:11:01,319 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:11:01,710 INFO L124 PetriNetUnfolderBase]: 590/1104 cut-off events. [2024-06-21 21:11:01,711 INFO L125 PetriNetUnfolderBase]: For 165853/165853 co-relation queries the response was YES. [2024-06-21 21:11:01,717 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8534 conditions, 1104 events. 590/1104 cut-off events. For 165853/165853 co-relation queries the response was YES. Maximal size of possible extension queue 107. Compared 5850 event pairs, 95 based on Foata normal form. 2/1104 useless extension candidates. Maximal degree in co-relation 8410. Up to 819 conditions per place. [2024-06-21 21:11:01,720 INFO L140 encePairwiseOnDemand]: 20/31 looper letters, 177 selfloop transitions, 46 changer transitions 0/225 dead transitions. [2024-06-21 21:11:01,720 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 271 places, 225 transitions, 3016 flow [2024-06-21 21:11:01,721 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 21:11:01,721 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 21:11:01,721 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 124 transitions. [2024-06-21 21:11:01,721 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4 [2024-06-21 21:11:01,721 INFO L175 Difference]: Start difference. First operand has 262 places, 203 transitions, 2112 flow. Second operand 10 states and 124 transitions. [2024-06-21 21:11:01,721 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 271 places, 225 transitions, 3016 flow [2024-06-21 21:11:02,022 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 260 places, 225 transitions, 2932 flow, removed 9 selfloop flow, removed 11 redundant places. [2024-06-21 21:11:02,025 INFO L231 Difference]: Finished difference. Result has 261 places, 204 transitions, 2146 flow [2024-06-21 21:11:02,025 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=2032, PETRI_DIFFERENCE_MINUEND_PLACES=251, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=203, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=45, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=158, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2146, PETRI_PLACES=261, PETRI_TRANSITIONS=204} [2024-06-21 21:11:02,025 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 231 predicate places. [2024-06-21 21:11:02,025 INFO L495 AbstractCegarLoop]: Abstraction has has 261 places, 204 transitions, 2146 flow [2024-06-21 21:11:02,026 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 7.363636363636363) internal successors, (81), 11 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:11:02,026 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:11:02,026 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:11:02,026 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable96 [2024-06-21 21:11:02,026 INFO L420 AbstractCegarLoop]: === Iteration 98 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 21:11:02,026 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:11:02,026 INFO L85 PathProgramCache]: Analyzing trace with hash -254843674, now seen corresponding path program 20 times [2024-06-21 21:11:02,027 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:11:02,027 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1290717846] [2024-06-21 21:11:02,027 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:11:02,027 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:11:02,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:11:02,816 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:11:02,816 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:11:02,816 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1290717846] [2024-06-21 21:11:02,816 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1290717846] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:11:02,816 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:11:02,816 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 21:11:02,817 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1095704845] [2024-06-21 21:11:02,817 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:11:02,817 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 21:11:02,817 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:11:02,817 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 21:11:02,817 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2024-06-21 21:11:02,910 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 21:11:02,911 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 261 places, 204 transitions, 2146 flow. Second operand has 11 states, 11 states have (on average 7.363636363636363) internal successors, (81), 11 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:11:02,911 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:11:02,911 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 21:11:02,911 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:11:03,340 INFO L124 PetriNetUnfolderBase]: 594/1112 cut-off events. [2024-06-21 21:11:03,340 INFO L125 PetriNetUnfolderBase]: For 167137/167137 co-relation queries the response was YES. [2024-06-21 21:11:03,347 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8607 conditions, 1112 events. 594/1112 cut-off events. For 167137/167137 co-relation queries the response was YES. Maximal size of possible extension queue 110. Compared 5898 event pairs, 101 based on Foata normal form. 2/1112 useless extension candidates. Maximal degree in co-relation 8483. Up to 984 conditions per place. [2024-06-21 21:11:03,350 INFO L140 encePairwiseOnDemand]: 20/31 looper letters, 173 selfloop transitions, 45 changer transitions 0/220 dead transitions. [2024-06-21 21:11:03,350 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 271 places, 220 transitions, 2816 flow [2024-06-21 21:11:03,351 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 21:11:03,351 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 21:11:03,351 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 125 transitions. [2024-06-21 21:11:03,351 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36656891495601174 [2024-06-21 21:11:03,351 INFO L175 Difference]: Start difference. First operand has 261 places, 204 transitions, 2146 flow. Second operand 11 states and 125 transitions. [2024-06-21 21:11:03,352 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 271 places, 220 transitions, 2816 flow [2024-06-21 21:11:03,718 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 261 places, 220 transitions, 2594 flow, removed 13 selfloop flow, removed 10 redundant places. [2024-06-21 21:11:03,721 INFO L231 Difference]: Finished difference. Result has 262 places, 205 transitions, 2042 flow [2024-06-21 21:11:03,721 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1930, PETRI_DIFFERENCE_MINUEND_PLACES=251, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=204, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=44, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=159, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=2042, PETRI_PLACES=262, PETRI_TRANSITIONS=205} [2024-06-21 21:11:03,722 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 232 predicate places. [2024-06-21 21:11:03,722 INFO L495 AbstractCegarLoop]: Abstraction has has 262 places, 205 transitions, 2042 flow [2024-06-21 21:11:03,722 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 7.363636363636363) internal successors, (81), 11 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:11:03,722 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:11:03,722 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:11:03,722 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable97 [2024-06-21 21:11:03,722 INFO L420 AbstractCegarLoop]: === Iteration 99 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 21:11:03,723 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:11:03,723 INFO L85 PathProgramCache]: Analyzing trace with hash -248407888, now seen corresponding path program 13 times [2024-06-21 21:11:03,723 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:11:03,723 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [200014941] [2024-06-21 21:11:03,723 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:11:03,723 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:11:03,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:11:04,572 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:11:04,572 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:11:04,572 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [200014941] [2024-06-21 21:11:04,572 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [200014941] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:11:04,573 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:11:04,573 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 21:11:04,573 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1508826925] [2024-06-21 21:11:04,573 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:11:04,573 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 21:11:04,573 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:11:04,573 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 21:11:04,574 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2024-06-21 21:11:04,694 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 21:11:04,694 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 262 places, 205 transitions, 2042 flow. Second operand has 11 states, 11 states have (on average 7.363636363636363) internal successors, (81), 11 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:11:04,694 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:11:04,694 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 21:11:04,694 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:11:05,126 INFO L124 PetriNetUnfolderBase]: 606/1132 cut-off events. [2024-06-21 21:11:05,126 INFO L125 PetriNetUnfolderBase]: For 170736/170736 co-relation queries the response was YES. [2024-06-21 21:11:05,132 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8536 conditions, 1132 events. 606/1132 cut-off events. For 170736/170736 co-relation queries the response was YES. Maximal size of possible extension queue 113. Compared 6052 event pairs, 106 based on Foata normal form. 2/1132 useless extension candidates. Maximal degree in co-relation 8413. Up to 1046 conditions per place. [2024-06-21 21:11:05,135 INFO L140 encePairwiseOnDemand]: 20/31 looper letters, 191 selfloop transitions, 30 changer transitions 0/223 dead transitions. [2024-06-21 21:11:05,135 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 271 places, 223 transitions, 2593 flow [2024-06-21 21:11:05,135 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 21:11:05,136 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 21:11:05,136 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 118 transitions. [2024-06-21 21:11:05,148 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38064516129032255 [2024-06-21 21:11:05,148 INFO L175 Difference]: Start difference. First operand has 262 places, 205 transitions, 2042 flow. Second operand 10 states and 118 transitions. [2024-06-21 21:11:05,148 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 271 places, 223 transitions, 2593 flow [2024-06-21 21:11:05,523 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 261 places, 223 transitions, 2472 flow, removed 10 selfloop flow, removed 10 redundant places. [2024-06-21 21:11:05,531 INFO L231 Difference]: Finished difference. Result has 262 places, 209 transitions, 2069 flow [2024-06-21 21:11:05,532 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1933, PETRI_DIFFERENCE_MINUEND_PLACES=252, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=205, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=177, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2069, PETRI_PLACES=262, PETRI_TRANSITIONS=209} [2024-06-21 21:11:05,532 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 232 predicate places. [2024-06-21 21:11:05,532 INFO L495 AbstractCegarLoop]: Abstraction has has 262 places, 209 transitions, 2069 flow [2024-06-21 21:11:05,532 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 7.363636363636363) internal successors, (81), 11 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:11:05,532 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:11:05,532 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:11:05,533 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable98 [2024-06-21 21:11:05,533 INFO L420 AbstractCegarLoop]: === Iteration 100 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 21:11:05,533 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:11:05,533 INFO L85 PathProgramCache]: Analyzing trace with hash -248168320, now seen corresponding path program 5 times [2024-06-21 21:11:05,533 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:11:05,533 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [495163690] [2024-06-21 21:11:05,533 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:11:05,533 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:11:05,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:11:06,442 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:11:06,443 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:11:06,443 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [495163690] [2024-06-21 21:11:06,443 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [495163690] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:11:06,443 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:11:06,443 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-21 21:11:06,443 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [195196996] [2024-06-21 21:11:06,443 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:11:06,444 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-21 21:11:06,444 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:11:06,444 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-21 21:11:06,444 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2024-06-21 21:11:06,531 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 21:11:06,532 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 262 places, 209 transitions, 2069 flow. Second operand has 12 states, 12 states have (on average 7.25) internal successors, (87), 12 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) [2024-06-21 21:11:06,532 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:11:06,532 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 21:11:06,532 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:11:06,903 INFO L124 PetriNetUnfolderBase]: 603/1127 cut-off events. [2024-06-21 21:11:06,904 INFO L125 PetriNetUnfolderBase]: For 160605/160605 co-relation queries the response was YES. [2024-06-21 21:11:06,913 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8243 conditions, 1127 events. 603/1127 cut-off events. For 160605/160605 co-relation queries the response was YES. Maximal size of possible extension queue 114. Compared 6020 event pairs, 110 based on Foata normal form. 2/1127 useless extension candidates. Maximal degree in co-relation 8120. Up to 1083 conditions per place. [2024-06-21 21:11:06,917 INFO L140 encePairwiseOnDemand]: 21/31 looper letters, 199 selfloop transitions, 20 changer transitions 0/221 dead transitions. [2024-06-21 21:11:06,917 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 271 places, 221 transitions, 2533 flow [2024-06-21 21:11:06,917 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 21:11:06,917 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 21:11:06,918 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 110 transitions. [2024-06-21 21:11:06,918 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3548387096774194 [2024-06-21 21:11:06,918 INFO L175 Difference]: Start difference. First operand has 262 places, 209 transitions, 2069 flow. Second operand 10 states and 110 transitions. [2024-06-21 21:11:06,918 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 271 places, 221 transitions, 2533 flow [2024-06-21 21:11:07,370 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 264 places, 221 transitions, 2450 flow, removed 14 selfloop flow, removed 7 redundant places. [2024-06-21 21:11:07,373 INFO L231 Difference]: Finished difference. Result has 265 places, 209 transitions, 2030 flow [2024-06-21 21:11:07,373 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1986, PETRI_DIFFERENCE_MINUEND_PLACES=255, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=209, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=189, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2030, PETRI_PLACES=265, PETRI_TRANSITIONS=209} [2024-06-21 21:11:07,374 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 235 predicate places. [2024-06-21 21:11:07,374 INFO L495 AbstractCegarLoop]: Abstraction has has 265 places, 209 transitions, 2030 flow [2024-06-21 21:11:07,374 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 7.25) internal successors, (87), 12 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) [2024-06-21 21:11:07,374 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:11:07,374 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:11:07,374 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable99 [2024-06-21 21:11:07,374 INFO L420 AbstractCegarLoop]: === Iteration 101 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 21:11:07,375 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:11:07,375 INFO L85 PathProgramCache]: Analyzing trace with hash 2110015530, now seen corresponding path program 21 times [2024-06-21 21:11:07,375 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:11:07,375 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1654857329] [2024-06-21 21:11:07,375 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:11:07,375 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:11:07,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:11:08,265 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:11:08,265 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:11:08,265 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1654857329] [2024-06-21 21:11:08,265 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1654857329] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:11:08,265 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:11:08,265 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 21:11:08,265 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1926557148] [2024-06-21 21:11:08,266 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:11:08,266 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 21:11:08,266 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:11:08,266 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 21:11:08,266 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2024-06-21 21:11:08,357 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 21:11:08,357 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 265 places, 209 transitions, 2030 flow. Second operand has 11 states, 11 states have (on average 7.363636363636363) internal successors, (81), 11 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:11:08,357 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:11:08,357 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 21:11:08,357 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:11:08,774 INFO L124 PetriNetUnfolderBase]: 624/1180 cut-off events. [2024-06-21 21:11:08,774 INFO L125 PetriNetUnfolderBase]: For 232137/232137 co-relation queries the response was YES. [2024-06-21 21:11:08,781 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7997 conditions, 1180 events. 624/1180 cut-off events. For 232137/232137 co-relation queries the response was YES. Maximal size of possible extension queue 114. Compared 6404 event pairs, 113 based on Foata normal form. 22/1200 useless extension candidates. Maximal degree in co-relation 7873. Up to 997 conditions per place. [2024-06-21 21:11:08,784 INFO L140 encePairwiseOnDemand]: 20/31 looper letters, 184 selfloop transitions, 25 changer transitions 17/228 dead transitions. [2024-06-21 21:11:08,784 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 274 places, 228 transitions, 2554 flow [2024-06-21 21:11:08,785 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 21:11:08,785 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 21:11:08,785 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 124 transitions. [2024-06-21 21:11:08,785 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4 [2024-06-21 21:11:08,786 INFO L175 Difference]: Start difference. First operand has 265 places, 209 transitions, 2030 flow. Second operand 10 states and 124 transitions. [2024-06-21 21:11:08,786 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 274 places, 228 transitions, 2554 flow [2024-06-21 21:11:09,137 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 261 places, 228 transitions, 2402 flow, removed 20 selfloop flow, removed 13 redundant places. [2024-06-21 21:11:09,140 INFO L231 Difference]: Finished difference. Result has 263 places, 199 transitions, 1824 flow [2024-06-21 21:11:09,140 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1878, PETRI_DIFFERENCE_MINUEND_PLACES=252, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=209, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=184, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1824, PETRI_PLACES=263, PETRI_TRANSITIONS=199} [2024-06-21 21:11:09,140 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 233 predicate places. [2024-06-21 21:11:09,140 INFO L495 AbstractCegarLoop]: Abstraction has has 263 places, 199 transitions, 1824 flow [2024-06-21 21:11:09,141 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 7.363636363636363) internal successors, (81), 11 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:11:09,141 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:11:09,141 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:11:09,141 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable100 [2024-06-21 21:11:09,141 INFO L420 AbstractCegarLoop]: === Iteration 102 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 21:11:09,141 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:11:09,141 INFO L85 PathProgramCache]: Analyzing trace with hash -254843488, now seen corresponding path program 14 times [2024-06-21 21:11:09,141 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:11:09,142 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1218280949] [2024-06-21 21:11:09,142 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:11:09,142 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:11:09,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:11:09,937 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:11:09,937 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:11:09,937 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1218280949] [2024-06-21 21:11:09,937 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1218280949] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:11:09,937 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:11:09,937 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 21:11:09,938 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1291768801] [2024-06-21 21:11:09,938 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:11:09,938 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 21:11:09,938 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:11:09,938 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 21:11:09,938 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2024-06-21 21:11:10,060 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 21:11:10,060 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 263 places, 199 transitions, 1824 flow. Second operand has 11 states, 11 states have (on average 7.363636363636363) internal successors, (81), 11 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:11:10,060 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:11:10,060 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 21:11:10,060 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:11:10,465 INFO L124 PetriNetUnfolderBase]: 572/1080 cut-off events. [2024-06-21 21:11:10,465 INFO L125 PetriNetUnfolderBase]: For 154374/154374 co-relation queries the response was YES. [2024-06-21 21:11:10,471 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7508 conditions, 1080 events. 572/1080 cut-off events. For 154374/154374 co-relation queries the response was YES. Maximal size of possible extension queue 107. Compared 5725 event pairs, 93 based on Foata normal form. 2/1080 useless extension candidates. Maximal degree in co-relation 7386. Up to 928 conditions per place. [2024-06-21 21:11:10,474 INFO L140 encePairwiseOnDemand]: 20/31 looper letters, 165 selfloop transitions, 50 changer transitions 0/217 dead transitions. [2024-06-21 21:11:10,474 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 271 places, 217 transitions, 2544 flow [2024-06-21 21:11:10,474 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 21:11:10,475 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 21:11:10,475 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 128 transitions. [2024-06-21 21:11:10,475 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.375366568914956 [2024-06-21 21:11:10,475 INFO L175 Difference]: Start difference. First operand has 263 places, 199 transitions, 1824 flow. Second operand 11 states and 128 transitions. [2024-06-21 21:11:10,475 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 271 places, 217 transitions, 2544 flow [2024-06-21 21:11:10,827 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 255 places, 217 transitions, 2357 flow, removed 9 selfloop flow, removed 16 redundant places. [2024-06-21 21:11:10,830 INFO L231 Difference]: Finished difference. Result has 256 places, 201 transitions, 1812 flow [2024-06-21 21:11:10,830 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1641, PETRI_DIFFERENCE_MINUEND_PLACES=245, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=199, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=48, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=151, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=1812, PETRI_PLACES=256, PETRI_TRANSITIONS=201} [2024-06-21 21:11:10,830 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 226 predicate places. [2024-06-21 21:11:10,830 INFO L495 AbstractCegarLoop]: Abstraction has has 256 places, 201 transitions, 1812 flow [2024-06-21 21:11:10,831 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 7.363636363636363) internal successors, (81), 11 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:11:10,831 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:11:10,831 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:11:10,831 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable101 [2024-06-21 21:11:10,831 INFO L420 AbstractCegarLoop]: === Iteration 103 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 21:11:10,831 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:11:10,831 INFO L85 PathProgramCache]: Analyzing trace with hash -248414398, now seen corresponding path program 15 times [2024-06-21 21:11:10,831 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:11:10,832 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1291424443] [2024-06-21 21:11:10,832 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:11:10,832 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:11:10,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:11:11,586 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:11:11,586 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:11:11,586 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1291424443] [2024-06-21 21:11:11,586 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1291424443] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:11:11,586 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:11:11,586 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 21:11:11,586 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2111387687] [2024-06-21 21:11:11,586 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:11:11,586 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 21:11:11,587 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:11:11,587 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 21:11:11,587 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2024-06-21 21:11:11,681 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 21:11:11,681 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 256 places, 201 transitions, 1812 flow. Second operand has 11 states, 11 states have (on average 7.363636363636363) internal successors, (81), 11 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:11:11,681 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:11:11,681 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 21:11:11,681 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:11:12,009 INFO L124 PetriNetUnfolderBase]: 517/969 cut-off events. [2024-06-21 21:11:12,010 INFO L125 PetriNetUnfolderBase]: For 63664/63664 co-relation queries the response was YES. [2024-06-21 21:11:12,014 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5075 conditions, 969 events. 517/969 cut-off events. For 63664/63664 co-relation queries the response was YES. Maximal size of possible extension queue 107. Compared 5145 event pairs, 61 based on Foata normal form. 2/969 useless extension candidates. Maximal degree in co-relation 4956. Up to 874 conditions per place. [2024-06-21 21:11:12,017 INFO L140 encePairwiseOnDemand]: 20/31 looper letters, 182 selfloop transitions, 30 changer transitions 0/214 dead transitions. [2024-06-21 21:11:12,017 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 265 places, 214 transitions, 2264 flow [2024-06-21 21:11:12,017 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 21:11:12,017 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 21:11:12,017 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 116 transitions. [2024-06-21 21:11:12,018 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3741935483870968 [2024-06-21 21:11:12,018 INFO L175 Difference]: Start difference. First operand has 256 places, 201 transitions, 1812 flow. Second operand 10 states and 116 transitions. [2024-06-21 21:11:12,018 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 265 places, 214 transitions, 2264 flow [2024-06-21 21:11:12,193 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 255 places, 214 transitions, 2016 flow, removed 48 selfloop flow, removed 10 redundant places. [2024-06-21 21:11:12,196 INFO L231 Difference]: Finished difference. Result has 256 places, 201 transitions, 1629 flow [2024-06-21 21:11:12,196 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1564, PETRI_DIFFERENCE_MINUEND_PLACES=246, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=201, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=171, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1629, PETRI_PLACES=256, PETRI_TRANSITIONS=201} [2024-06-21 21:11:12,196 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 226 predicate places. [2024-06-21 21:11:12,196 INFO L495 AbstractCegarLoop]: Abstraction has has 256 places, 201 transitions, 1629 flow [2024-06-21 21:11:12,196 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 7.363636363636363) internal successors, (81), 11 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:11:12,196 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:11:12,197 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:11:12,197 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable102 [2024-06-21 21:11:12,197 INFO L420 AbstractCegarLoop]: === Iteration 104 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 21:11:12,197 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:11:12,197 INFO L85 PathProgramCache]: Analyzing trace with hash -1761319748, now seen corresponding path program 1 times [2024-06-21 21:11:12,197 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:11:12,197 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1957484505] [2024-06-21 21:11:12,197 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:11:12,198 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:11:12,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:11:13,028 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:11:13,029 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:11:13,029 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1957484505] [2024-06-21 21:11:13,029 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1957484505] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:11:13,029 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:11:13,029 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-21 21:11:13,029 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [516001007] [2024-06-21 21:11:13,029 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:11:13,029 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-21 21:11:13,030 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:11:13,030 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-21 21:11:13,030 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2024-06-21 21:11:13,118 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 21:11:13,125 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 256 places, 201 transitions, 1629 flow. Second operand has 12 states, 12 states have (on average 7.333333333333333) internal successors, (88), 12 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:11:13,125 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:11:13,125 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 21:11:13,125 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:11:13,469 INFO L124 PetriNetUnfolderBase]: 565/1069 cut-off events. [2024-06-21 21:11:13,469 INFO L125 PetriNetUnfolderBase]: For 143469/143469 co-relation queries the response was YES. [2024-06-21 21:11:13,476 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6273 conditions, 1069 events. 565/1069 cut-off events. For 143469/143469 co-relation queries the response was YES. Maximal size of possible extension queue 108. Compared 5703 event pairs, 83 based on Foata normal form. 8/1075 useless extension candidates. Maximal degree in co-relation 6154. Up to 554 conditions per place. [2024-06-21 21:11:13,478 INFO L140 encePairwiseOnDemand]: 20/31 looper letters, 134 selfloop transitions, 79 changer transitions 18/233 dead transitions. [2024-06-21 21:11:13,478 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 266 places, 233 transitions, 2401 flow [2024-06-21 21:11:13,479 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 21:11:13,479 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 21:11:13,479 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 142 transitions. [2024-06-21 21:11:13,479 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41642228739002934 [2024-06-21 21:11:13,479 INFO L175 Difference]: Start difference. First operand has 256 places, 201 transitions, 1629 flow. Second operand 11 states and 142 transitions. [2024-06-21 21:11:13,479 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 266 places, 233 transitions, 2401 flow [2024-06-21 21:11:13,753 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 254 places, 233 transitions, 2152 flow, removed 7 selfloop flow, removed 12 redundant places. [2024-06-21 21:11:13,756 INFO L231 Difference]: Finished difference. Result has 255 places, 197 transitions, 1520 flow [2024-06-21 21:11:13,756 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1380, PETRI_DIFFERENCE_MINUEND_PLACES=244, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=201, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=79, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=122, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=1520, PETRI_PLACES=255, PETRI_TRANSITIONS=197} [2024-06-21 21:11:13,756 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 225 predicate places. [2024-06-21 21:11:13,756 INFO L495 AbstractCegarLoop]: Abstraction has has 255 places, 197 transitions, 1520 flow [2024-06-21 21:11:13,756 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 7.333333333333333) internal successors, (88), 12 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:11:13,757 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:11:13,757 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:11:13,757 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable103 [2024-06-21 21:11:13,757 INFO L420 AbstractCegarLoop]: === Iteration 105 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 21:11:13,757 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:11:13,757 INFO L85 PathProgramCache]: Analyzing trace with hash -957557456, now seen corresponding path program 2 times [2024-06-21 21:11:13,757 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:11:13,758 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1254301025] [2024-06-21 21:11:13,758 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:11:13,758 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:11:13,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:11:14,454 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:11:14,455 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:11:14,455 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1254301025] [2024-06-21 21:11:14,460 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1254301025] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:11:14,460 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:11:14,460 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-21 21:11:14,460 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1083267904] [2024-06-21 21:11:14,460 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:11:14,460 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-21 21:11:14,461 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:11:14,461 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-21 21:11:14,461 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2024-06-21 21:11:14,554 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 21:11:14,555 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 255 places, 197 transitions, 1520 flow. Second operand has 12 states, 12 states have (on average 7.333333333333333) internal successors, (88), 12 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:11:14,555 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:11:14,555 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 21:11:14,555 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:11:14,890 INFO L124 PetriNetUnfolderBase]: 584/1110 cut-off events. [2024-06-21 21:11:14,890 INFO L125 PetriNetUnfolderBase]: For 191902/191902 co-relation queries the response was YES. [2024-06-21 21:11:14,896 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7279 conditions, 1110 events. 584/1110 cut-off events. For 191902/191902 co-relation queries the response was YES. Maximal size of possible extension queue 108. Compared 5989 event pairs, 76 based on Foata normal form. 8/1116 useless extension candidates. Maximal degree in co-relation 7161. Up to 609 conditions per place. [2024-06-21 21:11:14,899 INFO L140 encePairwiseOnDemand]: 20/31 looper letters, 126 selfloop transitions, 87 changer transitions 16/231 dead transitions. [2024-06-21 21:11:14,899 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 258 places, 231 transitions, 2300 flow [2024-06-21 21:11:14,899 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 21:11:14,899 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 21:11:14,899 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 148 transitions. [2024-06-21 21:11:14,900 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4340175953079179 [2024-06-21 21:11:14,900 INFO L175 Difference]: Start difference. First operand has 255 places, 197 transitions, 1520 flow. Second operand 11 states and 148 transitions. [2024-06-21 21:11:14,900 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 258 places, 231 transitions, 2300 flow [2024-06-21 21:11:15,286 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 249 places, 231 transitions, 2180 flow, removed 8 selfloop flow, removed 9 redundant places. [2024-06-21 21:11:15,288 INFO L231 Difference]: Finished difference. Result has 250 places, 195 transitions, 1574 flow [2024-06-21 21:11:15,289 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1410, PETRI_DIFFERENCE_MINUEND_PLACES=239, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=197, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=85, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=112, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=1574, PETRI_PLACES=250, PETRI_TRANSITIONS=195} [2024-06-21 21:11:15,289 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 220 predicate places. [2024-06-21 21:11:15,289 INFO L495 AbstractCegarLoop]: Abstraction has has 250 places, 195 transitions, 1574 flow [2024-06-21 21:11:15,289 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 7.333333333333333) internal successors, (88), 12 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:11:15,289 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:11:15,289 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:11:15,289 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable104 [2024-06-21 21:11:15,290 INFO L420 AbstractCegarLoop]: === Iteration 106 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 21:11:15,290 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:11:15,290 INFO L85 PathProgramCache]: Analyzing trace with hash -953832806, now seen corresponding path program 3 times [2024-06-21 21:11:15,290 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:11:15,290 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1061884540] [2024-06-21 21:11:15,290 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:11:15,290 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:11:15,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:11:16,024 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:11:16,024 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:11:16,024 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1061884540] [2024-06-21 21:11:16,025 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1061884540] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:11:16,025 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:11:16,025 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-21 21:11:16,025 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [105218787] [2024-06-21 21:11:16,025 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:11:16,025 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-21 21:11:16,025 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:11:16,026 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-21 21:11:16,026 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2024-06-21 21:11:16,126 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 21:11:16,126 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 250 places, 195 transitions, 1574 flow. Second operand has 12 states, 12 states have (on average 7.333333333333333) internal successors, (88), 12 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:11:16,126 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:11:16,126 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 21:11:16,127 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:11:16,543 INFO L124 PetriNetUnfolderBase]: 583/1115 cut-off events. [2024-06-21 21:11:16,543 INFO L125 PetriNetUnfolderBase]: For 222880/222880 co-relation queries the response was YES. [2024-06-21 21:11:16,549 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7183 conditions, 1115 events. 583/1115 cut-off events. For 222880/222880 co-relation queries the response was YES. Maximal size of possible extension queue 106. Compared 6077 event pairs, 101 based on Foata normal form. 20/1133 useless extension candidates. Maximal degree in co-relation 7068. Up to 695 conditions per place. [2024-06-21 21:11:16,552 INFO L140 encePairwiseOnDemand]: 19/31 looper letters, 114 selfloop transitions, 91 changer transitions 18/225 dead transitions. [2024-06-21 21:11:16,552 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 258 places, 225 transitions, 2120 flow [2024-06-21 21:11:16,553 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-06-21 21:11:16,553 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2024-06-21 21:11:16,553 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 178 transitions. [2024-06-21 21:11:16,553 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3827956989247312 [2024-06-21 21:11:16,553 INFO L175 Difference]: Start difference. First operand has 250 places, 195 transitions, 1574 flow. Second operand 15 states and 178 transitions. [2024-06-21 21:11:16,553 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 258 places, 225 transitions, 2120 flow [2024-06-21 21:11:16,834 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 250 places, 225 transitions, 2013 flow, removed 4 selfloop flow, removed 8 redundant places. [2024-06-21 21:11:16,836 INFO L231 Difference]: Finished difference. Result has 251 places, 187 transitions, 1601 flow [2024-06-21 21:11:16,837 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1467, PETRI_DIFFERENCE_MINUEND_PLACES=236, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=195, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=91, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=104, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=1601, PETRI_PLACES=251, PETRI_TRANSITIONS=187} [2024-06-21 21:11:16,837 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 221 predicate places. [2024-06-21 21:11:16,837 INFO L495 AbstractCegarLoop]: Abstraction has has 251 places, 187 transitions, 1601 flow [2024-06-21 21:11:16,837 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 7.333333333333333) internal successors, (88), 12 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:11:16,837 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:11:16,837 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:11:16,837 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable105 [2024-06-21 21:11:16,838 INFO L420 AbstractCegarLoop]: === Iteration 107 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 21:11:16,838 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:11:16,838 INFO L85 PathProgramCache]: Analyzing trace with hash -953838386, now seen corresponding path program 4 times [2024-06-21 21:11:16,838 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:11:16,838 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [796083551] [2024-06-21 21:11:16,838 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:11:16,838 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:11:16,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:11:17,682 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:11:17,682 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:11:17,683 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [796083551] [2024-06-21 21:11:17,683 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [796083551] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:11:17,683 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:11:17,683 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-21 21:11:17,683 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [284935781] [2024-06-21 21:11:17,684 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:11:17,685 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-21 21:11:17,685 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:11:17,685 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-21 21:11:17,685 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2024-06-21 21:11:17,772 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 21:11:17,772 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 251 places, 187 transitions, 1601 flow. Second operand has 12 states, 12 states have (on average 7.333333333333333) internal successors, (88), 12 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:11:17,772 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:11:17,772 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 21:11:17,772 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:11:18,081 INFO L124 PetriNetUnfolderBase]: 531/1019 cut-off events. [2024-06-21 21:11:18,081 INFO L125 PetriNetUnfolderBase]: For 160372/160372 co-relation queries the response was YES. [2024-06-21 21:11:18,086 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6811 conditions, 1019 events. 531/1019 cut-off events. For 160372/160372 co-relation queries the response was YES. Maximal size of possible extension queue 101. Compared 5401 event pairs, 79 based on Foata normal form. 8/1025 useless extension candidates. Maximal degree in co-relation 6699. Up to 643 conditions per place. [2024-06-21 21:11:18,088 INFO L140 encePairwiseOnDemand]: 20/31 looper letters, 112 selfloop transitions, 84 changer transitions 14/212 dead transitions. [2024-06-21 21:11:18,089 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 260 places, 212 transitions, 2097 flow [2024-06-21 21:11:18,089 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-21 21:11:18,089 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-21 21:11:18,089 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 143 transitions. [2024-06-21 21:11:18,089 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3844086021505376 [2024-06-21 21:11:18,090 INFO L175 Difference]: Start difference. First operand has 251 places, 187 transitions, 1601 flow. Second operand 12 states and 143 transitions. [2024-06-21 21:11:18,090 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 260 places, 212 transitions, 2097 flow [2024-06-21 21:11:18,369 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 245 places, 212 transitions, 1848 flow, removed 1 selfloop flow, removed 15 redundant places. [2024-06-21 21:11:18,371 INFO L231 Difference]: Finished difference. Result has 246 places, 184 transitions, 1502 flow [2024-06-21 21:11:18,372 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1352, PETRI_DIFFERENCE_MINUEND_PLACES=234, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=187, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=84, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=103, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=1502, PETRI_PLACES=246, PETRI_TRANSITIONS=184} [2024-06-21 21:11:18,386 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 216 predicate places. [2024-06-21 21:11:18,387 INFO L495 AbstractCegarLoop]: Abstraction has has 246 places, 184 transitions, 1502 flow [2024-06-21 21:11:18,387 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 7.333333333333333) internal successors, (88), 12 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:11:18,387 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:11:18,387 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:11:18,387 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable106 [2024-06-21 21:11:18,387 INFO L420 AbstractCegarLoop]: === Iteration 108 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 21:11:18,387 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:11:18,388 INFO L85 PathProgramCache]: Analyzing trace with hash 58925850, now seen corresponding path program 5 times [2024-06-21 21:11:18,388 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:11:18,388 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [158488052] [2024-06-21 21:11:18,388 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:11:18,388 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:11:18,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:11:19,162 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:11:19,163 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:11:19,163 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [158488052] [2024-06-21 21:11:19,163 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [158488052] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:11:19,163 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:11:19,163 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-21 21:11:19,163 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [757619536] [2024-06-21 21:11:19,163 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:11:19,163 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-21 21:11:19,164 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:11:19,164 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-21 21:11:19,164 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2024-06-21 21:11:19,262 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 21:11:19,262 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 246 places, 184 transitions, 1502 flow. Second operand has 12 states, 12 states have (on average 7.333333333333333) internal successors, (88), 12 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:11:19,262 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:11:19,262 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 21:11:19,262 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:11:19,628 INFO L124 PetriNetUnfolderBase]: 502/960 cut-off events. [2024-06-21 21:11:19,628 INFO L125 PetriNetUnfolderBase]: For 128402/128402 co-relation queries the response was YES. [2024-06-21 21:11:19,634 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5848 conditions, 960 events. 502/960 cut-off events. For 128402/128402 co-relation queries the response was YES. Maximal size of possible extension queue 98. Compared 5028 event pairs, 61 based on Foata normal form. 8/966 useless extension candidates. Maximal degree in co-relation 5736. Up to 579 conditions per place. [2024-06-21 21:11:19,637 INFO L140 encePairwiseOnDemand]: 20/31 looper letters, 105 selfloop transitions, 80 changer transitions 22/209 dead transitions. [2024-06-21 21:11:19,637 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 251 places, 209 transitions, 1992 flow [2024-06-21 21:11:19,638 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 21:11:19,638 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 21:11:19,638 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 135 transitions. [2024-06-21 21:11:19,638 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39589442815249265 [2024-06-21 21:11:19,638 INFO L175 Difference]: Start difference. First operand has 246 places, 184 transitions, 1502 flow. Second operand 11 states and 135 transitions. [2024-06-21 21:11:19,638 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 251 places, 209 transitions, 1992 flow [2024-06-21 21:11:19,884 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 240 places, 209 transitions, 1818 flow, removed 3 selfloop flow, removed 11 redundant places. [2024-06-21 21:11:19,886 INFO L231 Difference]: Finished difference. Result has 241 places, 179 transitions, 1458 flow [2024-06-21 21:11:19,886 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1328, PETRI_DIFFERENCE_MINUEND_PLACES=230, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=184, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=80, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=104, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=1458, PETRI_PLACES=241, PETRI_TRANSITIONS=179} [2024-06-21 21:11:19,887 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 211 predicate places. [2024-06-21 21:11:19,887 INFO L495 AbstractCegarLoop]: Abstraction has has 241 places, 179 transitions, 1458 flow [2024-06-21 21:11:19,887 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 7.333333333333333) internal successors, (88), 12 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:11:19,887 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:11:19,887 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:11:19,887 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable107 [2024-06-21 21:11:19,887 INFO L420 AbstractCegarLoop]: === Iteration 109 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 21:11:19,887 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:11:19,888 INFO L85 PathProgramCache]: Analyzing trace with hash -656508646, now seen corresponding path program 6 times [2024-06-21 21:11:19,888 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:11:19,888 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1508700854] [2024-06-21 21:11:19,888 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:11:19,888 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:11:19,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:11:20,627 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:11:20,628 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:11:20,628 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1508700854] [2024-06-21 21:11:20,628 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1508700854] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:11:20,628 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:11:20,628 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-21 21:11:20,628 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [116889996] [2024-06-21 21:11:20,628 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:11:20,629 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-21 21:11:20,629 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:11:20,629 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-21 21:11:20,629 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2024-06-21 21:11:20,714 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 21:11:20,714 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 241 places, 179 transitions, 1458 flow. Second operand has 12 states, 12 states have (on average 7.333333333333333) internal successors, (88), 12 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:11:20,714 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:11:20,714 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 21:11:20,714 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:11:20,994 INFO L124 PetriNetUnfolderBase]: 490/936 cut-off events. [2024-06-21 21:11:20,995 INFO L125 PetriNetUnfolderBase]: For 122758/122758 co-relation queries the response was YES. [2024-06-21 21:11:20,999 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5710 conditions, 936 events. 490/936 cut-off events. For 122758/122758 co-relation queries the response was YES. Maximal size of possible extension queue 95. Compared 4845 event pairs, 61 based on Foata normal form. 8/942 useless extension candidates. Maximal degree in co-relation 5600. Up to 722 conditions per place. [2024-06-21 21:11:21,001 INFO L140 encePairwiseOnDemand]: 19/31 looper letters, 145 selfloop transitions, 39 changer transitions 14/200 dead transitions. [2024-06-21 21:11:21,001 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 241 places, 200 transitions, 1918 flow [2024-06-21 21:11:21,002 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 21:11:21,002 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 21:11:21,002 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 133 transitions. [2024-06-21 21:11:21,002 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39002932551319647 [2024-06-21 21:11:21,002 INFO L175 Difference]: Start difference. First operand has 241 places, 179 transitions, 1458 flow. Second operand 11 states and 133 transitions. [2024-06-21 21:11:21,003 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 241 places, 200 transitions, 1918 flow [2024-06-21 21:11:21,204 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 233 places, 200 transitions, 1752 flow, removed 3 selfloop flow, removed 8 redundant places. [2024-06-21 21:11:21,206 INFO L231 Difference]: Finished difference. Result has 234 places, 176 transitions, 1347 flow [2024-06-21 21:11:21,207 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1292, PETRI_DIFFERENCE_MINUEND_PLACES=223, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=179, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=140, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=1347, PETRI_PLACES=234, PETRI_TRANSITIONS=176} [2024-06-21 21:11:21,207 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 204 predicate places. [2024-06-21 21:11:21,207 INFO L495 AbstractCegarLoop]: Abstraction has has 234 places, 176 transitions, 1347 flow [2024-06-21 21:11:21,207 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 7.333333333333333) internal successors, (88), 12 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:11:21,207 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:11:21,207 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:11:21,207 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable108 [2024-06-21 21:11:21,208 INFO L420 AbstractCegarLoop]: === Iteration 110 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 21:11:21,208 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:11:21,208 INFO L85 PathProgramCache]: Analyzing trace with hash -662015176, now seen corresponding path program 7 times [2024-06-21 21:11:21,208 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:11:21,208 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [334520305] [2024-06-21 21:11:21,208 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:11:21,208 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:11:21,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:11:21,990 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:11:21,991 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:11:21,991 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [334520305] [2024-06-21 21:11:21,991 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [334520305] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:11:21,991 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:11:21,991 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-21 21:11:21,991 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1991610859] [2024-06-21 21:11:21,991 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:11:21,992 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-21 21:11:21,992 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:11:21,992 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-21 21:11:21,992 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2024-06-21 21:11:22,118 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 21:11:22,119 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 234 places, 176 transitions, 1347 flow. Second operand has 12 states, 12 states have (on average 7.333333333333333) internal successors, (88), 12 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:11:22,119 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:11:22,119 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 21:11:22,119 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:11:22,497 INFO L124 PetriNetUnfolderBase]: 509/977 cut-off events. [2024-06-21 21:11:22,497 INFO L125 PetriNetUnfolderBase]: For 146329/146329 co-relation queries the response was YES. [2024-06-21 21:11:22,503 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6347 conditions, 977 events. 509/977 cut-off events. For 146329/146329 co-relation queries the response was YES. Maximal size of possible extension queue 96. Compared 5121 event pairs, 87 based on Foata normal form. 8/983 useless extension candidates. Maximal degree in co-relation 6239. Up to 706 conditions per place. [2024-06-21 21:11:22,505 INFO L140 encePairwiseOnDemand]: 19/31 looper letters, 151 selfloop transitions, 36 changer transitions 13/202 dead transitions. [2024-06-21 21:11:22,505 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 239 places, 202 transitions, 2012 flow [2024-06-21 21:11:22,506 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 21:11:22,506 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 21:11:22,506 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 138 transitions. [2024-06-21 21:11:22,506 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4046920821114369 [2024-06-21 21:11:22,506 INFO L175 Difference]: Start difference. First operand has 234 places, 176 transitions, 1347 flow. Second operand 11 states and 138 transitions. [2024-06-21 21:11:22,506 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 239 places, 202 transitions, 2012 flow [2024-06-21 21:11:22,746 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 230 places, 202 transitions, 1928 flow, removed 3 selfloop flow, removed 9 redundant places. [2024-06-21 21:11:22,748 INFO L231 Difference]: Finished difference. Result has 232 places, 174 transitions, 1327 flow [2024-06-21 21:11:22,748 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1265, PETRI_DIFFERENCE_MINUEND_PLACES=220, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=176, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=140, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=1327, PETRI_PLACES=232, PETRI_TRANSITIONS=174} [2024-06-21 21:11:22,749 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 202 predicate places. [2024-06-21 21:11:22,749 INFO L495 AbstractCegarLoop]: Abstraction has has 232 places, 174 transitions, 1327 flow [2024-06-21 21:11:22,749 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 7.333333333333333) internal successors, (88), 12 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:11:22,749 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:11:22,749 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:11:22,749 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable109 [2024-06-21 21:11:22,749 INFO L420 AbstractCegarLoop]: === Iteration 111 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 21:11:22,750 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:11:22,750 INFO L85 PathProgramCache]: Analyzing trace with hash -425016754, now seen corresponding path program 8 times [2024-06-21 21:11:22,750 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:11:22,750 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1210462940] [2024-06-21 21:11:22,750 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:11:22,750 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:11:22,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:11:23,454 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:11:23,454 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:11:23,454 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1210462940] [2024-06-21 21:11:23,454 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1210462940] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:11:23,455 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:11:23,455 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-21 21:11:23,455 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1632860669] [2024-06-21 21:11:23,455 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:11:23,455 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-21 21:11:23,455 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:11:23,455 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-21 21:11:23,456 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2024-06-21 21:11:23,560 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 21:11:23,560 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 232 places, 174 transitions, 1327 flow. Second operand has 12 states, 12 states have (on average 7.333333333333333) internal successors, (88), 12 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:11:23,560 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:11:23,561 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 21:11:23,561 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:11:23,883 INFO L124 PetriNetUnfolderBase]: 477/913 cut-off events. [2024-06-21 21:11:23,883 INFO L125 PetriNetUnfolderBase]: For 117076/117076 co-relation queries the response was YES. [2024-06-21 21:11:23,888 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5451 conditions, 913 events. 477/913 cut-off events. For 117076/117076 co-relation queries the response was YES. Maximal size of possible extension queue 92. Compared 4685 event pairs, 61 based on Foata normal form. 8/919 useless extension candidates. Maximal degree in co-relation 5343. Up to 696 conditions per place. [2024-06-21 21:11:23,890 INFO L140 encePairwiseOnDemand]: 19/31 looper letters, 140 selfloop transitions, 37 changer transitions 16/195 dead transitions. [2024-06-21 21:11:23,890 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 239 places, 195 transitions, 1777 flow [2024-06-21 21:11:23,890 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 21:11:23,890 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 21:11:23,890 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 132 transitions. [2024-06-21 21:11:23,891 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3870967741935484 [2024-06-21 21:11:23,891 INFO L175 Difference]: Start difference. First operand has 232 places, 174 transitions, 1327 flow. Second operand 11 states and 132 transitions. [2024-06-21 21:11:23,891 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 239 places, 195 transitions, 1777 flow [2024-06-21 21:11:24,084 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 228 places, 195 transitions, 1699 flow, removed 3 selfloop flow, removed 11 redundant places. [2024-06-21 21:11:24,086 INFO L231 Difference]: Finished difference. Result has 229 places, 170 transitions, 1295 flow [2024-06-21 21:11:24,086 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1249, PETRI_DIFFERENCE_MINUEND_PLACES=218, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=174, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=137, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=1295, PETRI_PLACES=229, PETRI_TRANSITIONS=170} [2024-06-21 21:11:24,087 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 199 predicate places. [2024-06-21 21:11:24,087 INFO L495 AbstractCegarLoop]: Abstraction has has 229 places, 170 transitions, 1295 flow [2024-06-21 21:11:24,087 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 7.333333333333333) internal successors, (88), 12 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:11:24,087 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:11:24,087 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:11:24,087 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable110 [2024-06-21 21:11:24,087 INFO L420 AbstractCegarLoop]: === Iteration 112 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 21:11:24,088 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:11:24,088 INFO L85 PathProgramCache]: Analyzing trace with hash 748893330, now seen corresponding path program 9 times [2024-06-21 21:11:24,088 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:11:24,088 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [428615928] [2024-06-21 21:11:24,088 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:11:24,088 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:11:24,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:11:24,929 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:11:24,929 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:11:24,929 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [428615928] [2024-06-21 21:11:24,929 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [428615928] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:11:24,929 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:11:24,929 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-21 21:11:24,929 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [298409339] [2024-06-21 21:11:24,930 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:11:24,930 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-21 21:11:24,930 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:11:24,930 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-21 21:11:24,930 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2024-06-21 21:11:25,024 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 21:11:25,024 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 229 places, 170 transitions, 1295 flow. Second operand has 12 states, 12 states have (on average 7.333333333333333) internal successors, (88), 12 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:11:25,024 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:11:25,024 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 21:11:25,024 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:11:25,345 INFO L124 PetriNetUnfolderBase]: 491/943 cut-off events. [2024-06-21 21:11:25,345 INFO L125 PetriNetUnfolderBase]: For 142719/142719 co-relation queries the response was YES. [2024-06-21 21:11:25,349 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6183 conditions, 943 events. 491/943 cut-off events. For 142719/142719 co-relation queries the response was YES. Maximal size of possible extension queue 92. Compared 4856 event pairs, 75 based on Foata normal form. 8/949 useless extension candidates. Maximal degree in co-relation 6077. Up to 633 conditions per place. [2024-06-21 21:11:25,351 INFO L140 encePairwiseOnDemand]: 19/31 looper letters, 141 selfloop transitions, 38 changer transitions 16/197 dead transitions. [2024-06-21 21:11:25,352 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 232 places, 197 transitions, 1947 flow [2024-06-21 21:11:25,352 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 21:11:25,352 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 21:11:25,352 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 141 transitions. [2024-06-21 21:11:25,352 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41348973607038125 [2024-06-21 21:11:25,353 INFO L175 Difference]: Start difference. First operand has 229 places, 170 transitions, 1295 flow. Second operand 11 states and 141 transitions. [2024-06-21 21:11:25,353 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 232 places, 197 transitions, 1947 flow [2024-06-21 21:11:25,548 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 223 places, 197 transitions, 1855 flow, removed 9 selfloop flow, removed 9 redundant places. [2024-06-21 21:11:25,550 INFO L231 Difference]: Finished difference. Result has 224 places, 166 transitions, 1265 flow [2024-06-21 21:11:25,550 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1211, PETRI_DIFFERENCE_MINUEND_PLACES=213, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=170, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=132, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=1265, PETRI_PLACES=224, PETRI_TRANSITIONS=166} [2024-06-21 21:11:25,551 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 194 predicate places. [2024-06-21 21:11:25,551 INFO L495 AbstractCegarLoop]: Abstraction has has 224 places, 166 transitions, 1265 flow [2024-06-21 21:11:25,551 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 7.333333333333333) internal successors, (88), 12 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:11:25,551 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:11:25,551 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:11:25,551 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable111 [2024-06-21 21:11:25,551 INFO L420 AbstractCegarLoop]: === Iteration 113 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 21:11:25,551 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:11:25,552 INFO L85 PathProgramCache]: Analyzing trace with hash 752612400, now seen corresponding path program 10 times [2024-06-21 21:11:25,552 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:11:25,552 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1395748701] [2024-06-21 21:11:25,552 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:11:25,552 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:11:25,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:11:26,335 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:11:26,335 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:11:26,335 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1395748701] [2024-06-21 21:11:26,336 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1395748701] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:11:26,336 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:11:26,336 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-21 21:11:26,336 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2006550860] [2024-06-21 21:11:26,336 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:11:26,336 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-21 21:11:26,336 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:11:26,337 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-21 21:11:26,337 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2024-06-21 21:11:26,470 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 21:11:26,471 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 224 places, 166 transitions, 1265 flow. Second operand has 12 states, 12 states have (on average 7.333333333333333) internal successors, (88), 12 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:11:26,471 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:11:26,471 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 21:11:26,471 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:11:26,794 INFO L124 PetriNetUnfolderBase]: 477/917 cut-off events. [2024-06-21 21:11:26,794 INFO L125 PetriNetUnfolderBase]: For 139854/139854 co-relation queries the response was YES. [2024-06-21 21:11:26,798 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6033 conditions, 917 events. 477/917 cut-off events. For 139854/139854 co-relation queries the response was YES. Maximal size of possible extension queue 89. Compared 4701 event pairs, 73 based on Foata normal form. 8/923 useless extension candidates. Maximal degree in co-relation 5929. Up to 697 conditions per place. [2024-06-21 21:11:26,800 INFO L140 encePairwiseOnDemand]: 19/31 looper letters, 133 selfloop transitions, 39 changer transitions 14/188 dead transitions. [2024-06-21 21:11:26,801 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 229 places, 188 transitions, 1701 flow [2024-06-21 21:11:26,801 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-21 21:11:26,801 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-21 21:11:26,801 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 140 transitions. [2024-06-21 21:11:26,801 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3763440860215054 [2024-06-21 21:11:26,801 INFO L175 Difference]: Start difference. First operand has 224 places, 166 transitions, 1265 flow. Second operand 12 states and 140 transitions. [2024-06-21 21:11:26,802 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 229 places, 188 transitions, 1701 flow [2024-06-21 21:11:26,960 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 219 places, 188 transitions, 1619 flow, removed 4 selfloop flow, removed 10 redundant places. [2024-06-21 21:11:26,962 INFO L231 Difference]: Finished difference. Result has 220 places, 163 transitions, 1243 flow [2024-06-21 21:11:26,963 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1183, PETRI_DIFFERENCE_MINUEND_PLACES=208, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=166, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=127, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=1243, PETRI_PLACES=220, PETRI_TRANSITIONS=163} [2024-06-21 21:11:26,963 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 190 predicate places. [2024-06-21 21:11:26,963 INFO L495 AbstractCegarLoop]: Abstraction has has 220 places, 163 transitions, 1243 flow [2024-06-21 21:11:26,963 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 7.333333333333333) internal successors, (88), 12 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:11:26,963 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:11:26,964 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:11:26,964 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable112 [2024-06-21 21:11:26,964 INFO L420 AbstractCegarLoop]: === Iteration 114 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 21:11:26,964 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:11:26,964 INFO L85 PathProgramCache]: Analyzing trace with hash -563689054, now seen corresponding path program 11 times [2024-06-21 21:11:26,964 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:11:26,964 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1991723975] [2024-06-21 21:11:26,964 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:11:26,965 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:11:26,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:11:27,744 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:11:27,744 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:11:27,744 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1991723975] [2024-06-21 21:11:27,744 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1991723975] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:11:27,744 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:11:27,744 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-21 21:11:27,744 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1482633489] [2024-06-21 21:11:27,745 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:11:27,745 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-21 21:11:27,745 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:11:27,745 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-21 21:11:27,745 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2024-06-21 21:11:27,860 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 21:11:27,860 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 220 places, 163 transitions, 1243 flow. Second operand has 12 states, 12 states have (on average 7.333333333333333) internal successors, (88), 12 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:11:27,860 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:11:27,860 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 21:11:27,860 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:11:28,190 INFO L124 PetriNetUnfolderBase]: 448/858 cut-off events. [2024-06-21 21:11:28,191 INFO L125 PetriNetUnfolderBase]: For 104334/104334 co-relation queries the response was YES. [2024-06-21 21:11:28,194 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5112 conditions, 858 events. 448/858 cut-off events. For 104334/104334 co-relation queries the response was YES. Maximal size of possible extension queue 85. Compared 4325 event pairs, 63 based on Foata normal form. 8/864 useless extension candidates. Maximal degree in co-relation 5011. Up to 643 conditions per place. [2024-06-21 21:11:28,196 INFO L140 encePairwiseOnDemand]: 19/31 looper letters, 132 selfloop transitions, 32 changer transitions 20/186 dead transitions. [2024-06-21 21:11:28,196 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 227 places, 186 transitions, 1677 flow [2024-06-21 21:11:28,196 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-21 21:11:28,197 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-21 21:11:28,197 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 140 transitions. [2024-06-21 21:11:28,197 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3763440860215054 [2024-06-21 21:11:28,197 INFO L175 Difference]: Start difference. First operand has 220 places, 163 transitions, 1243 flow. Second operand 12 states and 140 transitions. [2024-06-21 21:11:28,197 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 227 places, 186 transitions, 1677 flow [2024-06-21 21:11:28,339 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 213 places, 186 transitions, 1541 flow, removed 3 selfloop flow, removed 14 redundant places. [2024-06-21 21:11:28,341 INFO L231 Difference]: Finished difference. Result has 214 places, 156 transitions, 1133 flow [2024-06-21 21:11:28,341 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1107, PETRI_DIFFERENCE_MINUEND_PLACES=202, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=163, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=131, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=1133, PETRI_PLACES=214, PETRI_TRANSITIONS=156} [2024-06-21 21:11:28,341 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 184 predicate places. [2024-06-21 21:11:28,341 INFO L495 AbstractCegarLoop]: Abstraction has has 214 places, 156 transitions, 1133 flow [2024-06-21 21:11:28,341 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 7.333333333333333) internal successors, (88), 12 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:11:28,341 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:11:28,341 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:11:28,342 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable113 [2024-06-21 21:11:28,342 INFO L420 AbstractCegarLoop]: === Iteration 115 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 21:11:28,342 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:11:28,342 INFO L85 PathProgramCache]: Analyzing trace with hash -2138709576, now seen corresponding path program 12 times [2024-06-21 21:11:28,342 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:11:28,342 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2071823716] [2024-06-21 21:11:28,342 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:11:28,342 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:11:28,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:11:29,049 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:11:29,049 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:11:29,049 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2071823716] [2024-06-21 21:11:29,049 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2071823716] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:11:29,049 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:11:29,049 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-21 21:11:29,049 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1747797064] [2024-06-21 21:11:29,049 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:11:29,050 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-21 21:11:29,050 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:11:29,050 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-21 21:11:29,050 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2024-06-21 21:11:29,145 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 21:11:29,145 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 214 places, 156 transitions, 1133 flow. Second operand has 12 states, 12 states have (on average 7.333333333333333) internal successors, (88), 12 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:11:29,145 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:11:29,145 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 21:11:29,145 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:11:29,476 INFO L124 PetriNetUnfolderBase]: 435/823 cut-off events. [2024-06-21 21:11:29,476 INFO L125 PetriNetUnfolderBase]: For 123727/123727 co-relation queries the response was YES. [2024-06-21 21:11:29,479 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5481 conditions, 823 events. 435/823 cut-off events. For 123727/123727 co-relation queries the response was YES. Maximal size of possible extension queue 81. Compared 4076 event pairs, 75 based on Foata normal form. 8/829 useless extension candidates. Maximal degree in co-relation 5382. Up to 302 conditions per place. [2024-06-21 21:11:29,481 INFO L140 encePairwiseOnDemand]: 20/31 looper letters, 93 selfloop transitions, 74 changer transitions 13/182 dead transitions. [2024-06-21 21:11:29,481 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 215 places, 182 transitions, 1747 flow [2024-06-21 21:11:29,482 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 21:11:29,482 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 21:11:29,482 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 136 transitions. [2024-06-21 21:11:29,482 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39882697947214074 [2024-06-21 21:11:29,482 INFO L175 Difference]: Start difference. First operand has 214 places, 156 transitions, 1133 flow. Second operand 11 states and 136 transitions. [2024-06-21 21:11:29,482 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 215 places, 182 transitions, 1747 flow [2024-06-21 21:11:29,635 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 201 places, 182 transitions, 1631 flow, removed 10 selfloop flow, removed 14 redundant places. [2024-06-21 21:11:29,637 INFO L231 Difference]: Finished difference. Result has 202 places, 152 transitions, 1157 flow [2024-06-21 21:11:29,637 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1027, PETRI_DIFFERENCE_MINUEND_PLACES=191, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=156, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=74, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=82, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=1157, PETRI_PLACES=202, PETRI_TRANSITIONS=152} [2024-06-21 21:11:29,637 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 172 predicate places. [2024-06-21 21:11:29,637 INFO L495 AbstractCegarLoop]: Abstraction has has 202 places, 152 transitions, 1157 flow [2024-06-21 21:11:29,637 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 7.333333333333333) internal successors, (88), 12 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:11:29,637 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:11:29,637 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:11:29,638 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable114 [2024-06-21 21:11:29,638 INFO L420 AbstractCegarLoop]: === Iteration 116 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 21:11:29,638 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:11:29,638 INFO L85 PathProgramCache]: Analyzing trace with hash -438088400, now seen corresponding path program 13 times [2024-06-21 21:11:29,638 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:11:29,638 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [995583156] [2024-06-21 21:11:29,638 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:11:29,639 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:11:29,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:11:30,490 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:11:30,491 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:11:30,491 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [995583156] [2024-06-21 21:11:30,491 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [995583156] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:11:30,491 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:11:30,491 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-21 21:11:30,491 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [661465052] [2024-06-21 21:11:30,491 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:11:30,493 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-21 21:11:30,493 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:11:30,493 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-21 21:11:30,493 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2024-06-21 21:11:30,598 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 21:11:30,599 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 202 places, 152 transitions, 1157 flow. Second operand has 12 states, 12 states have (on average 7.333333333333333) internal successors, (88), 12 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:11:30,599 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:11:30,599 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 21:11:30,599 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:11:30,969 INFO L124 PetriNetUnfolderBase]: 450/856 cut-off events. [2024-06-21 21:11:30,969 INFO L125 PetriNetUnfolderBase]: For 139389/139389 co-relation queries the response was YES. [2024-06-21 21:11:30,972 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6294 conditions, 856 events. 450/856 cut-off events. For 139389/139389 co-relation queries the response was YES. Maximal size of possible extension queue 79. Compared 4303 event pairs, 88 based on Foata normal form. 8/862 useless extension candidates. Maximal degree in co-relation 6199. Up to 617 conditions per place. [2024-06-21 21:11:30,975 INFO L140 encePairwiseOnDemand]: 20/31 looper letters, 126 selfloop transitions, 40 changer transitions 7/175 dead transitions. [2024-06-21 21:11:30,975 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 206 places, 175 transitions, 1737 flow [2024-06-21 21:11:30,975 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 21:11:30,975 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 21:11:30,975 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 133 transitions. [2024-06-21 21:11:30,976 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39002932551319647 [2024-06-21 21:11:30,976 INFO L175 Difference]: Start difference. First operand has 202 places, 152 transitions, 1157 flow. Second operand 11 states and 133 transitions. [2024-06-21 21:11:30,976 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 206 places, 175 transitions, 1737 flow [2024-06-21 21:11:31,144 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 196 places, 175 transitions, 1613 flow, removed 8 selfloop flow, removed 10 redundant places. [2024-06-21 21:11:31,146 INFO L231 Difference]: Finished difference. Result has 197 places, 150 transitions, 1106 flow [2024-06-21 21:11:31,146 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1041, PETRI_DIFFERENCE_MINUEND_PLACES=186, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=152, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=112, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=1106, PETRI_PLACES=197, PETRI_TRANSITIONS=150} [2024-06-21 21:11:31,146 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 167 predicate places. [2024-06-21 21:11:31,146 INFO L495 AbstractCegarLoop]: Abstraction has has 197 places, 150 transitions, 1106 flow [2024-06-21 21:11:31,146 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 7.333333333333333) internal successors, (88), 12 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:11:31,147 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:11:31,147 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:11:31,147 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable115 [2024-06-21 21:11:31,147 INFO L420 AbstractCegarLoop]: === Iteration 117 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 21:11:31,147 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:11:31,147 INFO L85 PathProgramCache]: Analyzing trace with hash 614136474, now seen corresponding path program 14 times [2024-06-21 21:11:31,147 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:11:31,147 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [979166588] [2024-06-21 21:11:31,148 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:11:31,148 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:11:31,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:11:31,937 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:11:31,937 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:11:31,938 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [979166588] [2024-06-21 21:11:31,938 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [979166588] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:11:31,938 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:11:31,938 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-21 21:11:31,938 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [395079350] [2024-06-21 21:11:31,938 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:11:31,938 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-21 21:11:31,938 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:11:31,939 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-21 21:11:31,939 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2024-06-21 21:11:32,020 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 21:11:32,021 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 197 places, 150 transitions, 1106 flow. Second operand has 12 states, 12 states have (on average 7.333333333333333) internal successors, (88), 12 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:11:32,021 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:11:32,021 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 21:11:32,021 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:11:32,328 INFO L124 PetriNetUnfolderBase]: 448/854 cut-off events. [2024-06-21 21:11:32,329 INFO L125 PetriNetUnfolderBase]: For 133533/133533 co-relation queries the response was YES. [2024-06-21 21:11:32,332 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6169 conditions, 854 events. 448/854 cut-off events. For 133533/133533 co-relation queries the response was YES. Maximal size of possible extension queue 77. Compared 4299 event pairs, 88 based on Foata normal form. 10/862 useless extension candidates. Maximal degree in co-relation 6077. Up to 654 conditions per place. [2024-06-21 21:11:32,334 INFO L140 encePairwiseOnDemand]: 20/31 looper letters, 116 selfloop transitions, 41 changer transitions 11/170 dead transitions. [2024-06-21 21:11:32,334 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 206 places, 170 transitions, 1506 flow [2024-06-21 21:11:32,334 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-21 21:11:32,334 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-21 21:11:32,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 139 transitions. [2024-06-21 21:11:32,335 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3736559139784946 [2024-06-21 21:11:32,335 INFO L175 Difference]: Start difference. First operand has 197 places, 150 transitions, 1106 flow. Second operand 12 states and 139 transitions. [2024-06-21 21:11:32,335 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 206 places, 170 transitions, 1506 flow [2024-06-21 21:11:32,505 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 196 places, 170 transitions, 1424 flow, removed 2 selfloop flow, removed 10 redundant places. [2024-06-21 21:11:32,507 INFO L231 Difference]: Finished difference. Result has 197 places, 147 transitions, 1087 flow [2024-06-21 21:11:32,507 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1024, PETRI_DIFFERENCE_MINUEND_PLACES=185, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=150, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=109, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=1087, PETRI_PLACES=197, PETRI_TRANSITIONS=147} [2024-06-21 21:11:32,507 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 167 predicate places. [2024-06-21 21:11:32,507 INFO L495 AbstractCegarLoop]: Abstraction has has 197 places, 147 transitions, 1087 flow [2024-06-21 21:11:32,507 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 7.333333333333333) internal successors, (88), 12 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:11:32,507 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:11:32,507 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:11:32,508 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable116 [2024-06-21 21:11:32,508 INFO L420 AbstractCegarLoop]: === Iteration 118 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 21:11:32,508 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:11:32,508 INFO L85 PathProgramCache]: Analyzing trace with hash 120299274, now seen corresponding path program 1 times [2024-06-21 21:11:32,508 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:11:32,508 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [960262516] [2024-06-21 21:11:32,509 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:11:32,509 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:11:32,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:11:33,460 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:11:33,461 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:11:33,461 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [960262516] [2024-06-21 21:11:33,461 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [960262516] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:11:33,461 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:11:33,461 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-21 21:11:33,461 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1538821492] [2024-06-21 21:11:33,461 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:11:33,462 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-21 21:11:33,462 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:11:33,462 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-21 21:11:33,462 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2024-06-21 21:11:33,534 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 21:11:33,534 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 197 places, 147 transitions, 1087 flow. Second operand has 12 states, 12 states have (on average 7.333333333333333) internal successors, (88), 12 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:11:33,534 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:11:33,534 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 21:11:33,534 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:11:33,765 INFO L124 PetriNetUnfolderBase]: 434/824 cut-off events. [2024-06-21 21:11:33,765 INFO L125 PetriNetUnfolderBase]: For 113232/113232 co-relation queries the response was YES. [2024-06-21 21:11:33,769 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6066 conditions, 824 events. 434/824 cut-off events. For 113232/113232 co-relation queries the response was YES. Maximal size of possible extension queue 76. Compared 4068 event pairs, 83 based on Foata normal form. 2/824 useless extension candidates. Maximal degree in co-relation 5975. Up to 656 conditions per place. [2024-06-21 21:11:33,771 INFO L140 encePairwiseOnDemand]: 20/31 looper letters, 123 selfloop transitions, 42 changer transitions 0/167 dead transitions. [2024-06-21 21:11:33,771 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 203 places, 167 transitions, 1490 flow [2024-06-21 21:11:33,771 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 21:11:33,771 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 21:11:33,772 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 116 transitions. [2024-06-21 21:11:33,772 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3741935483870968 [2024-06-21 21:11:33,772 INFO L175 Difference]: Start difference. First operand has 197 places, 147 transitions, 1087 flow. Second operand 10 states and 116 transitions. [2024-06-21 21:11:33,772 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 203 places, 167 transitions, 1490 flow [2024-06-21 21:11:33,938 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 192 places, 167 transitions, 1396 flow, removed 2 selfloop flow, removed 11 redundant places. [2024-06-21 21:11:33,939 INFO L231 Difference]: Finished difference. Result has 195 places, 153 transitions, 1165 flow [2024-06-21 21:11:33,939 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1001, PETRI_DIFFERENCE_MINUEND_PLACES=183, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=147, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=105, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1165, PETRI_PLACES=195, PETRI_TRANSITIONS=153} [2024-06-21 21:11:33,940 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 165 predicate places. [2024-06-21 21:11:33,940 INFO L495 AbstractCegarLoop]: Abstraction has has 195 places, 153 transitions, 1165 flow [2024-06-21 21:11:33,940 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 7.333333333333333) internal successors, (88), 12 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:11:33,940 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:11:33,940 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:11:33,940 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable117 [2024-06-21 21:11:33,940 INFO L420 AbstractCegarLoop]: === Iteration 119 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 21:11:33,941 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:11:33,941 INFO L85 PathProgramCache]: Analyzing trace with hash -938880682, now seen corresponding path program 15 times [2024-06-21 21:11:33,941 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:11:33,941 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1441176] [2024-06-21 21:11:33,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:11:33,941 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:11:33,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:11:34,794 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:11:34,795 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:11:34,795 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1441176] [2024-06-21 21:11:34,795 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1441176] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:11:34,795 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:11:34,795 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-21 21:11:34,795 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1371943834] [2024-06-21 21:11:34,795 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:11:34,795 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-21 21:11:34,795 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:11:34,795 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-21 21:11:34,796 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2024-06-21 21:11:34,909 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 21:11:34,909 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 195 places, 153 transitions, 1165 flow. Second operand has 12 states, 12 states have (on average 7.333333333333333) internal successors, (88), 12 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:11:34,909 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:11:34,909 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 21:11:34,910 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:11:35,212 INFO L124 PetriNetUnfolderBase]: 446/852 cut-off events. [2024-06-21 21:11:35,212 INFO L125 PetriNetUnfolderBase]: For 124746/124746 co-relation queries the response was YES. [2024-06-21 21:11:35,215 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6256 conditions, 852 events. 446/852 cut-off events. For 124746/124746 co-relation queries the response was YES. Maximal size of possible extension queue 77. Compared 4302 event pairs, 92 based on Foata normal form. 8/858 useless extension candidates. Maximal degree in co-relation 6164. Up to 658 conditions per place. [2024-06-21 21:11:35,218 INFO L140 encePairwiseOnDemand]: 20/31 looper letters, 114 selfloop transitions, 40 changer transitions 14/170 dead transitions. [2024-06-21 21:11:35,218 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 205 places, 170 transitions, 1557 flow [2024-06-21 21:11:35,218 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 21:11:35,218 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 21:11:35,218 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 128 transitions. [2024-06-21 21:11:35,219 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.375366568914956 [2024-06-21 21:11:35,219 INFO L175 Difference]: Start difference. First operand has 195 places, 153 transitions, 1165 flow. Second operand 11 states and 128 transitions. [2024-06-21 21:11:35,219 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 205 places, 170 transitions, 1557 flow [2024-06-21 21:11:35,371 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 199 places, 170 transitions, 1501 flow, removed 3 selfloop flow, removed 6 redundant places. [2024-06-21 21:11:35,373 INFO L231 Difference]: Finished difference. Result has 200 places, 148 transitions, 1160 flow [2024-06-21 21:11:35,373 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1109, PETRI_DIFFERENCE_MINUEND_PLACES=189, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=153, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=113, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=1160, PETRI_PLACES=200, PETRI_TRANSITIONS=148} [2024-06-21 21:11:35,373 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 170 predicate places. [2024-06-21 21:11:35,373 INFO L495 AbstractCegarLoop]: Abstraction has has 200 places, 148 transitions, 1160 flow [2024-06-21 21:11:35,373 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 7.333333333333333) internal successors, (88), 12 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:11:35,374 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:11:35,374 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:11:35,374 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable118 [2024-06-21 21:11:35,374 INFO L420 AbstractCegarLoop]: === Iteration 120 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 21:11:35,374 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:11:35,374 INFO L85 PathProgramCache]: Analyzing trace with hash -2130045414, now seen corresponding path program 16 times [2024-06-21 21:11:35,374 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:11:35,374 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [654876402] [2024-06-21 21:11:35,375 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:11:35,375 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:11:35,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:11:36,149 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:11:36,149 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:11:36,149 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [654876402] [2024-06-21 21:11:36,150 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [654876402] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:11:36,150 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:11:36,150 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-21 21:11:36,150 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1710923928] [2024-06-21 21:11:36,150 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:11:36,150 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-21 21:11:36,150 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:11:36,151 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-21 21:11:36,151 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2024-06-21 21:11:36,293 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 21:11:36,294 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 200 places, 148 transitions, 1160 flow. Second operand has 12 states, 12 states have (on average 7.333333333333333) internal successors, (88), 12 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:11:36,294 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:11:36,294 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 21:11:36,294 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:11:36,646 INFO L124 PetriNetUnfolderBase]: 473/909 cut-off events. [2024-06-21 21:11:36,646 INFO L125 PetriNetUnfolderBase]: For 154450/154450 co-relation queries the response was YES. [2024-06-21 21:11:36,650 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7183 conditions, 909 events. 473/909 cut-off events. For 154450/154450 co-relation queries the response was YES. Maximal size of possible extension queue 80. Compared 4711 event pairs, 97 based on Foata normal form. 8/915 useless extension candidates. Maximal degree in co-relation 7089. Up to 518 conditions per place. [2024-06-21 21:11:36,653 INFO L140 encePairwiseOnDemand]: 20/31 looper letters, 85 selfloop transitions, 78 changer transitions 10/175 dead transitions. [2024-06-21 21:11:36,653 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 203 places, 175 transitions, 1757 flow [2024-06-21 21:11:36,653 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 21:11:36,653 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 21:11:36,653 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 141 transitions. [2024-06-21 21:11:36,653 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41348973607038125 [2024-06-21 21:11:36,654 INFO L175 Difference]: Start difference. First operand has 200 places, 148 transitions, 1160 flow. Second operand 11 states and 141 transitions. [2024-06-21 21:11:36,654 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 203 places, 175 transitions, 1757 flow [2024-06-21 21:11:36,812 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 193 places, 175 transitions, 1661 flow, removed 8 selfloop flow, removed 10 redundant places. [2024-06-21 21:11:36,814 INFO L231 Difference]: Finished difference. Result has 196 places, 147 transitions, 1228 flow [2024-06-21 21:11:36,814 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1072, PETRI_DIFFERENCE_MINUEND_PLACES=183, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=148, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=78, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=70, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=1228, PETRI_PLACES=196, PETRI_TRANSITIONS=147} [2024-06-21 21:11:36,814 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 166 predicate places. [2024-06-21 21:11:36,814 INFO L495 AbstractCegarLoop]: Abstraction has has 196 places, 147 transitions, 1228 flow [2024-06-21 21:11:36,814 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 7.333333333333333) internal successors, (88), 12 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:11:36,814 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:11:36,814 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:11:36,815 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable119 [2024-06-21 21:11:36,815 INFO L420 AbstractCegarLoop]: === Iteration 121 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 21:11:36,815 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:11:36,815 INFO L85 PathProgramCache]: Analyzing trace with hash -581978930, now seen corresponding path program 17 times [2024-06-21 21:11:36,815 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:11:36,815 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1378927562] [2024-06-21 21:11:36,815 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:11:36,815 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:11:36,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:11:37,769 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:11:37,769 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:11:37,769 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1378927562] [2024-06-21 21:11:37,769 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1378927562] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:11:37,769 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:11:37,769 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-21 21:11:37,771 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1108940621] [2024-06-21 21:11:37,771 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:11:37,771 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-21 21:11:37,771 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:11:37,772 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-21 21:11:37,772 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2024-06-21 21:11:37,882 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 21:11:37,882 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 196 places, 147 transitions, 1228 flow. Second operand has 12 states, 12 states have (on average 7.333333333333333) internal successors, (88), 12 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:11:37,882 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:11:37,882 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 21:11:37,882 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:11:38,216 INFO L124 PetriNetUnfolderBase]: 463/891 cut-off events. [2024-06-21 21:11:38,216 INFO L125 PetriNetUnfolderBase]: For 141946/141946 co-relation queries the response was YES. [2024-06-21 21:11:38,220 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7086 conditions, 891 events. 463/891 cut-off events. For 141946/141946 co-relation queries the response was YES. Maximal size of possible extension queue 78. Compared 4574 event pairs, 91 based on Foata normal form. 8/897 useless extension candidates. Maximal degree in co-relation 6993. Up to 518 conditions per place. [2024-06-21 21:11:38,223 INFO L140 encePairwiseOnDemand]: 20/31 looper letters, 84 selfloop transitions, 78 changer transitions 7/171 dead transitions. [2024-06-21 21:11:38,223 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 204 places, 171 transitions, 1802 flow [2024-06-21 21:11:38,223 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 21:11:38,223 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 21:11:38,224 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 138 transitions. [2024-06-21 21:11:38,224 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4046920821114369 [2024-06-21 21:11:38,224 INFO L175 Difference]: Start difference. First operand has 196 places, 147 transitions, 1228 flow. Second operand 11 states and 138 transitions. [2024-06-21 21:11:38,224 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 204 places, 171 transitions, 1802 flow [2024-06-21 21:11:38,370 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 194 places, 171 transitions, 1638 flow, removed 4 selfloop flow, removed 10 redundant places. [2024-06-21 21:11:38,371 INFO L231 Difference]: Finished difference. Result has 195 places, 145 transitions, 1211 flow [2024-06-21 21:11:38,372 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1066, PETRI_DIFFERENCE_MINUEND_PLACES=184, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=147, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=78, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=69, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=1211, PETRI_PLACES=195, PETRI_TRANSITIONS=145} [2024-06-21 21:11:38,372 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 165 predicate places. [2024-06-21 21:11:38,372 INFO L495 AbstractCegarLoop]: Abstraction has has 195 places, 145 transitions, 1211 flow [2024-06-21 21:11:38,372 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 7.333333333333333) internal successors, (88), 12 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:11:38,372 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:11:38,372 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:11:38,372 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable120 [2024-06-21 21:11:38,373 INFO L420 AbstractCegarLoop]: === Iteration 122 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 21:11:38,373 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:11:38,373 INFO L85 PathProgramCache]: Analyzing trace with hash -581973350, now seen corresponding path program 18 times [2024-06-21 21:11:38,373 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:11:38,374 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [960852289] [2024-06-21 21:11:38,374 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:11:38,374 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:11:38,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:11:39,226 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:11:39,226 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:11:39,226 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [960852289] [2024-06-21 21:11:39,226 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [960852289] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:11:39,226 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:11:39,227 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-21 21:11:39,227 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2065905031] [2024-06-21 21:11:39,227 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:11:39,227 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-21 21:11:39,227 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:11:39,227 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-21 21:11:39,227 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2024-06-21 21:11:39,325 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 21:11:39,325 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 195 places, 145 transitions, 1211 flow. Second operand has 12 states, 12 states have (on average 7.333333333333333) internal successors, (88), 12 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:11:39,326 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:11:39,326 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 21:11:39,326 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:11:39,717 INFO L124 PetriNetUnfolderBase]: 435/843 cut-off events. [2024-06-21 21:11:39,717 INFO L125 PetriNetUnfolderBase]: For 146660/146660 co-relation queries the response was YES. [2024-06-21 21:11:39,721 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5560 conditions, 843 events. 435/843 cut-off events. For 146660/146660 co-relation queries the response was YES. Maximal size of possible extension queue 77. Compared 4316 event pairs, 85 based on Foata normal form. 30/871 useless extension candidates. Maximal degree in co-relation 5469. Up to 483 conditions per place. [2024-06-21 21:11:39,723 INFO L140 encePairwiseOnDemand]: 20/31 looper letters, 82 selfloop transitions, 59 changer transitions 23/166 dead transitions. [2024-06-21 21:11:39,723 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 205 places, 166 transitions, 1615 flow [2024-06-21 21:11:39,724 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-06-21 21:11:39,724 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-06-21 21:11:39,724 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 149 transitions. [2024-06-21 21:11:39,724 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.369727047146402 [2024-06-21 21:11:39,724 INFO L175 Difference]: Start difference. First operand has 195 places, 145 transitions, 1211 flow. Second operand 13 states and 149 transitions. [2024-06-21 21:11:39,724 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 205 places, 166 transitions, 1615 flow [2024-06-21 21:11:39,858 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 195 places, 166 transitions, 1457 flow, removed 2 selfloop flow, removed 10 redundant places. [2024-06-21 21:11:39,860 INFO L231 Difference]: Finished difference. Result has 196 places, 131 transitions, 1075 flow [2024-06-21 21:11:39,860 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1053, PETRI_DIFFERENCE_MINUEND_PLACES=183, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=145, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=59, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=86, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=1075, PETRI_PLACES=196, PETRI_TRANSITIONS=131} [2024-06-21 21:11:39,860 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 166 predicate places. [2024-06-21 21:11:39,861 INFO L495 AbstractCegarLoop]: Abstraction has has 196 places, 131 transitions, 1075 flow [2024-06-21 21:11:39,861 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 7.333333333333333) internal successors, (88), 12 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:11:39,861 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:11:39,861 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:11:39,861 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable121 [2024-06-21 21:11:39,861 INFO L420 AbstractCegarLoop]: === Iteration 123 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 21:11:39,861 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:11:39,861 INFO L85 PathProgramCache]: Analyzing trace with hash -443450780, now seen corresponding path program 19 times [2024-06-21 21:11:39,862 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:11:39,862 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [491572966] [2024-06-21 21:11:39,862 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:11:39,862 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:11:39,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:11:40,664 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:11:40,664 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:11:40,664 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [491572966] [2024-06-21 21:11:40,664 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [491572966] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:11:40,664 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:11:40,664 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-21 21:11:40,665 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [155867266] [2024-06-21 21:11:40,665 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:11:40,666 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-21 21:11:40,666 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:11:40,667 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-21 21:11:40,667 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2024-06-21 21:11:40,754 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 21:11:40,755 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 196 places, 131 transitions, 1075 flow. Second operand has 12 states, 12 states have (on average 7.333333333333333) internal successors, (88), 12 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:11:40,755 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:11:40,755 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 21:11:40,755 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:11:41,047 INFO L124 PetriNetUnfolderBase]: 370/712 cut-off events. [2024-06-21 21:11:41,047 INFO L125 PetriNetUnfolderBase]: For 91935/91935 co-relation queries the response was YES. [2024-06-21 21:11:41,050 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4965 conditions, 712 events. 370/712 cut-off events. For 91935/91935 co-relation queries the response was YES. Maximal size of possible extension queue 66. Compared 3420 event pairs, 69 based on Foata normal form. 8/718 useless extension candidates. Maximal degree in co-relation 4875. Up to 549 conditions per place. [2024-06-21 21:11:41,052 INFO L140 encePairwiseOnDemand]: 20/31 looper letters, 102 selfloop transitions, 33 changer transitions 11/148 dead transitions. [2024-06-21 21:11:41,052 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 192 places, 148 transitions, 1423 flow [2024-06-21 21:11:41,052 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 21:11:41,052 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 21:11:41,053 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 124 transitions. [2024-06-21 21:11:41,053 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36363636363636365 [2024-06-21 21:11:41,053 INFO L175 Difference]: Start difference. First operand has 196 places, 131 transitions, 1075 flow. Second operand 11 states and 124 transitions. [2024-06-21 21:11:41,053 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 192 places, 148 transitions, 1423 flow [2024-06-21 21:11:41,162 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 176 places, 148 transitions, 1289 flow, removed 8 selfloop flow, removed 16 redundant places. [2024-06-21 21:11:41,164 INFO L231 Difference]: Finished difference. Result has 177 places, 128 transitions, 992 flow [2024-06-21 21:11:41,164 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=941, PETRI_DIFFERENCE_MINUEND_PLACES=166, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=131, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=98, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=992, PETRI_PLACES=177, PETRI_TRANSITIONS=128} [2024-06-21 21:11:41,164 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 147 predicate places. [2024-06-21 21:11:41,164 INFO L495 AbstractCegarLoop]: Abstraction has has 177 places, 128 transitions, 992 flow [2024-06-21 21:11:41,164 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 7.333333333333333) internal successors, (88), 12 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:11:41,164 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:11:41,164 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:11:41,165 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable122 [2024-06-21 21:11:41,165 INFO L420 AbstractCegarLoop]: === Iteration 124 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 21:11:41,165 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:11:41,165 INFO L85 PathProgramCache]: Analyzing trace with hash -443594930, now seen corresponding path program 20 times [2024-06-21 21:11:41,165 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:11:41,165 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1032693077] [2024-06-21 21:11:41,165 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:11:41,165 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:11:41,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:11:41,994 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:11:41,994 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:11:41,995 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1032693077] [2024-06-21 21:11:41,995 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1032693077] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:11:41,995 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:11:41,995 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-21 21:11:41,995 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [776432377] [2024-06-21 21:11:41,995 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:11:41,995 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-21 21:11:41,996 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:11:41,996 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-21 21:11:41,996 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2024-06-21 21:11:42,105 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 21:11:42,105 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 177 places, 128 transitions, 992 flow. Second operand has 12 states, 12 states have (on average 7.333333333333333) internal successors, (88), 12 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:11:42,105 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:11:42,106 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 21:11:42,106 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:11:42,390 INFO L124 PetriNetUnfolderBase]: 363/699 cut-off events. [2024-06-21 21:11:42,391 INFO L125 PetriNetUnfolderBase]: For 76623/76623 co-relation queries the response was YES. [2024-06-21 21:11:42,393 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4637 conditions, 699 events. 363/699 cut-off events. For 76623/76623 co-relation queries the response was YES. Maximal size of possible extension queue 64. Compared 3334 event pairs, 67 based on Foata normal form. 8/705 useless extension candidates. Maximal degree in co-relation 4553. Up to 531 conditions per place. [2024-06-21 21:11:42,395 INFO L140 encePairwiseOnDemand]: 20/31 looper letters, 98 selfloop transitions, 28 changer transitions 18/146 dead transitions. [2024-06-21 21:11:42,395 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 182 places, 146 transitions, 1338 flow [2024-06-21 21:11:42,395 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 21:11:42,395 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 21:11:42,396 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 124 transitions. [2024-06-21 21:11:42,396 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36363636363636365 [2024-06-21 21:11:42,396 INFO L175 Difference]: Start difference. First operand has 177 places, 128 transitions, 992 flow. Second operand 11 states and 124 transitions. [2024-06-21 21:11:42,396 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 182 places, 146 transitions, 1338 flow [2024-06-21 21:11:42,483 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 173 places, 146 transitions, 1268 flow, removed 2 selfloop flow, removed 9 redundant places. [2024-06-21 21:11:42,484 INFO L231 Difference]: Finished difference. Result has 174 places, 121 transitions, 939 flow [2024-06-21 21:11:42,484 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=922, PETRI_DIFFERENCE_MINUEND_PLACES=163, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=128, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=100, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=939, PETRI_PLACES=174, PETRI_TRANSITIONS=121} [2024-06-21 21:11:42,484 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 144 predicate places. [2024-06-21 21:11:42,485 INFO L495 AbstractCegarLoop]: Abstraction has has 174 places, 121 transitions, 939 flow [2024-06-21 21:11:42,485 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 7.333333333333333) internal successors, (88), 12 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:11:42,485 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:11:42,485 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:11:42,485 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable123 [2024-06-21 21:11:42,485 INFO L420 AbstractCegarLoop]: === Iteration 125 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 21:11:42,485 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:11:42,486 INFO L85 PathProgramCache]: Analyzing trace with hash -1138176892, now seen corresponding path program 21 times [2024-06-21 21:11:42,486 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:11:42,486 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [443089150] [2024-06-21 21:11:42,486 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:11:42,486 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:11:42,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:11:43,234 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:11:43,234 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:11:43,236 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [443089150] [2024-06-21 21:11:43,236 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [443089150] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:11:43,236 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:11:43,236 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-21 21:11:43,236 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1018491426] [2024-06-21 21:11:43,236 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:11:43,236 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-21 21:11:43,236 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:11:43,237 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-21 21:11:43,237 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2024-06-21 21:11:43,398 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 21:11:43,398 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 174 places, 121 transitions, 939 flow. Second operand has 12 states, 12 states have (on average 7.333333333333333) internal successors, (88), 12 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:11:43,398 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:11:43,398 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 21:11:43,399 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:11:43,731 INFO L124 PetriNetUnfolderBase]: 352/678 cut-off events. [2024-06-21 21:11:43,731 INFO L125 PetriNetUnfolderBase]: For 77903/77903 co-relation queries the response was YES. [2024-06-21 21:11:43,734 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4526 conditions, 678 events. 352/678 cut-off events. For 77903/77903 co-relation queries the response was YES. Maximal size of possible extension queue 61. Compared 3207 event pairs, 75 based on Foata normal form. 10/686 useless extension candidates. Maximal degree in co-relation 4443. Up to 478 conditions per place. [2024-06-21 21:11:43,735 INFO L140 encePairwiseOnDemand]: 20/31 looper letters, 87 selfloop transitions, 40 changer transitions 11/140 dead transitions. [2024-06-21 21:11:43,735 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 174 places, 140 transitions, 1285 flow [2024-06-21 21:11:43,736 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 21:11:43,736 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 21:11:43,736 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 133 transitions. [2024-06-21 21:11:43,736 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39002932551319647 [2024-06-21 21:11:43,736 INFO L175 Difference]: Start difference. First operand has 174 places, 121 transitions, 939 flow. Second operand 11 states and 133 transitions. [2024-06-21 21:11:43,736 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 174 places, 140 transitions, 1285 flow [2024-06-21 21:11:43,810 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 163 places, 140 transitions, 1217 flow, removed 6 selfloop flow, removed 11 redundant places. [2024-06-21 21:11:43,811 INFO L231 Difference]: Finished difference. Result has 164 places, 118 transitions, 932 flow [2024-06-21 21:11:43,812 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=871, PETRI_DIFFERENCE_MINUEND_PLACES=153, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=121, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=81, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=932, PETRI_PLACES=164, PETRI_TRANSITIONS=118} [2024-06-21 21:11:43,812 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 134 predicate places. [2024-06-21 21:11:43,812 INFO L495 AbstractCegarLoop]: Abstraction has has 164 places, 118 transitions, 932 flow [2024-06-21 21:11:43,812 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 7.333333333333333) internal successors, (88), 12 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:11:43,812 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:11:43,812 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:11:43,812 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable124 [2024-06-21 21:11:43,813 INFO L420 AbstractCegarLoop]: === Iteration 126 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 21:11:43,813 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:11:43,813 INFO L85 PathProgramCache]: Analyzing trace with hash -1138182472, now seen corresponding path program 22 times [2024-06-21 21:11:43,813 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:11:43,813 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [144425488] [2024-06-21 21:11:43,814 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:11:43,814 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:11:43,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:11:44,672 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:11:44,672 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:11:44,672 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [144425488] [2024-06-21 21:11:44,672 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [144425488] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:11:44,672 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:11:44,672 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-21 21:11:44,672 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2115153299] [2024-06-21 21:11:44,673 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:11:44,673 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-21 21:11:44,673 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:11:44,673 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-21 21:11:44,673 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2024-06-21 21:11:44,795 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 21:11:44,795 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 164 places, 118 transitions, 932 flow. Second operand has 12 states, 12 states have (on average 7.333333333333333) internal successors, (88), 12 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:11:44,795 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:11:44,795 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 21:11:44,795 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:11:45,116 INFO L124 PetriNetUnfolderBase]: 344/666 cut-off events. [2024-06-21 21:11:45,116 INFO L125 PetriNetUnfolderBase]: For 62663/62663 co-relation queries the response was YES. [2024-06-21 21:11:45,118 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4319 conditions, 666 events. 344/666 cut-off events. For 62663/62663 co-relation queries the response was YES. Maximal size of possible extension queue 61. Compared 3165 event pairs, 65 based on Foata normal form. 8/672 useless extension candidates. Maximal degree in co-relation 4241. Up to 476 conditions per place. [2024-06-21 21:11:45,133 INFO L140 encePairwiseOnDemand]: 20/31 looper letters, 86 selfloop transitions, 38 changer transitions 11/137 dead transitions. [2024-06-21 21:11:45,134 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 171 places, 137 transitions, 1265 flow [2024-06-21 21:11:45,134 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 21:11:45,134 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 21:11:45,134 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 130 transitions. [2024-06-21 21:11:45,134 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3812316715542522 [2024-06-21 21:11:45,135 INFO L175 Difference]: Start difference. First operand has 164 places, 118 transitions, 932 flow. Second operand 11 states and 130 transitions. [2024-06-21 21:11:45,135 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 171 places, 137 transitions, 1265 flow [2024-06-21 21:11:45,212 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 161 places, 137 transitions, 1181 flow, removed 2 selfloop flow, removed 10 redundant places. [2024-06-21 21:11:45,214 INFO L231 Difference]: Finished difference. Result has 163 places, 116 transitions, 914 flow [2024-06-21 21:11:45,214 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=848, PETRI_DIFFERENCE_MINUEND_PLACES=151, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=118, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=80, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=914, PETRI_PLACES=163, PETRI_TRANSITIONS=116} [2024-06-21 21:11:45,214 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 133 predicate places. [2024-06-21 21:11:45,214 INFO L495 AbstractCegarLoop]: Abstraction has has 163 places, 116 transitions, 914 flow [2024-06-21 21:11:45,214 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 7.333333333333333) internal successors, (88), 12 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:11:45,214 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:11:45,215 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:11:45,215 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable125 [2024-06-21 21:11:45,215 INFO L420 AbstractCegarLoop]: === Iteration 127 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 21:11:45,215 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:11:45,215 INFO L85 PathProgramCache]: Analyzing trace with hash -1132814512, now seen corresponding path program 23 times [2024-06-21 21:11:45,216 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:11:45,216 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1014758182] [2024-06-21 21:11:45,216 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:11:45,216 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:11:45,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:11:46,111 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:11:46,111 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:11:46,111 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1014758182] [2024-06-21 21:11:46,111 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1014758182] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:11:46,111 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:11:46,111 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-21 21:11:46,111 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1943494915] [2024-06-21 21:11:46,112 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:11:46,112 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-21 21:11:46,112 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:11:46,112 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-21 21:11:46,112 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2024-06-21 21:11:46,191 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 21:11:46,192 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 163 places, 116 transitions, 914 flow. Second operand has 12 states, 12 states have (on average 7.333333333333333) internal successors, (88), 12 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:11:46,192 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:11:46,192 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 21:11:46,192 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:11:46,447 INFO L124 PetriNetUnfolderBase]: 341/661 cut-off events. [2024-06-21 21:11:46,447 INFO L125 PetriNetUnfolderBase]: For 63458/63458 co-relation queries the response was YES. [2024-06-21 21:11:46,449 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4271 conditions, 661 events. 341/661 cut-off events. For 63458/63458 co-relation queries the response was YES. Maximal size of possible extension queue 59. Compared 3141 event pairs, 71 based on Foata normal form. 10/669 useless extension candidates. Maximal degree in co-relation 4193. Up to 473 conditions per place. [2024-06-21 21:11:46,451 INFO L140 encePairwiseOnDemand]: 20/31 looper letters, 85 selfloop transitions, 36 changer transitions 11/134 dead transitions. [2024-06-21 21:11:46,451 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 169 places, 134 transitions, 1244 flow [2024-06-21 21:11:46,451 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 21:11:46,452 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 21:11:46,452 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 129 transitions. [2024-06-21 21:11:46,452 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3782991202346041 [2024-06-21 21:11:46,452 INFO L175 Difference]: Start difference. First operand has 163 places, 116 transitions, 914 flow. Second operand 11 states and 129 transitions. [2024-06-21 21:11:46,452 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 169 places, 134 transitions, 1244 flow [2024-06-21 21:11:46,526 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 160 places, 134 transitions, 1164 flow, removed 2 selfloop flow, removed 9 redundant places. [2024-06-21 21:11:46,528 INFO L231 Difference]: Finished difference. Result has 161 places, 113 transitions, 887 flow [2024-06-21 21:11:46,528 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=834, PETRI_DIFFERENCE_MINUEND_PLACES=150, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=116, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=80, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=887, PETRI_PLACES=161, PETRI_TRANSITIONS=113} [2024-06-21 21:11:46,529 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 131 predicate places. [2024-06-21 21:11:46,529 INFO L495 AbstractCegarLoop]: Abstraction has has 161 places, 113 transitions, 887 flow [2024-06-21 21:11:46,529 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 7.333333333333333) internal successors, (88), 12 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:11:46,529 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:11:46,530 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:11:46,530 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable126 [2024-06-21 21:11:46,531 INFO L420 AbstractCegarLoop]: === Iteration 128 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 21:11:46,531 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:11:46,531 INFO L85 PathProgramCache]: Analyzing trace with hash -1138326622, now seen corresponding path program 24 times [2024-06-21 21:11:46,531 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:11:46,531 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1506294308] [2024-06-21 21:11:46,531 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:11:46,531 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:11:46,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:11:47,365 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:11:47,365 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:11:47,365 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1506294308] [2024-06-21 21:11:47,366 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1506294308] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:11:47,366 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:11:47,366 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-21 21:11:47,366 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1629150277] [2024-06-21 21:11:47,366 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:11:47,366 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-21 21:11:47,366 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:11:47,366 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-21 21:11:47,366 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2024-06-21 21:11:47,489 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 21:11:47,490 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 161 places, 113 transitions, 887 flow. Second operand has 12 states, 12 states have (on average 7.333333333333333) internal successors, (88), 12 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:11:47,490 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:11:47,490 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 21:11:47,490 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:11:47,786 INFO L124 PetriNetUnfolderBase]: 351/687 cut-off events. [2024-06-21 21:11:47,786 INFO L125 PetriNetUnfolderBase]: For 72243/72243 co-relation queries the response was YES. [2024-06-21 21:11:47,789 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4752 conditions, 687 events. 351/687 cut-off events. For 72243/72243 co-relation queries the response was YES. Maximal size of possible extension queue 59. Compared 3273 event pairs, 89 based on Foata normal form. 8/693 useless extension candidates. Maximal degree in co-relation 4675. Up to 442 conditions per place. [2024-06-21 21:11:47,790 INFO L140 encePairwiseOnDemand]: 20/31 looper letters, 88 selfloop transitions, 34 changer transitions 11/135 dead transitions. [2024-06-21 21:11:47,790 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 168 places, 135 transitions, 1345 flow [2024-06-21 21:11:47,791 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 21:11:47,791 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 21:11:47,791 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 132 transitions. [2024-06-21 21:11:47,792 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3870967741935484 [2024-06-21 21:11:47,792 INFO L175 Difference]: Start difference. First operand has 161 places, 113 transitions, 887 flow. Second operand 11 states and 132 transitions. [2024-06-21 21:11:47,792 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 168 places, 135 transitions, 1345 flow [2024-06-21 21:11:47,888 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 158 places, 135 transitions, 1265 flow, removed 4 selfloop flow, removed 10 redundant places. [2024-06-21 21:11:47,890 INFO L231 Difference]: Finished difference. Result has 159 places, 109 transitions, 856 flow [2024-06-21 21:11:47,890 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=811, PETRI_DIFFERENCE_MINUEND_PLACES=148, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=113, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=79, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=856, PETRI_PLACES=159, PETRI_TRANSITIONS=109} [2024-06-21 21:11:47,890 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 129 predicate places. [2024-06-21 21:11:47,890 INFO L495 AbstractCegarLoop]: Abstraction has has 159 places, 109 transitions, 856 flow [2024-06-21 21:11:47,891 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 7.333333333333333) internal successors, (88), 12 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:11:47,891 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:11:47,891 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:11:47,891 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable127 [2024-06-21 21:11:47,891 INFO L420 AbstractCegarLoop]: === Iteration 129 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 21:11:47,891 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:11:47,892 INFO L85 PathProgramCache]: Analyzing trace with hash 420191484, now seen corresponding path program 25 times [2024-06-21 21:11:47,892 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:11:47,892 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1282027201] [2024-06-21 21:11:47,892 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:11:47,892 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:11:47,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:11:48,785 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:11:48,785 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:11:48,786 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1282027201] [2024-06-21 21:11:48,786 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1282027201] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:11:48,786 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:11:48,786 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-21 21:11:48,786 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2041769416] [2024-06-21 21:11:48,786 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:11:48,786 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-21 21:11:48,787 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:11:48,787 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-21 21:11:48,787 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2024-06-21 21:11:48,899 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 21:11:48,899 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 159 places, 109 transitions, 856 flow. Second operand has 12 states, 12 states have (on average 7.333333333333333) internal successors, (88), 12 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:11:48,899 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:11:48,899 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 21:11:48,899 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:11:49,185 INFO L124 PetriNetUnfolderBase]: 318/620 cut-off events. [2024-06-21 21:11:49,185 INFO L125 PetriNetUnfolderBase]: For 58225/58225 co-relation queries the response was YES. [2024-06-21 21:11:49,187 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4067 conditions, 620 events. 318/620 cut-off events. For 58225/58225 co-relation queries the response was YES. Maximal size of possible extension queue 55. Compared 2894 event pairs, 71 based on Foata normal form. 8/626 useless extension candidates. Maximal degree in co-relation 3991. Up to 468 conditions per place. [2024-06-21 21:11:49,189 INFO L140 encePairwiseOnDemand]: 20/31 looper letters, 86 selfloop transitions, 22 changer transitions 16/126 dead transitions. [2024-06-21 21:11:49,189 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 164 places, 126 transitions, 1160 flow [2024-06-21 21:11:49,189 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 21:11:49,189 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 21:11:49,189 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 123 transitions. [2024-06-21 21:11:49,190 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36070381231671556 [2024-06-21 21:11:49,190 INFO L175 Difference]: Start difference. First operand has 159 places, 109 transitions, 856 flow. Second operand 11 states and 123 transitions. [2024-06-21 21:11:49,190 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 164 places, 126 transitions, 1160 flow [2024-06-21 21:11:49,269 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 153 places, 126 transitions, 1085 flow, removed 4 selfloop flow, removed 11 redundant places. [2024-06-21 21:11:49,271 INFO L231 Difference]: Finished difference. Result has 154 places, 103 transitions, 791 flow [2024-06-21 21:11:49,271 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=781, PETRI_DIFFERENCE_MINUEND_PLACES=143, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=109, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=87, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=791, PETRI_PLACES=154, PETRI_TRANSITIONS=103} [2024-06-21 21:11:49,271 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 124 predicate places. [2024-06-21 21:11:49,271 INFO L495 AbstractCegarLoop]: Abstraction has has 154 places, 103 transitions, 791 flow [2024-06-21 21:11:49,271 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 7.333333333333333) internal successors, (88), 12 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:11:49,272 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:11:49,272 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:11:49,272 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable128 [2024-06-21 21:11:49,272 INFO L420 AbstractCegarLoop]: === Iteration 130 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 21:11:49,272 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:11:49,272 INFO L85 PathProgramCache]: Analyzing trace with hash 896717474, now seen corresponding path program 2 times [2024-06-21 21:11:49,272 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:11:49,272 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1157179241] [2024-06-21 21:11:49,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:11:49,273 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:11:49,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:11:50,408 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:11:50,408 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:11:50,408 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1157179241] [2024-06-21 21:11:50,408 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1157179241] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:11:50,408 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:11:50,408 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-21 21:11:50,409 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [235432236] [2024-06-21 21:11:50,409 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:11:50,409 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-21 21:11:50,409 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:11:50,409 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-21 21:11:50,409 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2024-06-21 21:11:50,520 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 21:11:50,520 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 154 places, 103 transitions, 791 flow. Second operand has 12 states, 12 states have (on average 7.333333333333333) internal successors, (88), 12 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:11:50,520 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:11:50,520 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 21:11:50,520 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:11:50,796 INFO L124 PetriNetUnfolderBase]: 299/579 cut-off events. [2024-06-21 21:11:50,797 INFO L125 PetriNetUnfolderBase]: For 44305/44305 co-relation queries the response was YES. [2024-06-21 21:11:50,799 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3812 conditions, 579 events. 299/579 cut-off events. For 44305/44305 co-relation queries the response was YES. Maximal size of possible extension queue 52. Compared 2614 event pairs, 67 based on Foata normal form. 2/579 useless extension candidates. Maximal degree in co-relation 3739. Up to 484 conditions per place. [2024-06-21 21:11:50,800 INFO L140 encePairwiseOnDemand]: 20/31 looper letters, 88 selfloop transitions, 28 changer transitions 0/118 dead transitions. [2024-06-21 21:11:50,800 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 153 places, 118 transitions, 1070 flow [2024-06-21 21:11:50,800 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 21:11:50,800 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 21:11:50,801 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 113 transitions. [2024-06-21 21:11:50,801 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36451612903225805 [2024-06-21 21:11:50,801 INFO L175 Difference]: Start difference. First operand has 154 places, 103 transitions, 791 flow. Second operand 10 states and 113 transitions. [2024-06-21 21:11:50,801 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 153 places, 118 transitions, 1070 flow [2024-06-21 21:11:50,867 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 143 places, 118 transitions, 1016 flow, removed 5 selfloop flow, removed 10 redundant places. [2024-06-21 21:11:50,869 INFO L231 Difference]: Finished difference. Result has 144 places, 104 transitions, 809 flow [2024-06-21 21:11:50,869 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=737, PETRI_DIFFERENCE_MINUEND_PLACES=134, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=103, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=75, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=809, PETRI_PLACES=144, PETRI_TRANSITIONS=104} [2024-06-21 21:11:50,869 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 114 predicate places. [2024-06-21 21:11:50,869 INFO L495 AbstractCegarLoop]: Abstraction has has 144 places, 104 transitions, 809 flow [2024-06-21 21:11:50,869 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 7.333333333333333) internal successors, (88), 12 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:11:50,869 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:11:50,870 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:11:50,870 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable129 [2024-06-21 21:11:50,870 INFO L420 AbstractCegarLoop]: === Iteration 131 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 21:11:50,870 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:11:50,870 INFO L85 PathProgramCache]: Analyzing trace with hash 889089118, now seen corresponding path program 26 times [2024-06-21 21:11:50,870 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:11:50,870 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1459391918] [2024-06-21 21:11:50,870 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:11:50,871 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:11:50,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:11:51,765 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:11:51,765 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:11:51,766 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1459391918] [2024-06-21 21:11:51,766 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1459391918] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:11:51,766 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:11:51,766 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-21 21:11:51,766 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [38871159] [2024-06-21 21:11:51,766 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:11:51,766 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-21 21:11:51,766 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:11:51,767 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-21 21:11:51,767 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2024-06-21 21:11:51,871 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 21:11:51,872 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 144 places, 104 transitions, 809 flow. Second operand has 12 states, 12 states have (on average 7.333333333333333) internal successors, (88), 12 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:11:51,872 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:11:51,872 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 21:11:51,872 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:11:52,163 INFO L124 PetriNetUnfolderBase]: 315/615 cut-off events. [2024-06-21 21:11:52,163 INFO L125 PetriNetUnfolderBase]: For 46505/46505 co-relation queries the response was YES. [2024-06-21 21:11:52,166 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3836 conditions, 615 events. 315/615 cut-off events. For 46505/46505 co-relation queries the response was YES. Maximal size of possible extension queue 53. Compared 2868 event pairs, 75 based on Foata normal form. 10/623 useless extension candidates. Maximal degree in co-relation 3767. Up to 500 conditions per place. [2024-06-21 21:11:52,168 INFO L140 encePairwiseOnDemand]: 20/31 looper letters, 86 selfloop transitions, 23 changer transitions 11/122 dead transitions. [2024-06-21 21:11:52,168 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 154 places, 122 transitions, 1115 flow [2024-06-21 21:11:52,168 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 21:11:52,168 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 21:11:52,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 126 transitions. [2024-06-21 21:11:52,169 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36950146627565983 [2024-06-21 21:11:52,169 INFO L175 Difference]: Start difference. First operand has 144 places, 104 transitions, 809 flow. Second operand 11 states and 126 transitions. [2024-06-21 21:11:52,169 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 154 places, 122 transitions, 1115 flow [2024-06-21 21:11:52,243 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 146 places, 122 transitions, 1044 flow, removed 4 selfloop flow, removed 8 redundant places. [2024-06-21 21:11:52,244 INFO L231 Difference]: Finished difference. Result has 147 places, 101 transitions, 765 flow [2024-06-21 21:11:52,244 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=738, PETRI_DIFFERENCE_MINUEND_PLACES=136, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=104, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=81, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=765, PETRI_PLACES=147, PETRI_TRANSITIONS=101} [2024-06-21 21:11:52,244 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 117 predicate places. [2024-06-21 21:11:52,245 INFO L495 AbstractCegarLoop]: Abstraction has has 147 places, 101 transitions, 765 flow [2024-06-21 21:11:52,245 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 7.333333333333333) internal successors, (88), 12 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:11:52,245 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:11:52,245 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:11:52,245 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable130 [2024-06-21 21:11:52,245 INFO L420 AbstractCegarLoop]: === Iteration 132 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 21:11:52,245 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:11:52,245 INFO L85 PathProgramCache]: Analyzing trace with hash -822489648, now seen corresponding path program 3 times [2024-06-21 21:11:52,246 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:11:52,246 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [741881524] [2024-06-21 21:11:52,246 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:11:52,246 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:11:52,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:11:53,265 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:11:53,265 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:11:53,265 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [741881524] [2024-06-21 21:11:53,265 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [741881524] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:11:53,265 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:11:53,265 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-21 21:11:53,266 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1025749584] [2024-06-21 21:11:53,266 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:11:53,266 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-21 21:11:53,266 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:11:53,266 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-21 21:11:53,266 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2024-06-21 21:11:53,344 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 21:11:53,344 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 147 places, 101 transitions, 765 flow. Second operand has 12 states, 12 states have (on average 7.333333333333333) internal successors, (88), 12 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:11:53,344 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:11:53,344 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 21:11:53,344 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:11:53,608 INFO L124 PetriNetUnfolderBase]: 295/575 cut-off events. [2024-06-21 21:11:53,608 INFO L125 PetriNetUnfolderBase]: For 39343/39343 co-relation queries the response was YES. [2024-06-21 21:11:53,609 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3695 conditions, 575 events. 295/575 cut-off events. For 39343/39343 co-relation queries the response was YES. Maximal size of possible extension queue 52. Compared 2603 event pairs, 67 based on Foata normal form. 2/575 useless extension candidates. Maximal degree in co-relation 3626. Up to 509 conditions per place. [2024-06-21 21:11:53,611 INFO L140 encePairwiseOnDemand]: 20/31 looper letters, 90 selfloop transitions, 24 changer transitions 0/116 dead transitions. [2024-06-21 21:11:53,611 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 153 places, 116 transitions, 1044 flow [2024-06-21 21:11:53,611 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 21:11:53,611 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 21:11:53,611 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 113 transitions. [2024-06-21 21:11:53,612 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36451612903225805 [2024-06-21 21:11:53,612 INFO L175 Difference]: Start difference. First operand has 147 places, 101 transitions, 765 flow. Second operand 10 states and 113 transitions. [2024-06-21 21:11:53,612 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 153 places, 116 transitions, 1044 flow [2024-06-21 21:11:53,687 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 143 places, 116 transitions, 994 flow, removed 2 selfloop flow, removed 10 redundant places. [2024-06-21 21:11:53,688 INFO L231 Difference]: Finished difference. Result has 144 places, 102 transitions, 781 flow [2024-06-21 21:11:53,688 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=715, PETRI_DIFFERENCE_MINUEND_PLACES=134, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=101, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=77, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=781, PETRI_PLACES=144, PETRI_TRANSITIONS=102} [2024-06-21 21:11:53,689 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 114 predicate places. [2024-06-21 21:11:53,689 INFO L495 AbstractCegarLoop]: Abstraction has has 144 places, 102 transitions, 781 flow [2024-06-21 21:11:53,689 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 7.333333333333333) internal successors, (88), 12 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:11:53,689 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:11:53,689 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:11:53,689 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable131 [2024-06-21 21:11:53,689 INFO L420 AbstractCegarLoop]: === Iteration 133 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 21:11:53,690 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:11:53,690 INFO L85 PathProgramCache]: Analyzing trace with hash 889083538, now seen corresponding path program 27 times [2024-06-21 21:11:53,690 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:11:53,690 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [369424992] [2024-06-21 21:11:53,690 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:11:53,690 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:11:53,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:11:54,470 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:11:54,471 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:11:54,471 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [369424992] [2024-06-21 21:11:54,471 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [369424992] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:11:54,471 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:11:54,471 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-21 21:11:54,471 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1473655140] [2024-06-21 21:11:54,471 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:11:54,471 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-21 21:11:54,472 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:11:54,472 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-21 21:11:54,472 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2024-06-21 21:11:54,588 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 21:11:54,588 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 144 places, 102 transitions, 781 flow. Second operand has 12 states, 12 states have (on average 7.333333333333333) internal successors, (88), 12 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:11:54,588 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:11:54,588 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 21:11:54,588 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:11:54,853 INFO L124 PetriNetUnfolderBase]: 307/603 cut-off events. [2024-06-21 21:11:54,854 INFO L125 PetriNetUnfolderBase]: For 44142/44142 co-relation queries the response was YES. [2024-06-21 21:11:54,856 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3780 conditions, 603 events. 307/603 cut-off events. For 44142/44142 co-relation queries the response was YES. Maximal size of possible extension queue 54. Compared 2801 event pairs, 67 based on Foata normal form. 8/609 useless extension candidates. Maximal degree in co-relation 3712. Up to 498 conditions per place. [2024-06-21 21:11:54,857 INFO L140 encePairwiseOnDemand]: 20/31 looper letters, 84 selfloop transitions, 20 changer transitions 13/119 dead transitions. [2024-06-21 21:11:54,857 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 154 places, 119 transitions, 1071 flow [2024-06-21 21:11:54,857 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 21:11:54,857 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 21:11:54,857 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 123 transitions. [2024-06-21 21:11:54,858 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36070381231671556 [2024-06-21 21:11:54,858 INFO L175 Difference]: Start difference. First operand has 144 places, 102 transitions, 781 flow. Second operand 11 states and 123 transitions. [2024-06-21 21:11:54,858 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 154 places, 119 transitions, 1071 flow [2024-06-21 21:11:54,911 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 146 places, 119 transitions, 1007 flow, removed 5 selfloop flow, removed 8 redundant places. [2024-06-21 21:11:54,913 INFO L231 Difference]: Finished difference. Result has 147 places, 98 transitions, 732 flow [2024-06-21 21:11:54,913 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=717, PETRI_DIFFERENCE_MINUEND_PLACES=136, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=102, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=82, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=732, PETRI_PLACES=147, PETRI_TRANSITIONS=98} [2024-06-21 21:11:54,913 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 117 predicate places. [2024-06-21 21:11:54,913 INFO L495 AbstractCegarLoop]: Abstraction has has 147 places, 98 transitions, 732 flow [2024-06-21 21:11:54,913 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 7.333333333333333) internal successors, (88), 12 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:11:54,913 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:11:54,913 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:11:54,914 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable132 [2024-06-21 21:11:54,914 INFO L420 AbstractCegarLoop]: === Iteration 134 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 21:11:54,914 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:11:54,914 INFO L85 PathProgramCache]: Analyzing trace with hash 689781748, now seen corresponding path program 28 times [2024-06-21 21:11:54,914 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:11:54,914 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [29399134] [2024-06-21 21:11:54,914 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:11:54,914 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:11:54,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:11:55,608 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:11:55,608 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:11:55,608 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [29399134] [2024-06-21 21:11:55,608 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [29399134] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:11:55,608 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:11:55,609 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-21 21:11:55,609 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2109603670] [2024-06-21 21:11:55,609 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:11:55,609 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-21 21:11:55,609 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:11:55,609 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-21 21:11:55,609 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2024-06-21 21:11:55,703 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 21:11:55,703 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 147 places, 98 transitions, 732 flow. Second operand has 12 states, 12 states have (on average 7.333333333333333) internal successors, (88), 12 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:11:55,703 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:11:55,703 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 21:11:55,703 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:11:56,045 INFO L124 PetriNetUnfolderBase]: 328/646 cut-off events. [2024-06-21 21:11:56,045 INFO L125 PetriNetUnfolderBase]: For 57450/57450 co-relation queries the response was YES. [2024-06-21 21:11:56,047 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4383 conditions, 646 events. 328/646 cut-off events. For 57450/57450 co-relation queries the response was YES. Maximal size of possible extension queue 53. Compared 3092 event pairs, 80 based on Foata normal form. 8/652 useless extension candidates. Maximal degree in co-relation 4314. Up to 420 conditions per place. [2024-06-21 21:11:56,049 INFO L140 encePairwiseOnDemand]: 20/31 looper letters, 77 selfloop transitions, 35 changer transitions 9/123 dead transitions. [2024-06-21 21:11:56,049 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 151 places, 123 transitions, 1168 flow [2024-06-21 21:11:56,050 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-21 21:11:56,050 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-21 21:11:56,050 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 142 transitions. [2024-06-21 21:11:56,050 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3817204301075269 [2024-06-21 21:11:56,050 INFO L175 Difference]: Start difference. First operand has 147 places, 98 transitions, 732 flow. Second operand 12 states and 142 transitions. [2024-06-21 21:11:56,050 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 151 places, 123 transitions, 1168 flow [2024-06-21 21:11:56,100 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 141 places, 123 transitions, 1112 flow, removed 8 selfloop flow, removed 10 redundant places. [2024-06-21 21:11:56,101 INFO L231 Difference]: Finished difference. Result has 142 places, 94 transitions, 724 flow [2024-06-21 21:11:56,101 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=684, PETRI_DIFFERENCE_MINUEND_PLACES=130, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=98, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=63, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=724, PETRI_PLACES=142, PETRI_TRANSITIONS=94} [2024-06-21 21:11:56,102 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 112 predicate places. [2024-06-21 21:11:56,102 INFO L495 AbstractCegarLoop]: Abstraction has has 142 places, 94 transitions, 724 flow [2024-06-21 21:11:56,102 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 7.333333333333333) internal successors, (88), 12 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:11:56,102 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:11:56,102 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:11:56,102 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable133 [2024-06-21 21:11:56,102 INFO L420 AbstractCegarLoop]: === Iteration 135 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 21:11:56,103 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:11:56,103 INFO L85 PathProgramCache]: Analyzing trace with hash -1466243506, now seen corresponding path program 4 times [2024-06-21 21:11:56,103 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:11:56,103 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2126796314] [2024-06-21 21:11:56,103 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:11:56,103 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:11:56,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:11:56,825 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:11:56,826 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:11:56,826 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2126796314] [2024-06-21 21:11:56,826 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2126796314] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:11:56,826 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:11:56,826 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-21 21:11:56,826 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [470090874] [2024-06-21 21:11:56,826 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:11:56,827 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-21 21:11:56,827 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:11:56,827 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-21 21:11:56,827 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2024-06-21 21:11:56,898 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 21:11:56,898 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 142 places, 94 transitions, 724 flow. Second operand has 12 states, 12 states have (on average 7.333333333333333) internal successors, (88), 12 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:11:56,898 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:11:56,899 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 21:11:56,899 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:11:57,167 INFO L124 PetriNetUnfolderBase]: 308/606 cut-off events. [2024-06-21 21:11:57,167 INFO L125 PetriNetUnfolderBase]: For 44598/44598 co-relation queries the response was YES. [2024-06-21 21:11:57,169 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4166 conditions, 606 events. 308/606 cut-off events. For 44598/44598 co-relation queries the response was YES. Maximal size of possible extension queue 49. Compared 2850 event pairs, 92 based on Foata normal form. 2/606 useless extension candidates. Maximal degree in co-relation 4111. Up to 555 conditions per place. [2024-06-21 21:11:57,171 INFO L140 encePairwiseOnDemand]: 21/31 looper letters, 84 selfloop transitions, 21 changer transitions 0/107 dead transitions. [2024-06-21 21:11:57,171 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 148 places, 107 transitions, 978 flow [2024-06-21 21:11:57,171 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 21:11:57,171 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 21:11:57,172 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 109 transitions. [2024-06-21 21:11:57,172 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.35161290322580646 [2024-06-21 21:11:57,172 INFO L175 Difference]: Start difference. First operand has 142 places, 94 transitions, 724 flow. Second operand 10 states and 109 transitions. [2024-06-21 21:11:57,172 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 148 places, 107 transitions, 978 flow [2024-06-21 21:11:57,215 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 137 places, 107 transitions, 908 flow, removed 2 selfloop flow, removed 11 redundant places. [2024-06-21 21:11:57,216 INFO L231 Difference]: Finished difference. Result has 138 places, 95 transitions, 717 flow [2024-06-21 21:11:57,217 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=654, PETRI_DIFFERENCE_MINUEND_PLACES=128, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=94, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=73, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=717, PETRI_PLACES=138, PETRI_TRANSITIONS=95} [2024-06-21 21:11:57,217 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 108 predicate places. [2024-06-21 21:11:57,217 INFO L495 AbstractCegarLoop]: Abstraction has has 138 places, 95 transitions, 717 flow [2024-06-21 21:11:57,217 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 7.333333333333333) internal successors, (88), 12 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:11:57,217 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:11:57,217 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:11:57,218 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable134 [2024-06-21 21:11:57,218 INFO L420 AbstractCegarLoop]: === Iteration 136 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 21:11:57,218 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:11:57,218 INFO L85 PathProgramCache]: Analyzing trace with hash -1721814194, now seen corresponding path program 5 times [2024-06-21 21:11:57,218 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:11:57,218 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [962612795] [2024-06-21 21:11:57,218 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:11:57,218 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:11:57,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:11:58,139 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:11:58,139 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:11:58,139 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [962612795] [2024-06-21 21:11:58,139 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [962612795] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:11:58,140 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:11:58,140 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-21 21:11:58,140 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1383433912] [2024-06-21 21:11:58,140 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:11:58,140 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-21 21:11:58,140 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:11:58,140 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-21 21:11:58,141 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2024-06-21 21:11:58,220 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 21:11:58,221 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 138 places, 95 transitions, 717 flow. Second operand has 12 states, 12 states have (on average 7.333333333333333) internal successors, (88), 12 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:11:58,221 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:11:58,221 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 21:11:58,221 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:11:58,478 INFO L124 PetriNetUnfolderBase]: 305/601 cut-off events. [2024-06-21 21:11:58,479 INFO L125 PetriNetUnfolderBase]: For 40781/40781 co-relation queries the response was YES. [2024-06-21 21:11:58,480 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4009 conditions, 601 events. 305/601 cut-off events. For 40781/40781 co-relation queries the response was YES. Maximal size of possible extension queue 49. Compared 2798 event pairs, 79 based on Foata normal form. 2/601 useless extension candidates. Maximal degree in co-relation 3955. Up to 535 conditions per place. [2024-06-21 21:11:58,482 INFO L140 encePairwiseOnDemand]: 20/31 looper letters, 83 selfloop transitions, 25 changer transitions 0/110 dead transitions. [2024-06-21 21:11:58,482 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 147 places, 110 transitions, 990 flow [2024-06-21 21:11:58,482 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 21:11:58,482 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 21:11:58,483 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 112 transitions. [2024-06-21 21:11:58,483 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36129032258064514 [2024-06-21 21:11:58,483 INFO L175 Difference]: Start difference. First operand has 138 places, 95 transitions, 717 flow. Second operand 10 states and 112 transitions. [2024-06-21 21:11:58,483 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 147 places, 110 transitions, 990 flow [2024-06-21 21:11:58,526 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 139 places, 110 transitions, 937 flow, removed 6 selfloop flow, removed 8 redundant places. [2024-06-21 21:11:58,527 INFO L231 Difference]: Finished difference. Result has 141 places, 97 transitions, 752 flow [2024-06-21 21:11:58,527 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=666, PETRI_DIFFERENCE_MINUEND_PLACES=130, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=95, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=70, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=752, PETRI_PLACES=141, PETRI_TRANSITIONS=97} [2024-06-21 21:11:58,528 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 111 predicate places. [2024-06-21 21:11:58,528 INFO L495 AbstractCegarLoop]: Abstraction has has 141 places, 97 transitions, 752 flow [2024-06-21 21:11:58,528 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 7.333333333333333) internal successors, (88), 12 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:11:58,528 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:11:58,529 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:11:58,529 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable135 [2024-06-21 21:11:58,529 INFO L420 AbstractCegarLoop]: === Iteration 137 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 21:11:58,529 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:11:58,530 INFO L85 PathProgramCache]: Analyzing trace with hash -967502980, now seen corresponding path program 29 times [2024-06-21 21:11:58,530 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:11:58,530 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [601664185] [2024-06-21 21:11:58,530 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:11:58,530 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:11:58,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:11:59,509 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:11:59,509 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:11:59,509 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [601664185] [2024-06-21 21:11:59,509 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [601664185] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:11:59,509 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:11:59,509 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-21 21:11:59,509 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [950667970] [2024-06-21 21:11:59,510 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:11:59,510 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-21 21:11:59,510 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:11:59,510 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-21 21:11:59,510 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2024-06-21 21:11:59,630 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 21:11:59,630 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 141 places, 97 transitions, 752 flow. Second operand has 12 states, 12 states have (on average 7.333333333333333) internal successors, (88), 12 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:11:59,630 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:11:59,631 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 21:11:59,631 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:11:59,956 INFO L124 PetriNetUnfolderBase]: 321/637 cut-off events. [2024-06-21 21:11:59,957 INFO L125 PetriNetUnfolderBase]: For 50314/50314 co-relation queries the response was YES. [2024-06-21 21:11:59,959 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4191 conditions, 637 events. 321/637 cut-off events. For 50314/50314 co-relation queries the response was YES. Maximal size of possible extension queue 51. Compared 3065 event pairs, 89 based on Foata normal form. 10/645 useless extension candidates. Maximal degree in co-relation 4135. Up to 525 conditions per place. [2024-06-21 21:11:59,960 INFO L140 encePairwiseOnDemand]: 20/31 looper letters, 78 selfloop transitions, 20 changer transitions 15/115 dead transitions. [2024-06-21 21:11:59,960 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 151 places, 115 transitions, 1044 flow [2024-06-21 21:11:59,960 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 21:11:59,960 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 21:11:59,961 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 124 transitions. [2024-06-21 21:11:59,961 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36363636363636365 [2024-06-21 21:11:59,961 INFO L175 Difference]: Start difference. First operand has 141 places, 97 transitions, 752 flow. Second operand 11 states and 124 transitions. [2024-06-21 21:11:59,961 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 151 places, 115 transitions, 1044 flow [2024-06-21 21:12:00,010 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 145 places, 115 transitions, 998 flow, removed 7 selfloop flow, removed 6 redundant places. [2024-06-21 21:12:00,012 INFO L231 Difference]: Finished difference. Result has 146 places, 92 transitions, 712 flow [2024-06-21 21:12:00,012 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=706, PETRI_DIFFERENCE_MINUEND_PLACES=135, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=97, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=77, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=712, PETRI_PLACES=146, PETRI_TRANSITIONS=92} [2024-06-21 21:12:00,012 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 116 predicate places. [2024-06-21 21:12:00,012 INFO L495 AbstractCegarLoop]: Abstraction has has 146 places, 92 transitions, 712 flow [2024-06-21 21:12:00,012 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 7.333333333333333) internal successors, (88), 12 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:12:00,012 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:12:00,013 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:12:00,013 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable136 [2024-06-21 21:12:00,013 INFO L420 AbstractCegarLoop]: === Iteration 138 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 21:12:00,013 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:12:00,013 INFO L85 PathProgramCache]: Analyzing trace with hash -1722029520, now seen corresponding path program 30 times [2024-06-21 21:12:00,013 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:12:00,013 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1519047959] [2024-06-21 21:12:00,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:12:00,014 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:12:00,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:12:00,810 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:12:00,811 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:12:00,811 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1519047959] [2024-06-21 21:12:00,811 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1519047959] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:12:00,811 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:12:00,811 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-21 21:12:00,811 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2131607263] [2024-06-21 21:12:00,811 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:12:00,811 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-21 21:12:00,812 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:12:00,812 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-21 21:12:00,812 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2024-06-21 21:12:00,881 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 21:12:00,881 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 146 places, 92 transitions, 712 flow. Second operand has 12 states, 12 states have (on average 7.333333333333333) internal successors, (88), 12 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:12:00,881 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:12:00,882 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 21:12:00,882 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:12:01,171 INFO L124 PetriNetUnfolderBase]: 351/703 cut-off events. [2024-06-21 21:12:01,171 INFO L125 PetriNetUnfolderBase]: For 67087/67087 co-relation queries the response was YES. [2024-06-21 21:12:01,174 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5092 conditions, 703 events. 351/703 cut-off events. For 67087/67087 co-relation queries the response was YES. Maximal size of possible extension queue 54. Compared 3504 event pairs, 109 based on Foata normal form. 8/709 useless extension candidates. Maximal degree in co-relation 5035. Up to 419 conditions per place. [2024-06-21 21:12:01,175 INFO L140 encePairwiseOnDemand]: 20/31 looper letters, 70 selfloop transitions, 36 changer transitions 7/115 dead transitions. [2024-06-21 21:12:01,175 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 149 places, 115 transitions, 1122 flow [2024-06-21 21:12:01,176 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 21:12:01,176 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 21:12:01,176 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 130 transitions. [2024-06-21 21:12:01,176 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3812316715542522 [2024-06-21 21:12:01,176 INFO L175 Difference]: Start difference. First operand has 146 places, 92 transitions, 712 flow. Second operand 11 states and 130 transitions. [2024-06-21 21:12:01,176 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 149 places, 115 transitions, 1122 flow [2024-06-21 21:12:01,229 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 139 places, 115 transitions, 1066 flow, removed 8 selfloop flow, removed 10 redundant places. [2024-06-21 21:12:01,230 INFO L231 Difference]: Finished difference. Result has 140 places, 90 transitions, 725 flow [2024-06-21 21:12:01,230 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=664, PETRI_DIFFERENCE_MINUEND_PLACES=129, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=92, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=56, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=725, PETRI_PLACES=140, PETRI_TRANSITIONS=90} [2024-06-21 21:12:01,231 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 110 predicate places. [2024-06-21 21:12:01,231 INFO L495 AbstractCegarLoop]: Abstraction has has 140 places, 90 transitions, 725 flow [2024-06-21 21:12:01,231 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 7.333333333333333) internal successors, (88), 12 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:12:01,231 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:12:01,231 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:12:01,231 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable137 [2024-06-21 21:12:01,231 INFO L420 AbstractCegarLoop]: === Iteration 139 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 21:12:01,232 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:12:01,232 INFO L85 PathProgramCache]: Analyzing trace with hash -1721822130, now seen corresponding path program 31 times [2024-06-21 21:12:01,232 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:12:01,232 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [682469436] [2024-06-21 21:12:01,232 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:12:01,232 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:12:01,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:12:02,028 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:12:02,028 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:12:02,028 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [682469436] [2024-06-21 21:12:02,028 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [682469436] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:12:02,029 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:12:02,029 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-21 21:12:02,029 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1581445069] [2024-06-21 21:12:02,029 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:12:02,029 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-21 21:12:02,029 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:12:02,030 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-21 21:12:02,030 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2024-06-21 21:12:02,130 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 21:12:02,131 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 140 places, 90 transitions, 725 flow. Second operand has 12 states, 12 states have (on average 7.333333333333333) internal successors, (88), 12 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:12:02,131 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:12:02,131 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 21:12:02,131 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:12:02,452 INFO L124 PetriNetUnfolderBase]: 357/721 cut-off events. [2024-06-21 21:12:02,453 INFO L125 PetriNetUnfolderBase]: For 66557/66557 co-relation queries the response was YES. [2024-06-21 21:12:02,455 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5009 conditions, 721 events. 357/721 cut-off events. For 66557/66557 co-relation queries the response was YES. Maximal size of possible extension queue 60. Compared 3699 event pairs, 133 based on Foata normal form. 16/735 useless extension candidates. Maximal degree in co-relation 4955. Up to 598 conditions per place. [2024-06-21 21:12:02,456 INFO L140 encePairwiseOnDemand]: 20/31 looper letters, 75 selfloop transitions, 16 changer transitions 16/109 dead transitions. [2024-06-21 21:12:02,456 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 148 places, 109 transitions, 1009 flow [2024-06-21 21:12:02,457 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 21:12:02,457 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 21:12:02,457 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 125 transitions. [2024-06-21 21:12:02,457 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36656891495601174 [2024-06-21 21:12:02,457 INFO L175 Difference]: Start difference. First operand has 140 places, 90 transitions, 725 flow. Second operand 11 states and 125 transitions. [2024-06-21 21:12:02,457 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 148 places, 109 transitions, 1009 flow [2024-06-21 21:12:02,502 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 138 places, 109 transitions, 941 flow, removed 2 selfloop flow, removed 10 redundant places. [2024-06-21 21:12:02,503 INFO L231 Difference]: Finished difference. Result has 139 places, 84 transitions, 644 flow [2024-06-21 21:12:02,503 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=657, PETRI_DIFFERENCE_MINUEND_PLACES=128, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=90, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=74, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=644, PETRI_PLACES=139, PETRI_TRANSITIONS=84} [2024-06-21 21:12:02,504 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 109 predicate places. [2024-06-21 21:12:02,504 INFO L495 AbstractCegarLoop]: Abstraction has has 139 places, 84 transitions, 644 flow [2024-06-21 21:12:02,504 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 7.333333333333333) internal successors, (88), 12 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:12:02,504 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:12:02,504 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:12:02,504 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable138 [2024-06-21 21:12:02,504 INFO L420 AbstractCegarLoop]: === Iteration 140 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 21:12:02,504 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:12:02,505 INFO L85 PathProgramCache]: Analyzing trace with hash -1722023940, now seen corresponding path program 32 times [2024-06-21 21:12:02,505 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:12:02,505 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [292094490] [2024-06-21 21:12:02,505 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:12:02,505 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:12:02,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:12:03,319 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:12:03,320 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:12:03,320 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [292094490] [2024-06-21 21:12:03,320 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [292094490] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:12:03,320 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:12:03,320 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-21 21:12:03,320 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1539696883] [2024-06-21 21:12:03,320 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:12:03,320 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-21 21:12:03,321 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:12:03,321 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-21 21:12:03,321 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2024-06-21 21:12:03,401 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 21:12:03,401 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 139 places, 84 transitions, 644 flow. Second operand has 12 states, 12 states have (on average 7.333333333333333) internal successors, (88), 12 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:12:03,401 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:12:03,401 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 21:12:03,402 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:12:03,674 INFO L124 PetriNetUnfolderBase]: 331/671 cut-off events. [2024-06-21 21:12:03,674 INFO L125 PetriNetUnfolderBase]: For 57765/57765 co-relation queries the response was YES. [2024-06-21 21:12:03,676 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4734 conditions, 671 events. 331/671 cut-off events. For 57765/57765 co-relation queries the response was YES. Maximal size of possible extension queue 56. Compared 3364 event pairs, 119 based on Foata normal form. 10/679 useless extension candidates. Maximal degree in co-relation 4681. Up to 575 conditions per place. [2024-06-21 21:12:03,678 INFO L140 encePairwiseOnDemand]: 20/31 looper letters, 72 selfloop transitions, 16 changer transitions 13/103 dead transitions. [2024-06-21 21:12:03,678 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 143 places, 103 transitions, 916 flow [2024-06-21 21:12:03,678 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 21:12:03,678 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 21:12:03,678 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 124 transitions. [2024-06-21 21:12:03,679 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36363636363636365 [2024-06-21 21:12:03,679 INFO L175 Difference]: Start difference. First operand has 139 places, 84 transitions, 644 flow. Second operand 11 states and 124 transitions. [2024-06-21 21:12:03,679 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 143 places, 103 transitions, 916 flow [2024-06-21 21:12:03,724 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 133 places, 103 transitions, 876 flow, removed 4 selfloop flow, removed 10 redundant places. [2024-06-21 21:12:03,725 INFO L231 Difference]: Finished difference. Result has 134 places, 79 transitions, 596 flow [2024-06-21 21:12:03,725 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=604, PETRI_DIFFERENCE_MINUEND_PLACES=123, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=84, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=68, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=596, PETRI_PLACES=134, PETRI_TRANSITIONS=79} [2024-06-21 21:12:03,725 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 104 predicate places. [2024-06-21 21:12:03,725 INFO L495 AbstractCegarLoop]: Abstraction has has 134 places, 79 transitions, 596 flow [2024-06-21 21:12:03,725 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 7.333333333333333) internal successors, (88), 12 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:12:03,726 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:12:03,726 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:12:03,726 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable139 [2024-06-21 21:12:03,726 INFO L420 AbstractCegarLoop]: === Iteration 141 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 21:12:03,726 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:12:03,726 INFO L85 PathProgramCache]: Analyzing trace with hash -1714395584, now seen corresponding path program 6 times [2024-06-21 21:12:03,726 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:12:03,726 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1084910896] [2024-06-21 21:12:03,727 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:12:03,727 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:12:03,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:12:04,566 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:12:04,566 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:12:04,566 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1084910896] [2024-06-21 21:12:04,566 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1084910896] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:12:04,566 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:12:04,566 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-21 21:12:04,566 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1098527755] [2024-06-21 21:12:04,566 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:12:04,567 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-21 21:12:04,567 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:12:04,567 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-21 21:12:04,567 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2024-06-21 21:12:04,666 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 21:12:04,666 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 134 places, 79 transitions, 596 flow. Second operand has 12 states, 12 states have (on average 7.333333333333333) internal successors, (88), 12 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:12:04,666 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:12:04,667 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 21:12:04,667 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:12:04,879 INFO L124 PetriNetUnfolderBase]: 302/612 cut-off events. [2024-06-21 21:12:04,880 INFO L125 PetriNetUnfolderBase]: For 44561/44561 co-relation queries the response was YES. [2024-06-21 21:12:04,882 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4296 conditions, 612 events. 302/612 cut-off events. For 44561/44561 co-relation queries the response was YES. Maximal size of possible extension queue 49. Compared 2959 event pairs, 114 based on Foata normal form. 2/612 useless extension candidates. Maximal degree in co-relation 4245. Up to 558 conditions per place. [2024-06-21 21:12:04,883 INFO L140 encePairwiseOnDemand]: 21/31 looper letters, 73 selfloop transitions, 17 changer transitions 0/92 dead transitions. [2024-06-21 21:12:04,883 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 138 places, 92 transitions, 820 flow [2024-06-21 21:12:04,884 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 21:12:04,884 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 21:12:04,884 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 108 transitions. [2024-06-21 21:12:04,884 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.34838709677419355 [2024-06-21 21:12:04,884 INFO L175 Difference]: Start difference. First operand has 134 places, 79 transitions, 596 flow. Second operand 10 states and 108 transitions. [2024-06-21 21:12:04,884 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 138 places, 92 transitions, 820 flow [2024-06-21 21:12:04,914 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 127 places, 92 transitions, 782 flow, removed 3 selfloop flow, removed 11 redundant places. [2024-06-21 21:12:04,916 INFO L231 Difference]: Finished difference. Result has 128 places, 80 transitions, 614 flow [2024-06-21 21:12:04,916 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=558, PETRI_DIFFERENCE_MINUEND_PLACES=118, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=79, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=62, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=614, PETRI_PLACES=128, PETRI_TRANSITIONS=80} [2024-06-21 21:12:04,916 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 98 predicate places. [2024-06-21 21:12:04,916 INFO L495 AbstractCegarLoop]: Abstraction has has 128 places, 80 transitions, 614 flow [2024-06-21 21:12:04,916 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 7.333333333333333) internal successors, (88), 12 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:12:04,916 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:12:04,916 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:12:04,917 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable140 [2024-06-21 21:12:04,917 INFO L420 AbstractCegarLoop]: === Iteration 142 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 21:12:04,917 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:12:04,917 INFO L85 PathProgramCache]: Analyzing trace with hash 1809817024, now seen corresponding path program 33 times [2024-06-21 21:12:04,917 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:12:04,917 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2050047934] [2024-06-21 21:12:04,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:12:04,917 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:12:04,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:12:05,730 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:12:05,730 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:12:05,730 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2050047934] [2024-06-21 21:12:05,731 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2050047934] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:12:05,731 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:12:05,731 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-21 21:12:05,731 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2007893810] [2024-06-21 21:12:05,731 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:12:05,731 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-21 21:12:05,731 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:12:05,732 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-21 21:12:05,732 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2024-06-21 21:12:05,830 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 21:12:05,831 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 128 places, 80 transitions, 614 flow. Second operand has 12 states, 12 states have (on average 7.333333333333333) internal successors, (88), 12 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:12:05,831 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:12:05,831 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 21:12:05,831 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:12:06,167 INFO L124 PetriNetUnfolderBase]: 289/589 cut-off events. [2024-06-21 21:12:06,167 INFO L125 PetriNetUnfolderBase]: For 38755/38755 co-relation queries the response was YES. [2024-06-21 21:12:06,169 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3752 conditions, 589 events. 289/589 cut-off events. For 38755/38755 co-relation queries the response was YES. Maximal size of possible extension queue 46. Compared 2801 event pairs, 101 based on Foata normal form. 10/597 useless extension candidates. Maximal degree in co-relation 3703. Up to 505 conditions per place. [2024-06-21 21:12:06,170 INFO L140 encePairwiseOnDemand]: 20/31 looper letters, 71 selfloop transitions, 14 changer transitions 11/98 dead transitions. [2024-06-21 21:12:06,170 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 138 places, 98 transitions, 872 flow [2024-06-21 21:12:06,170 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 21:12:06,170 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 21:12:06,171 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 120 transitions. [2024-06-21 21:12:06,171 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3519061583577713 [2024-06-21 21:12:06,171 INFO L175 Difference]: Start difference. First operand has 128 places, 80 transitions, 614 flow. Second operand 11 states and 120 transitions. [2024-06-21 21:12:06,171 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 138 places, 98 transitions, 872 flow [2024-06-21 21:12:06,201 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 130 places, 98 transitions, 826 flow, removed 7 selfloop flow, removed 8 redundant places. [2024-06-21 21:12:06,202 INFO L231 Difference]: Finished difference. Result has 131 places, 77 transitions, 570 flow [2024-06-21 21:12:06,202 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=568, PETRI_DIFFERENCE_MINUEND_PLACES=120, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=80, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=66, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=570, PETRI_PLACES=131, PETRI_TRANSITIONS=77} [2024-06-21 21:12:06,202 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 101 predicate places. [2024-06-21 21:12:06,203 INFO L495 AbstractCegarLoop]: Abstraction has has 131 places, 77 transitions, 570 flow [2024-06-21 21:12:06,203 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 7.333333333333333) internal successors, (88), 12 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:12:06,203 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:12:06,203 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:12:06,203 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable141 [2024-06-21 21:12:06,203 INFO L420 AbstractCegarLoop]: === Iteration 143 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 21:12:06,203 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:12:06,204 INFO L85 PathProgramCache]: Analyzing trace with hash -1152534976, now seen corresponding path program 7 times [2024-06-21 21:12:06,204 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:12:06,204 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [84336612] [2024-06-21 21:12:06,204 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:12:06,204 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:12:06,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:12:07,084 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:12:07,084 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:12:07,084 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [84336612] [2024-06-21 21:12:07,084 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [84336612] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:12:07,084 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:12:07,085 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-21 21:12:07,085 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1707552806] [2024-06-21 21:12:07,085 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:12:07,085 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-21 21:12:07,085 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:12:07,085 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-21 21:12:07,085 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2024-06-21 21:12:07,162 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 21:12:07,163 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 131 places, 77 transitions, 570 flow. Second operand has 12 states, 12 states have (on average 7.333333333333333) internal successors, (88), 12 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:12:07,163 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:12:07,163 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 21:12:07,163 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:12:07,439 INFO L124 PetriNetUnfolderBase]: 267/547 cut-off events. [2024-06-21 21:12:07,439 INFO L125 PetriNetUnfolderBase]: For 34839/34839 co-relation queries the response was YES. [2024-06-21 21:12:07,441 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3611 conditions, 547 events. 267/547 cut-off events. For 34839/34839 co-relation queries the response was YES. Maximal size of possible extension queue 41. Compared 2553 event pairs, 95 based on Foata normal form. 2/547 useless extension candidates. Maximal degree in co-relation 3561. Up to 480 conditions per place. [2024-06-21 21:12:07,442 INFO L140 encePairwiseOnDemand]: 21/31 looper letters, 66 selfloop transitions, 22 changer transitions 0/90 dead transitions. [2024-06-21 21:12:07,442 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 137 places, 90 transitions, 792 flow [2024-06-21 21:12:07,443 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 21:12:07,443 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 21:12:07,443 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 110 transitions. [2024-06-21 21:12:07,443 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3548387096774194 [2024-06-21 21:12:07,443 INFO L175 Difference]: Start difference. First operand has 131 places, 77 transitions, 570 flow. Second operand 10 states and 110 transitions. [2024-06-21 21:12:07,443 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 137 places, 90 transitions, 792 flow [2024-06-21 21:12:07,471 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 127 places, 90 transitions, 760 flow, removed 2 selfloop flow, removed 10 redundant places. [2024-06-21 21:12:07,473 INFO L231 Difference]: Finished difference. Result has 128 places, 78 transitions, 606 flow [2024-06-21 21:12:07,473 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=538, PETRI_DIFFERENCE_MINUEND_PLACES=118, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=77, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=55, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=606, PETRI_PLACES=128, PETRI_TRANSITIONS=78} [2024-06-21 21:12:07,473 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 98 predicate places. [2024-06-21 21:12:07,473 INFO L495 AbstractCegarLoop]: Abstraction has has 128 places, 78 transitions, 606 flow [2024-06-21 21:12:07,473 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 7.333333333333333) internal successors, (88), 12 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:12:07,473 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:12:07,473 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:12:07,474 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable142 [2024-06-21 21:12:07,474 INFO L420 AbstractCegarLoop]: === Iteration 144 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 21:12:07,474 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:12:07,474 INFO L85 PathProgramCache]: Analyzing trace with hash 689787328, now seen corresponding path program 34 times [2024-06-21 21:12:07,474 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:12:07,474 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1342395374] [2024-06-21 21:12:07,474 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:12:07,474 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:12:07,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:12:08,283 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:12:08,283 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:12:08,283 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1342395374] [2024-06-21 21:12:08,283 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1342395374] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:12:08,283 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:12:08,284 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-21 21:12:08,284 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [146053863] [2024-06-21 21:12:08,284 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:12:08,284 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-21 21:12:08,284 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:12:08,284 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-21 21:12:08,284 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2024-06-21 21:12:08,388 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 21:12:08,388 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 128 places, 78 transitions, 606 flow. Second operand has 12 states, 12 states have (on average 7.333333333333333) internal successors, (88), 12 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:12:08,388 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:12:08,388 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 21:12:08,388 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:12:08,672 INFO L124 PetriNetUnfolderBase]: 254/524 cut-off events. [2024-06-21 21:12:08,672 INFO L125 PetriNetUnfolderBase]: For 32165/32165 co-relation queries the response was YES. [2024-06-21 21:12:08,674 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3150 conditions, 524 events. 254/524 cut-off events. For 32165/32165 co-relation queries the response was YES. Maximal size of possible extension queue 40. Compared 2400 event pairs, 84 based on Foata normal form. 10/532 useless extension candidates. Maximal degree in co-relation 3101. Up to 385 conditions per place. [2024-06-21 21:12:08,675 INFO L140 encePairwiseOnDemand]: 19/31 looper letters, 53 selfloop transitions, 29 changer transitions 13/97 dead transitions. [2024-06-21 21:12:08,675 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 139 places, 97 transitions, 866 flow [2024-06-21 21:12:08,675 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-21 21:12:08,676 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-21 21:12:08,676 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 134 transitions. [2024-06-21 21:12:08,676 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3602150537634409 [2024-06-21 21:12:08,676 INFO L175 Difference]: Start difference. First operand has 128 places, 78 transitions, 606 flow. Second operand 12 states and 134 transitions. [2024-06-21 21:12:08,676 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 139 places, 97 transitions, 866 flow [2024-06-21 21:12:08,706 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 131 places, 97 transitions, 808 flow, removed 8 selfloop flow, removed 8 redundant places. [2024-06-21 21:12:08,707 INFO L231 Difference]: Finished difference. Result has 132 places, 74 transitions, 581 flow [2024-06-21 21:12:08,707 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=548, PETRI_DIFFERENCE_MINUEND_PLACES=120, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=78, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=49, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=581, PETRI_PLACES=132, PETRI_TRANSITIONS=74} [2024-06-21 21:12:08,707 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 102 predicate places. [2024-06-21 21:12:08,708 INFO L495 AbstractCegarLoop]: Abstraction has has 132 places, 74 transitions, 581 flow [2024-06-21 21:12:08,708 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 7.333333333333333) internal successors, (88), 12 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:12:08,708 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:12:08,708 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:12:08,708 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable143 [2024-06-21 21:12:08,708 INFO L420 AbstractCegarLoop]: === Iteration 145 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 21:12:08,708 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:12:08,709 INFO L85 PathProgramCache]: Analyzing trace with hash -1466510912, now seen corresponding path program 35 times [2024-06-21 21:12:08,709 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:12:08,709 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1404257589] [2024-06-21 21:12:08,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:12:08,709 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:12:08,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:12:09,686 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:12:09,686 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:12:09,686 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1404257589] [2024-06-21 21:12:09,686 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1404257589] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:12:09,687 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:12:09,687 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-21 21:12:09,687 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2089622225] [2024-06-21 21:12:09,687 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:12:09,687 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-21 21:12:09,687 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:12:09,687 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-21 21:12:09,688 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2024-06-21 21:12:09,770 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 21:12:09,770 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 132 places, 74 transitions, 581 flow. Second operand has 12 states, 12 states have (on average 7.333333333333333) internal successors, (88), 12 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:12:09,770 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:12:09,771 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 21:12:09,771 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:12:10,032 INFO L124 PetriNetUnfolderBase]: 224/470 cut-off events. [2024-06-21 21:12:10,033 INFO L125 PetriNetUnfolderBase]: For 30502/30502 co-relation queries the response was YES. [2024-06-21 21:12:10,034 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2574 conditions, 470 events. 224/470 cut-off events. For 30502/30502 co-relation queries the response was YES. Maximal size of possible extension queue 35. Compared 2105 event pairs, 75 based on Foata normal form. 16/484 useless extension candidates. Maximal degree in co-relation 2524. Up to 343 conditions per place. [2024-06-21 21:12:10,035 INFO L140 encePairwiseOnDemand]: 20/31 looper letters, 56 selfloop transitions, 15 changer transitions 19/92 dead transitions. [2024-06-21 21:12:10,035 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 136 places, 92 transitions, 827 flow [2024-06-21 21:12:10,035 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 21:12:10,035 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 21:12:10,036 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 123 transitions. [2024-06-21 21:12:10,036 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36070381231671556 [2024-06-21 21:12:10,036 INFO L175 Difference]: Start difference. First operand has 132 places, 74 transitions, 581 flow. Second operand 11 states and 123 transitions. [2024-06-21 21:12:10,036 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 136 places, 92 transitions, 827 flow [2024-06-21 21:12:10,059 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 125 places, 92 transitions, 763 flow, removed 3 selfloop flow, removed 11 redundant places. [2024-06-21 21:12:10,060 INFO L231 Difference]: Finished difference. Result has 126 places, 65 transitions, 482 flow [2024-06-21 21:12:10,060 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=517, PETRI_DIFFERENCE_MINUEND_PLACES=115, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=74, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=59, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=482, PETRI_PLACES=126, PETRI_TRANSITIONS=65} [2024-06-21 21:12:10,060 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 96 predicate places. [2024-06-21 21:12:10,061 INFO L495 AbstractCegarLoop]: Abstraction has has 126 places, 65 transitions, 482 flow [2024-06-21 21:12:10,061 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 7.333333333333333) internal successors, (88), 12 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:12:10,061 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:12:10,061 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:12:10,061 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable144 [2024-06-21 21:12:10,061 INFO L420 AbstractCegarLoop]: === Iteration 146 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 21:12:10,061 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:12:10,061 INFO L85 PathProgramCache]: Analyzing trace with hash 689637598, now seen corresponding path program 36 times [2024-06-21 21:12:10,062 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:12:10,062 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [886258911] [2024-06-21 21:12:10,062 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:12:10,062 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:12:10,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:12:10,813 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:12:10,813 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:12:10,814 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [886258911] [2024-06-21 21:12:10,814 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [886258911] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:12:10,814 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:12:10,814 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-21 21:12:10,814 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [716103330] [2024-06-21 21:12:10,814 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:12:10,815 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-21 21:12:10,815 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:12:10,815 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-21 21:12:10,815 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2024-06-21 21:12:10,920 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 21:12:10,920 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 126 places, 65 transitions, 482 flow. Second operand has 12 states, 12 states have (on average 7.333333333333333) internal successors, (88), 12 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:12:10,921 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:12:10,921 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 21:12:10,921 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:12:11,176 INFO L124 PetriNetUnfolderBase]: 173/377 cut-off events. [2024-06-21 21:12:11,176 INFO L125 PetriNetUnfolderBase]: For 19340/19340 co-relation queries the response was YES. [2024-06-21 21:12:11,177 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2005 conditions, 377 events. 173/377 cut-off events. For 19340/19340 co-relation queries the response was YES. Maximal size of possible extension queue 28. Compared 1577 event pairs, 53 based on Foata normal form. 8/383 useless extension candidates. Maximal degree in co-relation 1957. Up to 236 conditions per place. [2024-06-21 21:12:11,178 INFO L140 encePairwiseOnDemand]: 20/31 looper letters, 57 selfloop transitions, 13 changer transitions 13/85 dead transitions. [2024-06-21 21:12:11,178 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 129 places, 85 transitions, 776 flow [2024-06-21 21:12:11,178 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 21:12:11,178 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 21:12:11,178 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 125 transitions. [2024-06-21 21:12:11,179 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36656891495601174 [2024-06-21 21:12:11,179 INFO L175 Difference]: Start difference. First operand has 126 places, 65 transitions, 482 flow. Second operand 11 states and 125 transitions. [2024-06-21 21:12:11,179 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 129 places, 85 transitions, 776 flow [2024-06-21 21:12:11,197 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 115 places, 85 transitions, 708 flow, removed 12 selfloop flow, removed 14 redundant places. [2024-06-21 21:12:11,198 INFO L231 Difference]: Finished difference. Result has 116 places, 59 transitions, 411 flow [2024-06-21 21:12:11,198 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=422, PETRI_DIFFERENCE_MINUEND_PLACES=105, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=65, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=52, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=411, PETRI_PLACES=116, PETRI_TRANSITIONS=59} [2024-06-21 21:12:11,198 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 86 predicate places. [2024-06-21 21:12:11,198 INFO L495 AbstractCegarLoop]: Abstraction has has 116 places, 59 transitions, 411 flow [2024-06-21 21:12:11,198 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 7.333333333333333) internal successors, (88), 12 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:12:11,198 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:12:11,198 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:12:11,199 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable145 [2024-06-21 21:12:11,199 INFO L420 AbstractCegarLoop]: === Iteration 147 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 21:12:11,199 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:12:11,199 INFO L85 PathProgramCache]: Analyzing trace with hash -1141493086, now seen corresponding path program 8 times [2024-06-21 21:12:11,199 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:12:11,199 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [103156163] [2024-06-21 21:12:11,199 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:12:11,200 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:12:11,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:12:12,146 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:12:12,147 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:12:12,147 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [103156163] [2024-06-21 21:12:12,147 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [103156163] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:12:12,147 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:12:12,147 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-21 21:12:12,147 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [691542689] [2024-06-21 21:12:12,147 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:12:12,148 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-21 21:12:12,148 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:12:12,148 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-21 21:12:12,148 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2024-06-21 21:12:12,266 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 21:12:12,266 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 116 places, 59 transitions, 411 flow. Second operand has 12 states, 12 states have (on average 7.333333333333333) internal successors, (88), 12 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:12:12,267 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:12:12,267 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 21:12:12,267 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:12:12,504 INFO L124 PetriNetUnfolderBase]: 146/320 cut-off events. [2024-06-21 21:12:12,504 INFO L125 PetriNetUnfolderBase]: For 12413/12413 co-relation queries the response was YES. [2024-06-21 21:12:12,505 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1655 conditions, 320 events. 146/320 cut-off events. For 12413/12413 co-relation queries the response was YES. Maximal size of possible extension queue 24. Compared 1243 event pairs, 50 based on Foata normal form. 2/320 useless extension candidates. Maximal degree in co-relation 1611. Up to 275 conditions per place. [2024-06-21 21:12:12,505 INFO L140 encePairwiseOnDemand]: 21/31 looper letters, 53 selfloop transitions, 16 changer transitions 0/71 dead transitions. [2024-06-21 21:12:12,505 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 118 places, 71 transitions, 575 flow [2024-06-21 21:12:12,506 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 21:12:12,506 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 21:12:12,506 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 106 transitions. [2024-06-21 21:12:12,506 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3419354838709677 [2024-06-21 21:12:12,506 INFO L175 Difference]: Start difference. First operand has 116 places, 59 transitions, 411 flow. Second operand 10 states and 106 transitions. [2024-06-21 21:12:12,506 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 118 places, 71 transitions, 575 flow [2024-06-21 21:12:12,516 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 105 places, 71 transitions, 525 flow, removed 9 selfloop flow, removed 13 redundant places. [2024-06-21 21:12:12,517 INFO L231 Difference]: Finished difference. Result has 106 places, 59 transitions, 397 flow [2024-06-21 21:12:12,517 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=361, PETRI_DIFFERENCE_MINUEND_PLACES=96, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=59, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=397, PETRI_PLACES=106, PETRI_TRANSITIONS=59} [2024-06-21 21:12:12,517 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 76 predicate places. [2024-06-21 21:12:12,517 INFO L495 AbstractCegarLoop]: Abstraction has has 106 places, 59 transitions, 397 flow [2024-06-21 21:12:12,518 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 7.333333333333333) internal successors, (88), 12 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:12:12,518 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:12:12,518 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:12:12,518 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable146 [2024-06-21 21:12:12,518 INFO L420 AbstractCegarLoop]: === Iteration 148 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 21:12:12,518 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:12:12,518 INFO L85 PathProgramCache]: Analyzing trace with hash 2094841379, now seen corresponding path program 1 times [2024-06-21 21:12:12,519 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:12:12,519 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [956350331] [2024-06-21 21:12:12,519 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:12:12,519 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:12:12,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:12:13,637 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:12:13,638 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:12:13,638 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [956350331] [2024-06-21 21:12:13,638 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [956350331] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:12:13,638 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:12:13,638 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2024-06-21 21:12:13,638 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1511762157] [2024-06-21 21:12:13,638 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:12:13,639 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-06-21 21:12:13,639 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:12:13,639 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-06-21 21:12:13,639 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2024-06-21 21:12:13,784 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 21:12:13,785 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 106 places, 59 transitions, 397 flow. Second operand has 13 states, 13 states have (on average 7.3076923076923075) internal successors, (95), 13 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:12:13,785 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:12:13,785 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 21:12:13,785 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:12:14,040 INFO L124 PetriNetUnfolderBase]: 154/340 cut-off events. [2024-06-21 21:12:14,041 INFO L125 PetriNetUnfolderBase]: For 10909/10909 co-relation queries the response was YES. [2024-06-21 21:12:14,041 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1581 conditions, 340 events. 154/340 cut-off events. For 10909/10909 co-relation queries the response was YES. Maximal size of possible extension queue 24. Compared 1367 event pairs, 54 based on Foata normal form. 6/344 useless extension candidates. Maximal degree in co-relation 1543. Up to 207 conditions per place. [2024-06-21 21:12:14,042 INFO L140 encePairwiseOnDemand]: 21/31 looper letters, 36 selfloop transitions, 8 changer transitions 30/76 dead transitions. [2024-06-21 21:12:14,042 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 116 places, 76 transitions, 587 flow [2024-06-21 21:12:14,042 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 21:12:14,042 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 21:12:14,043 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 117 transitions. [2024-06-21 21:12:14,043 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.34310850439882695 [2024-06-21 21:12:14,043 INFO L175 Difference]: Start difference. First operand has 106 places, 59 transitions, 397 flow. Second operand 11 states and 117 transitions. [2024-06-21 21:12:14,043 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 116 places, 76 transitions, 587 flow [2024-06-21 21:12:14,052 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 106 places, 76 transitions, 525 flow, removed 6 selfloop flow, removed 10 redundant places. [2024-06-21 21:12:14,053 INFO L231 Difference]: Finished difference. Result has 107 places, 43 transitions, 273 flow [2024-06-21 21:12:14,053 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=335, PETRI_DIFFERENCE_MINUEND_PLACES=96, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=59, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=273, PETRI_PLACES=107, PETRI_TRANSITIONS=43} [2024-06-21 21:12:14,053 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 77 predicate places. [2024-06-21 21:12:14,053 INFO L495 AbstractCegarLoop]: Abstraction has has 107 places, 43 transitions, 273 flow [2024-06-21 21:12:14,053 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 7.3076923076923075) internal successors, (95), 13 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:12:14,053 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:12:14,054 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:12:14,054 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable147 [2024-06-21 21:12:14,054 INFO L420 AbstractCegarLoop]: === Iteration 149 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 21:12:14,054 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:12:14,054 INFO L85 PathProgramCache]: Analyzing trace with hash -1368845055, now seen corresponding path program 2 times [2024-06-21 21:12:14,054 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:12:14,054 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1460318998] [2024-06-21 21:12:14,054 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:12:14,055 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:12:14,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:12:15,045 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:12:15,046 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:12:15,046 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1460318998] [2024-06-21 21:12:15,046 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1460318998] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:12:15,046 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:12:15,046 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2024-06-21 21:12:15,046 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [841635807] [2024-06-21 21:12:15,046 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:12:15,047 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-06-21 21:12:15,047 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:12:15,047 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-06-21 21:12:15,047 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2024-06-21 21:12:15,198 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 21:12:15,198 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 107 places, 43 transitions, 273 flow. Second operand has 13 states, 13 states have (on average 7.3076923076923075) internal successors, (95), 13 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:12:15,198 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:12:15,198 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 21:12:15,198 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:12:15,430 INFO L124 PetriNetUnfolderBase]: 124/273 cut-off events. [2024-06-21 21:12:15,430 INFO L125 PetriNetUnfolderBase]: For 11508/11508 co-relation queries the response was YES. [2024-06-21 21:12:15,431 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1317 conditions, 273 events. 124/273 cut-off events. For 11508/11508 co-relation queries the response was YES. Maximal size of possible extension queue 23. Compared 1037 event pairs, 50 based on Foata normal form. 6/278 useless extension candidates. Maximal degree in co-relation 1279. Up to 201 conditions per place. [2024-06-21 21:12:15,431 INFO L140 encePairwiseOnDemand]: 20/31 looper letters, 31 selfloop transitions, 9 changer transitions 16/58 dead transitions. [2024-06-21 21:12:15,431 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 100 places, 58 transitions, 419 flow [2024-06-21 21:12:15,432 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-21 21:12:15,432 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-21 21:12:15,432 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 119 transitions. [2024-06-21 21:12:15,432 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.31989247311827956 [2024-06-21 21:12:15,432 INFO L175 Difference]: Start difference. First operand has 107 places, 43 transitions, 273 flow. Second operand 12 states and 119 transitions. [2024-06-21 21:12:15,432 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 100 places, 58 transitions, 419 flow [2024-06-21 21:12:15,437 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 82 places, 58 transitions, 375 flow, removed 11 selfloop flow, removed 18 redundant places. [2024-06-21 21:12:15,438 INFO L231 Difference]: Finished difference. Result has 83 places, 37 transitions, 210 flow [2024-06-21 21:12:15,438 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=229, PETRI_DIFFERENCE_MINUEND_PLACES=71, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=210, PETRI_PLACES=83, PETRI_TRANSITIONS=37} [2024-06-21 21:12:15,438 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 53 predicate places. [2024-06-21 21:12:15,438 INFO L495 AbstractCegarLoop]: Abstraction has has 83 places, 37 transitions, 210 flow [2024-06-21 21:12:15,438 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 7.3076923076923075) internal successors, (95), 13 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:12:15,439 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:12:15,439 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:12:15,439 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable148 [2024-06-21 21:12:15,439 INFO L420 AbstractCegarLoop]: === Iteration 150 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 21:12:15,439 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:12:15,439 INFO L85 PathProgramCache]: Analyzing trace with hash 2025812975, now seen corresponding path program 3 times [2024-06-21 21:12:15,439 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:12:15,439 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2126810053] [2024-06-21 21:12:15,440 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:12:15,440 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:12:15,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:12:16,540 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:12:16,540 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:12:16,540 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2126810053] [2024-06-21 21:12:16,541 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2126810053] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:12:16,541 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:12:16,541 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2024-06-21 21:12:16,541 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [535300653] [2024-06-21 21:12:16,541 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:12:16,541 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-06-21 21:12:16,541 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:12:16,542 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-06-21 21:12:16,542 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2024-06-21 21:12:16,694 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 21:12:16,695 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 83 places, 37 transitions, 210 flow. Second operand has 13 states, 13 states have (on average 7.3076923076923075) internal successors, (95), 13 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:12:16,695 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:12:16,695 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 21:12:16,695 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:12:16,932 INFO L124 PetriNetUnfolderBase]: 109/244 cut-off events. [2024-06-21 21:12:16,933 INFO L125 PetriNetUnfolderBase]: For 5250/5250 co-relation queries the response was YES. [2024-06-21 21:12:16,933 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1035 conditions, 244 events. 109/244 cut-off events. For 5250/5250 co-relation queries the response was YES. Maximal size of possible extension queue 23. Compared 885 event pairs, 48 based on Foata normal form. 6/249 useless extension candidates. Maximal degree in co-relation 1008. Up to 160 conditions per place. [2024-06-21 21:12:16,934 INFO L140 encePairwiseOnDemand]: 21/31 looper letters, 25 selfloop transitions, 7 changer transitions 17/51 dead transitions. [2024-06-21 21:12:16,934 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 86 places, 51 transitions, 340 flow [2024-06-21 21:12:16,934 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 21:12:16,934 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 21:12:16,934 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 111 transitions. [2024-06-21 21:12:16,934 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3255131964809384 [2024-06-21 21:12:16,935 INFO L175 Difference]: Start difference. First operand has 83 places, 37 transitions, 210 flow. Second operand 11 states and 111 transitions. [2024-06-21 21:12:16,935 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 86 places, 51 transitions, 340 flow [2024-06-21 21:12:16,938 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 73 places, 51 transitions, 306 flow, removed 4 selfloop flow, removed 13 redundant places. [2024-06-21 21:12:16,938 INFO L231 Difference]: Finished difference. Result has 74 places, 31 transitions, 165 flow [2024-06-21 21:12:16,938 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=176, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=165, PETRI_PLACES=74, PETRI_TRANSITIONS=31} [2024-06-21 21:12:16,939 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 44 predicate places. [2024-06-21 21:12:16,939 INFO L495 AbstractCegarLoop]: Abstraction has has 74 places, 31 transitions, 165 flow [2024-06-21 21:12:16,939 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 7.3076923076923075) internal successors, (95), 13 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:12:16,939 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:12:16,939 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:12:16,939 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable149 [2024-06-21 21:12:16,939 INFO L420 AbstractCegarLoop]: === Iteration 151 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 21:12:16,940 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:12:16,940 INFO L85 PathProgramCache]: Analyzing trace with hash -1026546465, now seen corresponding path program 4 times [2024-06-21 21:12:16,940 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:12:16,940 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [211557153] [2024-06-21 21:12:16,940 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:12:16,940 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:12:16,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:12:17,843 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:12:17,843 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:12:17,843 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [211557153] [2024-06-21 21:12:17,843 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [211557153] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:12:17,843 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:12:17,844 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-21 21:12:17,844 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [381229444] [2024-06-21 21:12:17,844 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:12:17,844 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-21 21:12:17,844 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:12:17,844 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-21 21:12:17,844 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2024-06-21 21:12:17,969 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 21:12:17,970 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 74 places, 31 transitions, 165 flow. Second operand has 12 states, 12 states have (on average 7.416666666666667) internal successors, (89), 12 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:12:17,970 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:12:17,970 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 21:12:17,970 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:12:18,197 INFO L124 PetriNetUnfolderBase]: 80/181 cut-off events. [2024-06-21 21:12:18,197 INFO L125 PetriNetUnfolderBase]: For 2900/2900 co-relation queries the response was YES. [2024-06-21 21:12:18,198 INFO L83 FinitePrefix]: Finished finitePrefix Result has 701 conditions, 181 events. 80/181 cut-off events. For 2900/2900 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 570 event pairs, 31 based on Foata normal form. 6/186 useless extension candidates. Maximal degree in co-relation 678. Up to 112 conditions per place. [2024-06-21 21:12:18,198 INFO L140 encePairwiseOnDemand]: 21/31 looper letters, 21 selfloop transitions, 5 changer transitions 17/45 dead transitions. [2024-06-21 21:12:18,198 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 74 places, 45 transitions, 281 flow [2024-06-21 21:12:18,198 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 21:12:18,199 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 21:12:18,199 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 107 transitions. [2024-06-21 21:12:18,199 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.31378299120234604 [2024-06-21 21:12:18,199 INFO L175 Difference]: Start difference. First operand has 74 places, 31 transitions, 165 flow. Second operand 11 states and 107 transitions. [2024-06-21 21:12:18,199 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 74 places, 45 transitions, 281 flow [2024-06-21 21:12:18,201 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 45 transitions, 257 flow, removed 5 selfloop flow, removed 10 redundant places. [2024-06-21 21:12:18,201 INFO L231 Difference]: Finished difference. Result has 65 places, 25 transitions, 127 flow [2024-06-21 21:12:18,201 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=141, PETRI_DIFFERENCE_MINUEND_PLACES=54, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=31, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=127, PETRI_PLACES=65, PETRI_TRANSITIONS=25} [2024-06-21 21:12:18,201 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 35 predicate places. [2024-06-21 21:12:18,202 INFO L495 AbstractCegarLoop]: Abstraction has has 65 places, 25 transitions, 127 flow [2024-06-21 21:12:18,202 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 7.416666666666667) internal successors, (89), 12 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:12:18,202 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:12:18,202 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:12:18,202 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable150 [2024-06-21 21:12:18,202 INFO L420 AbstractCegarLoop]: === Iteration 152 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 21:12:18,202 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:12:18,202 INFO L85 PathProgramCache]: Analyzing trace with hash -1606943019, now seen corresponding path program 5 times [2024-06-21 21:12:18,203 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:12:18,203 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [106721847] [2024-06-21 21:12:18,203 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:12:18,203 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:12:18,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:12:19,491 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:12:19,491 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:12:19,491 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [106721847] [2024-06-21 21:12:19,491 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [106721847] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:12:19,491 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:12:19,492 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2024-06-21 21:12:19,492 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [245179045] [2024-06-21 21:12:19,492 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:12:19,492 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-06-21 21:12:19,492 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:12:19,492 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-06-21 21:12:19,493 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2024-06-21 21:12:19,651 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 21:12:19,651 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 65 places, 25 transitions, 127 flow. Second operand has 13 states, 13 states have (on average 7.3076923076923075) internal successors, (95), 13 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:12:19,651 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:12:19,651 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 21:12:19,651 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:12:19,914 INFO L124 PetriNetUnfolderBase]: 49/116 cut-off events. [2024-06-21 21:12:19,914 INFO L125 PetriNetUnfolderBase]: For 1166/1166 co-relation queries the response was YES. [2024-06-21 21:12:19,914 INFO L83 FinitePrefix]: Finished finitePrefix Result has 403 conditions, 116 events. 49/116 cut-off events. For 1166/1166 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 273 event pairs, 16 based on Foata normal form. 6/121 useless extension candidates. Maximal degree in co-relation 384. Up to 52 conditions per place. [2024-06-21 21:12:19,915 INFO L140 encePairwiseOnDemand]: 21/31 looper letters, 18 selfloop transitions, 7 changer transitions 11/38 dead transitions. [2024-06-21 21:12:19,915 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 65 places, 38 transitions, 229 flow [2024-06-21 21:12:19,915 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 21:12:19,915 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 21:12:19,915 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 103 transitions. [2024-06-21 21:12:19,915 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3020527859237537 [2024-06-21 21:12:19,915 INFO L175 Difference]: Start difference. First operand has 65 places, 25 transitions, 127 flow. Second operand 11 states and 103 transitions. [2024-06-21 21:12:19,916 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 65 places, 38 transitions, 229 flow [2024-06-21 21:12:19,916 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 55 places, 38 transitions, 205 flow, removed 6 selfloop flow, removed 10 redundant places. [2024-06-21 21:12:19,917 INFO L231 Difference]: Finished difference. Result has 56 places, 22 transitions, 105 flow [2024-06-21 21:12:19,917 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=105, PETRI_DIFFERENCE_MINUEND_PLACES=45, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=25, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=18, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=105, PETRI_PLACES=56, PETRI_TRANSITIONS=22} [2024-06-21 21:12:19,917 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 26 predicate places. [2024-06-21 21:12:19,917 INFO L495 AbstractCegarLoop]: Abstraction has has 56 places, 22 transitions, 105 flow [2024-06-21 21:12:19,917 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 7.3076923076923075) internal successors, (95), 13 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:12:19,917 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:12:19,918 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:12:19,918 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable151 [2024-06-21 21:12:19,918 INFO L420 AbstractCegarLoop]: === Iteration 153 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 21:12:19,918 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:12:19,918 INFO L85 PathProgramCache]: Analyzing trace with hash -1606654719, now seen corresponding path program 6 times [2024-06-21 21:12:19,918 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:12:19,918 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1076418066] [2024-06-21 21:12:19,918 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:12:19,919 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:12:19,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:12:21,291 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:12:21,292 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:12:21,292 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1076418066] [2024-06-21 21:12:21,292 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1076418066] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:12:21,292 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:12:21,292 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2024-06-21 21:12:21,292 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [924040306] [2024-06-21 21:12:21,293 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:12:21,293 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-06-21 21:12:21,293 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:12:21,293 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-06-21 21:12:21,293 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2024-06-21 21:12:21,417 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 21:12:21,417 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 22 transitions, 105 flow. Second operand has 13 states, 13 states have (on average 7.3076923076923075) internal successors, (95), 13 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:12:21,417 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:12:21,417 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 21:12:21,417 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:12:21,628 INFO L124 PetriNetUnfolderBase]: 24/65 cut-off events. [2024-06-21 21:12:21,629 INFO L125 PetriNetUnfolderBase]: For 368/368 co-relation queries the response was YES. [2024-06-21 21:12:21,629 INFO L83 FinitePrefix]: Finished finitePrefix Result has 187 conditions, 65 events. 24/65 cut-off events. For 368/368 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 95 event pairs, 1 based on Foata normal form. 6/70 useless extension candidates. Maximal degree in co-relation 172. Up to 24 conditions per place. [2024-06-21 21:12:21,629 INFO L140 encePairwiseOnDemand]: 21/31 looper letters, 0 selfloop transitions, 0 changer transitions 30/30 dead transitions. [2024-06-21 21:12:21,629 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 58 places, 30 transitions, 155 flow [2024-06-21 21:12:21,629 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 21:12:21,629 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 21:12:21,630 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 95 transitions. [2024-06-21 21:12:21,630 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2785923753665689 [2024-06-21 21:12:21,630 INFO L175 Difference]: Start difference. First operand has 56 places, 22 transitions, 105 flow. Second operand 11 states and 95 transitions. [2024-06-21 21:12:21,630 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 58 places, 30 transitions, 155 flow [2024-06-21 21:12:21,630 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 42 places, 30 transitions, 123 flow, removed 1 selfloop flow, removed 16 redundant places. [2024-06-21 21:12:21,630 INFO L231 Difference]: Finished difference. Result has 42 places, 0 transitions, 0 flow [2024-06-21 21:12:21,630 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=49, PETRI_DIFFERENCE_MINUEND_PLACES=32, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=21, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=21, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=0, PETRI_PLACES=42, PETRI_TRANSITIONS=0} [2024-06-21 21:12:21,630 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 12 predicate places. [2024-06-21 21:12:21,630 INFO L495 AbstractCegarLoop]: Abstraction has has 42 places, 0 transitions, 0 flow [2024-06-21 21:12:21,630 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 7.3076923076923075) internal successors, (95), 13 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:12:21,633 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT (3 of 4 remaining) [2024-06-21 21:12:21,634 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (2 of 4 remaining) [2024-06-21 21:12:21,634 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 4 remaining) [2024-06-21 21:12:21,634 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 4 remaining) [2024-06-21 21:12:21,634 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable152 [2024-06-21 21:12:21,634 INFO L445 BasicCegarLoop]: Path program histogram: [36, 21, 15, 14, 10, 8, 6, 6, 5, 4, 4, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:12:21,637 INFO L229 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2024-06-21 21:12:21,637 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2024-06-21 21:12:21,640 INFO L507 ceAbstractionStarter]: Automizer considered 2 witness invariants [2024-06-21 21:12:21,641 INFO L508 ceAbstractionStarter]: WitnessConsidered=2 [2024-06-21 21:12:21,642 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.06 09:12:21 BasicIcfg [2024-06-21 21:12:21,642 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2024-06-21 21:12:21,642 INFO L158 Benchmark]: Toolchain (without parser) took 193161.67ms. Allocated memory was 182.5MB in the beginning and 1.2GB in the end (delta: 971.0MB). Free memory was 106.2MB in the beginning and 703.4MB in the end (delta: -597.2MB). Peak memory consumption was 375.3MB. Max. memory is 16.1GB. [2024-06-21 21:12:21,642 INFO L158 Benchmark]: CDTParser took 0.24ms. Allocated memory is still 107.0MB. Free memory is still 68.2MB. There was no memory consumed. Max. memory is 16.1GB. [2024-06-21 21:12:21,642 INFO L158 Benchmark]: Witness Parser took 0.13ms. Allocated memory is still 182.5MB. Free memory is still 112.0MB. There was no memory consumed. Max. memory is 16.1GB. [2024-06-21 21:12:21,643 INFO L158 Benchmark]: CACSL2BoogieTranslator took 579.29ms. Allocated memory is still 182.5MB. Free memory was 106.0MB in the beginning and 128.4MB in the end (delta: -22.5MB). Peak memory consumption was 8.5MB. Max. memory is 16.1GB. [2024-06-21 21:12:21,643 INFO L158 Benchmark]: Boogie Procedure Inliner took 37.36ms. Allocated memory is still 182.5MB. Free memory was 128.4MB in the beginning and 125.8MB in the end (delta: 2.6MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2024-06-21 21:12:21,643 INFO L158 Benchmark]: Boogie Preprocessor took 64.40ms. Allocated memory is still 182.5MB. Free memory was 125.8MB in the beginning and 122.2MB in the end (delta: 3.7MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. [2024-06-21 21:12:21,643 INFO L158 Benchmark]: RCFGBuilder took 645.28ms. Allocated memory is still 182.5MB. Free memory was 122.2MB in the beginning and 71.8MB in the end (delta: 50.3MB). Peak memory consumption was 50.3MB. Max. memory is 16.1GB. [2024-06-21 21:12:21,644 INFO L158 Benchmark]: TraceAbstraction took 191831.13ms. Allocated memory was 182.5MB in the beginning and 1.2GB in the end (delta: 971.0MB). Free memory was 71.3MB in the beginning and 703.4MB in the end (delta: -632.1MB). Peak memory consumption was 341.6MB. Max. memory is 16.1GB. [2024-06-21 21:12:21,644 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.24ms. Allocated memory is still 107.0MB. Free memory is still 68.2MB. There was no memory consumed. Max. memory is 16.1GB. * Witness Parser took 0.13ms. Allocated memory is still 182.5MB. Free memory is still 112.0MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 579.29ms. Allocated memory is still 182.5MB. Free memory was 106.0MB in the beginning and 128.4MB in the end (delta: -22.5MB). Peak memory consumption was 8.5MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 37.36ms. Allocated memory is still 182.5MB. Free memory was 128.4MB in the beginning and 125.8MB in the end (delta: 2.6MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 64.40ms. Allocated memory is still 182.5MB. Free memory was 125.8MB in the beginning and 122.2MB in the end (delta: 3.7MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. * RCFGBuilder took 645.28ms. Allocated memory is still 182.5MB. Free memory was 122.2MB in the beginning and 71.8MB in the end (delta: 50.3MB). Peak memory consumption was 50.3MB. Max. memory is 16.1GB. * TraceAbstraction took 191831.13ms. Allocated memory was 182.5MB in the beginning and 1.2GB in the end (delta: 971.0MB). Free memory was 71.3MB in the beginning and 703.4MB in the end (delta: -632.1MB). Peak memory consumption was 341.6MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 818]: invariant of correctness witness holds For all program executions holds that invariant of correctness witness holds at this location - PositiveResult [Line: 819]: invariant of correctness witness holds For all program executions holds that invariant of correctness witness holds at this location - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 5 procedures, 50 locations, 4 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 0.0s, RemoveRedundantFlowTime: 0.0s, RemoveRedundantFlowUnfoldingTime: 0.0s, BackfoldingTime: 0.0s, BackfoldingUnfoldingTime: 0.0s, FlowIncreaseByBackfolding: 0, BasicCegarLoop: OverallTime: 191.7s, OverallIterations: 153, TraceHistogramMax: 1, PathProgramHistogramMax: 36, EmptinessCheckTime: 0.0s, AutomataDifference: 75.3s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 10596 SdHoareTripleChecker+Valid, 33.0s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 8925 mSDsluCounter, 9228 SdHoareTripleChecker+Invalid, 28.6s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 8300 mSDsCounter, 2301 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 56669 IncrementalHoareTripleChecker+Invalid, 58970 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 2301 mSolverCounterUnsat, 928 mSDtfsCounter, 56669 mSolverCounterSat, 0.2s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 1664 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1663 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3514 ImplicationChecksByTransitivity, 42.6s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=2280occurred in iteration=82, InterpolantAutomatonStates: 1481, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.2s SsaConstructionTime, 0.9s SatisfiabilityAnalysisTime, 114.3s InterpolantComputationTime, 2489 NumberOfCodeBlocks, 2489 NumberOfCodeBlocksAsserted, 153 NumberOfCheckSat, 2336 ConstructedInterpolants, 0 QuantifiedInterpolants, 106616 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 153 InterpolantComputations, 153 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 2 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! [2024-06-21 21:12:21,679 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Ended with exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Result: TRUE